School of Civil Engineering, Engineering Campus, Universiti Sains Malaysia, 14300 Nibong Tebal, Penang, Malaysia.
J Hazard Mater. 2011 Jun 15;190(1-3):582-7. doi: 10.1016/j.jhazmat.2011.03.087. Epub 2011 Mar 30.
Landfill leachate is a heavily polluted and a likely hazardous liquid that is produced as a result of water infiltration through solid wastes generated industrially and domestically. This study investigates the potential of using psyllium husk as coagulant and coagulant aid for the treatment of landfill leachate. Psyllium husk has been tested as primary coagulant and as coagulant aid with poly-aluminum chloride (PACl) and aluminum sulfate (alum). As primary coagulant, the optimum dosage and pH for PACl were 7.2 and 7.5 g/L, respectively, with removal efficiencies of 55, 80 and 95% for COD, color and TSS, respectively. For alum, the optimum conditions were 11 g/L alum dosage and pH 6.5 with removal efficiencies of 58, 79 and 78% for COD, color and TSS, respectively. The maximum removal efficiencies of COD, color and TSS were 64, 90 and 96%, respectively, when psyllium husk was used as coagulant aid with PACl. Based on the results, psyllium husk was found to be more effective as coagulant aid with PACl in the removal of COD, color and TSS as compared to alum. Zeta potential test was carried out for leachate, PACl, alum and psyllium husk before and after running the jar test to enhance the results of the jar test experiments.
垃圾渗滤液是一种污染严重且可能具有危害性的液体，是工业和家庭产生的固体废物中的水渗透的结果。本研究调查了利用车前子壳作为混凝剂和助凝剂来处理垃圾渗滤液的潜力。车前子壳已被测试为聚合氯化铝（PACl）和硫酸铝（明矾）的主要混凝剂和助凝剂。作为主要混凝剂，PACl 的最佳剂量和 pH 值分别为 7.2 和 7.5 g/L，COD、颜色和 TSS 的去除效率分别为 55%、80%和 95%。对于明矾，最佳条件是 11 g/L 明矾剂量和 pH 值 6.5，COD、颜色和 TSS 的去除效率分别为 58%、79%和 78%。当车前子壳作为助凝剂与 PACl 一起使用时，COD、颜色和 TSS 的最大去除效率分别为 64%、90%和 96%。根据结果，与明矾相比，车前子壳作为 PACl 的助凝剂在去除 COD、颜色和 TSS 方面更有效。在进行 jar 试验之前和之后，对渗滤液、PACl、明矾和车前子壳进行了动电电位测试，以增强 jar 试验实验的结果。
