摘要
本文以上海地区As污染土为研究对象,分析以上海为代表的沿海地区污染土壤的粒径分布情况以及As在不同粒径段内的存在形态的分布情况。研究采集了某化工退役场地上的含As污染土,以3、0.75、0.075、0.05 mm为节点,确定粒径分布。利用Tessier分析法对不同粒径段上As的五种形态的含量进行测定,得到不同粒径段的污染分布特征。研究得到,该污染土壤主要分布在0.075 mm以下,随着粒径范围的减小,其粒径的质量占比越高。As在不同粒径段内形态分布规律一致,以残渣态形态为主,解释了As在实际淋洗应用中效率不高的原因,As的淋洗应该着重考虑对残渣态的转化。
Based on Arsenic contaminated soil in Shanghai,this study tried to analyze the size grading and the speciation of Arsenic in different size grade.Arsenic contaminated soil was sampled from a decommissioned chemical plant site,and size grading analysis was made taking the nodes as 3,0.75,0.075,0.05 mm.Speciation in different size grade was analyzed by Tessier sequential extraction procedures.It was concluded that soil particles were mainly below 0.075 mm,and the mass proportion of particle size increased with the decrease of particle size range.The speciation of Arsenic was similar in each size grade,in the domination of residue fraction,due to the low washing removal rate of Arsenic.More consideration should be given to the transformation of residue fraction in leaching remediation for Arsenic contaminated soil.
作者
诸毅
姚振楠
Zhu Yi;Yao Zhennan(Shanghai Chengtou Environmental Ecological Remediation Technology Co.,Ltd.,Shanghai 200030,China)
出处
《广东化工》
CAS
2023年第14期158-160,共3页
Guangdong Chemical Industry
基金
上海城投(集团)有限公司科技创新计划项目:异位土壤淋洗设备研制(CTKY-PTRC-2021-002)。
关键词
AS
粒径分级
形态分析
残渣态
淋洗
arsenic
size grading
speciation
residue fraction
leaching remediation
作者简介
诸毅(1981-),男,江苏无锡人,硕士,主要研究方向为污染场地修复。
