生物质改性大蒜渣吸附含铬电镀废水

The Garlic Slag of Biomass Adsorption of Chromium-Containing Electroplating Wastewater

摘要: 以大蒜渣作为原料，对其进行改性之后制成复合生物质吸附剂，用于处理含铬的电镀废水。实验研究了pH值、吸附反应时间、吸附材料生物质大蒜渣的投加量以及絮凝剂的加入量对含铬废水的处理效果的影响。得出生物质改性大蒜渣吸附含铬电镀废水最优条件为：溶液pH为9、吸附反应时间为10 min、大蒜渣的用量/溶剂体积为1:1、絮凝剂添加量为1 ml时。处理含铬离子浓度为50 mg/L的废水铬离子去除率达到95%以上，处理后残留铬离子浓度为小于0.5 mg/L，达到国家污水综合排放一级标准。

Abstract: The garlic slag is used as raw material and modified to composite biomass adsorbent for treating the chromium-containing electroplating wastewater. The effects of pH value, adsorption reaction time, dosage of garlic slag of biomass and the amount of flocculant on the treatment effect of chromium-containing wastewater were studied. We can get the optimum conditions as follows: the pH of the solution was 9, the adsorption reaction time was 10 min, the dosage of the garlic slag/solvent volume was 1:1, and the amount of the flocculant was 1 ml. And using the optimum conditions to adsorb the chromium ion in waste containing 50 mg/L, the concentration rate was over 95%, and the residual chromium ion concentration was less than 0.5 mg/L, which reached the national comprehensive discharge standard.