脱硫石膏基羟基磷灰石对Cu~(2+)吸附性能的研究
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- 英文论文题名：Cu~(2+) removal from wastewater using hydroxyapatite prepared from FGD gypsum
- 论文作者：严玉波 ; 董晓丽 ; 孙晓蕾 ; 李健生 ; 沈锦优 ; 韩卫清 ; 刘晓东 ; 孙秀云 ; 王连军
- 英文论文作者：YAN Yu-bo ; DONG Xiao-li ; SUN Xiao-lei ; LI Jian-sheng ; SHEN Jin-you ; HAN Wei-qing ; LIU Xiao-dong ; SUN Xiu-yun ; WANG Lian-jun ; Jiangsu Key Laboratory of Chemical Pollution Control and Resources Reuse ; School of Environmental Science and Engineering ; Nanjing University of Science and Technology
- 年：2014
- 作者机构：江苏省化工污染控制与资源化重点实验室南京理工大学环境与生物工程学院;
- 论文关键词：脱硫石膏 ; 羟基磷灰石 ; 吸附 ; 响应面分析法
- 英文论文关键词：FGD gypsum ; hydroxyapatite ; adsorption ; response surface methodology
- 会议召开时间：2014-12-13
- 会议录名称：“第四届重金属污染防治及风险评价研讨会”暨重金属污染防治专业委员会2014年学术年会论文集
- 语种：中文
- 分类号：O647.33;X703
- 学会代码：HJKP
- 会议名称：“第四届重金属污染防治及风险评价研讨会”暨重金属污染防治专业委员会2014年学术年会
- 会议地点：中国江苏盐城
- 主办单位：中国环境科学学会、同济大学
- 学会名称：中国环境科学学会
- 页数：12
- 文件大小：2645k
- 原文格式：D
- 会议级别：全国
摘要
以燃煤电厂废弃物脱硫石膏(FGD)为主要原料,利用水热合成法制备羟基磷灰石(FGD-HA),利用XRD和SEM对FGD-HA的物相组成和微观形貌进行了分析和观察.通过静态吸附实验研究了吸附动力学、吸附等温线以及吸附热力学.结果表明,伪二级动力学模型相关系数为0.9998,是描述FGD-HA吸附Cu~(2+)的最佳动力学模型,Cu~(2+)在FGD-HA上的吸附平衡符合Langmuir等温线模型(R~2=0.9846),热力学表明此吸附是自发吸热的过程.利用响应面分析法对Cu~(2+)的吸附条件进行优化,得出投加量3.11g/L、pH值4.96、温度22.09℃、Cu~(2+)初始浓度24.75mg/L为最佳吸附条件,此条件下Cu~(2+)去除率预测值为100%,相同条件下开展的验证实验结果为97.4%,与预测值相接近说明模型的选择是实际可行的.
Hydroxyapatite(FGD-HA) was synthesized from waste FGD gypsum using hydrothermal method. FGD-HA was characterized by X-ray diffraction(XRD) and scanning electron microscope(SEM) and investigated as adsorbent for removal Cu~(2+) from wastewater. The sorption kinetics, isotherms and thermodynamics of Cu~(2+) adsorption onto FGD-HA were investigated by batch tests. The kinetic data were evaluated utilizing pseudo-first order and pseudo-second order models, and the experimental data agreed well with the pseudo-second order model due to its relatively high R~2 value(0.9998). The equilibrium data were further analyzed by using the Langmuir, Freundlich and Dubinin-Radushkevich models. Equilibrium sorption of Cu~(2+) onto FGD-HA had best fitness with the Langmuir model. Response surface methodology(RSM) was employed to optimize the adsorption process parameters. The optimum operating conditions were determined as dosage of 3.11g/L, pH of 4.96, temperature of 22.09℃, initial concentration of 24.75mg/g, and the removal efficiency for Cu~(2+) was found to be 100%. The verification experiment was also carried out at the same conditions and the result was 97.4%, confirming that the model was effective.
