有色金属科学与工程Issue(3)：70-75,6.DOI:10.13264/j.cnki.ysjskx.2014.03.013
粉煤灰活性炭吸附含Cr废水试验研究
Removing Cr from aqueous solutions by coal fly ash carbon with adsorption
摘要
Abstract
Power plant fly ash can be used to prepare coal fly ash carbon with strong adsorption capacity. The impact of coal fly ash carbon on Cr adsorption capacity is studied under the condition of different pH, dosage, time, temperature, solution concentration, adsorption methods. The results show that the adsorption re-action is endothermic process;with the acidity of pH=2, the ratio of Cr and coal fly ash carbon of 250 , and the contacting time over 120 min, the maximum adsorption capacity of Cr (Ⅵ) can hit 4.67 mg/g at 25 ℃ constant temperature. Using NaOH solution to desorb Cr from the Cr-saturating coal fly ash carbon, the concentration of 0.05 mol/L is the most effective with desorb rate of 129 %. Wastewater produced by discards printed circuit boards wet process,in which Cr(Ⅵ) concentration is 0.62 mg/L, in the above condition, the removal rate of Cr (Ⅵ) is 95.16%;if under the condition of natural pH, Cr (Ⅵ) removal rate can reach 91.94%, both meet the integrat-ed wastewater discharge standard. The treatment of metal containing wastewater by coal fly ash carbon has a promising future.关键词
粉煤灰活性炭/吸附性能/含Cr废水/脱附Key words
coal fly ash carbon/adsorption capacity/chromium containing wastewater/desorption分类
矿业与冶金引用本文复制引用
吴彩斌,闵露艳,习海滨,刘杰..粉煤灰活性炭吸附含Cr废水试验研究[J].有色金属科学与工程,2014,(3):70-75,6.基金项目
教育部固体废物处理与资源化重点实验室开放课题资助 （）
