石墨烯@有机膨润土颗粒对刚果红的吸附性能研究
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摘要
制备了石墨烯@有机膨润土颗粒,利用FT-IR、SEM、N_2吸附-脱附与模型拟合分析,研究了该颗粒吸附剂对刚果红的吸附性能与机理。结果表明,石墨烯中的羧基与季铵盐离子形成了酰胺键,官能团-OH、N-H、Si-O-Si、Al-O-Si等参与吸附反应;颗粒吸附剂的平均孔径为5.53nm,以介孔为主,BET比表面积为60.3506m~2/g;室温下,投加量为20g/L,p H值为5,110r/min的转速下振荡180min时,石墨烯@有机改性膨润土颗粒对100mg/L刚果红模拟废水的去除率达97.09%;吸附过程符合准二级动力学方程,吸附行为更符合Freundlich吸附等温模型,表明其吸附为多层非均相吸附。
Graphene @ organobentonite granules were prepared and were used as the sorbent to remove the congo red under different conditions including pH, initial concentrations, adsorbent doses and time. The structure and mechanism were also investigated using FT-IR、SEM、N_2 adsorption-desorption and model simulation. The FT-IR and SEM analyses showed that the key bond were formed between the framework of organobentonite and the main functional groups involved were-OH, N-H, Si-O-Si and Al-O-Si. Graphene @ organobentonite granules shared a lot of mesopores, while the average pore size of the particle adsorbent was 5.53 nm and the surface area reached to 60.3506 m~2/g. At room temperature, the removal rate of the granular adsorbent on congo red could reach 97.09% under following conditions: The initial congo red mass concentration was 100 mg/L, the pH value was 5, the adsorption time was 180 min, and the dosage was 20 g/L. The adsorption process followed the Pseudo-second-order kinetic equation.The behavior was fitted well with the Freundlich sorption isotherm equation and was polymolecular layer adsorption process.
Graphene @ organobentonite granules were prepared and were used as the sorbent to remove the congo red under different conditions including pH, initial concentrations, adsorbent doses and time. The structure and mechanism were also investigated using FT-IR、SEM、N_2 adsorption-desorption and model simulation. The FT-IR and SEM analyses showed that the key bond were formed between the framework of organobentonite and the main functional groups involved were-OH, N-H, Si-O-Si and Al-O-Si. Graphene @ organobentonite granules shared a lot of mesopores, while the average pore size of the particle adsorbent was 5.53 nm and the surface area reached to 60.3506 m~2/g. At room temperature, the removal rate of the granular adsorbent on congo red could reach 97.09% under following conditions: The initial congo red mass concentration was 100 mg/L, the pH value was 5, the adsorption time was 180 min, and the dosage was 20 g/L. The adsorption process followed the Pseudo-second-order kinetic equation.The behavior was fitted well with the Freundlich sorption isotherm equation and was polymolecular layer adsorption process.
引文
[1]Xu H,Wu L,Shi T,et al.Adsorption of acid fuchsin onto LTA-type zeolite derived from fly ash.Science China Technological Sciences[J].2014,57(6):1127-1134.
[2]王翠萍,张杰,胡静,等.改性麦糠对刚果红模拟废水吸附性能的研究.化工新型材料[J].2014,42(9):178-190.
[3]卫新来,冯玲玲,杨倩,等.改性棉铃壳对水中刚果红的吸附性能.环境工程学报[J].2016,10(11):6403-6408.
[4]方巧.改性沸石对水中氮磷和染料的吸附作用[D].硕士学位论文,上海:上海海洋大学,2015.
[5]孙志勇,严彪,王爱民,等.壳聚糖/CTAB复合改性膨润土对活性红X-3B的吸附.环境科学学报[J].2017,37(2):618-623.
[6]陈晓蕾.有机改性膨润土对选矿废水中丁铵黑药的吸附性能研究[D].硕士学位论文,济南:山东大学,2018.
[7]孙志勇,严彪,王爱民,等.改性膨润土对刚果红的吸附动力学及热力学研究.硅酸盐通报[J].2017,36(4):1159-1168.
[8]孟波,郭巧霞,王凯,等.复合改性膨润土对亚甲基蓝的吸附性能研究.工业水处理[J].2018,38(2):35-39.
[9]谢伟楠,聂锦旭,邹祥俊,等.改性膨润土复合新型颗粒的制备与表征.硅酸盐通报[J].2016,35(9):2990-2994.
[10]肖利萍,宋佳诺,王睿键,等.膨润土-钢渣颗粒对含Mn2+酸性矿山废水的去除.工业水处理[J].2018,38(5):46-49.
[11]钟亚兵.膨润土复合材料的制备成型及其在染料吸附中的应用[D].硕士学位论文,泉州:华侨大学,2017.
