Biochar aging alters the bioavailability of cadmium and microbial activity in acid contaminated soils

被引：37

作者：

Bandara, Tharanga ^{[1
]}

Franks, Ashley ^{[2
,3
]}

Xu, Jianming ^{[4
,5
]}

Chathurika, J. B. A. J. ^{[1
]}

Tang, Caixian ^{[1
]}

机构：

[1] La Trobe Univ, Ctr AgriBiosci, Dept Anim Plant & Soil Sci, Melbourne Campus, Bundoora, Vic 3086, Australia

[2] La Trobe Univ, Dept Physiol Anat & Microbiol, Melbourne Campus, Bundoora, Vic 3086, Australia

[3] La Trobe Univ, Ctr Future Landscapes, Melbourne Campus, Bundoora, Vic 3086, Australia

[4] Zhejiang Univ, Coll Environm & Resource Sci, Inst Soil & Water Resources & Environm Sci, 866 Yuhangtang Rd, Hangzhou 310058, Peoples R China

[5] Zhejiang Univ, Zhejiang Prov Key Lab Agr Resources & Environm, 866 Yuhangtang Rd, Hangzhou 310058, Peoples R China

来源：

JOURNAL OF HAZARDOUS MATERIALS | 2021年 / 420卷

关键词：

Cd bioaccumulation; Dissolved organic C; Feedstock type; Metabolic quotient; pH fluctuation; Soil amendment; DISSOLVED ORGANIC-MATTER; ADSORPTION BEHAVIOR; SURFACE; CD; MOBILITY; BIOMASS; PH; IMMOBILIZATION; MINERALIZATION; ACCUMULATION;

D O I：

10.1016/j.jhazmat.2021.126666

中图分类号：

X [环境科学、安全科学];

学科分类号：

08 ; 0830 ;

摘要：

The effects of biochar aging on heavy-metal bioavailability and microbial activity are not fully understood. This study determined the effect over 270 days of poultry-litter biochar (PBC) and sugar-gum-wood biochar (SBC) on the bioavailability of Cd and microbial activity in acidic soils differing in organic matter content. Soil basal and substrate-induced respirations, microbial properties, Cd bioavailability and plant Cd bioaccumulation were evaluated at 1, 30, 90 and 270 days. The addition of PBC decreased Cd bioaccumulation by 81% and 85% while SBC decreased bioaccumulation by 47% and 56% in high (Chromosol) and low (Sodosol) organic matter soils, respectively, at Day 1. By Day 270, Cd bioaccumulation significantly (P < 0.05) increased in SBC-amended soils but decreased in PBC-amended soils. The addition of PBC increased both basal and substrate-induced microbial respirations compared to the other treatments over 270-day aging. However, SBC increased microbial biomass C compared to the PBC after Day 30. Aging decreased microbial respiration and biomass C in biochar-amended soils. It is concluded that Cd bioaccumulation increased in SBC-amended soils during aging whereas the PBC decreased Cd bioaccumulation and that the selection of biochar is important to enhance remediation efficiency in the long term.

引用

页数：10

共 64 条

[1] Effect of organic matter and salinity on ethylenediaminetetraacetic acid - extractable and solution species of cadmium and lead in three agricultural soils [J].