论文部分内容阅读
研究了巯基功能化蛋壳膜(TESM)对水溶液中As(Ⅴ)的吸附去除性能.考察了溶液pH值、离子强度、腐殖酸(HA)等的影响,并用Freundlich和Langmuir等温模型对实验数据进行拟合.结果表明,当pH值为8.0时,TESM对As(Ⅴ)的吸附效果最好;NaCl的加入显著降低了TESM对As(Ⅴ)的吸附量;HA的存在降低TESM对As(Ⅴ)的吸附能力,但进一步增大腐植酸质量浓度对TESM吸附As(Ⅴ)无显著影响;TESM对As(Ⅴ)的吸附符合Langmuir吸附模型和准二级动力学模型,最大吸附量为21.51mg/g,为未功能化蛋壳膜吸附量的9倍.
The adsorption and desorption properties of As (Ⅴ) on aqueous solution were investigated by using TESM, and the effect of solution pH, ionic strength, humic acid (HA) and so on were investigated. The effects of Freundlich and Langmuir isotherm experiments The results showed that the adsorption of As (Ⅴ) by TESM was the best when the pH value was 8.0. The addition of NaCl significantly reduced the adsorption of As (Ⅴ) by TESM; the presence of HA reduced the binding of TESM to As (Ⅴ). However, the further increase of humic acid concentration had no significant effect on the adsorption of As (Ⅴ) on TESM. The adsorption of As (Ⅴ) on TESM accords with the Langmuir adsorption model and pseudo second-order kinetic model. The maximum adsorption capacity was 21.51mg / g, which is 9 times of that of unfunctionalized eggshell membrane.