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Hydrochemistry of Surface and Groundwater in the Vicinity of a Mine Waste Rock Dump: Assessing Impact of Acid Rock Drainage (ARD) 预览
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作者 Francis Krampah George Lartey-Young +2 位作者 Peter O. Sanful Oscar Dawohoso Austin Asare 《地球科学和环境保护期刊(英文)》 2019年第1期52-67,共16页
Acid Rock Drainage (ARD) is a well-known problem related to the mining industry due to its hazardous environmental effects. Metal-rich drainage and acid effluent transmitted from mine waste dumps compromise environmen... Acid Rock Drainage (ARD) is a well-known problem related to the mining industry due to its hazardous environmental effects. Metal-rich drainage and acid effluent transmitted from mine waste dumps compromise environmental quality of groundwater and surface water systems destroying aquatic life and increasing human health risks. This study was aimed at assessing the acid and metal drainage potential from the Subriso East Rock Dump (SERD) located in the Wassa East district of Ghana on ground and surface water quality in the catchment using a system of monitoring boreholes, reference boreholes and river samples. Water samples were collected from deep and shallow monitoring boreholes and surface water within the immediate environs of the SERD from August 2012 to February 2013 for laboratory and statistical analysis. Parameters analyzed include sulphate, alkalinity, Arsenic (As), Manganese (Mn), Iron (Fe), Zinc (Zn), Copper (Cu), Cadmium (Cd), Mercury (Hg), Aluminum (Al), Silver (Ag) and lead (Pb) and their concentrations compared with Ghana Standards Authority (GSA) GSB (2009) and WHO (2017) standards. Results indicate that surface and groundwater were not impacted by the SERD possibly because there was no generation of acid or metal-loaded effluent from the SERD into the environment. Physicochemical variables between monitoring boreholes did not differ significantly from conditions in the reference boreholes. Similarly, comparison of upstream and downstream river conditions did not yield any statistical significance (p > 0.05). Mn and Fe concentrations were above the WHO (2017)/GSB (2009) standards. Heavy metal concentrations in surface and groundwater were below detection limits except manganese and iron whose concentrations exceeded the recommended guidelines. No significant environmental impacts exist that could be attributed to the waste rock dump and may be as a result of engineering designs and mechanisms which prevent acid generated water from reaching the external environment. Furthermore, the geology of the 展开更多
关键词 Waste ROCK DUMP Acid ROCK Drainage SURFACE WATER Ground WATER Wassa East District WATER Quality
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武汉市5种常见生活饮用水水质状况调查
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作者 王美璇 李彰鹏 +5 位作者 雷春生 李冰柔 程晓莉 甘正霞 张晴 赵红静 《职业与健康》 CAS 2019年第17期2429-2432,共4页
目的了解武汉市5种常见生活饮用水水质状况,为大众选择合适饮用水提供参考依据。方法测定武汉市2018年5种饮用水的常见水质指标,计算水质综合指数,对水质进行初步评价,在此基础上结合藻类毒性效应测试,确定最佳饮用水。结果水质综合指... 目的了解武汉市5种常见生活饮用水水质状况,为大众选择合适饮用水提供参考依据。方法测定武汉市2018年5种饮用水的常见水质指标,计算水质综合指数,对水质进行初步评价,在此基础上结合藻类毒性效应测试,确定最佳饮用水。结果水质综合指数由小到大依次为凉开水E<A品牌纯净水与B品牌矿泉水(均为0.07)<D品牌超滤净水器净化水(0.32)<C品牌反渗透净水器净化水(1.15),表明凉开水E、A品牌纯净水、B品牌矿泉水的水质最好,D品牌超滤净水器净化水水质次之,而C品牌反渗透净水器净化水水质最差。其中B品牌矿泉水、A品牌纯净水、凉开水E、D品牌超滤净水器净化水均属于合格饮用水,可放心饮用。而C品牌反渗透净水器净化水为不合格直接饮用水,其水质综合指数偏大主要由细菌总数(13 933.00 CFU/mL)引起藻类毒性效应测试表明,斜生栅藻生长繁殖速率由快到慢依次为凉开水E(0.058 OD值/天)>A品牌纯净水(0.026 OD值/天)>B品牌矿泉水(0.021 OD值/天)>D品牌超滤净水器净化水(0.012 OD值/天)>C品牌反渗透净水器净化水(0.003 OD值/天)。其中凉开水E最适合斜生栅藻生长繁殖,C品牌反渗透净水器净化水对藻类的生长繁殖则具有一定的抑制作用。结论武汉市5种常见饮用水中凉开水E为最佳饮用水,C品牌反渗透净水器净化水不建议直接饮用,可经煮沸后饮用。 展开更多
关键词 凉开水 纯净水 矿泉水 超滤净化水 反渗透净化水 水质 藻类毒性
A Systematic Review and Meta-Analysis of Water Quality Indices 预览
