不同孔径活性炭对镉铅污染土壤的动态修复研究  

Study on Dynamic Remediation of Cadmium and Lead Contaminated Soil by Activated Carbon with Different Pore Sizes

作　　者：罗健豪 宋艳培 庞锡明 曾敏玲 简秀梅 LUO Jian-hao;SONG Yan-pei;PANG Xi-ming;ZENG Min-ling;JIAN Xiu-mei(Guagnzhou Panyu Institute of Agricultural Products Quality Supervision and Testing,Guangdong Guangzhou 511400;College of Materials and Energy,South China Agricultural University,Guangdong Guangzhou 510640,China)

机构地区：[1]广州市番禺区农产品质量监测所,广东广州511400 [2]华南农业大学材料与能源学院,广东广州510640

出　　处：《广州化工》2022年第24期141-144,159,共5页GuangZhou Chemical Industry

摘　　要：测定微孔活性炭(MICAC)、介孔活性炭(MECAC)和大孔活性炭(MACAC)的理化性质和吸附特性,以及三者对重金属污染土壤的淋溶和大田原位修复的动态影响。三种活性炭比表面积大小为MICAC>MECAC≥MACAC。经三种活性炭处理后的淋出液的Cd(Ⅱ)和Pb(Ⅱ)浓度分别降为0.18~0.21 mg/L和0.063~0.067 mg/L。活性炭对大田土壤中Cd(Ⅱ)Pb(Ⅱ)含量影响为:MECAC≥MICAC>MACAC>CK;90 d的大田原位修复,MICAC处理土壤的Cd(Ⅱ)和Pb(Ⅱ)含量分别较对照组土壤分别下降78.57%和80.57%。适当添加3%的MECAC能有效吸附土壤中的Cd(Ⅱ)和Pb(Ⅱ)。The physicochemical properties and adsorption characteristics of microporous activated carbon(MICAC), mesoporous activated carbon(MECAC) and macroporous activated carbon(MACAC) were determined, as well as the dynamic effects of the three activated carbons on the leaching and in situ remediation of heavy metal contaminated soil in the field. The specific surface area of the three activated carbons was MICAC>MECAC≥MACAC, and the concentrations of Cd(Ⅱ) and Pb(Ⅱ) in the leachate were reduced to 0.18~0.21 mg/L and 0.063~0.067 mg/L, respectively, after treatment with the three activated carbons. MACAC>CK;the Cd(Ⅱ) and Pb(Ⅱ) contents of MICAC-treated soil decreased by 78.57% and 80.57%, respectively, compared with the control soil at 90 d of in situ restoration in the field. The appropriate addition of 3% MECAC could effectively adsorb Cd(Ⅱ) and Pb(Ⅱ) from the soil.

关 键 词：活性炭 重金属 土壤 孔径 动态修复 

分 类 号：S156.2[农业科学—土壤学] X53[农业科学—农业基础科学]