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Jiangxi Nonferrous Metals Society
ISSN：1674-9669
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CODEN YJKYA9
Volume 4 Issue 3
Jun.  2013
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DING Li-chao, CHEN Yun-nen, CHAI Li-yuan. The treatment of low concentration arsenic water by microwave modified spent grains[J]. Nonferrous Metals Science and Engineering, 2013, 4(3): 73-76. DOI: 10.13264/j.cnki.ysjskx.2013.03.017
Citation: DING Li-chao, CHEN Yun-nen, CHAI Li-yuan. The treatment of low concentration arsenic water by microwave modified spent grains[J]. Nonferrous Metals Science and Engineering, 2013, 4(3): 73-76. DOI: 10.13264/j.cnki.ysjskx.2013.03.017
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The treatment of low concentration arsenic water by microwave modified spent grains

  • School of Resource and Environmental Engineering, Jiangxi University of Science and Technology, Ganzhou 341000, China

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  • Received Date: October 30, 2012
  • Published Date: June 29, 2013
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    • Abstract
  • The discharge of wastewater containing heavy metals is one of the major security risks for drinking water. The heavy-metal polluted waste water treatment has long been a focus for environmental protection researchers. The new Standard for Drinking Water Quality (GB5749-2006) reduces arsenic concentration from 0.05 mg/L to 0.01 mg/L. This paper studies the treatment of low concentration arsenic (Ⅲ) water, arsenic being a representative anion in industrial wastewater by applying spent grains modified by microwave as biosorbent. The optimal modified conditions of spent grains were low-fire microwave for 7 min. Arsenic removal rate reaches 99.4 % in the waste water (pH=9, modified spent grains 10 g/L, initial arsenic concentration 0.5 mg/L, biosorption reaction 30 min). The arsenic adsorption kinetics of microwave modified spent grains conforms to quasi-second kinetics equation.
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