[1]董良飞,郜 飞,刘会东,等.凹凸棒土/玉米秸秆生物炭制备及对四环素的吸附[J].常州大学学报(自然科学版),2023,35(02):46-58.[doi:10.3969/j.issn.2095-0411.2023.02.006 ]
　DONG Liangfei,GAO Fei,LIU Huidong,et al.Preparation of attapulgite/corn straw biochar and its adsorption on tetracycline[J].Journal of Changzhou University(Natural Science Edition),2023,35(02):46-58.[doi:10.3969/j.issn.2095-0411.2023.02.006 ]
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凹凸棒土/玉米秸秆生物炭制备及对四环素的吸附 ()
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常州大学学报(自然科学版)[ISSN:2095-0411/CN:32-1822/N]

卷:
第35卷
期数:
2023年02期
页码:
46-58
栏目:
环境科学与工程:环境污染与生态修复专题
出版日期:
2023-03-28

文章信息/Info

Title:
Preparation of attapulgite/corn straw biochar and its adsorption on tetracycline
文章编号:
2095-0411(2023)02-0046-13
作者:
董良飞1; 2;  郜 飞1;  刘会东2;  陈云亮1;  鲁光辉3
(1.常州大学 环境科学与工程学院, 江苏 常州 213164; 2.常州大学 城市建设学院, 江苏 常州 213164; 3.盱眙县中材凹凸棒石粘土有限公司, 江苏 盱眙 211700)
Author(s):
DONG Liangfei1; 2;  GAO Fei1;  LIU Huidong2;  CHEN Yunliang1;  LU Guanghui3
(1.School of Environmental Science and Engineering, Changzhou University, Changzhou 213164, China; 2.School of Urban Construction, Changzhou University, Changzhou 213164, China; 3.Xuyi County Sinoma Attapulgite Clay Corporation, Xuyi 211700, China)
关键词:
凹凸棒土;  玉米秸秆生物炭;  复合材料;  四环素;  吸附剂
Keywords:
attapulgite;  corn straw biochar;  compound material;  tetracycline;  adsorbent
分类号:
X 712
DOI:
10.3969/j.issn.2095-0411.2023.02.006
文献标志码:
A
摘要:
研究以NaOH为活化剂对凹凸棒土/玉米秸秆(ATP/CS)进行碱改性,在限氧条件下慢速共热解制备凹凸棒土/玉米秸秆生物炭(ATP/CSBC),用于去除水中的四环素(TC)。采用响应曲面法对NaOH浸渍浓度、NaOH浸渍时间、热解温度3种制备影响因素进行优化研究,探讨各因素之间对ATP/CSBC吸附性能的交互影响。通过多种仪器对ATP/CSBC的微观形貌和理化性质进行了分析,同时考察了吸附剂投加量、pH、初始浓度及吸附时间等因素对TC吸附量的影响。实验结果表明,在投加量为0.6 g/L,pH=8,TC初始质量浓度为200 mg/L、吸附时间为240 min时,ATP/CSBC质量比为1:1时,TC的吸附量最大为177.77 mg/g。ATP/CSBC对TC的吸附更符合Langmuir等温线模型和准二级动力学模型,且颗粒内扩散模型拟合结果表明该扩散行为非吸附过程中唯一限速因素,吸附速率可能由液膜扩散、颗粒内扩散和表面吸附等共同控制。
Abstract:
In this work, attapulgite/corn straw biochar(ATP/CSBC)was prepared by alkali modification of attapulgite/corn straw(ATP/CS)with NaOH as an activator and slow co pyrolysis under oxygen limited conditions, which was used to remove tetracycline(TC)from water. Response surface methodology was used to optimize the three preparation parameters, namely NaOH impregnation concentration, NaOH impregnation time and pyrolysis temperature, and to explore the interaction of these factors on the adsorption performance of ATP/CSBC. The micro morphology and physical and chemical properties of ATP/CSBC were analyzed by Multiple instruments, and the effects of adsorbent dosage, pH, initial concentration and adsorption time on TC adsorption were investigated. The experimental results showed that when the dosage was 0.6 g/L, pH=8, the initial concentration of TC was 200 mg/L, and the adsorption time was 240 min, the maximum adsorption capacity of ATP/CSBC(Mass ratio is 1:1)to TC was 177.77 mg/g. The adsorption of TC by ATP/CSBC was more consistent with Langmuir isotherm model and quasi second order kinetic model, and the fitting of intraparticle diffusion model indicated that this diffusion behavior was not the only speed limiting factor in the adsorption process, and the adsorption rate might be jointly controlled by all steps including liquid film diffusion, intraparticle diffusion and surface adsorption.

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备注/Memo

备注/Memo:
收稿日期: 2023-01-18。
基金项目: 盱眙县中材凹凸棒石粘土有限公司科技开发基金资助项目(2022320405000020)。
作者简介: 董良飞(1972—), 男, 江苏沛县人, 博士, 教授。 E-mail: dlf@cczu.edu.cn

更新日期/Last Update: 1900-01-01