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Updated: Feb 7, 2026

Quantification of Heavy Metals and Other Inorganic Contaminants on the Productivity of Microalgae
Published on: July 10, 2015
H2O2 treatment enhanced the heavy metals removal by manure biochar in aqueous solutions
1Biomass Energy Engineering Research Centre, School of Agriculture and Biology, Shanghai Jiao Tong University, 800 Dongchuan Road, Shanghai 200240, People's Republic of China; Key Laboratory of Urban Agriculture (South), Ministry of Agriculture, 800 Dongchuan Road, Shanghai 200240, People's Republic of China.
Abstract:
The physicochemical properties and adsorption capacities of yak manure biochar (SP350-YMB) and modified yak manure biochar by H2O2 (AC-YMB) were investigated. Results showed the oxygen content and the carboxyl group content of manure biochar increased by 63.4% and 101%, and the ash content decreased 42% after modification, respectively. Compared to SP350-YMB, the adsorption capacities of heavy metal ions (Pb2+, Cu2+, Cd2+ and Zn2+) were enhanced by AC-YMB in single-metal and multi-metal solutions. The maximum adsorption capacity of Pb2+ increased from 76.41mgg-1 by SP350-YMB to 169.57mgg-1 by AC-YMB based on Langmuir-Freundlich model in single-metal solutions. Pseudo-first and Pseudo-second-order model were used to predict the Pb2+ adsorption kinetics by AC-YMB. H2O2 modification reduced ash content and increased carboxyl content resulting in the major mechanism of heavy metal sorption shifting from precipitation with carbonate/phosphate to complexation with carboxyl. Results from this study indicated that H2O2 modified biochar could act as effective surface sorbent to remove heavy metals, but its ability to remove multi-metal ions needs to be carefully evaluated on an individual basis.
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