Effects of Transition Metals and Rare Earths on Iron-Carbon Micro Electrolysis Degrading Dyeing Effluent

Abstract:

The principle and methodology of effluent treatment by iron-carbon micro electrolysis were introduced in the paper. Then design of the orthogonal experiments for dyeing effluent treatment was formulated. Discussion of influences of related factors on effluent treatment followed. Results were got after the detailed analysis. Therefore, we deduced the mechanism that the cations of Transition Metal (TM) and rare earth (RE) assist of zero-valent irons catalyzing degradation of dyeing effluent. The mechanism is formed based on the following explanation. Cations of manganese and cobalt easily penetrate Fe⁰ lattices, while Ce⁴⁺ cations do it difficultly because of their larger radius. Thus Ce⁴⁺ is weaker than both of Mn²⁺ and Co²⁺ for helping zero-valent irons to improve their activity. Furthermore, because the valence electron structure of Mn²⁺ is more stable than that of Co²⁺, Mn²⁺ is better for assisting zero-valent iron catalysis of degradation of dyeing effluent than Co²⁺. Therefore, ranking of influence for zero-valent iron catalysis activity from greatest to smallest is Mn²⁺, Co²⁺ and Ce⁴⁺.

• Periodical: Advanced Materials Research (Volumes 1010-1012)
• Pages: 928-933
• DOI: https://doi.org/10.4028/www.scientific.net/AMR.1010-1012.928
• Online since: August 2014
• Authors: Ju Chi Kuang, Xiao Gang Chen, Min Hua Chen
• Keywords: Dyeing Effluent, Iron-Carbon Micro Electrolysis, Rare Earth (RE), Transition Metal (TM), Zero-Valent Iron

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