两种固化剂对湘潭锰矿区土壤中重金属的固化效应  

Solidification Effect of Two Curing Agents on Heavy Metals in Xiangtan Manganese Mine Area Soil

作　　者：熊子旗 刘希灵[1] 李志贤 李伟亚 曾星 XIONG Ziqi;LIU Xiling;LI Zhixian;LI Weiya;ZENG Xing(School of Resources and Safety Engineering,Central South University,Changsha 410083,Hunan,China;Hunan Province Key Laboratory of Coal Resources Clean-utilization and Mine Environment Protection,HunanUniversity of Science and Technology,Xiangtan 411201,Hunan,China)

机构地区：[1]中南大学资源与安全工程学院,湖南长沙410083 [2]湖南科技大学煤炭资源清洁利用与矿山环境保护湖南省重点实验室,湖南湘潭411201

出　　处：《黄金科学技术》2019年第5期762-769,共8页Gold Science and Technology

基　　金：国家自然科学基金“镉富集植物—农作物间作对农作物吸收镉的阻控效应及其机理研究”(编号:31400374)、“微生物—改性生物炭联合阻控玉米、大豆累积重金属锰的效应及机理研究”(编号:31671635);湖南省重点研发项目“生物联合阻控关键技术及其在锰污染农田中的应用”(编号:2017SK2385)联合资助

摘　　要：为探究生石灰(CaO)、羟基磷灰石(HAP)2种固化剂对湘潭锰矿区土壤中重金属锰(Mn)、铅(Pb)、铬(Cr)的固化效应,将2种固化剂以不同的施入量进行单一和组配固化处理,测定土壤中有效态Mn、Pb、Cr的含量并进行方差分析和相关性分析。结果表明:各固化处理均可极显著(p<0.01)降低土壤中有效态Mn、Pb的含量;对于土壤中有效态Cr,单一生石灰固化处理可极显著(p<0.01)降低其含量,而羟基磷灰石施入量为1%时方可使其含量降低80.40%,同时组配处理对Cr的固化效果也不理想。相关性分析表明:生石灰的施入量与土壤中有效态Mn含量呈极显著(p<0.01)负相关,羟基磷灰石的施入量与土壤中有效态Mn、Pb含量呈极显著(p<0.01)负相关。故2种试剂的单一和组配处理对湘潭锰矿区土壤中Mn、Pb有较好的固化效果,单一生石灰处理对湘潭锰矿区土壤中Cr有较好的固化效果。As an effective remediation method for heavy metal pollution of soil,solidification remediation technology has become more mature and been widely used due to its low investment,quick response,simple operation and other advantages.Xiangtan manganese mine had rich manganese reserves and greatly promoted the economic development of Xiangtan area.However,the exploitation of mineral resources and the disorder accumulation of manganese residues result in the environmental problems of soil heavy metal pollution in Xiangtan manganese mine area. In order to explore the solidification remediation effect of solidification remediation technology on heavy metals in soil of Xiangtan manganese mine area,in the experiment,quicklime (CaO)and hydroxyapatite(HAP)were selected as curing agents to study the curing effect of their single and combined treatments on manganese(Mn),lead(Pb)and chromium(Cr)in the soil of Xiangtan manganese mine area.The specific research process is as follows:First of all,the soil samples were taken from the surrounding land of Xiangtan manganese mine(27°78′N,112°47′E),the soil at the depth of 0~20 cm was collected from five different sites and mixed evenly,and then brought back to the laboratory,the relevant parameters of the soil and the contents of Mn,Pb and Cr in the soil were determined.Secondly,0.10 mol/L hydrochloric acid reagent was used to extract effective Mn,Pb and Cr from soil,and the content was determined.Thirdly,the effect of curing treatments on the content of available Mn,Pb and Cr in soil was explored through variance analysis and correlation analysis.The results manifested that the content of available Mn and Pb in soil could be decreased significantly(p<0.01)by all curing treatments.The single curing treatments of CaO could reduce the content of available Cr in soil significantly(p<0.01),and there was a significantly(p<0.01)negative correlation between the dosage of CaO and the content of available Mn in soil,the application dosage of HAP had a significantly (p<0.01)negative corre

关 键 词：湘潭锰矿区 重金属污染 生石灰 羟基磷灰石 单一处理 组配处理 

分 类 号：X53[环境科学与工程—环境工程]