工程科学学报，第38卷，第3期：438-445,2016年3月 Chinese Journal of Engineering,Vol.38,No.3:438-445,March 2016 D0l:10.13374/j.issn2095-9389.2016.03.020:http://journals.ustb.edu.cn 石墨烯改性有机膨润土吸附性能及其动力学 邢 奕2》，刘敏”，洪晨3)四，张莹莹》，王康”，赵晓明”，田星强) 1)北京科技大学土木与环境工程学院，北京1000832)工业典型污染物资源化处理北京市重点实验室，北京100083 3)中国科学院生态环境研究中心，北京100085 ☒通信作者，E-mail:hongchen000@126.com 摘要为提高有机膨润士的吸附性能，采用微波合成法，以石墨烯对有机膨润土进行改性，制备一种吸附效果好且回收效 率高的新型石墨烯改性有机膨润土复合材料，研究其结构和吸附性能，探讨新吸附材料的作用机理。通过扫描电镜、红外光 谱和X射线衍射对有机膨润土及石墨烯改性有机膨润土进行表征，并将其用于水中腐殖酸的吸附。结果表明：石墨烯与有机 膨润土均匀复合，有机膨润土的层间距由1.37m增大至2.68m:当温度为25℃、pH值为6、吸附剂的用量为5gL1及吸附 时间为1h时，溶液中腐殖酸的去除率达到95.52%；石墨烯改性有机膨润土对腐殖酸的吸附等温线符合Langmuir模型和准 二级动力学模型，最大理论吸附量为52.08mgg,且为放热反应。利用0.1 mol.L-Nac0H溶液对石墨烯改性有机膨润士进 行解吸再生，5次再生后其对腐殖酸的去除率为86.3%。 关键词石墨烯：膨润土：吸附动力学；腐殖酸：水处理 分类号X703.1 Adsorption performance and kinetics of organobentonite modified with graphene XING Yi),LIU Min,HONG Chen'),ZHANG Ying-ying,WANG Kang",ZHAO Xiao-ming",TIAN Xing-qiang" 1)School of Civil and Environmental Engineering,University of Science and Technology Beijing,Beijing 100083,China 2)Beijing Key Laboratory of Resource-oriented Treatment of Industrial Pollutants,University of Science and Technology Beijing,Beijing 100083,China 3)Research Center for Eco-Environmental Sciences,Chinese Academy Science Beijing 100085,China Corresponding author,E-mail:hongchen000@126.com ABSTRACT A kind of novel modified organobentonite composite owning good adsorption effect and high recovery efficiency was made to improve the adsorption property of organobentonite.Graphene was chosen to modify organobentonite.The modifying process was conducted by microwave irradiation.The structure and adsorption properties of the adsorption material were studied and the mech- anism of action was discussed.Organobentonite and the modified organobentonite were used to adsorb humic acid from water after being characterized by scanning electron microscopy,Fourier transform infrared spectrometry and X-ray diffraction analysis.It is found that graphene and organobentonite composite uniformly and the basal spacing increases from 1.37 to 2.68 nm.The humic acid removal rate reaches 95.52%under the conditions of the temperature of 25 C,the pH value of 6,the composite dosage of 5gLand the adsorption time of 1 h.The adsorption data fits well the Langmuir isotherm model and the pseudo-second-order model,the maximum theoretical adsorption capacity of the composite is 52.08 mg'g,and the adsorption is an exothermic process.The graphene modified organobentonite can be regenerated with NaOH,and the regeneration efficiency reaches 86%after the fifth regeneration when the NaOH concentration is 0.I mol.L-. KEY WORDS graphene:bentonite:adsorption kinetics;humic acid;water treatment 腐殖酸由动植物残体通过复杂的生物或化学作用形成的一类天然水溶性高分子物质，占生态体系总有 收稿日期：201505-22 基金项目：北京市科技新星计划资助项目(Z111106054511043):广东省-教有部产学研结合项目(2012B091000118)工程科学学报，第 38 卷，第 3 期: 438--445，2016 年 3 月 Chinese Journal of Engineering，Vol． 38，No． 