摘要
以广东省某河道底泥为对象,研究了相关河段的底泥中重金属形态分布特征及防治措施。通过考察不同固化/稳定化药剂对受复合重金属污染的河道底泥的固化/稳定化效果,最终选定"水泥(投加量10%)+Fe^(2+)+(Fe(SO_(4))_(2)投加量10%)"为此次研究的最佳药剂选择和配比。样品底泥的pH值上升,铜、镍、镉、铅及砷的浸出浓度显著下降,通过Tessier的五步连续提取程序分析底泥中重金属形态变化,铜、镉、镍及铅的残渣晶格结合态(Ts5)升高,而砷的铁锰氧化物结合态(Ts3)升高。
Taking the sediment of Beigang River in Guangdong Province as the research object,the speciation and distribution characteristics of heavy metals in the sediment of relevant reaches and the control measures were mainly studied.By investigating the solidification/stabilization effect of different solidifying/stabilizing agents on the river sediment polluted by compound heavy metals,the best agent selection and proportion for this studywas selected as“cement(10%)+Fe^(2+)+(FeSO_(4)10%)”.The pH value of the sediment increased,and the leaching concentrations of Cu,Ni,Cd,Pb and As decreased significantly.Through Tessiers five step continuous extraction program,the change of heavy metal speciation in sediment was analyzed.The residue lattice bound state(ts5)of copper,cadmium,nickel and lead increased,while the iron manganese oxide bound state(Ts3)of arsenic increased.
作者
罗浩
白帆
张高山
胡欣宇
郝阳
段磊
LUO Hao;BAI Fan;ZHANG Gao-shan;HU Xin-yu;HAO Yang;DUAN Lei(Chang'an University,Shaanxi Xi'an 710021;Guangdong Kaiyuan Environmental Technology Co.,Ltd.,Guangdong Dongguan 523000,China)
出处
《广州化工》
CAS
2021年第20期89-93,共5页
GuangZhou Chemical Industry
基金
大学生创新创业训练计划项目(201910710129)
国家自然科学基金项目(41877190,41372258)。
关键词
河道底泥
复合重金属污染
稳定化/固化技术
river sediment
compound heavy metal pollution
stabilization/solidification technology