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作者 Kanga Idé Soumaila Albachir Seydou Niandou +4 位作者 Mustapha Naimi Chikhaoui Mohamed Keith Schimmel Stephanie Luster-Teasley Naeem Nizar Sheick 《农业科学与技术:B》 2019年第1期1-14,共14页
Water quality indices (WQI) are useful tools for indicating the suitability of water for an expected use. However, they can suffer from some problems. The objective of this paper was to analyze the development of WQI ... Water quality indices (WQI) are useful tools for indicating the suitability of water for an expected use. However, they can suffer from some problems. The objective of this paper was to analyze the development of WQI to determine which parameters are used in water quality assessment and to discuss the characteristics of WQI. To screen articles on WQI, the Preferred Reporting Items for Systematic Reviews and Meta-Analyses (PRISMA) method is applied to include or exclude articles. Four necessary steps are needed to design WQI: parameter selection, standardization, weighting and aggregation. A set of six methods of aggregations of sub-indices are identified: the arithmetic mean, the geometric mean, the root square, the logarithmic function, the fuzzy inference and the minimum operator. The problems encountered for the overall index are different according to the form of aggregation. They are eclipsing, ambiguity, rigidity or flexibility, adaptability and compensation. The chemical parameters (70%) are the most used in the development of WQI with the physical parameters used at 24% and the biological parameters at 6%. Dissolved oxygen (DO, 87%), total coliforms (87%), biological oxygen demand (BOD, 73%), pH (73%), temperature (67%), turbidity (60%), ammonia (53%), ammonium (47%) and total dissolved solids (47%) are the most commonly used parameters for water quality assessment. 展开更多
关键词 WATER QUALITY indices WATER QUALITY PARAMETERS WATER QUALITY assessment REVIEW META-ANALYSIS
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Physico-Chemical and Microbiological Quality Assessment of Supply Water around Dhaka City, Bangladesh 预览
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作者 Md. Shamimuzzaman Rashed Hasan Nayeem +3 位作者 Nargis Ara Md. Masuder Rahman Md. Iqbal Kabir Jahid Md. Nazmul Hasan 《水资源与保护(英文)》 2019年第3期280-295,共16页
Dhaka is one of the most densely-populated megacities in the world. Water supply problem is acute in this city, but the quality of drinking water has tremendous importance as potability. This study was aimed at compar... Dhaka is one of the most densely-populated megacities in the world. Water supply problem is acute in this city, but the quality of drinking water has tremendous importance as potability. This study was aimed at comparing various physicochemical and microbiological parameters which are very much relevant for the drinking water quality of Dhaka city of Bangladesh. A total of 80 samples from 11 collection point of different places were collected over ten months. After that, the samples were examined by a different measuring device for physicochemical parameter testing. Considering physicochemical parameters, all water samples were within the limit for pH. However, 53.75% water had unsatisfactory for chlorine level. Total Dissolve Solid (TDS), hardness, iron, and alkalinity based unsatisfactory were 28.75%, 15.0%, 8.75%, and 3.75% respectively. Five parameters had taken into consideration to measure the microbiological quality. The cultural and biochemical methods showed that 80 water samples have a different range of contamination. The total aerobic count was unsatisfactory for 53.75% samples. Sixty-one samples were found coliform contaminated that is 76.25% of the total samples and 58.75% sample was carried fecal substances. E. coli and Vibrio was unsatisfactory as 61.25% and13.75% respectively. This study revealed that how much safe is supplied water of a municipal water supplier. 展开更多
