The Studies of Adsorption of Heavy Metal Ions of Lead and Copper by Distillers' Grains

Abstract:

The absorption of Cu²⁺ and Pb²⁺ in the heavy metal wastewater by distillers' grains can not only solve the problem of environmental pollution, but also change distillers' grains waste into resource. Structural characteristics of distillers' grains and its adsorption behaviors for the heavy metal ions of Cu²⁺ and Pb²⁺ were studied and effects of various parameters including pH, temperature, distillers' grains dose, initial Cu²⁺ and Pb²⁺ concentration and absorbed time on the absorption of Pb²⁺ and Cu²⁺ were evaluated. Sorption isotherms were also investigated. Results show that the rough surface, loose internal structure and hydroxy and amide groups of the distillers' grains are beneficial to the adsorption of Cu²⁺ and Pb²⁺ in the wastewater. The removal rate of the distillers' grains for Pb²⁺ (20.00 mg L−1) and Cu²⁺ (20.00 mg L−1) are, respectively, 96.72% and 87.70% under optimized conditions. The equilibrium sorption data are well demonstrated by Langmuir model.

• Periodical: Materials Science Forum (Volume 695)
• Pages: 77-80
• DOI: https://doi.org/10.4028/www.scientific.net/MSF.695.77
• Online since: July 2011
• Authors: Juan Feng, Xiao Yan Lin, Xue Gang Luo, Jia Quan Rao, Chun Yan Zhang
• Keywords: Adsorption, Cu²⁺, Distillers' Grains (DG), Pb²⁺

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