硝酸铁改性活性炭对六价铬离子吸附性能研究  

Adsorption Capacity of Cr(Ⅵ) by Iron Nitrate Modified Activated Carbon

作　　者：郭璇 赵昊星 Guo Xuan;Zhao Haoxing(Xi'an University,Xi'an 710065;Shannxi Yanchang Petroleum(Group)Co.,Ltd Cadre Management College,Xi'an 710065,China)

机构地区：[1]西安文理学院,陕西西安710065 [2]陕西延长石油干部管理学院,陕西西安710065

出　　处：《广东化工》2020年第16期8-9,27,共3页Guangdong Chemical Industry

摘　　要：利用硝酸铁改性和无改性两种活性炭吸附六价铬离子探究吸附时间、溶液pH值、两种活性炭投加量对去除效果的影响。结果表明:颗粒活性炭(GAC)和硝酸铁改性活性炭(Fe-GAC)对六价铬离子的吸附效果均随着时间的增加而增加;GAC和Fe-GAC吸附效果均随着投加量的增加而增加,当吸附剂投加量为5 g/L时,去除率分别为65.41%和73.03%;p H值在4~10的范围内GAC和Fe-GAC的吸附效果均随着pH的升高而降低,pH为4时,吸附效果最好,去除率分别达到81.05%和83.99%;二者均为单分子层吸附;Fe-GAC吸附效果优于GAC的原因为改性后酸性含氧官能团增加,表面酸性增强,表面极性增强。Cr(Ⅵ) was adsorbed by iron nitrate modified and non-modified activated carbons. The influence of adsorption time, pH value of solution, addition amount of two kinds of activated carbon on Cr(Ⅵ) removal was investigated. The results show that adsorption capacity of Cr(Ⅵ) by GAC and Fe-GAC both increased with the increasing of adsorption time and adsorbent dose, removal of Cr(Ⅵ) was 65.41 % and 73.03 % for GAC and Fe-GAC when the adsorbent dose was 5 g/L;adsorption capacity of Cr(Ⅵ) by GAC and Fe-GAC both increased when pH value increased from 4 to 10, and reached the max when pH was 4,removal was 81.05 % and 83.99 %,respectively;the adsorption was monolayer;adsorption capacity of Fe-GAC was better than GAC because of the increasing of acid oxygencontaining functional groups.

关 键 词：硝酸铁改性 活性炭 六价铬离子 

分 类 号：X52[环境科学与工程—环境工程]