Investigating the adsorption behavior and the relative distribution of Cd2+ sorption mechanisms on biochars by different feedstock. (August 2018)

• Record Type: Journal Article
• Authors: Wang, Rong-Zhong; Huang, Dan-Lian; Liu, Yun-Guo; Zhang, Chen; Lai, Cui; Zeng, Guang-Ming; Cheng, Min; Gong, Xiao-Min; Wan, Jia; Luo, Hao
• Is Part Of: Bioresource technology. Volume 261(2018)
• Page Start: 265
• Page End: 271
• Publication Date: 2018-08
• Subjects: Biochar -- Cadmium -- Adsorption mechanism -- Feedstock -- Heavy metal; Biomass -- Periodicals; Biomass energy -- Periodicals; Bioremediation -- Periodicals; Agricultural wastes -- Periodicals; Factory and trade waste -- Periodicals; Organic wastes -- Periodicals; Bioénergie -- Périodiques; Déchets agricoles -- Périodiques; Déchets industriels -- Périodiques; Déchets organiques -- Périodiques; Déchets (Combustible) -- Périodiques; 662.88
• DOI: 10.1016/j.biortech.2018.04.032
• Languages: English
• ISSNs: 0960-8524

Abstract

Highlights: Pig manure derived biochars (PBCs) have the best adsorption capacity for Cd 2+ . The contribution of involved Cd 2+ removal mechanism varied with feedstock. Cd 2+ -π interaction was the predominant mechanism for Cd 2+ removal on biochars. The ash content play an important role in the removal of heavy metal by PBCs. Abstract: The objective of this study was to investigate the adsorption behavior and the relative distribution of Cd 2+ 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 Cd 2+, the extra adsorption capacity of PBCs mainly attributed to the precipitation or cation exchange, which played an important role in the removal of Cd 2+ by PBCs. The contribution of involved Cd 2+ removal mechanism varied with feedstock due to the different components and oxygen-containing functional groups. Cd 2+ -π interaction was the predominant mechanism for Cd 2+ 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.