关键词 WATER Quality Microbial Assay COLIFORM FECAL COLIFORM CHLORINATION Potability Physicochemical Properties of WATER Pathogen
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长江徐六泾近6年水质变化趋势及其响应机制分析 预览
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作者 胡裕滔 周才杨 虞铭卫 《人民长江》 北大核心 2019年第11期49-55,63,共8页
根据徐六泾水质自动站自2013年1月至2018年10月共303周的水质监测数据,分析了5项水质基本指标(水温、pH值、溶解氧、电导率、浊度)和3项重点监测指标(总有机碳、氨氮、高锰酸盐指数)近6 a的变化趋势。对比了溶解氧、高锰酸盐指数和氨氮... 根据徐六泾水质自动站自2013年1月至2018年10月共303周的水质监测数据,分析了5项水质基本指标(水温、pH值、溶解氧、电导率、浊度)和3项重点监测指标(总有机碳、氨氮、高锰酸盐指数)近6 a的变化趋势。对比了溶解氧、高锰酸盐指数和氨氮3项指标2016年1月至2017年10月的人工监测数据,并采用综合水质标识指数法初步探究了自动监测系统对徐六泾断面水质综合变化的预警响应机制。结果表明:徐六泾断面近6 a水环境质量较好,各指标数值波动幅度逐渐减小;两种监测方式对溶解氧和高锰酸盐指数的检测结果相对偏差≤20%的分别占比100%和84.2%,而对氨氮的检测结果相对偏差≤20%的仅占比42.1%。经分析认为主要是由两种方式的检测方法原理不同所引起的系统偏差。但通过单因子水质评价法进行评价时,两种方式的评价结果仍具有较高的一致性;自动监测系统根据响应机制能够直接反馈徐六泾断面水质综合变化情况。徐六泾水质自动监系统不仅为城市供水提供安全保障,更为保护长江口区域生态环境提供科学依据。 展开更多
关键词 水质变化趋势 综合水质标识指数法 自动监测系统 响应机制 徐六泾 长江口
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Analysis of Bacteriological Quality of Domestic Water Sources in Kabale Municipality, Western Uganda 预览
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作者 Alex Saturday Johnson Runyonyozi 《水资源与保护(英文)》 2019年第5期581-594,共14页
In the present study, we assessed the bacteriological quality of water of drinking water sources in Kabale Municipality. A total of 28 water samples were collected from 14 water springs during the dry and wet season a... In the present study, we assessed the bacteriological quality of water of drinking water sources in Kabale Municipality. A total of 28 water samples were collected from 14 water springs during the dry and wet season and analyzed for determination of Escherichia coli (E. coli), and Total Heterotrophic Bacteria (THB) using the membrane filtration method. Most water springs located in less than 20 meters away from residential areas were associated with bacterial contamination. The mean concentrations of E. coli, total coliforms, and THB were 24.07 CFU/100 ml, 85.71 CFU/100 ml, and 197.07 CFU/100 ml, respectively in the wet season. While in the dry season, the mean concentrations were 2 CFU/100 ml, 10 CFU/100 ml, and 91 CFU/100 ml for E. coli, total coliforms, and THB, respectively. There were significant differences between CFU of total coliforms, HTB, between wet and dry seasons (p = 0.026). Samples collected and analyzed during the wet season for total coliforms did not conform to WHO drinking water quality guideline value of no detection per 100 ml. The study concludes that the majority of spring water sources are located in less than 20 meters away from residential areas with significant paved areas, the presence of septic tanks and pit latrines. Wet season significantly affects the quality of domestic water sources than the dry season. The study recommends that spring water should be treated before drinking due to high bacteria concentrations which makes it unsafe for consumption. 展开更多
关键词 WATER Quality DRINKING WATER SOURCES Total COLIFORM E. COLI
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川西高原集中式饮用水源地水质现状与水质安全评价的结论与对策 预览
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作者 闫宗平 赵英 刘剑 《鲁东大学学报:自然科学版》 2019年第2期143-149,共7页
饮用水安全关系着当地居民的身体健康和生命安全.为了全面了解川西高原集中式饮用水源地水质现状和安全情况,选择了代表性地区作为研究对象,基于2014—2015年的水质数据,通过单因子进行水质现状分析.结果表明,100个地表水源地中48%水源... 饮用水安全关系着当地居民的身体健康和生命安全.为了全面了解川西高原集中式饮用水源地水质现状和安全情况,选择了代表性地区作为研究对象,基于2014—2015年的水质数据,通过单因子进行水质现状分析.结果表明,100个地表水源地中48%水源地水质达Ⅱ类标准,93%水源地水质达Ⅲ类标准,超标的基本项目主要是总氮、溶解氧、总磷,其次是锰、铁;地下水型集中式饮用水水源地中100%水源地水质达Ⅲ类标准.通过水源地安全状况评价技术进行水质安全评价,地表水质安全指数为3级或好于3级的水源地(即合格水源地)占评价水源地总数的99%,不合格水源地1个,主要表现在铅元素超标.地下水水源地全部合格. 展开更多
