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柠檬渣吸附磷的研究 预览 被引量:2

Absorption of Phosphorus by Lemon Residues
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摘要 为了研究柠檬渣对磷的吸附,利用H_2SO_4和CaCl_2溶液对柠檬渣进行了改性,并采用L_(16)(4~5)正交实验进行了优化。测试了吸附剂的比表面积、孔容与孔径等性能,并利用电镜和能谱(SEM/EDS)对吸附剂进行了表征。实验结果表明吸附影响因素的最优组合为CaCl_2溶液的质量浓度为20%、溶液pH值为8.5、吸附时间为120min和吸附温度为25℃,在此最优条件下柠檬渣吸附磷的吸附率可达到93.6%,因素的主次关系依次为CaCl_2质量浓度〉吸附时间〉吸附温度〉pH值,且CaCl_2溶液的质量浓度具有显著性。柠檬渣经改性后比表面积增加了近4倍,孔容、孔径和碘吸附值变化不大,灰分率减少了近70%;吸附后柠檬渣中含有P元素,但形成的峰都不高。 To study the adsorption of phosphorus by lemon residues, the lemon residues was modified by H2SO4 and CaC12 solution,and the L16(4^5) orthogonal design was used to optimize the modification conditions. The specific surface area, pore volume and pore size of the adsorbent were tested. The adsorbent were characterized by SEM/EDS. The result showed that the optimal combination of modification conditions was CaCl2 mass concentration of 20%, pH 8.5, adsorp- tion time of 120 min and adsorption temperature of 25 ℃. Under these conditions, the absorption rate of phosphorus reached 93.6%. The significanee of influeneing factors was in the sequence of CaCl2 mass eoneentration, adsorption time, adsorption temperature, pH. Tthe influence of CaCl2 mass eoneentration was significant. After modification, the spe- cific surface area increased by nearly 4 times, but the change of pore volume, pore size and iodine adsorption were little, and the ash rate reduced by nearly 70%. After adsorption,the elements of P were detected in the lemon residue,but its peak was not high.
作者 魏锡均 郑光波 胡贝贝 汪阳平 沈王庆 WEI Xi-jun, ZHENG Guang-bo, HU Bai-bei, WANG Yang-ping, SHEN Wang-qing( 1 Key Laboratory of Fruit Waste Treatment and Resource Recycling of Sichuan Provincial College; 2 College of Chemistry and Chemical Engineering, Neijiang Normal University, Neijiang 641100, China)
出处 《天然产物研究与开发》 CAS CSCD 北大核心 2016年第6期959-964,共6页 Natural Product Research and Development
基金 基金项目:2014年度内江师范学院大学生科研项目(14NSD-17) 2013年度四川省大学生创新创业训练计划(201310640012) 2013年四川省教育厅重点资助项目(13ZA0002)
关键词 柠檬渣 改性 吸附 lemon residue modification adsorption phosphorus
作者简介 通讯作者Tel:86-013628136861;E-mail:sttw7418@163.com
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参考文献14

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