Hydroxyapatite(FGD-HA) was synthesized from waste FGD gypsum using hydrothermal method. FGD-HA was characterized by X-ray diffraction(XRD) and scanning electron microscope(SEM) and investigated as adsorbent for removal Cu~(2+) from wastewater. The sorption kinetics, isotherms and thermodynamics of Cu~(2+) adsorption onto FGD-HA were investigated by batch tests. The kinetic data were evaluated utilizing pseudo-first order and pseudo-second order models, and the experimental data agreed well with the pseudo-second order model due to its relatively high R~2 value(0.9998). The equilibrium data were further analyzed by using the Langmuir, Freundlich and Dubinin-Radushkevich models. Equilibrium sorption of Cu~(2+) onto FGD-HA had best fitness with the Langmuir model. Response surface methodology(RSM) was employed to optimize the adsorption process parameters. The optimum operating conditions were determined as dosage of 3.11g/L, pH of 4.96, temperature of 22.09℃, initial concentration of 24.75mg/g, and the removal efficiency for Cu~(2+) was found to be 100%. The verification experiment was also carried out at the same conditions and the result was 97.4%, confirming that the model was effective.
引文
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[13]Sismanoglu T,Kismir Y,Karakus S.Single and binary adsorption of reactive dyes from aqueous solutions onto clinoptilolite[J].Journal of Hazardous Materials,2010,184(1–3):164–169.
[14]Meski S,Ziani S,Khireddine H.Removal of lead ions by hydroxyapatite prepared from the egg shell[J].Journal of Chemical and Engineering Data,2010,55(9):3923–3928.
[15]刘涛,朱林,薛建民,等.江苏省燃煤电厂脱硫石膏排放利用状况及综合利用对策[J].江苏电机工程,2013,32(2):10–14.
[16]Ho Y S.Citation review of Lagergren kinetic rate equation on adsorption reaction[J].Scientometrics,2004,59(1):171–177.
[17]Gómez del R?o?J A,Morando P J,Cicerone D S.Natural materials for treatment of industrial effluents:comparative study of the retention of Cd,Zn and Co by calcite and hydroxyapatite.Part I:batch experiments[J].Journal of Environmental Management,2004,7:169–177.
[18]Lin K,Pan J,Chen Y,et al.Study the adsorption of phenol from aqueous solution on hydroxyapatite nanopowders[J].Journal of Hazardous Materials,2009,161:231–240.
[19]Ho Y S.Review of second order models for adsorption systems[J].Journal of Hazardous Materials,2006,B136(3):681–689.
[20]包汉峰,杨维薇,张立秋,等.污泥基活性炭去除水中重金属离子效能与动力学研究[J].中国环境科学,2013,33(1):69–74.
[21]Zhang J,Shan W,Ge J,et al.Kinetic and Equilibrium Studies of Liquid-Phase Adsorption of Phosphate on Modified Sugarcane Bagasse[J].Journal of Environmental Engineering,2012,138(3):252–258.
[22]高淑玲,杨翠玲,罗鑫圣,等.坡缕石黏土污泥对水相中亚甲基蓝吸附研究[J].中国环境科学,2014,34(1):78–84.
[23]陈颖,杨朝晖,李小江,等.茶树菇废菌体对水中Cr(VI)吸附的响应面优化及机理研究[J].环境科学学报,2010,30(8):1593–1600.
[24]Yan Y,Dong X,Sun X,et al.Conversion of waste FGD gypsum into hydroxyapatite for removal of Pb2+and Cd2+from wastewater[J].Journal of Colloid and Interface Science,2014,429:68–76.
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[26]张秀蓉,龚继来,曾光明,等.磁性氧化石墨烯制备及去除水中刚果红的研究[J].中国环境科学,2013,33(8):1379–1385.
[27]Mobasherpour I,Salahi E,Pazouki M.Comparative of the removal of Pb2+,Cd2+and Ni2+by nano crystallite hydroxyapatite from aqueous solutions:Adsorption isotherm study[J].Arabian Journal of Chemistry,2012,5:439–446.
[28]Hao Y M,Chen M,Hu Z B.Effective removal of Cu(II)ions from aqueous solution by amino-functionalized magnetic nanoparticles[J].Journal of Hazardous Materials,2010,184(1–3):392–399.
[29]张萌,邱琳,于晓晴,等.亚铁盐除磷工艺的优化研究[J].中国环境科学,2012,32(7):1223–1227.
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