无机有机联合改性海泡石对苯的吸附特性研究

摘要/Abstract

摘要： 室内的苯污染主要由装修、装饰材料引起,苯作为一级致癌物,长时间接触会引起许多慢性疾病,如何降低室内苯污染的问题已越来越受到广泛关注。有研究证明海泡石可用于土壤、水和大气污染治理,因此对提纯海泡石进行了水热改性、酸改性和水热酸浸联合无机改性,而后进行三甲氧基苯基硅烷(PTMOS)有机改性,并对改性海泡石吸附苯的性能和机理进行了研究。研究结果表明:对于水热酸浸联合无机改性,其最佳条件为0.6 MPa水热压力处理8 h后,用体积分数为10%的盐酸处理8 h,得到的海泡石对苯的去除率较原矿提高72.36%;表面有机改性最佳处理条件为PTMOS用量0.3 mmol·g^-1,改性时间为6 h,得到的海泡石对苯的去除率较原矿提高159.03%,表面有机改性得到的海泡石吸附效果最好。三甲氧基苯基硅烷改性海泡石(PTMOS-SP)对苯的吸附适合用Langmuir等温线模型、准二级动力学模型和粒子内扩散模型来描述,苯在PTMOS-SP表面的吸附过程包含三个阶段:外表面扩散阶段、孔隙内扩散阶段和吸附平衡阶段。

关键词: 海泡石, 苯吸附, 吸附材料, 无机有机联合改性, 吸附等温线

Abstract: Indoor benzene pollution is mainly caused by decoration and decoration materials.As a first-level carcinogen,prolonged exposure to benzene will cause many chronic diseases.How to reduce indoor benzene pollution has attracted more and more attention.Many studies have proved that sepiolite can be used for soil pollution treatment,water pollution treatment and air pollution treatment.So the purified sepiolite was modified by hydrothermal modification,acid modification and hydrothermal acid leaching methods combine inorganic modification and organic modification of trimethoxyphenylsilane (PTMOS).The performance and mechanism of modified sepiolite adsorbing benzene gas were studied.The results show that the best condition for hydrothermal acid leaching methods combined inorganic modification is 0.6 MPa hydrothermal pressure treatment for 8 h,then treated by hydrochloric acid with a volume fraction of 10% for 8 h.The removal rate of sepiolite to benzene is 72.36% higher than that of rude ore.The best treatment condition for surface organic modification is 0.3 mmol·g^-1 of PTMOS,and the modification time of 6 h.The removal rate of sepiolite to benzene is 159.03% higher than that of rude ore.The surface organic modification has better adsorption effect than the sepiolite obtained by hydrothermal acid leaching combined modification.The adsorption of benzene by PTMOS-SP is suitable for Langmuir isotherm model,quasi-second-order kinetic model and intraparticle diffusion model.The adsorption process of benzene on the surface of PTMOS-SP consists of three stages:the outer surface diffusion stage,the pore diffusion stage,and the adsorption equilibrium stage.

Key words: sepiolite, benzene adsorption, adsorption material, combined inorganic and organic modification, adsorption isotherm

中图分类号:

TQ171

方佳浚, 任子杰, 高惠民, 周贤武, 周鹏. 无机有机联合改性海泡石对苯的吸附特性研究[J]. 硅酸盐通报, 2021, 40(1): 172-179.

FANG Jiajun, REN Zijie, GAO Huimin, ZHOU Xianwu, ZHOU Peng. Adsorption Properties of Inorganic and Organic Modified Sepiolite to Benzene[J]. BULLETIN OF THE CHINESE CERAMIC SOCIETY, 2021, 40(1): 172-179.