3: 438--445，March 2016 DOI: 10． 13374 /j． issn2095--9389． 2016． 03． 020; http: / /journals． ustb． edu． cn 石墨烯改性有机膨润土吸附性能及其动力学 邢 奕1，2) ，刘 敏1) ，洪 晨1，3) ，张莹莹1) ，王 康1) ，赵晓明1) ，田星强1) 1) 北京科技大学土木与环境工程学院，北京 100083 2) 工业典型污染物资源化处理北京市重点实验室，北京 100083 3) 中国科学院生态环境研究中心，北京 100085  通信作者，E-mail: hongchen000@ 126． com 摘 要 为提高有机膨润土的吸附性能，采用微波合成法，以石墨烯对有机膨润土进行改性，制备一种吸附效果好且回收效 率高的新型石墨烯改性有机膨润土复合材料，研究其结构和吸附性能，探讨新吸附材料的作用机理。通过扫描电镜、红外光 谱和 X 射线衍射对有机膨润土及石墨烯改性有机膨润土进行表征，并将其用于水中腐殖酸的吸附。结果表明: 石墨烯与有机 膨润土均匀复合，有机膨润土的层间距由 1. 37 nm 增大至 2. 68 nm; 当温度为 25 ℃、pH 值为 6、吸附剂的用量为 5 g·L － 1 及吸附 时间为 1 h 时，溶液中腐殖酸的去除率达到 95. 52% ; 石墨烯改性有机膨润土对腐殖酸的吸附等温线符合 Langmuir 模型和准 二级动力学模型，最大理论吸附量为 52. 08 mg·g － 1 ，且为放热反应。利用 0. 1 mol·L － 1 NaOH 溶液对石墨烯改性有机膨润土进 行解吸再生，5 次再生后其对腐殖酸的去除率为 86. 3% 。 关键词 石墨烯; 膨润土; 吸附动力学; 腐殖酸; 水处理 分类号 X703. 1 Adsorption performance and kinetics of organobentonite modified with graphene XING Yi 1，2) ，LIU Min1) ，HONG Chen1，3)  ，ZHANG Ying-ying1) ，WANG Kang1) ，ZHAO Xiao-ming1) ，TIAN Xing-qiang1) 1) School of Civil and Environmental Engineering，University of Science and Technology Beijing，Beijing 100083，China 2) Beijing Key Laboratory of Ｒesource-oriented Treatment of Industrial Pollutants，University of Science and Technology Beijing，Beijing 100083，China 3) Ｒesearch Center for Eco-Environmental Sciences，Chinese Academy Science Beijing 100085，China  Corresponding author，E-mail: hongchen000@ 126． com ABSTＲACT A kind of novel modified organobentonite composite owning good adsorption effect and high recovery efficiency was made to improve the adsorption property of organobentonite． Graphene was chosen to modify organobentonite． The modifying process was conducted by microwave irradiation． The structure and adsorption properties of the adsorption material were studied and the mech￾anism of action was discussed． Organobentonite and the modified organobentonite were used to adsorb humic acid from water after being characterized by scanning electron microscopy，Fourier transform infrared spectrometry and X-ray diffraction analysis． It is found that graphene and organobentonite composite uniformly and the basal spacing increases from 1. 37 to 2. 68 nm． The humic acid removal rate reaches 95. 52% under the conditions of the temperature of 25 ℃，the pH value of 6，the composite dosage of 5 g·L － 1 and the adsorption time of 1 h． The adsorption data fits well the Langmuir isotherm model and the pseudo-second-order model，the maximum theoretical adsorption capacity of the composite is 52. 08 mg·g － 1 ，and the adsorption is an exothermic process． The graphene modified organobentonite can be regenerated with NaOH，and the regeneration efficiency reaches 86% after the fifth regeneration when the NaOH concentration is 0. 1 mol·L － 1 ． KEY WOＲDS graphene; bentonite; adsorption kinetics; humic acid; water treatment 收稿日期: 2015--05--22 基金项目: 北京市科技新星计划资助项目( Z111106054511043) ; 广东省--教育部产学研结合项目( 2012B091000118) 腐殖酸由动植物残体通过复杂的生物或化学作用 形成的一类天然水溶性高分子物质，占生态体系总有