关键词 水源地 水质 水质安全 川西高原
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基于MIKE11模型的感潮河网水环境治理研究与应用 预览
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作者 蒋雪莲 《广东水利水电》 2019年第5期54-57,61共5页
针对感潮河网,采用MIKE11水动力模块(HD)、对流扩散模块(AD)对河涌水系进行水动力和水质模拟计算,分析评价利用潮汐动力及闸泵调度的补水量及补水活水后水环境质量的改善效果。通过实例分析表明,利用MIKE11模型的HD、AD模块构建的一维... 针对感潮河网,采用MIKE11水动力模块(HD)、对流扩散模块(AD)对河涌水系进行水动力和水质模拟计算,分析评价利用潮汐动力及闸泵调度的补水量及补水活水后水环境质量的改善效果。通过实例分析表明,利用MIKE11模型的HD、AD模块构建的一维水动力与水质模型来研究改善感潮河网水量水质的方案计算简单、可靠、效率高,可直接确定水闸和泵站的规划流量、污染源汇入点流量和浓度,输出河涌各断面的水位过程线及污染物浓度的过程线,是较为有效的分析途径,能为水环境治理项目实施安排提供决策依据。 展开更多
关键词 感潮河网 水动力 水质 补水 活水 水环境治理
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不同再生水占比景观水体水质演变机制实验研究 预览
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作者 汪啸宇 潘成忠 +1 位作者 刘春雷 郭中方 《南水北调与水利科技》 CAS 北大核心 2019年第1期76-83,共8页
以永定河(北京段)为研究对象,开展不同再生水占比景观水体连续24d的水质监测实验,监测指标包括化学需氧量、氨氮、溶解氧、pH、电导率及土壤微生物多样性等。结果分析表明:相同实验条件下永定河上游山峡段河岸带土壤微生物多样性明显好... 以永定河(北京段)为研究对象,开展不同再生水占比景观水体连续24d的水质监测实验,监测指标包括化学需氧量、氨氮、溶解氧、pH、电导率及土壤微生物多样性等。结果分析表明:相同实验条件下永定河上游山峡段河岸带土壤微生物多样性明显好于下游沙质断流河岸带土壤,而二者混合形成的沙土有利于丰富土壤微生物多样性;高再生水占比水体对于环境更加敏感,更容易因为外部因素引起水质变化,在高温下水质恶化速率更快;根据实验所监测的多项水质指标与生态效应综合分析,静止景观水体再生水占比在超过75%以后水质持续恶化,推荐永定河实际景观河道再生水占比控制在75%以下。 展开更多
关键词 再生水 水温 水质 土壤微生物 景观水体
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嘉兴附近海域海洋环境现状调查 预览
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作者 张玉荣 王姮 朱剑 《广州化工》 CAS 2019年第20期122-125,150共5页
2017年秋季对嘉兴附近海域的水质、沉积物和生物体质量进行了调查研究,调查结果表明两大营养盐类(无机氮和活性磷酸盐)较高是影响调查附近海域海水水质的主要因素.石油类、有机碳、硫化物、重金属(铜、锌、铅、镉、铬、汞、砷)的含量均... 2017年秋季对嘉兴附近海域的水质、沉积物和生物体质量进行了调查研究,调查结果表明两大营养盐类(无机氮和活性磷酸盐)较高是影响调查附近海域海水水质的主要因素.石油类、有机碳、硫化物、重金属(铜、锌、铅、镉、铬、汞、砷)的含量均符合一类海洋沉积物质量标准.调查海域代表性物中的铜、铅、锌、镉、汞、铬、砷和石油烃的含量均符合海洋生物质量评价标准. 展开更多
关键词 嘉兴 水质 沉积物质量 生物体质量
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Drainage Management Problems Evaluation: Case Study Baloza and EL-Farama Drains, North Sinai, Egypt 预览
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作者 Mohamed Gabr 《水资源与保护(英文)》 2019年第6期675-689,共15页
Drainage management activities aim at maintaining the performance of drainage networks by assessing the major drainage management problems regarding sedimentation, bank erosion, vegetation, water quality, and biodiver... Drainage management activities aim at maintaining the performance of drainage networks by assessing the major drainage management problems regarding sedimentation, bank erosion, vegetation, water quality, and biodiversity, to find appropriate solutions for channel improvement in order to increase agricultural productivity and maintain agricultural land and the surrounding environment. In this research, we evaluate the drainage management problems to the surface drains Baloza and EL-Farama in the cultivated Tina Plain region (21,000 hectares) North Sinai, Egypt to provide an accurate data to help decision-makers to know the status of maintenance of the watercourses and the need for improvement. For this, Intensive field investigations were carried out regarding a hydrographic survey of the actual drains cross-section using total station and aqua sounder devices, visual stream bank erosion survey, and vegetation survey. In addition, monthly water samples from the drainage water were treated and analyzed for physical and chemical, bacteriological related indices. The results showed, the studied drains suffer from sedimentation, vegetation infection, and bank erosion in some reaches and need remedy. Estimated sedimentation in EL-Farama Drain was 34369 m3/year and in Baloza Drain 29153 m3/year;bank slope failures upstream and downstream pump stations were recorded;the average weed infection ratio for both drains was 30%. The results of water quality parameters showed acceptable concentrations for BOD, DO, NO3, and total coliform according to Egypt decree, 92/2013 for the protection of the Nile River and its waterways from pollution, except TDS (more than 10,000 mg/L). The drainage water was classified as high saline and it was unacceptable for irrigation. Therefore, the author recommends to remove sedimentation and vegetation every 2 years by mechanical methods, applying gabions lining to prevent bank erosion, and treating drainage water using wetland system and utilizing the treated wastewater in fish farming. 展开更多
