| Literature DB >> 29673995 |
Rong-Zhong Wang1, Dan-Lian Huang2, Yun-Guo Liu1, Chen Zhang1, Cui Lai1, Guang-Ming Zeng1, Min Cheng1, Xiao-Min Gong1, Jia Wan1, Hao Luo1.
Abstract
The objective of this study was to investigate the adsorption behavior and the relative distribution of Cd2+ sorption mechanisms on biochars by different feedstock. Bamboo biochars (BBCs), corn straw biochars (CBCs) and pig manure biochars (PBCs) were prepared at 300-700 °C. Adsorption results showed PBCs have the best adsorption capacity for Cd2+, the extra adsorption capacity of PBCs mainly attributed to the precipitation or cation exchange, which played an important role in the removal of Cd2+ by PBCs. The contribution of involved Cd2+ removal mechanism varied with feedstock due to the different components and oxygen-containing functional groups. Cd2+-π interaction was the predominant mechanism for Cd2+ removal on biochars and the contribution proportion significantly decreased from 82.17% to 61.83% as the ash content increased from 9.40% to 58.08%. Results from this study may suggest that the application of PBC is a feasible strategy for removing metal contaminants from aqueous solutions.Entities:
Keywords: Adsorption mechanism; Biochar; Cadmium; Feedstock; Heavy metal
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Year: 2018 PMID： 29673995 DOI： 10.1016/j.biortech.2018.04.032
Source DB: PubMed Journal: Bioresour Technol ISSN： 0960-8524 Impact factor: 9.642