摘要
文章通过探究不同吸附条件下羟基氧化铁改性硅藻土对水中铬(Ⅵ)[Cr(Ⅵ)]的去除率,以硅藻土为吸附剂原材料,以羟基氧化铁为改性剂制备改性硅藻土吸附剂。采用批量实验研究了改性吸附剂对水中Cr(Ⅵ)吸附的影响因素(吸附剂投加量、溶液pH等)、吸附动力学、吸附热力学等,设计正交实验,得出最佳条件,并讨论了其吸附机理。结果表明,羟基氧化铁改性硅藻土对Cr(Ⅵ)具有较好的吸附效果,可作为高效、廉价、环保的除铬吸附剂,为以后含铬水体的治理提供理论依据。
In this paper,the removal rate of chromium(Ⅵ)[Cr(Ⅵ)]in water by modified diatomite modified with ferric hydroxide under different adsorption conditions was investigated.The modified diatomite adsorbent was prepared with diatomite as raw material of adsorbent and ferric hydroxide as modifier.The factors affecting the adsorption of Cr(Ⅵ)in water by modified adsorbent(dosage of adsorbent,pH of solution,etc.),adsorption kinetics,adsorption thermodynamics,etc.were studied by batch experiments.Orthogonal experiments were designed to obtain the best conditions,and the adsorption mechanism was discussed.The results show that the diatomite modified by ferric hydroxide has a good adsorption effect on Cr(Ⅵ),and can be used as an efficient,cheap and environmentally friendly adsorbent for chromium removal,providing a theoretical basis for the treatment of chromium-containing water in the future.
出处
《大众科技》
2023年第2期55-59,共5页
Popular Science & Technology
基金
甘肃农业大学省级大学生创新创业训练计划项目(S202010733069)。
关键词
羟基氧化铁
改性
硅藻土
吸附
铬(Ⅵ)
ferric hydroxide
modification
diatomite
adsorption
Cr(Ⅵ)
作者简介
邢丽晓(2000-),女,甘肃农业大学林学院学生,从事重金属吸附研究;通信作者:马敏(1989-),女,藏族,甘肃农业大学林学院讲师,硕士,从事重金属吸附、水土保持研究。
