Preparation of nanometer sodium lignosulphonate and study on its adsorption of Zn2+
Through preparation and characterization of nanometer sodium lignosulphonate,the essay made a preliminarily study on the adsorption properties of nano sodium lignin sulfonate on heavy met-al Zn2+ in different conditions. The results indicated that at the early stage,with the longer adsorp-tion time,higher pH value and temperature,Zn2+ adsorption amount increased quickly,the adsorp-tion rate reached 99. 2% at the 5th hour,then came to a stable level;when pH was set at 6,solubil-ity increased gently;and temperature was controlled at 50 cent degree,the adsorbent reached its maximum adsorption activity,but the adsorption activity would decrease with further temperature ris-ing. When 30ml adsorbent was used,the unit adsorption capacity of Zn2+ was 116. 32mg/g,the Zn2+ removal rate was 97. 2%,the highest adsorption capacity. Under the same condition,the ad-sorption capacities of nano agents were all higher than that of non nano agent.
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