硫酸钙晶须对水中Pb2+的吸附性能

Adsorption properties of calcium sulfate whiskers on Pb(Ⅱ)

利用硫酸钙晶须对含Pb2+水样进行静态吸附试验,研究了其对Pb2+的吸附性能及机理。试验结果表明,硫酸钙晶须对Pb2+的去除效果好、处理效率高,其对Pb2+的去除率可达到97.54%。同时,根据吸附热力学和吸附动力分析可知,硫酸钙晶须对Pb2+的主导吸附方式为单分子层的化学吸附,吸附规律可用Langmuir方程和二级动力学方程进行很好地模拟。

Through the Static adsorption test of lead ion by calcium sulfate whiskers(CSW), We have discussed the performance and mechanism of the adsorption. Experimental results demonstrated that CSW exhibited high removal rate and superior processing efficiency on the lead ion treatment, and the lead ion removal rate was up to97.54%. At the same time, based on the analysis of thermodynamics and kinetics shows that the main adsorption process of lead ion is control by monolayer chemical adsorption,and the law of the adsorption can be well simulated by Langmuir equation and second-order kinetic equation.