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材料导报  2022, Vol. 36 Issue (6): 20110276-6    https://doi.org/10.11896/cldb.20110276
  无机非金属及其复合材料 |
废白土-花生壳生物炭吸附剂的制备及对Pb(Ⅱ) 的吸附
李燕, 陈梅芹, 乔艳辉, 康新平
广东石油化工学院化工学院,广东 茂名 525000
Preparation of Spent Bleaching Earth-Peanut Shell Biochar Adsorbent for Removal of Pb(Ⅱ) in Water
LI Yan, CHEN Meiqin, QIAO Yanhui, KANG Xinping
Schoolof Chemical Engineering,Guangdong University of Petrochemical Technology, Maoming 525000,Guangdong, China
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摘要 以炼油厂废白土(SBE)、花生壳为原料,采用限氧升温炭化法制备新型碱活化粘土矿物生物炭复合材料(SBE/C)。利用BET、X射线荧光光谱仪(XRF)、SEM、XRD、FTIR对SBE/C进行了表征。考察了溶液初始pH、Pb(Ⅱ)溶液浓度、吸附时间和吸附温度分别对SBE/C吸附Pb(Ⅱ)的影响。研究表明,吸附温度为25 ℃, Pb(Ⅱ)溶液浓度为100 mg/L,溶液初始pH为6.0,吸附时间约50 min时,SBE/C对 Pb(Ⅱ)去除率为92.4%,吸附量为184 mg/g。吸附过程是吸热过程,符合Langmuir方程与准二级动力学模型。连续五次吸附-解吸循环后,SBE/C对Pb(Ⅱ)的去除率仍达到84.6%,表明SBE/C可再生并重复使用。
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李燕
陈梅芹
乔艳辉
康新平
关键词:  废白土  花生壳  生物质炭  吸附剂  动力学    
Abstract: The feasibility of employing a new alkali-activated clay mineral biochar composite produced from simultaneous oxygen-limited pyrolysis of peanut shells biomaterials and spent bleaching earth (SBE) was explored. Product materials were characterized by Brunnet-Emmett-Teller (BET), X-ray fluorescence spectrometer(XRF), scanning electron microscope(SEM), X-ray diffractometer(XRD) and Fourier transform infrared spectrometer(FTIR) . The influence of variables like initial metal loading, pH, contact time, and temperature on the adsorptive removal of Pb(Ⅱ) from water was studied, respectively. The adsorption capacity was 184 mg/g with 92.4% of Pb(Ⅱ) removal at 25 ℃,with contact time of 50 min, solution concentration of 100 mg/L and pH=6. Pseudo-second-order kinetics was the most suitable model for the removal of Pb(Ⅱ), while the equilibrium agreed with Langmuir isotherms. The interaction of SBE/C with the wastewater was endothermic interaction. The Pb(Ⅱ) removal rate of SBE/C could still reach about 84.6% even after five run times, which implied SBE/C possessed reusability.
Key words:  spent bleaching earth    peanut shell    biochar    adsorption    kinetics
出版日期:  2022-03-25      发布日期:  2022-03-21
ZTFLH:  X503  
基金资助: 茂名市科技计划(KJ033);广东省科技创新战略专项资金(2018S00145);国家自然科学基金青年基金(41807337)
通讯作者:  liyanjia220@163.com;7358992@qq.com   
作者简介:  李燕,副教授,2004年到广东石油化工学院工作。研究方向为固体废弃物综合利用,主持广东省科研项目2项,国内外学术期刊上发表论文10余篇。
陈梅芹,博士,副教授,2005年8月到广东石油化工学院工作,环境工程专业教师,主讲环境检测、大气污染控制工程等课程。2015年获华南理工大学博士学位,主要研究方向为矿区污染水体重金属元素迁移转化行为及土壤有机污染物界面化学行为。主持国家青年基金1项、广东省自然科学基金项目1项,在国内外学术期刊上发表论文20余篇。
引用本文:    
李燕, 陈梅芹, 乔艳辉, 康新平. 废白土-花生壳生物炭吸附剂的制备及对Pb(Ⅱ) 的吸附[J]. 材料导报, 2022, 36(6): 20110276-6.
LI Yan, CHEN Meiqin, QIAO Yanhui, KANG Xinping. Preparation of Spent Bleaching Earth-Peanut Shell Biochar Adsorbent for Removal of Pb(Ⅱ) in Water. Materials Reports, 2022, 36(6): 20110276-6.
链接本文:  
http://www.mater-rep.com/CN/10.11896/cldb.20110276  或          http://www.mater-rep.com/CN/Y2022/V36/I6/20110276
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