聚丙烯酸钠吸附含铜废水的研究

Study on copper(Ⅱ) adsorption by sodium polyacrylate in wastewater

用聚丙烯酸钠吸附含铜废水,考察了吸附剂用量、时间、温度、pH值对聚丙烯酸钠吸附铜性能的影响。结果表明,对含200 mg/L的高铜废水,吸附条件为温度50℃,聚丙烯酸钠量30 g/L,时间60 min,pH为6时,聚丙烯酸钠对其的吸附率为97.14%,最大吸附容量为8.35 mg/g。聚丙烯酸钠对Cu2+的吸附具有Langmuir吸附特征,分子中的羧基与Cu2+发生了配位作用,吸附机理以单分子层化学吸附为主,吸附量受温度影响不大。

The adsorption properties of sodium polyacrylate（PAAS） to the copper（II） cation in wastewater,the adsorption effect of sodium polyacrylate were studied by adsorbent dosage,time,temperature and pH.The results showed that the adsorbed ratio of the sodium polyacrylate was 97.14%,the adsorption capacity was 8.35 mg/g for the wastewater with the high content of copper（II） cation 200 mg/L,the reaction temperature was 50 ℃,the adsorbent dosage of the sodium polyacrylate were 30 g/L,the time was 60 min for adsorption,and the pH was 6 for the wastewater sample.The adsorption has Langmuir characteristics for the sodium polyacrylate adsorption of copper（II） cation.The adsorption mechanism was mainly monomolecular layer chemical adsorption,the temperature has little effect on adsorption capacity.