关键词 Drainage Management SEDIMENTATION VEGETATION Water Quality Surface DRAINS
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Water Quality in and around Lake Edward Basin of the Greater Virunga Landscape, D. R. Congo Side 预览
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作者 Katcho Karume Mashimango Bagalwa +4 位作者 Espoir Bagula Mapendano Yalire Patrick Habakaramo James Byamukama Nachigera Mushagalusa 《环境保护(英文)》 2019年第9期1174-1193,共20页
A systematic study has been carried out to assess the water quality in and around Lake Edward basin in D.R. Congo Side. Fifty four water samples were collected and analyzed for physicochemical parameters, including: t... A systematic study has been carried out to assess the water quality in and around Lake Edward basin in D.R. Congo Side. Fifty four water samples were collected and analyzed for physicochemical parameters, including: temperature, discharge, pH, electrical conductivity, transparency, dissolved oxygen, COD, BOD, Carbonate, Bicarbonate, alkalinity, total hardness, turbidity, calcium hardness, calcium, magnesium hardness, magnesium, total nitrogen, ammonium, nitrate, total phosphorus, soluble reactive phosphorus, chloride, sulphate and total suspended solids. For bacteriological parameters: fecal bacteria, enterococcus bacteria, vibrio and salmonella shigella bacteria were considered. For macroinvertebrates assemblages all taxa using standards methods for each parameter. A comparison of data from dry (June to August) and wet (September to May) season was done in and around Lake Eduard watershed. The analytical data of various physicochemical parameters indicates that water characteristics in the watershed were in the limit of WHO standards for drinking water and aquatic life. Bacteriological water quality of some ecosystems in the watershed revealed the infestation of water with bacteria which make the water unusable for drinking by the surrounding population near and within Lake Eduard watershed. Longtime period sampling in the watershed is needed to understand the variation and composition of water quality and aquatic macroinvertebrate environment of the watershed. 展开更多
关键词 Water Quality LAKE Eduard GREATER Virunga LANDSCAPE D. R. CONGO
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Can One Drink Informal Water Alternatives Directly? Using Mobile Phone to Establish Trust in Quality 预览
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作者 Elisha Akech Ochungo Gilbert Ong’isa Ouma +1 位作者 John Paul Odhiambo Obiero Nicodemus Abungu Odero 《水资源与保护(英文)》 2019年第10期1260-1277,共18页
The informal water market in cities within the Global South is expanding, thanks to drought associated water shortage challenges and other socio-hydrological factors. A midst the growth is the inherent information sig... The informal water market in cities within the Global South is expanding, thanks to drought associated water shortage challenges and other socio-hydrological factors. A midst the growth is the inherent information signal asymmetry driven mainly by the vendors’ unwillingness to share the actual quality data of their source water with their customers. As a result a big mistrust environment has been created as currently;the customers have no mechanism