【摘要】 近些年,铅污染已成为威胁人类健康的十大类污染物之一,越来越引起公众的关注,本文主要通过p H影响实验、Al投加量实验、Mg²⁺浓度影响实验及Pb离子表征实验,研究镁铝复合氢氧化物对于水体中铅的去除情况。研究发现:p H是镁铝复合氢氧化物去除Pb离子的关键影响因素,聚合度较高的Al₁₃是一种高效絮凝剂,在去除效果上Al₁₃优于Al Cl₃,实验溶液中Mg²⁺含量为24.0 mg/L时,达到较好的去除Pb离子效果,镁铝复合沉淀物呈无定形形态,有较大的比表面积,结晶度较好,使去除重金属离子的效率得到进一步提高。更多还原

【Abstract】 In recent years,lead pollution has become one of the ten major pollutants threatening human health,which has attracted more and more public attention.This paper mainly studies the effect of Mg-Al complex hydroxides in removing lead from water through several experiments of p H,Al dosage,Mg²⁺concentration and Pb ion characterization.It is found that p H is the key factor affecting the removal of Pb ions by Mg-Al complex hydroxides.Al₁₃with high degree of polymerization is a highly effective flocculant with removal effect better than Al Cl₃.When the content of Mg²⁺in the experimental solution is 24.0 mg/L,it can achieve a better removal effect of Pb ions.The Mg-Al composite precipitates have amorphous morphology,larger specific surface area and better crystallinity,which further improve the removal efficiency of heavy metal ions.更多还原