MgCaAl-LDHs ternary hydrotalcite has great potential in treating wastewater con-taining heavy metal ions due to its wide material sources,low cost,high efficiency,strong ion ex-change ability,large specific surface area,not easy to agglomerate and environmental friendliness.Therefore,in an industrial sewage treatment plant of an industrial park with treatment capacity of 8 000 m3/d,the superstable mineralizer was used to conduct simulation and industrial tests to ex-plore its removal effect on heavy metal ions in sewage.The results showed that after 25 days of in-dustrial test,the superstable mineralizer had different removal effects on Cu,Zn,Ni,Pb,Cd,Mn and other heavy metal ions in sewage,and the removal rate of each element was closely related to the element content and the amount of superstable mineralizer added in the inlet.At the same time,after the addition of ultra-stable mineralizer in the nitrogen removal tank,all kinds of heavy metal ions in the sewage plant drainage meet the requirements of the national comprehensive discharge standard GB 18918―2002"Pollutant Discharge Standard for Urban Sewage Treatment Plants"Grade A Standard,which can realize the efficient and stable removal of heavy metal ions in sewage.
关键词
层状双金属氢氧化物/污水处理/去除率/重金属
Key words
MgCaAl-LDH/Treatment of polluted water/Removal/Heavy metal
维普
万方数据