to verify the water quality in real time. This paper aimed at developing an android application software system to fill the gap. The system is to operate the water vending business landscape as a trusted social network site (SNS) using handheld mobile phone devices. An Agile-Scrum methodology was utilized as it allows for quick changes to the system as necessary. An android platform was chosen as the initial Operating System (OS) to run the software system due to its faster global outreach capability. Specifically, Android Studio 3.4.2 IDE running on Windows 10 was deployed. And the primary languages used within the IDE were;Kotlin for the functionality and XML for the user interface (UI). Additionally, the Firebase SDK tools were used for cloud-based database functionality. The results of the prototype include;user side access and feedback exchanges, backend side supports and other added functionalities. The paper is of the strong view that since the system works on anytime-anywhere modality, then it is possible that one can drink the informal water directly. The system is recommended for full scale trial in the affected cities. 展开更多
关键词 SIGNAL INFORMAL WATER QUALITY TRUST Android Application DRINK
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Recovery of Scenic Beauty of a Lake in Urban Park from Environmental Diagnosis and Implantation of Mitigating Measures 预览
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作者 Joã o Alexandre Saviolo Osti +4 位作者 Clovis Ferreira Do Carmo Marcos Cerqueira Maria Teresa Duarte Giamas Ana Carolina Peixoto Cacilda Thais Janson Cacilda Thais Janson 《水资源与保护(英文)》 2019年第5期595-605,共11页
The city of S?o Paulo, state of S?o Paulo/Brazil, with about 12 million inhabitants is considered the largest city in Latin America. Just as in other large metropolises it is devoid of green areas, in this way it is o... The city of S?o Paulo, state of S?o Paulo/Brazil, with about 12 million inhabitants is considered the largest city in Latin America. Just as in other large metropolises it is devoid of green areas, in this way it is of great socio-environmental importance of the preservation and maintenance of parks and green areas of the municipality. The Fernando Costa Park, known as the Parque da água Branca, is an urban park located in the central region of the Municipality of S?o Paulo, and has more than 79 thousand m2 of green area, in a total area of 137 thousand m2. Two lakes, populated predominantly with carp, are inserted in the Park, and are important components of the urban landscape and the patrimony of the city, present landscape function (scenic beauty) and are used to contemplate the environment and leisure of the population. The lakes due to the intense eutrophication process with uncontrolled growth of the phytoplankton presented blue-green coloration, with formations of lumps and foams, low transparency, bad smell and unpleasant visual aspect impairing the visitation of this place. In the first stage of the present research, an environmental diagnosis was carried out and the second stage involved elaboration and implementation of mitigating measures aiming at its restoration. The recovery proposal included the implementation of Artificial Floating Islands (IFAs) aiming at pollution control. After 60 days, it was possible to observe the efficiency of the Eichhornia crassipes populated islands showing that the methodology of phytoremediation was efficient in controlling the eutrophication of urban lakes, guaranteeing the recovery and conservation of the scenic beauty of these places. 展开更多
关键词 Water Quality EUTROPHICATION POLLUTION LANDSCAPE ECOLOGY
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污水水质对聚合物溶液粘度影响 预览
