Effect of ferrous sulfate modified sludge biochar on the mobility, speciation, fractionation and bioaccumulation of vanadium in contaminated soil from a mining area

Aihemaiti，Aikelaimu1,2; Chen，Jingjing1; Hua，Yunhui1; Dong，Chunling1; Wei，Xuankun1; Yan，Feng1,3; Zhang，Zuotai1,3

2022-09-05

10.1016/j.jhazmat.2022.129405

JOURNAL OF HAZARDOUS MATERIALS   Impact Factor & Quartile

0304-3894

1873-3336

In contaminated soil, pristine biochar has poor applicability for immobilizing vanadium (V), which mainly exists as oxyanions in soil. To elucidate the immobilization potential and biotic/abiotic stabilizing mechanisms of a ferrous sulfate (FS)-modified sludge biochar in a V-contaminated soil from a mining area, we investigated the effects of biochar addition on the soil characteristics, growth of alfalfa, leachability, bioavailability, speciation, and fractionation of V, and changes in the microbial community structure and metabolic response. The results showed that the water extractable, acid-soluble (F1), and pentavalent fractions of V in soil decreased by up to 99 %, 95 %, and 55 %, respectively, whereas the reducible and (F2) oxidizable (F3) fractions increased by up to 45 % and 76 %, respectively. After the soil was treated with the FS-modified biochar for 90 d, the V concentration in the roots and shoots of alfalfa (Medicago sativa L.) decreased by up to 81.5 % and 96 %, respectively. The changes in the speciation, fractionation, and efficient immobilization of V in the studied soil were due to the combined effects of the biochar-induced decrease in soil pH, adsorption and precipitation by elevated iron concentrations, reduction and complexation due to an increase in the organic matter content, and microbial reduction by Proteobacteria.

Ferrous sulfate modification Immobilization mechanism Sludge biochar Speciation Vanadium

SCI ; EI

English

First ; Corresponding

National Key Research and Development Program of China[2018YFC1902904];Basic and Applied Basic Research Foundation of Guangdong Province[2021A1515010148];National Natural Science Foundation of China[2200810451772141];

Engineering ; Environmental Sciences & Ecology

Engineering, Environmental ; Environmental Sciences

WOS:000833541100003

ELSEVIER

20222612269464

Biochemistry ; Plants (botany) ; Soil pollution ; Soils ; Vanadium compounds

Soils and Soil Mechanics:483.1 ; Biochemistry:801.2

ENGINEERING

2-s2.0-85132507513

Scopus

1.Guangdong Provincial Key Laboratory of Soil and Groundwater Pollution Control,School of Environmental Science and Engineering,Southern University of Science and Technology,Shenzhen,518055,China
2.Academy for Advanced Interdisciplinary Studies,Southern University of Science and Technology,Shenzhen,518055,China
3.The Key Laboratory of Municipal Solid Waste Recycling Technology and Management of Shenzhen City,Southern University of Science and Technology,Shenzhen,518055,China

Aihemaiti，Aikelaimu,Chen，Jingjing,Hua，Yunhui,et al. Effect of ferrous sulfate modified sludge biochar on the mobility, speciation, fractionation and bioaccumulation of vanadium in contaminated soil from a mining area[J]. JOURNAL OF HAZARDOUS MATERIALS,2022,437.

Aihemaiti，Aikelaimu.,Chen，Jingjing.,Hua，Yunhui.,Dong，Chunling.,Wei，Xuankun.,...&Zhang，Zuotai.(2022).Effect of ferrous sulfate modified sludge biochar on the mobility, speciation, fractionation and bioaccumulation of vanadium in contaminated soil from a mining area.JOURNAL OF HAZARDOUS MATERIALS,437.

Aihemaiti，Aikelaimu,et al."Effect of ferrous sulfate modified sludge biochar on the mobility, speciation, fractionation and bioaccumulation of vanadium in contaminated soil from a mining area".JOURNAL OF HAZARDOUS MATERIALS 437(2022).