Chromium Removal from Aqueous Solution by Microwave-Modified Phosphogypusum

Abstract:

The removal of chromium (VI) ions from aqueous solution by microwave-modified phosphogypsum was studied. The removal capacity of microwave-modified phosphogypsum for chromium (VI) ions was examined as a function of solution pH, contact time, adsorbent dosage. Before a series of the adsorption studies, phosphogypsum was pre-conditioned with microwave. It was observed that the adsorption of the chromium (VI) ions onto the phosphogypsum in the pH range of 2 and 11. The chromium (VI) adsorption process was described with the Langmuir and Freundlich theories, and the Freundlich model indicated the best fit to the adsorption process. Maximum adsorption capacity of microwave-modified phosphogypsum was found to be 3.126 mg g⁻¹. The results proved that the microwave-modified phoshogypsum is a suitable adsorbent for the removal of chromium (VI) ions from aqueous solution.

• Periodical: Advanced Materials Research (Volumes 955-959)
• Pages: 16-20
• DOI: https://doi.org/10.4028/www.scientific.net/AMR.955-959.16
• Online since: June 2014
• Authors: Ping Ning, Lei Shi, Yue Hong Yang*, Yang Cheng
• Keywords: Adsorption, Chromium Removal, Microwave-Modified, Phosphogypusum

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