N-羧甲基壳聚糖吸附锰矿废水中锰离子(Ⅱ)研究
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摘要
利用N-羧甲基壳聚糖吸附锰矿废水中Mn2+,通过考察吸附剂质量浓度、溶液pH、吸附温度及时间的影响,采用L16(45)正交试验确定吸附10.6 mg/L Mn2+废水的最佳工艺条件为:30.0 mg/m L N-羧甲基壳聚糖,在溶液pH=5.5、65℃下,振摇吸附8.5 h,Mn2+去除率99.1%,吸附后废水中Mn2+浓度0.095 mg/L,满足国家规定地表水锰含量要求,吸附过程符合Langmiur吸附特征,属于单分子层吸附。由于N-羧甲基壳聚糖吸附锰矿废水中Mn2+工艺简便、吸附效率高,从而可为相关行业的水污染处理提供理论基础。
The manganese ions in manganese industry wastewater was adsorbed by N-carboxymethyl chitosan, and the influence factors including adsorbent mass concentration, pH, temperature and adsorption time were investigated. The optimum adsorption conditions for wastewater with the manganese content of 10.6 mg/L were determined by L16(45) orthogonal test as follows: adsorbent N-carboxymethyl chitosan 30.0 mg/m L, pH=5.5 and temperature 65 °C, adsorption time 8.5 h. The adsorption experiment results show that, under the optimum adsorption conditions, the N-carboxymethyl chitosan adsorption rate is 99.1%, and the residual manganese content is 0.095 mg/L, which can meet the demand of manganese content of surface water. The adsorption process fits with Langmiur characteristics which belongs monomolecular layer adsorption.
The manganese ions in manganese industry wastewater was adsorbed by N-carboxymethyl chitosan, and the influence factors including adsorbent mass concentration, pH, temperature and adsorption time were investigated. The optimum adsorption conditions for wastewater with the manganese content of 10.6 mg/L were determined by L16(45) orthogonal test as follows: adsorbent N-carboxymethyl chitosan 30.0 mg/m L, pH=5.5 and temperature 65 °C, adsorption time 8.5 h. The adsorption experiment results show that, under the optimum adsorption conditions, the N-carboxymethyl chitosan adsorption rate is 99.1%, and the residual manganese content is 0.095 mg/L, which can meet the demand of manganese content of surface water. The adsorption process fits with Langmiur characteristics which belongs monomolecular layer adsorption.
引文
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[3]梁高飞,林常青,于艳,等.高强塑性高锰钢的研究进展[J].铸造技术,2009,30(3):105-108.
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[6]李晓红.68.75%噁酮锰锌水分散粒剂对黄瓜褐斑病的防治效果[J].中国蔬菜,2016(3):66-68.
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