[1]姚书恒,姜小祥,沈德魁,等.稻壳活性炭对Cr(Ⅵ)离子吸附过程的机理[J].东南大学学报(自然科学版),2015,45(3):515-520.[doi:10.3969/j.issn.1001-0505.2015.03.018]
　Yao Shuheng,Jiang Xiaoxiang,Shen Dekui,et al.Mechanism of removal of Cr(Ⅵ)ions in water by activated carbon prepared from rice husk[J].Journal of Southeast University (Natural Science Edition),2015,45(3):515-520.[doi:10.3969/j.issn.1001-0505.2015.03.018]
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稻壳活性炭对Cr(Ⅵ)离子吸附过程的机理()
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《东南大学学报(自然科学版)》[ISSN:1001-0505/CN:32-1178/N]

卷:
45
期数:
2015年第3期
页码:
515-520
栏目:
能源与动力工程
出版日期:
2015-05-20

文章信息/Info

Title:
Mechanism of removal of Cr(Ⅵ)ions in water by activated carbon prepared from rice husk
作者:
姚书恒1; 姜小祥2; 沈德魁1; 肖睿1; 金保昇1
1东南大学能源热转换及其过程测控教育部重点实验室, 南京 210096; 2南京师范大学能源与机械工程学院, 南京 210042
Author(s):
Yao Shuheng1;  Jiang Xiaoxiang2;  Shen Dekui1;  Xiao Rui1;  Jin Baosheng1
1Key Laboratory of Energy Conversion and Process Control of Ministry of Education, Southeast University, Nanjing 210096, China
2School of Energy and Mechanical Engineering, Nanjing Normal University, Nanjing 210042, China
关键词:
稻壳;  氯化锌;  活性炭;  吸附;  六价铬离子
Keywords:
rice husk;  zinc chloride;  activated carbon;  adsorption;  chromium(Ⅵ)
分类号:
TK6
DOI:
10.3969/j.issn.1001-0505.2015.03.018
摘要:
以稻壳为原料,氯化锌为活化剂,运用微波电加热双模式制备活性炭,并研究了活性炭净化水中重金属(六价)铬离子的机理.通过单因素实验得到制备活性炭的最佳工况为:活化温度600 ℃,活化时间50 min,浸渍比(m(氯化锌)∶m(稻壳))1.5∶1,升温速率15 ℃/min.使用FTIR、比表面积及孔径分析仪(BET)、pHIEP(等电位点pH)等方法表征最佳工况下活性炭的孔隙特性及表面化学性质.实验结果表明,稻壳活性炭的比表面积达到了1 719.32 m2/g,总孔容1.05 cm3/g.进一步研究了吸附时间、pH值、活性炭投加量及(六价)铬离子初始浓度对活性炭吸附重金属(六价)铬离子的影响规律,结果表明,在pH=2.0~3.0时,最佳工况下制备的活性炭具有最大吸附量,并且在90 min时达到吸附平衡.
Abstract:
Taking rice husk as raw material and zinc chloride as activation, the activated carbon was prepared by microwave and electric dual-mode heating. The mechanism of removal of chromium(Ⅵ)ions in water were studied. The optimum conditions, including the activation temperature of 600 ℃, the activation time of 50 min, the impregnation ratio(m(ZnCl2)∶m(rice husk))of 1.5∶1, and the heating rate of 15 ℃/min were obtained through single factor experiments. The porous characteristics and surface chemical properties of activated carbon under optimum conditions were characterized by FTIR, specific surface area and porosity analyzer and pHIEP(pH of isoelectric point). The influence laws on Cr(Ⅵ)adsorption capacity by the contact time, pH, adsorbent dose and initial concentration of Cr(Ⅵ)ions were investigated. The results show that the specific surface area achieves 1 719.32 m2/g, and the total pore volume was 1.05 cm3/g. For the activated carbon from optimum conditions the maximum adsorption capacity is achieved when pH is between 2.0 and 3.0, and equilibrium adsorption stage is attained within 90 min.

参考文献/References:

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备注/Memo

备注/Memo:
收稿日期: 2014-11-22.
作者简介: 姚书恒(1990—),男,硕士生;沈德魁(联系人),男,博士,教授,101011398@seu.edu.cn.
基金项目: 国家教育部留学归国人员启动基金资助项目、江苏省自然科学基金资助项目(BK20141451).
引用本文: 姚书恒,姜小祥,沈德魁,等.稻壳活性炭对Cr(Ⅵ)离子吸附过程的机理[J].东南大学学报:自然科学版,2015,45(3):515-520. [doi:10.3969/j.issn.1001-0505.2015.03.018]
更新日期/Last Update: 2015-05-20