蛋壳膜对溴金酸中Au~(3+)的吸附过程研究
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摘要
考察了蛋壳膜吸附溴金酸中Au~(3+)时,吸附剂粒径、pH、吸附时间对吸附过程的影响,采用冷场发射扫描电镜(FESEM)、傅里叶变换红外光谱仪(FT-IR)和XRD对蛋壳膜吸附前后进行表征,研究了其吸附动力学和热力学方程。结果表明,蛋壳膜吸附Au~(3+)的最佳pH为6,蛋壳膜粒径在0.297~0.115mm内对吸附无明显影响。蛋壳膜对金的吸附是物理吸附和化学吸附共同作用的结果,且化学吸附起主要作用。25℃时最大吸附量为438.6mg/g。蛋壳膜对Au~(3+)的吸附符合Langmuir等温吸附方程,遵循准二级动力学方程。
Biosorption of Au(Ⅲ)from tetrabromoauric acid with eggshell membrane was studied to investigate effects of particle size of biomass,pH value,and contact time on adsorption.Eggshell membrane before and after adsorption was characterize by FESEM,FT-IR and XRD.Adsorption kinetics and thermodynamic equation were investigated.The results show that the optimum pH value for Au(Ⅲ)adsorption is six,and particle size of eggshell membrane within 0.297~0.115 mm has no effect on adsorption.Biosorption of Au(Ⅲ)is resulted from interaction of physical adsorption and chemical adsorption,and chemical adsorption plays a major role.The biggest adsorbing capacity at 25 ℃is 438.6 mg/g.Au(Ⅲ)biosorption better fits Langmuir model.
Biosorption of Au(Ⅲ)from tetrabromoauric acid with eggshell membrane was studied to investigate effects of particle size of biomass,pH value,and contact time on adsorption.Eggshell membrane before and after adsorption was characterize by FESEM,FT-IR and XRD.Adsorption kinetics and thermodynamic equation were investigated.The results show that the optimum pH value for Au(Ⅲ)adsorption is six,and particle size of eggshell membrane within 0.297~0.115 mm has no effect on adsorption.Biosorption of Au(Ⅲ)is resulted from interaction of physical adsorption and chemical adsorption,and chemical adsorption plays a major role.The biggest adsorbing capacity at 25 ℃is 438.6 mg/g.Au(Ⅲ)biosorption better fits Langmuir model.
引文
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[13]LETICIA N CORTES,EDUARDO H TANABE,DANIEL A BERTUOL,et al.Biosorption of gold from computer microprocessor leachate solutions using chitin[J].Waste Management,2015,45:272-279.
[14]林芳,贾新刚,秦磊,等.壳聚糖-Cu(Ⅱ)吸附条件的优化[J].中国皮革,2008(3):29-33.
[15]徐楠楠,林大松,徐应明,等.玉米秸秆生物炭对Cd2+的吸附特性及影响因素[J].农业环境科学学报,2014,33(5):958-964.
[16]王清萍,蔡晓奕,金晓英,等.用稻米壳吸附去除废水中的铜离子和铅离子[J].环境保护与循环经济,2009,29(9):39-43.
[2]吴涓,李清彪.重金属生物吸附的研究进展[J].离子交换与吸附,1998,14(2):180-187.
[3]王淑珍,萧炜,陈亮,等.蛋壳膜美容保健奶研制及其营养分析[J].食品工业,2004(6):41-42.
[4]范苗,宋美娜,仝其根,等.蛋壳膜的成分及蛋膜化妆品的制作[J].农产品加工(学刊),2012(10):8-13.
[5]TATSUO MARUYAMA,YASUKI TERASHIMA,SHINANO TAKEDA.Selective adsorption and recovery of precious metal ions using protein-rich biomass as efficient adsorbents[J].Process Biochemistry,2014,49:850-857.
[6]王家强.生物吸附法去除重金属的研究[D].长沙:湖南大学,2010.
[7]刘转年.粉煤灰成型吸附剂的制备及应用[M].北京:化学工业出版社,2009:32-34.
[8]邓潇,周航,陈珊,等.改性玉米秸秆炭和花生壳炭对溶液中Cd2+的吸附[J].环境工程学报,2016,10(11):6325-6331.
[9]陈钰,龚正君,杨顺生,等.改性玉米秸秆吸附Cu2+的动力学和热力学[J].环境工程学报,2013,7(2):523-529.
[10]DONG X,MA L Q,LI Y.Characteristics and mechanisms of hexavalent chromium removal by biochar from sugar beet tailing[J].Journal of Hazardous Materials,2011,190(1/2/3):909-915.
[11]KONISHI Y,TSUKIYAMA T,OHNO K,et al.Intracellular recovery of gold by microbial reduction of AuCl-4ions using the anaerobic bacterium Shewanella algae[J].Hydrometallurgy,2006,81:24-29.
[12]VIJAYARAGHAVAN K,MAHADEVAN A,SATHISHKUMAR M,et al.Biosynthesis of Au(0)from Au(III)via biosorption and bioreduction using brown marine alga Turbinaria conoides[J].Chemical Engineering Journal,2011,167:223-227.
[13]LETICIA N CORTES,EDUARDO H TANABE,DANIEL A BERTUOL,et al.Biosorption of gold from computer microprocessor leachate solutions using chitin[J].Waste Management,2015,45:272-279.
[14]林芳,贾新刚,秦磊,等.壳聚糖-Cu(Ⅱ)吸附条件的优化[J].中国皮革,2008(3):29-33.
[15]徐楠楠,林大松,徐应明,等.玉米秸秆生物炭对Cd2+的吸附特性及影响因素[J].农业环境科学学报,2014,33(5):958-964.
[16]王清萍,蔡晓奕,金晓英,等.用稻米壳吸附去除废水中的铜离子和铅离子[J].环境保护与循环经济,2009,29(9):39-43.