镁铝复合氢氧化物去除水体中铅离子的研究
|
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、Mg~(2+)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Al_(13)是一种高效絮凝剂,在去除效果上Al_(13)优于Al Cl_3,实验溶液中Mg~(2+)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。
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,Mg~(2+)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.Al_(13)with high degree of polymerization is a highly effective flocculant with removal effect better than Al Cl_3.When the content of Mg~(2+)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.
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,Mg~(2+)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.Al_(13)with high degree of polymerization is a highly effective flocculant with removal effect better than Al Cl_3.When the content of Mg~(2+)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.
引文
[1]曹斌,何松洁,夏建新.重金属污染现状分析及其对策研究[J].中央民族大学学报(自然科学版),2009,18(1):29-33.
[2]赵灿,高圣华,张岚.我国饮用水中污染物短期暴露健康风险参考值推导方法研究[J].环境卫生学杂志,2018,8(1):7-11.
[3]李发炎,胡章文.聚乙烯醇/镁铝双金属氢氧化物复合材料的合成与性能研究[J].安徽化工,2013,39(2):22-24.
[4]李国红.Al13凝聚絮凝特性初探[A].中国化学会应用化学专业委员会.中国化学会第八届水处理化学大会暨学术研讨会论文集[C].中国化学会应用化学专业委员会:中国化学会,2006:5.
[5]郑怀礼,高亚丽,蔡璐微,等.聚合氯化铝混凝剂研究与发展状况[J].无机盐工业,2015,47(2):1-5.
[6]张欢,程继夏,赵赟鑫.镁铝复合氢氧化物对于水体中砷的去除研究[J].北方环境,2011,23(10):121-123.
[7]张欢,赵赟鑫.羟基镁铝复合物对于水体中镉的去除研究[J].北方环境,2013,25(12):58-61.
[8]赵海东.结晶状铝十三的制备、表征及其絮凝特性研究[D].内蒙古:内蒙古大学,2005.
[9]Chengzhi Hu,Huijuan Liu,Jiuhui Qu.Coagulation Behavior of Aluminum Salts in Eutrophic Water:Significance of Al13Species and p H Control[J].Environ,Sci.Technol,2006,40:325-331.
[10]汤鸿霄.羟基聚合氯化铝的絮凝形态学[J].环境科学学报,1998(1):3-12.
[11]王玲玲,闫永胜,邓月华,等.铅离子印迹聚合物的制备、表征及其在水溶液中的吸附行为研究[J].分析化学,2009,37(4):537-542.
[12]臧树俊.Al/Mg2Si复合材料的制备与表征[D].兰州:兰州理工大学,2006.
[2]赵灿,高圣华,张岚.我国饮用水中污染物短期暴露健康风险参考值推导方法研究[J].环境卫生学杂志,2018,8(1):7-11.
[3]李发炎,胡章文.聚乙烯醇/镁铝双金属氢氧化物复合材料的合成与性能研究[J].安徽化工,2013,39(2):22-24.
[4]李国红.Al13凝聚絮凝特性初探[A].中国化学会应用化学专业委员会.中国化学会第八届水处理化学大会暨学术研讨会论文集[C].中国化学会应用化学专业委员会:中国化学会,2006:5.
[5]郑怀礼,高亚丽,蔡璐微,等.聚合氯化铝混凝剂研究与发展状况[J].无机盐工业,2015,47(2):1-5.
[6]张欢,程继夏,赵赟鑫.镁铝复合氢氧化物对于水体中砷的去除研究[J].北方环境,2011,23(10):121-123.
[7]张欢,赵赟鑫.羟基镁铝复合物对于水体中镉的去除研究[J].北方环境,2013,25(12):58-61.
[8]赵海东.结晶状铝十三的制备、表征及其絮凝特性研究[D].内蒙古:内蒙古大学,2005.
[9]Chengzhi Hu,Huijuan Liu,Jiuhui Qu.Coagulation Behavior of Aluminum Salts in Eutrophic Water:Significance of Al13Species and p H Control[J].Environ,Sci.Technol,2006,40:325-331.
[10]汤鸿霄.羟基聚合氯化铝的絮凝形态学[J].环境科学学报,1998(1):3-12.
[11]王玲玲,闫永胜,邓月华,等.铅离子印迹聚合物的制备、表征及其在水溶液中的吸附行为研究[J].分析化学,2009,37(4):537-542.
[12]臧树俊.Al/Mg2Si复合材料的制备与表征[D].兰州:兰州理工大学,2006.