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作者 苑光宇 罗焕 《化学工程师》 CAS 2019年第6期73-78,共6页
体系粘度是化学驱体系发挥波及效果最重要的性能之一,在矿场应用中,配制用水水质是影响聚合物溶液粘度的重要因素甚至是决定因素。综述了水质中影响聚合物溶液粘度的因素,分析了各个因素的影响程度、影响机理,按照影响程度级别对影响因... 体系粘度是化学驱体系发挥波及效果最重要的性能之一,在矿场应用中,配制用水水质是影响聚合物溶液粘度的重要因素甚至是决定因素。综述了水质中影响聚合物溶液粘度的因素,分析了各个因素的影响程度、影响机理,按照影响程度级别对影响因素进行了分类,最终给出了建议的水质控制项目及指标上限,为化学驱现场改善水质、保证体系粘度提供参考。 展开更多
关键词 化学驱 水质 聚合物溶液粘度 水质指标
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沙河水环境质量模糊综合评价 预览
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作者 刘玉伟 刘剑 《河北水利电力学院学报》 2019年第1期35-38,共4页
根据沙河水质监测资料,对于唐山段的滨河村、石佛口和小集断面建立了水环境模糊综合评价矩阵,确定了污染因子的权重系数,并据此对沙河唐山段水环境质量进行评价。评价结果表明,模糊综合评价法能客观地反映水质状况,可为水资源的利用和... 根据沙河水质监测资料,对于唐山段的滨河村、石佛口和小集断面建立了水环境模糊综合评价矩阵,确定了污染因子的权重系数,并据此对沙河唐山段水环境质量进行评价。评价结果表明,模糊综合评价法能客观地反映水质状况,可为水资源的利用和水环境综合治理提供更客观的依据。 展开更多
关键词 模糊综合评价 水质 水质评价
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Statistical and Geospatial Assessment of Groundwater Quality in the Megacity of Karachi 预览
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作者 Muhammad Kamran Khan Waill Ayoub +4 位作者 Sumayya Saied Mirza Muzammil Hussain Saiyada Shadiah Masood Azhar Siddique Haider Abbas Khwaja 《水资源与保护(英文)》 2019年第3期311-332,共22页
Inserting Groundwater quality variability and sources potentially contributing to aquifer recharge was evaluated in metropolitan Karachi. Selected sampling sites were characterized by large waste dumping sites, indust... Inserting Groundwater quality variability and sources potentially contributing to aquifer recharge was evaluated in metropolitan Karachi. Selected sampling sites were characterized by large waste dumping sites, industrial zones, and the presence of open streams receiving heavy loads of industrial and domestic wastes. Levels of pH, electrical conductivity (EC), fluoride (F-), chloride (Cl-), bromide (Br-), nitrate-N (NO-3-N), sulfate (SO2-4), sodium (Na+), potassium (K+), calcium (Ca2+), magnesium (Mg2+), and ammonium (NH+4) were determined and compared with the WHO permissible limits. Concentrations of the measured ions were in the order of Cl- > Na+ > SO2-4 > Mg2+ > Ca2+ > NO-3-N > K+ > F- > Br-. EC values were above the WHO guidelines, representing the presence of high ionic concentration in the groundwater. The health risk index (HRI) for indicated that inhabitants of Karachi are at risk of high exposure. Ingestion of high concentrations of NO-3-N in water can cause methemoglobinemia and birth defects. Results of multivariate statistical analysis, principal component analysis (PCA), cluster analysis (CA), and geographic information system (GIS) map analysis revealed that human activities are leading to adverse effects on the existing groundwater quality in Karachi. 展开更多
关键词 GROUNDWATER KARACHI Water Quality MULTIVARIATE Analysis GEOSPATIAL Health Risk Index
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Impact on Wastewater Quality of Biopellets Composed of <i>Chlorella vulgaris</i>and <i>Aspergillus niger</i>and Lipid Content in the Harvested Biomass 预览
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作者 Malin Hultberg Hristina Bodin +1 位作者 ran Birgersson 《水资源与保护(英文)》 2019年第7期831-843,共13页
Filamentous fungi can be used to form easily harvested pellets with microalgae (fungal-assisted algal harvesting) in order to advance the sustainability and economic feasibility of wastewater treatment using microalga... Filamentous fungi can be used to form easily harvested pellets with microalgae (fungal-assisted algal harvesting) in order to advance the sustainability and economic feasibility of wastewater treatment using microalgae. In experiments employing the microalga Chlorella vulgaris and using the filamentous fungus Aspergillus niger for harvesting, this study investigated the effect on water quality and the quantity