Abstract：
:Heavy metal contamination in agricultural soils has become a serious environmental concern due to their generally high mobility and toxic effects on plants and food security. An incubation study was conducted to assess the effectiveness of biochar (BC), zeolite (ZE) and rock phosphate (RP) stabilizers on the immobilization of cadmium (Cd) in contaminated soils. Various extraction techniques were carried out: a sequential extraction procedure, the European Community Bureau of Reference (BCR), the toxicity characteristics leaching procedure (TCLP) and extraction with ammonium nitrate. In addition, Cd adsorption by these materials was observed using Langmuir and Freundlich isotherms. The results showed that with an increase in soil pH the exchangeable fraction of Cd in soil was significantly reduced by 28%-29.4%, 9%-13% and 4%-14% for BC, ZE, and RP, respectively. According to the Langmuir adsorption isotherm, BC-amended soil showed a higher adsorption capacity (Qm) of Cd from 8.38 to 19.85 mg g-1. Overall, BC offered better results when compared to other amendments.
journal_name
Bull Environ Contam Toxicoljournal_title
Bulletin of environmental contamination and toxicologyauthors
Bashir S,Rizwan MS,Salam A,Fu Q,Zhu J,Shaaban M,Hu Hdoi
10.1007/s00128-018-2310-zsubject
Has Abstractpub_date
2018-05-01 00:00:00pages
727-732issue
5eissn
0007-4861issn
1432-0800pii
10.1007/s00128-018-2310-zjournal_volume
100pub_type
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