Decolorization of Reactive Red K-2BP wastewater with sponge iron

摘要：

The decolorization of Reactive Red K-2BP wastewater with sponge iron was investigated through batch experiments. The decolorization process appeared to a pseudo-first order reaction. The observed first-order rate constants (kobs) varied from 0.087 to 0.033 /min with the dye concentration from 50 to 300 mg/l at 50 g/l sponge iron loading, and half-lives ( 2/1 t ) varied from 7.97 to 21 min. The decolorization efficiency increased with increments of sponge iron dosage, and decreased with the increments of particle size of the sponge iron and initial pH of dye concentration. Under optimal conditions, over 90％ of decolorization efficiency could be obtained. Comparison of UVvis spectra of Reactive Red K-2BP before and after reaction showed disappearance of the absorbance peaks in the visible region after reaction and appearance of a new absorbance peak at 202nm, indicating destruction of the azo bond and generation of many degradation intermediates. X-ray diffraction (XRD) of sponge iron showed magnetite (Fe+2Fe2+3O4) and lepidocrocite (Fe+3O(OH)) on the surface of sponge iron after the reaction.

关键词： Reactive Red K-2BP UV-vis spectra XRD sponge iron decolorization

作者: Mengchun Gao Yanxia Sun Lijuan Yang Yandun Wang

作者单位: Key Lab of Marine Environmental Science and Ecology,Ministry of Education,Ocean University of China, College of Environmental Science and Engineering,Ocean University of China,OUC Qingdao 266100,China

会议类型: 国际会议

会议名称: The 3rd International Conference on Bioinformatics and Biomedical Engineering(iCBBE 2009)(第三届生物信息与生物医学工程国际会议)

会议地点: 北京

会议语种:英文

页码: 1-4

在线出版日期: 2009-06-11（万方平台首次上网日期，不代表论文的发表时间）