Study of Iron-Carbon Micro-Electrolysis Degrading Dyeing Effluent by Appending Transition Metals and Rare Earths

Abstract:

The paper aims to explore influence of elements of transition metal (TM) and rare earth (RE) on iron-carbon micro-electrolysis for dyeing effluent degradation. There is evidence that there aren't many reports about it in domestic literature. The paper analysed the morphologies of surfaces of irons and activated carbons and designed the orthogonal experiments. Next was discussion for related influence factors. It deduced the mechanism that TMs and REs assist zero-valent iron (Fe⁰) catalysing degradation of dyeing effluent. It is based on following explanation. Cations of manganese and cobalt easily penetrate Fe⁰ lattices, but doesn't Ce⁴⁺ because of larger radius. Thus Ce⁴⁺ is weaker than Mn²⁺ and Co²⁺ for improving Fe⁰ activity. Furthermore, because the valence electron structure of Mn²⁺ is more stable than that of Co²⁺, Mn²⁺ is more efficient to assist Fe⁰ degrading dyeing effluent than Co²⁺. Therefore, the ranking of affecting Fe⁰ activity from greatest to smallest is Mn²⁺, Co²⁺ and Ce⁴⁺.

• Periodical: Advanced Materials Research (Volume 1021)
• Pages: 240-244
• DOI: https://doi.org/10.4028/www.scientific.net/AMR.1021.240
• Online since: August 2014
• Authors: Ju Chi Kuang*
• Keywords: Activated Carbon, Dyeing Effluent, Iron-Carbon Micro-Electrolysis, Rare Earth (RE), Transition Metal (TM), Zero-Valent Iron (Fe⁰)

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