核桃壳粉对模拟微污染水中锰的静态吸附

Static Absorption of Walnut shells to Mn^(2+) in Simulated Micro-polluted Water

采用农业废弃物核桃壳粉对Mn2+浓度为2 mg/L的模拟水样进行了静态吸附研究。结果表明,对于Mn2+浓度为2 mg/L的50 mL模拟水样,采用产地为新疆的核桃粉为吸附剂,当吸附剂粒径为1.0～1.6mm、用量为2.0 g、介质pH值为7.0、吸附时间为300 min时,锰的去除率可以达到89.74%。随着体系温度的升高,Mn2+的吸附量增加。同时对吸附等温线及其模型的拟合进行了试验说明,Freundlich模型能较好地反映吸附过程特征。

The static adsorption of walnut shell powder from Xinjiang to Mn2＋ was studied in this paper.The adsorption rate of the walnut shell powder to Mn2＋ in 50 mL 2 mg/L Mn micro-polluted water could be up to 89.74%when the powder diameter was 1.0～1.6 mm,the adsorbent dosage was 2.0 g,the medium pH was 7.0,and the adsorption time was about 300 minutes.The adsorption amount raised with the increasing of system temperature.And the Freundlich model could reflect the adsorption process better than Langmuir model.