期刊论文

Screening and Effect Analysis of Eluents Removing Heavy Metals from Paddy Soil

中文

水土保持学报

1009-2242

2019

33

4

321-328

10.13870/j.cnki.stbcxb.2019.04.045

国家重点研发计划项目(2017YFD0801105) 中央级科研院所基本科研业务费专项(Y2018LM18).

本校为第一机构

为分析不同淋洗剂在不同淋洗条件下对重金属淋洗效果的影响,采用振荡淋洗法对比研究4种淋洗剂(柠檬酸(CA)、酒石酸(TA)、乙二胺四乙酸二钠盐(EDTA)和氨三乙酸三钠盐(NTA))不同浓度、淋洗时间、pH和固液比对重金属复合污染农田土壤中Pb、Cd、Cu和Zn的淋洗效果及单因素最佳淋洗条件下土壤淋洗前后重金属不同形态含量的变化。结果表明,CA和TA的最佳淋洗浓度为0.3mol/L,EDTA和NTA为0.05 mol/L;CA和NTA的最佳淋洗时间为480 min,EDTA和TA为720 min;4种淋洗剂的最佳淋洗pH均为3,最佳固液比均为1∶20。单因素最佳淋洗条件下,EDTA对土壤重金属去除效果最佳,对Pb、Cd、Zn和Cu的去除率分别为67.4%,61.0%,13...

To study the removal effects of different eluents on heavy metals contaminated soil with different leaching conditions,a batch experiment was conducted to compare the effects of four eluents(citric acid (CA),tartaric acid(TA),ethylene diaminetetra acetic acid disodium salt(EDTA),and triacetintrisodium salt(NTA))on removing heavy metals(Pb,Cd,Cu and Zn)from a paddy soil at different concentrations, leaching time,pH values and solid-liquid ratios.Changes in fractions of heavy metals in soil before and after leaching with eluents were analyzed at ...