Kurzbaum Eyal, Raizner Yasmin, Cohen Oded, Rubinstein Guy, Bar Shalom Oded
Shamir Research Institute, University of Haifa, P.O. Box 97, 12900, Katzrin, Israel.
Fisheries and Aquaculture Department, Israel Ministry of Agriculture and Rural Development, Beit Dagan, Israel.
Environ Sci Pollut Res Int. 2017 Jun;24(17):15182-15186. doi: 10.1007/s11356-017-9116-0. Epub 2017 May 10.
Adsorption has been suggested as an effective method for removing phosphates from agricultural wastewater effluents that contain relatively high phosphate concentrations. The present study focused on the use of a bentonite-lanthanum clay (Phoslock) for reducing the dissolved phosphate concentration in fishpond effluents. Batch experiments with synthetic phosphate-spiked solutions and with fishpond effluents were performed in order to determine adsorption equilibrium isotherms and kinetics as well as to determine the efficiency of Phoslock in removing phosphate from these solutions. In the synthetic phosphate-spiked solution, the mean maximum phosphate adsorption capacity was 92 mg Phoslock/mg phosphate removal. A ratio of 50, 100, and 200 mg Phoslock/mg phosphate removal was found for complete phosphate removal from the fishpond effluents, where higher doses of Phoslock led to a faster removal rate (94% removal within the first 150 min). These results show that bentonite-lanthanum clay can be employed for designing a treatment process for efficient phosphate removal from fishpond effluents.
吸附已被认为是一种从含磷浓度相对较高的农业废水流出物中去除磷酸盐的有效方法。本研究聚焦于使用膨润土-镧粘土（Phoslock）来降低鱼塘流出物中的溶解磷酸盐浓度。进行了添加合成磷酸盐溶液和鱼塘流出物的批次实验，以确定吸附平衡等温线和动力学，以及确定Phoslock从这些溶液中去除磷酸盐的效率。在添加合成磷酸盐的溶液中，平均最大磷酸盐吸附容量为92毫克Phoslock/毫克磷酸盐去除量。从鱼塘流出物中完全去除磷酸盐时，发现Phoslock与磷酸盐去除量的比例为50、100和200毫克Phoslock/毫克磷酸盐去除量，其中较高剂量的Phoslock导致更快的去除速率（在前150分钟内去除94%）。这些结果表明，膨润土-镧粘土可用于设计从鱼塘流出物中高效去除磷酸盐的处理工艺。
