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Effect of biochar aging and co-existence of diethyl phthalate on the mono-sorption of cadmium and zinc to biochar-treated soils.
- Source :
-
Journal of Hazardous Materials . Apr2021, Vol. 408, pN.PAG-N.PAG. 1p. - Publication Year :
- 2021
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Abstract
- In this study, the influence of the aging process of pig-(PB) and P. orientalis -(POB) derived biochars on the sorption capacity of the biochar-treated soils for cadmium (Cd) and zinc (Zn) with and without the co-existence of diethyl phthalate (DEP) was investigated. Additionally, the surface and internal characteristics of biochars were determined before and after their aging in soils. The PB-treated soil had a higher sorption capacity for Cd2+ and Zn2+ than the POB-treated soil. The sorption capacity of the biochar-treated soils for Cd2+ and Zn2+ increased with biochar application rates. After aging, the abundance of oxygen-containing functional groups on the biochar surface, and the pH and organic carbon content of the biochar-treated soils significantly increased, thereby improving the sorption capacity for Cd2+ and Zn2+. The sorption capacities of biochar-treated soils for Cd2+ and Zn2+ followed the order of 1-month aging > 6-month aging > fresh. The co-existence of DEP enhanced the sorption capacity of the fresh biochar-treated soils for Cd2+ and Zn2+, whereas this enhancing effect disappeared for the aged biochar treatments. Our findings provide insights into the interactions between mixed contaminants in biochar-amended soils and the long-term efficacy of biochar treatments on metal sorption to soils. ga1 • Aging process enhanced Cd2+ and Zn2+ sorption on biochar-treated soils. • Pig biochar was better than wood biochar in enhancing soil sorption of metals. • Diethyl phthalate (DEP) enhanced sorption of metals in biochar-treated soils. • However, DEP suppressed metal sorption in aged biochar-treated soils. [ABSTRACT FROM AUTHOR]
Details
- Language :
- English
- ISSN :
- 03043894
- Volume :
- 408
- Database :
- Academic Search Index
- Journal :
- Journal of Hazardous Materials
- Publication Type :
- Academic Journal
- Accession number :
- 148774535
- Full Text :
- https://doi.org/10.1016/j.jhazmat.2020.124850