参考文献

[1] 梁伟朝.海泡石改性及其吸附挥发性有机物机理与过程研究[D].石家庄:河北科技大学,2016.
LIANG W C.Adsorption mechanism and process of VOCs on modified sepiolite[D].Shijiazhuang:Hebei University of Science and Technology,2016 (in Chinese).
[2] 李湘凌,林岗,周元祥,等.复方液吸收法处理低浓度苯类废气[J].合肥工业大学学报(自然科学版),2002,25(5):794-796.
LI X L,LIN G,ZHOU Y X,et al.Treatment of low concentration benzene organic waste gas by using compound fluid absorption method[J].Journal of Hefei University of Technology (Natural Science),2002,25(5):794-796 (in Chinese).
[3] DENG L L,YUAN P,LIU D,et al.Effects of microstructure of clay minerals,montmorillonite,kaolinite and halloysite,on their benzene adsorption behaviors[J].Applied Clay Science,2017,143:184-191.
[4] DENG L L,DU P X,YU W B,et al.Novel hierarchically porous allophane/diatomite nanocomposite for benzene adsorption[J].Applied Clay Science,2019,168:155-163.
[5] 朱洪志.文冠果加工剩余物活性炭的制备及对VOC吸附性能研究[D].呼和浩特:内蒙古农业大学,2014.
ZHU H Z.Research on preparation and adsorption properties for VOC of activated carbon based on xanthoceras sorbifolia processed residues[D].Hohhot:Inner Mongolia Agricultural University,2014 (in Chinese).
[6] VEKSHA A,SASAOKA E,UDDIN M A.The influence of porosity and surface oxygen groups of peat-based activated carbons on benzene adsorption from dry and humid air[J].Carbon,2009,47(10):2371-2378.
[7] 李琛,夏强,戴宝成.海泡石改性及在铅锌废水处理中的应用研究[J].电镀与精饰,2015,37(1):19-26.
LI C,XIA Q,DAI B C.Research on modification and application of sepiolite in lead and zinc contained wastewater treatment[J].Plating and Finishing,2015,37(1):19-26 (in Chinese).
[8] 徐应明,梁学峰,孙国红,等.酸和热处理对海泡石结构及吸附Pb²⁺、Cd²⁺性能的影响[J].环境科学,2010,31(6):1560-1567.
XU Y M,LIANG X F,SUN G H,et al.Effects of acid and heating treatments on the structure of sepiolite and its adsorption of lead and cadmium[J].Environmental Science,2010,31(6):1560-1567 (in Chinese).
[9] 杨斌彬.海泡石的活化及其对苯乙烯的吸附性能的研究[D].石家庄:河北科技大学,2012.
YANG B B.Absorption of styrene on modified sepiolite[D].Shijiazhuang:Hebei University of Science and Technology,2012 (in Chinese).
[10] 张琦.海泡石吸附性能研究[D].天津:河北工业大学,2002.
ZHANG Q.Study on adsorption characteristic of sepiolite[D].Tianjin:Hebei University of Technology,2002 (in Chinese).
[11] 鲁旖,仇丹,章凯丽.海泡石吸附剂的应用研究进展[J].宁波工程学院学报,2016,28(1):17-22.
LU Y,QIU D,ZHANG K L.Research progress on application of sepiolite absorbent[J].Journal of Ningbo University of Technology,2016,28(1):17-22 (in Chinese).
[12] 韩静,段二红,尹丽鲲,等.改性海泡石对丙酮的吸附特性研究[J].河北工业科技,2017,34(5):381-388.
HAN J,DUAN E H,YIN L K,et al.Study on adsorption characteristics of modified sepiolite to acetone[J].Hebei Journal of Industrial Science and Technology,2017,34(5):381-388 (in Chinese).
[13] 曾召刚,程琪林,胡兴亮,等.海泡石有机改性及在内墙水基涂料中应用研究[J].非金属矿,2018,41(6):71-73.
ZENG Z G,CHENG Q L,HU X L,et al.Study on organic modification of sepiolite and its application in interior water-based coating[J].Non-Metallic Mines,2018,41(6):71-73 (in Chinese).
[14] 李云飞.有机改性海泡石对三元复合驱采出水中乳化油的去除研究[D].山东:山东大学,2018.
LI Y F.Study on the removal of emulsified oil in produced water by organically modified sepiolite in ASP flooding[D].Shandong:Shandong University,2018 (in Chinese).
[15] 胡小平,李晓燕,王玉忠,等.聚丙烯/海泡石复合材料的制备、表征及力学性能[J].功能材料,2010,41(11):1998-2002.
HU X P,LI X Y,WANG Y Z,et al.Preparation and characterization of polypropylene/sepiolite composites and its mechanical properties[J].Journal of Functional Materials,2010,41(11):1998-2002 (in Chinese).
[16] 黄东强,王玉峰,阳辉,等.有机改性海泡石/天然胶乳复合胶膜的制备及性能[J].合成橡胶工业,2018,41(2):151-154.
HUANG D Q,WANG Y F,YANG H,et al.Preparation and properties of organically modified sepiolite/natural latex composite film[J].China Synthetic Rubber Industry,2018,41(2):151-154 (in Chinese).
[17] 肖洪涛,戴文灿,潘婷,等.改性海泡石吸附低浓度Ni(Ⅱ)-CA的研究[J].应用化工,2018,47(11):2410-2414.
XIAO H T,DAI W C,PAN T,et al.Study on the adsorption of low concentration Ni(Ⅱ)-CA in electroplating plant wastewater by modified sepiolite[J].Applied Chemical Industry,2018,47(11):2410-2414 (in Chinese).
[18] 陈冰雁.SDBS有机改性海泡石吸附重金属Pb(Ⅱ)的试验研究[D].长沙:湖南大学,2013.
CHEN B Y.Adsorption of Pb(Ⅱ) by sodium dodecyl benzene sulfonate modified sepiolite[D].Changsha:Hunan University,2013 (in Chinese).
[19] 刘淼,吴鹏,马春彦,等.苯基三甲氧基硅烷水解的影响因素研究[J].化工新型材料,2017,45(10):153-155.
LIU M,WU P,MA C Y,et al.Influence factor of hydrolysis of phenyltrimethoxysilane[J].New Chemical Materials,2017,45(10):153-155 (in Chinese).
[20] CHEN Y C,LIN H C,LEE Y D.The effects of phenyltrimethoxysilane coupling agents on the properties of PTFE/silica composites[J].Journal of Polymer Research,2004,11(1):1-7.
[21] CHEN Q Z,ZHU R L,DENG L L,et al.One-pot synthesis of novel hierarchically porous and hydrophobic Si/SiOx composite from natural palygorskite for benzene adsorption[J].Chemical Engineering Journal,2019,378:122131.
[22] 冯金宇.海泡石的改性与高温气流催化氧化再生过程研究[D].桂林:广西师范大学,2014.
FENG J Y.Study on the modification of sepiolite and its regeneration by catalytic oxidation process using high temperature gas flow[D].Guilin:Guangxi Normal University,2014 (in Chinese).
[23] YANG X,YI H H,TANG X L,et al.Behaviors and kinetics of toluene adsorption-desorption on activated carbons with varying pore structure[J].Journal of Environmental Sciences,2018,67:104-114.