摘要
以D301弱碱性阴离子树脂作为吸附剂,研究其对废水中Cr(Ⅵ)的吸附-解吸性能。考察了吸附时间、吸附温度及pH对吸附效果的影响,考察解吸剂的加入量及解吸时间对解吸效果的影响。结果表明,在pH=2的酸性环境下,有利于Cr(Ⅵ)的吸附,在6 h吸附达到平衡,吸附等温线符合Langmiur吸附模型。采用质量分数为3%的NaOH,解吸时间为30 min时解吸效果最佳,解吸率达到97.59%,3次吸附-解吸实验表明,树脂能够较好地吸附Cr(Ⅵ)。
D301 weakly basic resin was used as an adsorbent for Cr（Ⅵ）adsorption and desorption.The effect of the adsorption time,adsorption tempreture and pH on adsorption capacity were discussed.The adding amount and time of desorption agent on adsorption capacity were analyzed.The experimental results indicated that it facilitated to adsorb for Cr（Ⅵ）in acid medium at pH=2,the equilibrium time of adsorption was achieved within 6 h,the adsorption isotherm could be fitted by the Langmuir equation.The desorption showed better performance with 3% NaOH and desorption time was 30 min,the desorption rate could be reached 97.59%,three times adsorption desorption proved its excellent adsorption for Cr（Ⅵ）.
出处
《应用化工》
CAS
CSCD
2011年第10期1686-1688,1691,共4页
Applied Chemical Industry
基金
山东省自然科学基金(Z2008B06
ZR2010BL028)
滨州市科学技术发展计划(200923)