and quality of lipids in the biomass produced. Major reductions in the concentrations of total nitrogen, ammonium-nitrogen and total phosphorus were observed after addition of the fungal spores (day 5) and during fungal growth and entrapment of the algal cells. At harvest (day 8), the decrease in total nitrogen was 47.4% ± 18.4% of the initial value, corresponding to a reduction of 41.9 ± 17.1 mg·nitrogen·L-1. For total phosphorus, the decrease was 94.4% ± 3.2%, corresponding to a reduction of 6.4 ± 0.2 mg·phosphorus·L-1. A significant decrease in concentration of the micropollutant diclofenac was observed at harvest, to 5.1 ± 4.0 μg·L-1 compared with an initial concentration of 9.5 ± 0.6 μg·L-1. A significant decrease in total lipids in the biomass was observed after fungal-assisted algal harvesting, from 58.7 ± 2.7 μg·mg-1 at day 5 (algal biomass only) to 34.2 ± 2.7 μg·mg-1 at day 8 (fungal-algal biomass). However, because of high biomass production, the amount of lipids produced per litre of wastewater increased from 5.6 ± 0.9 mg on day 5 to 20.6 ± 4.9 mg on day 8. 展开更多
关键词 Aspergillus NIGER Bioremediation CHLORELLA vulgaris DICLOFENAC Water Quality
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广东徐闻珊瑚礁国家级自然保护区海域水质环境状况分析及评价 预览
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作者 张艳苹 沈城 +2 位作者 李锋 彭慧湃 刘丽 《热带农业科学》 2019年第3期39-43,共5页
2017年10月对广东徐闻珊瑚礁国家级自然保护区内水质进行调查监测,共设置调查站位10个。监测指标包含pH值、水温、盐度、透明度、溶解氧、亚硝酸盐、氨氮、硝酸盐、活性磷酸盐、COD、石油类、悬浮物等12个。采用单项水质指数法、有机体... 2017年10月对广东徐闻珊瑚礁国家级自然保护区内水质进行调查监测,共设置调查站位10个。监测指标包含pH值、水温、盐度、透明度、溶解氧、亚硝酸盐、氨氮、硝酸盐、活性磷酸盐、COD、石油类、悬浮物等12个。采用单项水质指数法、有机体污染指数法以及水体富营养化指数法对监测海域水质进行分析与评价。结果显示:广东徐闻珊瑚礁国家级保护区内部分站位活性磷酸盐含量超标,导致对应站点水质评价指数>1,有机污染指数>1,但富营养化评价指标在10个站位均<1,表明保护区内水质开始受到轻微污染。 展开更多
关键词 水质 单项水质指数法 有机污染指数法 富营养化指数法
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Influence of Water Quality on the Variation Patterns of the Communities of Benthic Macroinvertebrates in the Lakes of the Central Highlands of Peru 预览
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作者 María Custodio Richard Pe?aloza 《海洋科学期刊(英文)》 2019年第1期1-17,共17页
The influence of water quality on the variation patters of benthic macroin-vertebrate communities in the lakes in the central highlands of Peru was eva-luated. Samples of water and sediments were collected in 23 diffe... The influence of water quality on the variation patters of benthic macroin-vertebrate communities in the lakes in the central highlands of Peru was eva-luated. Samples of water and sediments were collected in 23 different sam-pling sites last 2017. The physiochemical variables of water quality deter-mined on site were: DO, TDS, EC, temperature and pH. The results obtained revealed that the physiochemical indicators are within the environmental quality standards for water, except COD and BOD5. Regarding the benthic macroinvertebrates, four phyla were identified wherein the most common is the phylum Arthropoda having the abundance and richness of taxa. The PCA reduced the variables to a few significant components that caused variation in water quality between lakes. The cluster analysis in relation to the relative abundance of benthic macroinvertibrates grouped the 22 sampling sites into three groups with the similar characteristics. The PCoA analysis of the ben-thic macroinvertebrate communities showed a clear separation of sites. The SIMPER analysis at the family-level showed the distribution of the most common species. Therefore, at a significance level of 0.01 it demonstrates that there are significant differences between the number of species and abun-dance of the areas that were evaluated. 展开更多
关键词 High Andean WETLANDS Water QUALITY BENTHIC MACROINVERTEBRATES Diversity
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