硝基苯类污水具有难降解、毒性大、易扩散等特点,目前国内外开始对高浓度硝基苯污水的治理进行深入研究,但对微污染水却少有关注.常规给水处理技术无法处理硝基苯微污染水,长期饮用会对人体健康和生态环境产生严重影响.本文选用水不溶性β-环糊精聚合物为吸附剂,研究水不溶性β-环糊精聚合物的制备,考察其对含硝基苯微污染水的吸附作用,讨论固液比、pH等参数对吸附性能的影响,以及β-环糊精聚合物的再生性能.结果表明,每100mL溶液中加入100mg β-环糊精聚合物为最适固液比;聚合物对200μg/L、500μg/L、1mg/L、2mg/L的硝基苯溶液的吸附效率可达到80%以上;最佳吸附时间为2h;环境pH对吸附效率无太大影响;研究选择了乙醇为最佳再生剂,经连续再生4次后,聚合物吸附效率都维持在80%以上.

Nitrobenzene wastewater is hardly degraded, highly toxic and quickly diffuse. The treatment of nitrobenzene wastewater with high concentration has been well studied, but there is little study about the treatment of low-concentration nitrobenzene wastewater. Ordinary water treatment technology is unable to treat this kind of water. Long-term drinking can be seriously harmful on human health and ecological environment is destroyed. In this article, the synthesis of β-cyclodextrin polymers and the adsorption of β-cyclodextrin polymers on nitrobenzene at low concentration were studied, and the effects of solid-to-liquid ratio with pH were discussed. In addition, regeneration of β-cyclodextrin polymers is also discussed. Results show that in the per 100mL solution containing 100mg cyclodextrin polymers, the effects of solid-to-liquid ratio is the best; The adsorption efficiency of nitrobenzene solution can reach more than 80% in solution of 200μg/L, 500μg/L, 1mg/L, 2mg/L; The best adsorption time is 2h;pH has little effect on the adsorption efficiency; The ethanol is selected as the best regenerative agent, which retains the regeneration of 80% after four times.