制备了4种不同类型的有机改性凹凸棒土,并对其进行了水中As(Ⅲ)吸附性能和影响因素研究,利用傅里叶变换红外光谱仪和X射线衍射仪对改性前后凹凸棒土的结构进行了分析。结果表明:4种改性凹凸棒土及纯凹凸棒土对水中As(Ⅲ)的吸附均符合准二级动力学方程和Freundlich等温吸附模型。4种改性凹凸棒土对As(Ⅲ)溶液的吸附性能均优于纯凹凸棒土,且具有一定的pH调节能力。傅里叶变换红外光谱和X射线衍射分析表明改性只发生在凹凸棒土表面。
Four kinds of organic modified attapulgite were prepared,and the adsorption properties and influencing factors for As(Ⅲ) in water were studied.The structure of attapulgite before and after modification was analyzed by fourier transform infrared spectrometer and X-ray diffractometer.The results showed that the adsorption of four modified attapulgite and pure attapulgite on As(Ⅲ) in water accorded with the pseudo-second-order kinetic and Freundlich isothermal adsorption model better.The adsorption properties of four modified attapulgite to As(Ⅲ) solution were better than that of pure attapulgite,and had a certain pH adjustment ability.Fourier transform infrared spectroscopy (FT-IR) and X-ray diffraction (XRD) analysis showed that the modification only occurred on the surface of attapulgite.
[1] International agency for research on cancer (IARC).Overall evaluations of carcinogenicity:an updating of IARC monographs volumes 1 to 42.IARC monographs on the evaluation of carcinogenic risks to human[R].Geneva:World Health Organization,1987.
[2] 高健伟,韦炳干,薛源,等.地方性砷中毒地区环境砷暴露健康风险研究进展[J].生态毒理学报,2013,8(2):138-147.
[3] 宣学金.中国水砷污染危及近两千万人[J].中国三峡,2014(4):100-103.
[4] 邓西海.凹凸棒土的改性及其对饮水中高砷吸附行为的研究[D].南京:南京农业大学,2006.
[5] 周奇.粘土矿物的有机功能化及其重金属吸附特性研究[D].武汉:中国地质大学,2016.
[6] 李静萍,杨佳静,管振杰,等.十六烷基三甲基溴化铵改性的凹凸棒黏土对Cu2+的吸附性能[J].材料保护,2014,47(9):59-61;9.
[7] Manning B A,Goldbe R G S.Adsorption and stability of arsenic(Ⅲ) at the clay mineral-water interface[J].Environmental Science & Technology,1997,31:2005-2011.
[8] Theivarasu C,Mylsamy S.Equilibrium and kinetic adsorption studies of Rhodamine-B from aqueous solution using cocoa (Theobroma cacao) shell as new adsorbent[J].International Journal of Engineering Science and Technology,2010,2(11):6284-6292.
[9] Feng-Chin Wu,Ru-Ling Tseng,Ruey-Shin Juang.Characteristics of elovich equation used for the analysis of adsorption kinetics in dye-chitosan systems[J].Chemical Engineering Journal,2009,150(2/3):366-373.
[10] 彭英春.凹凸棒石表面改性及其在高分子复合材料中的应用[D].北京:中国地质大学,2007.
[11] Yuh-Shan Ho,Augustine E Ofomaja.Kinetics and thermodynamics of lead ion sorption on palm kernel fibre from aqueous solution[J].Process Biochemistry,2005,40(11):3455-3461.
[12] 王爱琴.凹凸棒石棒晶束解离及其纳米功能复合材料[M].北京:科学出版社,2014:8.
[13] 李润卿.有结构波谱分析[M].天津:天津大学出版社,2002:6.
[14] Chen Hongxiang,Zheng Maosheng,Sun Hongying,et al.Characterization and properties of sepiolite/polyurethane nanocomposites[J].Materials Science & Engineering A,2006,445-446:725-730.
基金资助
河南省科技攻关项目(172102310245);河南工程学院博士基金项目(D2016013)
PDF
(2204KB)
