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

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.