Influence of Reduction Agent of SSI on its Cadmium Removal from Wastewater

Abstract:

Spherical sponge iron (SSI) with high activity and intension could be prepared through direct reduction by charcoal or hydrogen. The capability of cadmium removal by SSI was investigated in. It was suggested that the reaction of SSI reduced by hydrogen was higher than that reduced by charcoal, and the increasing rate of pH and cadmium removal in solution by SSI reduced by hydrogen was higher than that reduced by charcoal. Moreover, cadmium removal percentage by SSI reduced with hydrogen was much higher than that reduced by charcoal. When the original concentration of cadmium was 50mg/L, cadmium removal by SSI appeared to be the pseudo-first-order reaction because the reaction order was from 0.861 to 0.984. The apparent reaction rate constant of cadmium removal by SSI reduced with charcoal was 0.586 h-1. While hydrogen was utilized as reduction agent, the apparent reaction rate constant of cadmium removal was increased by 7.3 and 13.7 times.

• Periodical: Applied Mechanics and Materials (Volume 251)
• Pages: 406-410
• DOI: https://doi.org/10.4028/www.scientific.net/AMM.251.406
• Online since: December 2012
• Authors: Jun Guo Li, Yan Shi, Na Bi
• Keywords: Cadmium (Cd), Reduction Agent, Removal, Spherical Sponge Iron (SSI)

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