期刊论文

中文

材料导报

1005-023X

2015

29

20

81-86

10.11896/j.issn.1005-023X.2015.20.017

21176086:国家自然科学基金 :湖南省重点学科建设项目(十二五) :湖南省高等学校科技创新团队支持计划

本校为第一机构

采用盐酸和硝酸对活性炭进行改性处理获得酸改性活性炭,并将其用于处理EDTA废水。考察改性条件(如酸的种类、改性时间和酸的浓度)、振荡速度和酸改性活性炭投加量等因素对吸附效果的影响,同时采用吸附等温模型和吸附动力学模型进行拟合分析。结果表明,采用1.0 mol/L盐酸改性12 h所获得的改性活性炭吸附效果最好。在EDTA初始浓度为300 mg/L、溶液体积为50 mL、温度为20 ℃、振荡速度为200 r/min,改性活性炭投加量为0.2 g时,48 h后吸附量为47.1 mg/g,吸附率为62.8%;而当改性活性炭投加量增加到2.0 g时,吸附率达到93.8%。改性活性炭对EDTA的吸附很好地符合Langmuir吸附等温模型(0.9963),其吸附动力...

Activated carbon modified by hydrochloric acid and nitric acid was used as adsorbent to remove EDTA from wastewater.Batch experiments were conducted to investigate the effects of modification conditions（such as the type of acid,modification time and acid concentrations）,shaking speed,and the dosage of acid-modified activated carbon on adsorption.In addition,the process of adsorption were fitted by both adsorption isotherm model and adsorption kinetics model.The results show that the best adsorption effect could be obtained when the concentaio...