PAA-硅胶净水剂对重金属的吸附性能研究

Study on Adsorption Capability to Heavy Metal of PAA-silica Gel for Water Clarifier

摘要: 为了解PAA-硅胶对重金属的吸附能力,对其静态吸附性能进行了测定,包括pH对吸附性能的影响、吸附平衡、重金属离子浓度对吸附性能的影响和温度对吸附性能的影响等实验.实验结果表明:PAA-硅胶使吸附达到最佳的pH分别为:Cu²⁺,4.0;Zn²⁺,5.0;Ni²⁺,5.5;Co²⁺,5.0;pb²⁺,4.0;在适合的pH条件下,PAA-硅胶对重金属具有良好的选择吸附性能,适用于含重金属水体的处理,对水中微量重金属的去除效率较高;温度升高有利于吸附.

Abstract: In order to realize the adsorption capability of PAA-silica gel on heavy metals, we mensurated its static adsorption capability by such experiments as the infection of pH on adsorption capability, adsorption balance, the infection of metal ion concentration on adsorption capability, and the temperature on adsorption capability, etc. Experiment results show that the acidity affects the adsorption capability of PAA-silica gel on heavy metals and the optimum pH values are Cu²⁺,4.0;Zn²⁺, 5.0;Ni²⁺, 5.5;Co²⁺, 5.0;Pb²⁺,4.0. In the fit condition, PAA-silica gel is of high performance of selective adsorbent on heavy metals and can be to waste water disposal which has heavy metals. And the trace heavy metals in the water also can be rather completely adsorbed by PAA-silica gel. In addition, high temperature can accelerate adsorption.