Remediation of lead-contaminated soil with non-toxic biodegradable natural ligands extracted from soybean
- Title
- Remediation of lead-contaminated soil with non-toxic biodegradable natural ligands extracted from soybean
- Author
- 이용우
- Keywords
- lead; remediation; soybean; soil; biodegradable
- Issue Date
- 2012-04
- Publisher
- Selper Ltd.
- Citation
- Environmental Technology (United Kingdom), v. 33, NO. 21, Page. 2415-2420
- Abstract
- Bench-scale soil washing studies were performed to evaluate the potential application of non-toxic, biodegradable extracted soybean-complexing ligands for the remediation of lead-contaminated soils. Results showed that, with extracted soybean-complexing ligands, lead solubility extensively increased when pH of the solution was higher than 6, and approximately 10% (500 mg/kg) of lead was removed from a rifle range soil. Two potential primary factors controlling the effectiveness of lead extraction from lead-contaminated soils with natural ligands are adsorption of extracted aqueous lead ions onto the ground soybean and the pH of the extraction solution. More complexing ligands were extracted from the ground soybean as the reaction pH increased. As a result, significantly higher lead extraction efficiency was observed under basic environments. In addition, less adsorption onto soybean was observed when the pH of the solution was higher than 7. Among two available Lewis base functional groups in the extracted soybean-complexing ligands such as carboxylate and the alpha-amino functional groups, the non-protonated alpha-amino functional groups may play an important role for the dissolution of lead from lead-contaminated soil through the formation of soluble lead-ligand complexes.
- URI
- https://www.tandfonline.com/doi/full/10.1080/09593330.2012.670270https://repository.hanyang.ac.kr/handle/20.500.11754/184170
- ISSN
- 0959-3330;1479-487X
- DOI
- 10.1080/09593330.2012.670270
- Appears in Collections:
- COLLEGE OF SCIENCE AND CONVERGENCE TECHNOLOGY[E](과학기술융합대학) > CHEMICAL AND MOLECULAR ENGINEERING(화학분자공학과) > Articles
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