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Updated: Jan 19, 2026

Preparation of Expanded Chitin Foams and their Use in the Removal of Aqueous Copper
Published on: February 27, 2021
Chloro-phosphate impregnated biochar prepared by co-precipitation for the lead, cadmium and copper synergic
Rui Deng1, Danlian Huang1, Jia Wan1
1College of Environmental Science and Engineering, Hunan University, Changsha, Hunan 410082, China; Key Laboratory of Environmental Biology and Pollution Control (Hunan University), Ministry of Education, Changsha, Hunan 410082, China.
Abstract:
This work evaluated the possibility of lead (Pb2+), cadmium (Cd2+) and copper (Cu2+) ions synergic scavenging by a chloro-phosphate impregnated biochar (CPBC) from aqueous solution. Adsorption experiments displayed that the adsorption capacity of heavy metals by CPBC can be improved better compared with the pristine biochar (BC). The X-ray diffraction (XRD) analysis further demonstrated that the precipitation of Pb5(PO4)3Cl, Cd5(PO4)3Cl and Cu3(PO4)3 might be responsible for Pb2+, Cd2+ and Cu2+ scavenging. The competitive adsorption exhibited that Pb2+, Cd2+ and Cu2+ would compete for the same adsorption sites of CPBC when they coexisted and the adsorption affinity of CPBC was observed in the following order: Pb2+ > Cd2+ > Cu2+. The available phosphorus results suggested that the combination of biochar with phosphate materials can both improve the adsorption performance and reduce the risk of eutrophication by using phosphate materials which can provide a promising application for multiple heavy metals scavenging.
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