Study on the Adsorption of Heavy Metal by Modified Cotton Shell in Waste Water
Acid modified cotton shell was applied to remove Cr6+ from aqueous solutions in this study.The adsorption property of the cotton shell after modified was compared with the before.The effects of contact time, solution pH value, adsorbent dosage, and temperature on the adsorption capacity of Cr6+ by modified cotton shell were investigated, and the kinetics of adsorption was explored by a large number of experiments.The results showed that the adsorptive capacity of cotton shell was enhanced after being modified.Adsorption amount was increased with enhancing the adsorption time and temperature.The removal rate of Cr6+ reached to 99.3% under room temperature, the solution with pH 2, adsorption time with 120min.The adsorption of Cr6+ on the modified cotton shell was a spontaneous and endothermic process, and more followed the Lagergren pseudo-second order kinetics equation.The adsorption rate was controlled by surface diffusion and intra-particle diffusion.Modified cotton shell is inferred to be an economic, effective and stable adsorbent, which would favor the treatment of chromium wastewater.
Cotton shell adsorption chromium wastewater adsorption dynamics
XinlaiWei Peiyang Wang Na Zhang Jie Jin
School of Chemistry and Material Science, University of Science and Technology of China, Hefei 23002 Department of Biological and Environmental Engineering, Hefei University, Hefei 230601, China
国际会议
合肥
英文
82-89
2016-05-19（万方平台首次上网日期，不代表论文的发表时间）