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《Non-Metallic Mines》 2006-04
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Treatment of Chromium(VI) in Wastewater by Natural Zeolite-chitosan Compound Adsorbent

Li Zengxin1,2 Duan Chunsheng1 Wang Tong1 Meng Yun1(1 Derartment of Chemistry,Teachers College of Qingdao University,Qingdao 266071;2 College of Environmental Science and Engineering,Donghua University,Shanghai 200051)  
80 mesh natural zeolite was added in chitosan slurry of 90% the degree of deacetylation to prepare adsorbent which mass ratio is 1∶1.2.Its adsorptivity toward Cr(Ⅵ) was studied,and the optimal conditions for the Cr(Ⅵ) adsorption by it were: the mass ratio of chitosan and natural zeolite is 0.04,the dosage of the adsorbent is 8.0 g/L,the mass concentration of Cr(Ⅵ) in wastewater does not exceed 10 mg/L,the pH value is 4 ~ 6,the adsorption equilibrium time is about 40 mins and Cr(Ⅵ) removal efficiency is 80%.Compared with the single granular activated carbon or zeolite or chitosan,the adsorbent has a faster adsorption speed,a better adsorbability and low cost price.
【Fund】: 青岛市科技发展计划项目(项目批准号:05-1-NS-58)
【CateGory Index】: X703
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