To explore the remediation mechanism and effect of biochar and KH2PO4 on soils contaminated with heavy metal ions Hg2+, Cd2+ and Pb2+

被引：2
作者：
Wu, Dun [1 ,2 ,3 ,4 ]
Lu, Jianwei [1 ]
Wu, Jian [1 ]
Li, Bo [1 ]
机构：
[1] Anhui Jianzhu Univ, Anhui Prov Intelligent Underground Explorat & Env, Sch Civil Engn, Hefei, Anhui, Peoples R China
[2] State Key Lab Safety & Hlth Met Mines, Maanshan, Anhui, Peoples R China
[3] Anhui Jianzhu Univ, Anhui Prov Intelligent Underground Explorat & Env, Sch Civil Engn, Hefei 23060, Anhui, Peoples R China
[4] State Key Lab Safety & Hlth Met Mines, Maanshan 243000, Anhui, Peoples R China
来源：
JOURNAL OF ENVIRONMENTAL SCIENCE AND HEALTH PART A-TOXIC/HAZARDOUS SUBSTANCES & ENVIRONMENTAL ENGINEERING | 2023年 / 58卷 / 13期
关键词：
Soil; heavy metals; biochar; KH2PO4; remediation; SORPTION;
D O I：
10.1080/10934529.2023.2290421
中图分类号：
X [环境科学、安全科学];
学科分类号：
08 ; 0830 ;
摘要：
In this study, wheat straw-derived biochar was prepared by setting a temperature of 400 degrees C under an oxygen-limited environment using the technique of "programmed temperature increase control". The results showed that the biochar had a strong adsorption capacity for Hg2+, Cd2+ and Pb2+ ions, and the adsorption pattern was Hg2+>Cd2+>Pb2+. There was a competitive adsorption effect during the coexistence of the ions. The results of the soil remediation tests showed that the effects of biochar on soil physicochemical properties and heavy metal distribution was generally greater than those of KH2PO4 in single or combined contaminated soil. The adsorption effect of heavy metal ions in soil was the best in the case of mixed additions. The results can provide a scientific basis for the treatment of heavy metal contaminated soil with wheat straw biochar in the future.
引用
收藏
页码：1001 / 1013
页数：13
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