The Role of Nanoporous Biochars Functional Groups for Immobilization of Heavy Metals in Aqueous Solution

Abstract:

The affinity of nanoporous biochars functional groups for immobilization Cu, Zn, and Pb in aqueous solution has been studied. BET results revealed the nanoporous structure of the chars. Batch experiments have been designed and performed.The results indicated remarkable sorption capacity in case of each char: in a multi-metal system, B1, B2, and B3 adorbed 24.39, 23.61, 35.69 mg/g copper, 63.36, 90.96, 95.36 mg/g lead, and 20.16, 21.26, and 25.44 mg/g zinc, respectively. To find out the sorption mechanism with a post-sorption FTIR analysis over the biochars has been made. The results suggest the possible competitive immobilization mechanism as Cu being mainly organically bounded to amino, hydroxyl and carboxyl functional groups, Pb forming insoluble hydroxide, phosphate or carbonate, and Zn being mostly sorbed in the residual fraction.

• Periodical: Materials Science Forum (Volume 860)
• Pages: 43-46
• DOI: https://doi.org/10.4028/www.scientific.net/MSF.860.43
• Online since: July 2016
• Authors: Ahmad Khodadadi Darban, Hoda Arabyarmohammadi, Mahmoud Abdollahy, Bita Ayati
• Keywords: Biochar, Immobilization, Nanoporous, Paper Residues, Pulp

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