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烟秸杆生物碳对铬(Ⅵ)废水的吸附动力学和热力学

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成果类型:
期刊论文
作者:
唐文清;曾荣英;冯泳兰;刘梦琴;张复兴;...
通讯作者:
Zeng, R.
作者机构:
[Zeng R.] College of Chemistry and Materials Science, Hengyang Normal University, Hengyang, 421008, China
Key Laboratory of Functional Organometallic Materials of Hengyang Normal University, College of Hunan Province, Hengyang, 421008, China
[戴友芝] College of Chemical Engineering, Xiangtan University, Xiangtan, 411105, China
[冯泳兰; 刘梦琴; 张复兴; 彭刚] College of Chemistry and Materials Science, Hengyang Normal University, Hengyang, 421008, China, Key Laboratory of Functional Organometallic Materials of Hengyang Normal University, College of Hunan Province, Hengyang, 421008, China
[唐文清] College of Chemistry and Materials Science, Hengyang Normal University, Hengyang, 421008, China, Key Laboratory of Functional Organometallic Materials of Hengyang Normal University, College of Hunan Province, Hengyang, 421008, China, College of Chemical Engineering, Xiangtan University, Xiangtan, 411105, China
通讯机构:
[Zeng, R.] C
College of Chemistry and Materials Science, Hengyang Normal University, Hengyang, China
语种:
中文
关键词:
烟秸杆;生物炭;吸附;动力学;热力学
关键词(英文):
Cr(Ⅵ)
期刊:
环境工程学报
ISSN:
1673-9108
年:
2015
卷:
9
期:
11
页码:
5161-5166
基金类别:
湖南省自然科学基金资助项目(13JJ9018); 湖南省重点建设学科资助项目;
机构署名:
本校为第一且通讯机构
院系归属:
化学与材料科学学院
摘要:
以农业废弃物烟秸杆为原料,以KH_2PO_4为活化剂,制备了烟秸杆生物碳(简称TSC_(500)),通过静态吸附实验研究了TSC_(500)对含Cr(Ⅵ)废水的吸附性能。采用比表面积分析仪对TSC_(500)进行了测试,实验考察了pH值、吸附剂用量、吸附时间、Cr(Ⅵ)初始浓度和温度对Cr(Ⅵ)吸附的影响,深入研究了TSC_(500)对Cr(Ⅵ)的吸附行为。结果表明,在pH=3、温度313 K条件下,0.2 g TSC_(500)吸附100 mg/L Cr(Ⅵ),去除率和吸附容量分别达到91.32% 和45.66 mg/g,Langmuir和Freundlich比Temkin等温模型更好地拟合吸附实验数据;准一级和准二级动力学模型均能较好地描述该吸附行为,相关系数高达0.99;计算得到热力学参数ΔG~...
摘要(英文):
The preparation of derived-biochar (TSC500) by monopotassium from agricultural wastes, tobacco straw, was studied to adsorb Cr(VI) from aqueous solution. TSC500 was characterized by Brunauer-Emmett-Teller (BET) analysis. Batch experiments were conducted to investigate the effects of pH, adsorbent dose, contact time, initial Cr(VI) concentration and temperature on Cr(VI) adsorption onto TSC500. The results showed that the removal efficiencies and adsorption capacity were 91.32% and 45.66 mg/g under the following conditions: pH of 3.0, adsorbent ...

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