Nuclear chemistry

Adsorption

Ecology

Biology

Ethylenediaminetetraacetic acid

Pyrolysis

Chromatography

Chelation

Cyclodextrin

Environmental remediation

Inorganic chemistry

Soil water

Soil remediation

Biochar

Organic chemistry

Political science

Environmental chemistry

Soil contamination

Contamination

Environmental science

Soil science

Amendment

Chemistry

Journal of Cleaner Production

Ethylenediaminetetraacetic acid crosslinked β-cyclodextrin modified biochar (BC-CDMW) was fast prepared by microwave-assisted one-pot process, and was applied to remediation of Cd and Pb contaminated soil. Batch adsorption studies showed that the BC-CDMW possessed superior adsorption performance with maximal monolayer Cd(II)/Pb(II) uptake of 39.56 or 208.36 mg/g spanning broad pH range of 2.0–6.0. Furthermore, by applying BC-CDMW dosage of 5%, labile Cd and Pb portions in soil were reduced from 74.91% to 56.61%–30.65% and 28.30% after simulated remediation of 30 days at 40% moisture content. In comparison with BC, the stable residue state content increased by 30.84% and 18.91% for Cd and Pb, respectively, by BC-CDMW treatment. Besides, the BC-CDMW was identified to implement Cd and Pb stabilization in soil via combined roles of electrostatic attraction, complexation and pore filling. Overall, this work suggested BC-CDMW as a high-performance amendment for heavy metals stabilization in soil.

Microwave-assisted one-pot synthesis of β-cyclodextrin modified biochar for stabilization of Cd and Pb in soil