虾壳基生物吸附剂的制备及对Cr(Ⅵ)吸附热力学研究
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摘要
以废弃虾壳为原料,在N_2环境下通过管式炉高温活化制备生物吸附材料,并采用场发射扫描电镜、透射电子显微镜、全自动比表面积及孔径分析仪、X射线单晶衍射仪、红外光谱仪对其进行表征;同时探讨了虾壳基生物吸附剂对水中Cr~(6+)的吸附性能。结果表明,在800℃下制备的虾壳基生物吸附剂经过改性后,主要成分是Ca O,比表面积达137.942 m~2/g,是活化前的4倍。通过吸附实验发现,虾壳基生物吸附剂的用量和p H对吸附效果的影响较大,且对Cr~(6+)的吸附同时符合Freundlich和Langmuir两种等温吸附模型。由此可知,通过废弃虾壳制备的生物吸附剂,具有良好的吸附性能,可将其制备成一种纯天然的绿色水处理剂。
Used raw shrimp shells as raw material were prepared into biomass carbon materials at the N_2environment by tube furnace,which were characterized by field emission scanning electron microscopy(FE-SEM),transmission electron microscope(TEM),automatic surface area and pore size analyzer,X-ray single crystal diffraction(XRD)and infrared spectrometer(IR).Then the adsorption characteristics of shrimp shells biomass carbon for Cr(Ⅵ)was analyzed.The results showed that shrimp shells biomass carbon was activated at the temperature of 800℃,which presented at the high surface area(up to 137.942 m~2/g)was 4 times before activation and the main component was Ca O.It was also found that biomass carbon dosage and p H had a great effect on the adsorption capacity of Cr~(6+),and the adsorption of Cr~(6+)was conformed with Freundlich and Langmuir adsorption isotherm model.Therefore,the shrimp shells biomass had good adsorption properties,which could be made into a natural green water treatment agent.
Used raw shrimp shells as raw material were prepared into biomass carbon materials at the N_2environment by tube furnace,which were characterized by field emission scanning electron microscopy(FE-SEM),transmission electron microscope(TEM),automatic surface area and pore size analyzer,X-ray single crystal diffraction(XRD)and infrared spectrometer(IR).Then the adsorption characteristics of shrimp shells biomass carbon for Cr(Ⅵ)was analyzed.The results showed that shrimp shells biomass carbon was activated at the temperature of 800℃,which presented at the high surface area(up to 137.942 m~2/g)was 4 times before activation and the main component was Ca O.It was also found that biomass carbon dosage and p H had a great effect on the adsorption capacity of Cr~(6+),and the adsorption of Cr~(6+)was conformed with Freundlich and Langmuir adsorption isotherm model.Therefore,the shrimp shells biomass had good adsorption properties,which could be made into a natural green water treatment agent.
引文
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[14]侯婉桐,孟祥焘,聂胜强,等.稻壳制备生物质碳对水中六价铬的吸附特性研究[J].台州学院学报,2013,35(6):29-37.
[15]党艳,罗倩,李克斌,等.荞麦皮生物吸附去除水中罗丹明B的吸附条件响应面法及热力学研究[J].环境科学学报,2011,31(12):2601-2608.
[16]康小虎,唐德平,郭燕花,等.香蕉皮吸附剂的制备及其对Cr6+的吸附参数研究[J].食品工业科技,2014,35(11):127-130.
[17]Aksu Z,Acikel U,Kabasakal E,et al.Equilibrium modeling of individual and simultaneous biosorption of chromium(Ⅵ)and nickel(Ⅱ)onto dried activated sludge[J].Water Resouce,2002,36:3063-3073.
[18]董兰,杜阳,马俊格,等.螯合树脂吸附Sr2+的动力学和热力学研究[J].环境科学与技术,2013,36(10):168-172.
[19]刘莹莹,秦海芝,李恋卿,等.不同作物原料热裂解生物吸附剂对溶液中Cd2+和Pb2+的吸附特性[J].生态环境学报,2012,21(1):146-152.
[20]刘莹莹.不同原料生物吸附剂基本性质及其对溶液中Cd2+和Pb2+吸附特性的研究[D].南京:南京农业大学,2012.
[2]Jiang ying Qu,Siyuan Lv,Xi yue,et al.Nitrogen-doped porous“green carbon”derived from shrimp shell:Combined effects of pore sizes and nitrogen doping on the performance of lithium sulfur battery[J].Journal of Alloys and Compounds,2016(671):17-23.
[3]Nordberg GF.Essentiality and toxicity of metals[M].New York:Mc Graw Hill,2002:1-34.
[4]周文霞.生物吸附剂材料的制备及其对金属离子吸附性能的研究[D].山西:中北大学,2015.
[5]GB/T 5750.6-2006中华人民共和国国家标准生活饮用水标准检验方法金属指标[S].北京:中国标准出版社,2006.
[6]史兵方,仝海娟,左卫元,等.麻疯树籽壳生物吸附剂的制备及其吸附水中PAHs性能研究[J].中国环境科学,2016,36(4):1059-1066.
[7]赵阳,高建民,郝新敏,等.基于KOH活化法的核桃壳基活性炭制备及其表征[J].安全与环境学报,2016,16(2):262-266.
[8]Jiangcheng Wang,Stefan Kaskel.KOH activation of carbonbased materials for energy storage[J].Journal of Materials Chemistry,2012,22:23710-23725.
[9]秦玲.生物质多级孔碳材料的制备及其吸附水中磺胺二甲基嘧啶性能研究[D].江苏:江苏大学,2016.
[10]Saikia B K,Boruah R K,Gogoi P K.A X-ray diffraction analysis on graphene layers of Assam coal[J].Journal of Chemical Sciences,2009,121(1):103-106.
[11]李慧芝,李红,熊颖辉.异丙醇改性氢氧化钙的研究[J].无机盐工业,2008(9):32-34.
[12]Song Min,Baosheng Jin,Rui Xiao,et al.The comparison of two activation techniques to prepareactivated carbon from corn cob[J].Biomass and Bioenergy,2013(48):250-256.
[13]牛耀岚,马承愚,李登新,等.KOH活化废弃麻制备活性炭及其结构表征[J].高等学校化学学报,2010(10):1929-1933.
[14]侯婉桐,孟祥焘,聂胜强,等.稻壳制备生物质碳对水中六价铬的吸附特性研究[J].台州学院学报,2013,35(6):29-37.
[15]党艳,罗倩,李克斌,等.荞麦皮生物吸附去除水中罗丹明B的吸附条件响应面法及热力学研究[J].环境科学学报,2011,31(12):2601-2608.
[16]康小虎,唐德平,郭燕花,等.香蕉皮吸附剂的制备及其对Cr6+的吸附参数研究[J].食品工业科技,2014,35(11):127-130.
[17]Aksu Z,Acikel U,Kabasakal E,et al.Equilibrium modeling of individual and simultaneous biosorption of chromium(Ⅵ)and nickel(Ⅱ)onto dried activated sludge[J].Water Resouce,2002,36:3063-3073.
[18]董兰,杜阳,马俊格,等.螯合树脂吸附Sr2+的动力学和热力学研究[J].环境科学与技术,2013,36(10):168-172.
[19]刘莹莹,秦海芝,李恋卿,等.不同作物原料热裂解生物吸附剂对溶液中Cd2+和Pb2+的吸附特性[J].生态环境学报,2012,21(1):146-152.
[20]刘莹莹.不同原料生物吸附剂基本性质及其对溶液中Cd2+和Pb2+吸附特性的研究[D].南京:南京农业大学,2012.