[12]刘子森,张义,贺锋,等.改性膨润土对杭州西湖沉积物各形态磷的吸附性能.环境科学学报[J].2018,38(6):2445-2453.
[13]邵俊,桑蓉栎,郭丰艳,等.改性方法对石墨烯改性有机膨润土颗粒吸附性能的影响.硅酸盐通报[J].2018,37(3):1094-1102.
[14]邢奕,刘敏,洪晨,等.石墨烯改性有机膨润土吸附性能及其动力学.工程科学学报[J].2016,38(3):438-445.
[15]赵振国主编.吸附作用应用原理[M].北京:化学工业出版社,2005.
[16]吴艳,罗金汉,王侯.改性木屑对水中刚果红的吸附性能研究.环境科学学报[J].2014,34(7):1680-1688.
[17]石召红.改性沸石对印染废水的吸附脱色研究[D].硕士学位论文,天津:天津理工大学,2016.
[18]周道晏.改性烟草秸秆对阴离子污染物的吸附特性研究[D].硕士学位论文,雅安:四川农业大学,2016.
[19]Anirudhan T S,Ramachandran M.Adsorptive removal of basic dyes from aqueous solutions by surfactant modified bentonite clay(organoclay):Kinetic and competitive adsorption isotherm.Process Safety&Environmental Protection[J].2015,95(3):215-225.
[20]王彤彤,马江波,曲东,等.两种木材生物炭对铜离子的吸附特性及其机制.环境科学[J].2017,38(5):2161-2171.
[2]王翠萍,张杰,胡静,等.改性麦糠对刚果红模拟废水吸附性能的研究.化工新型材料[J].2014,42(9):178-190.
[3]卫新来,冯玲玲,杨倩,等.改性棉铃壳对水中刚果红的吸附性能.环境工程学报[J].2016,10(11):6403-6408.
[4]方巧.改性沸石对水中氮磷和染料的吸附作用[D].硕士学位论文,上海:上海海洋大学,2015.
[5]孙志勇,严彪,王爱民,等.壳聚糖/CTAB复合改性膨润土对活性红X-3B的吸附.环境科学学报[J].2017,37(2):618-623.
[6]陈晓蕾.有机改性膨润土对选矿废水中丁铵黑药的吸附性能研究[D].硕士学位论文,济南:山东大学,2018.
[7]孙志勇,严彪,王爱民,等.改性膨润土对刚果红的吸附动力学及热力学研究.硅酸盐通报[J].2017,36(4):1159-1168.
[8]孟波,郭巧霞,王凯,等.复合改性膨润土对亚甲基蓝的吸附性能研究.工业水处理[J].2018,38(2):35-39.
[9]谢伟楠,聂锦旭,邹祥俊,等.改性膨润土复合新型颗粒的制备与表征.硅酸盐通报[J].2016,35(9):2990-2994.
[10]肖利萍,宋佳诺,王睿键,等.膨润土-钢渣颗粒对含Mn2+酸性矿山废水的去除.工业水处理[J].2018,38(5):46-49.
[11]钟亚兵.膨润土复合材料的制备成型及其在染料吸附中的应用[D].硕士学位论文,泉州:华侨大学,2017.
[12]刘子森,张义,贺锋,等.改性膨润土对杭州西湖沉积物各形态磷的吸附性能.环境科学学报[J].2018,38(6):2445-2453.
[13]邵俊,桑蓉栎,郭丰艳,等.改性方法对石墨烯改性有机膨润土颗粒吸附性能的影响.硅酸盐通报[J].2018,37(3):1094-1102.
[14]邢奕,刘敏,洪晨,等.石墨烯改性有机膨润土吸附性能及其动力学.工程科学学报[J].2016,38(3):438-445.
[15]赵振国主编.吸附作用应用原理[M].北京:化学工业出版社,2005.
[16]吴艳,罗金汉,王侯.改性木屑对水中刚果红的吸附性能研究.环境科学学报[J].2014,34(7):1680-1688.
[17]石召红.改性沸石对印染废水的吸附脱色研究[D].硕士学位论文,天津:天津理工大学,2016.
[18]周道晏.改性烟草秸秆对阴离子污染物的吸附特性研究[D].硕士学位论文,雅安:四川农业大学,2016.
[19]Anirudhan T S,Ramachandran M.Adsorptive removal of basic dyes from aqueous solutions by surfactant modified bentonite clay(organoclay):Kinetic and competitive adsorption isotherm.Process Safety&Environmental Protection[J].2015,95(3):215-225.
[20]王彤彤,马江波,曲东,等.两种木材生物炭对铜离子的吸附特性及其机制.环境科学[J].2017,38(5):2161-2171.