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Natural diatomite as an effective adsorbent for heavy metals in water and wastewater treatment (a batch study)

机译：天然硅藻土作为水和废水处理中重金属的有效吸附剂（批量研究）

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This study presents an evaluation of Egyptian diatomite as a low cost adsorbent for the removal of heavy metal under different conditions (pH, weight of diatomite and contact time). The adsorption of heavy metals was investigated under various pH values ranged from 2 to 8 at 25°C. The obtained results indicate that at low pH (2–4), the removal efficiency of diatomite for heavy metal increased slightly as the pH, adsorbent dose and contact time increased, while at pH>4, the percentage of metal ions adsorbed decreased with increasing pH due to precipitation of heavy metals. At pH equal 4, with using 2gL?1of diatomite and 75min as contact time, the maximum adsorption capacity of diatomite was obtained. The high adsorption capacity of diatomite makes it a suitable low cost material for the removal of different heavy metals from aqueous solutions.
机译：这项研究对埃及硅藻土作为一种低成本吸附剂进行了评估，该吸附剂用于在不同条件（pH，硅藻土重量和接触时间）下去除重金属。在25°C下在2至8的各种pH值下研究了重金属的吸附。获得的结果表明，在低pH（2-4）下，硅藻土对重金属的去除效率随pH，吸附剂剂量和接触时间的增加而略有增加，而在pH> 4时，金属离子的吸附百分比随增加而降低。由于重金属沉淀导致的pH值。在pH等于4的条件下，以2gL？1的硅藻土和75分钟的接触时间，获得了最大的硅藻土吸附能力。硅藻土的高吸附能力使其成为从水溶液中去除不同重金属的合适低成本材料。

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