郑曼迪,熊黑钢,伊元荣
Zheng Mandi,Xiong Heigang,Yi Yuanrong

• 1:新疆大学资源与环境科学学院
• 2:教育部绿洲生态重点实验室
• 3:北京联合大学应用文理学院城市系

摘要(Abstract)：

以粉煤灰为吸附材料,利用硝酸铅试剂模拟含铅离子废水,探讨了吸附时间、pH、温度、投灰量、离子浓度5个因素对粉煤灰吸附铅离子效率的影响,并拟合出不同条件下的最佳吸附模型.单因素分析结果表明,当实验条件分别为吸附时间90min、pH=6.0、温度50℃、投灰量5.0g、离子浓度30mg/L时吸附效果最好,吸附效率均超过98%.吸附时间、pH值、投灰量3种影响因子所建立的粉煤灰吸附铅离子方程均以二次多项式表示为最佳,回归系数R~2均超过0.83,而温度和离子浓度所建立的方程中,前者以三次多项式精度最高,R~2可达0.86;后者则以对数形式拟合最好,R~2为0.93.实验中拟合粉煤灰吸附铅离子过程Langmuir模型的R~2比Freundich模型的R~2大0.602,所以其更适用于Langmuir单分子层吸附模型.
Taking advantage of lead nitrate reagent simulated as wastewater containing lead ion,this used fly ash as the adsorption material.The purpose of this study is evaluating the influence of efficiency of lead ion absorption about five factors,such as adsorption time,pH,temperature,ash content and ion concentration,and fitting out the best adsorption model under different conditions.The result of single factor analysis showed that the efficiency of adsorption was the best in the experimental condition of 90 min adsorption time,pH=6.0,50 ℃,5.0 g fly ash or 30 mg/L ion concentration,which was more than 98%.The best fly ash adsorption equation was modeled by adsorption time,pH,ash content as quadratic polynomial,and regression coefficient R~2 were all more than 0.83.The highest precision of temperature equation was using the form of cubic polynomial,regression coefficient R~2 was 0.86;and the equation of ion concentration fit in logarithmic form was the best and the value of R~2 was 0.93.In the experiment,the value of R~2 of the Langmuir model was more than Freundich model of 0.602,so the Langmuir monolayer adsorption model was more suitable for process of absorbing lead ion.

关键词(KeyWords)： 粉煤灰;吸附率;铅;吸附方程
fly ash;the adsorption rate;lead;adsorption equation

Abstract:

Keywords:

基金项目(Foundation): 国家自然科学基金(41671198)

作者(Author): 郑曼迪,熊黑钢,伊元荣
Zheng Mandi,Xiong Heigang,Yi Yuanrong

DOI: 10.16366/j.cnki.1000-2367.2018.02.010

参考文献(References)：

• [1]张娟,邓慧萍,薮谷智规,等.新型磁性聚谷氨酸吸附剂对水中Pb2+的吸附去除[J].环境科学,2011,32(11):3348-3356.
• [2]Mountouris A,Voutasa E,Tassios D.Bioconcertration of heavy metals in aquatic environments:the importance of bioavailability[J].Marine Pollution Bulletin,2002,44(10):1136-1141.
• [3]Muller Y M R,Kobus K,Schatz J C,et al.Prenatal leadacetate exposure induces apoptosis and changes GFAP expression during spinalcord development[J].Ecotoxicology and Environment safety,2012,75:223-229.
• [4]Tiwari M,Sahu S K,Bhangage R C,et al.Elemental characterization of coal,fly ash,and bottom ash using energy dispersive X-ray fluorescence technique[J].Applied Radiation and Isotopes,2014,90:53-57.
• [5]杨利香,施钟毅.“十一五”我国粉煤灰综合利用成效及其未来技术方向和发展趋势[J].粉煤灰,2012,24(4):4-9.
• [6]Bereket G,Aroguz A Z,OZEL MZ.Removal of Pb(Ⅱ),Cd(Ⅱ),Cu(Ⅱ),Zn(Ⅱ)from aqueous solutions by adsorption on bentonite[J].Journal of Colloid and Interface Science,1997,187,338-343.
• [7]程婷,陈晨,许文静,等.粉煤灰合成沸石对重金属铅与镍的吸附性能研究[J].粉煤灰综合利用,2016,25(5):11-16.
• [8]李静,李鸿达,宋蕾.等.微生物絮凝剂与粉煤灰联合处理水中Pb2+的响应面优化[J].材料保护,2017,50(5):105-109.
• [9]宋祎楚,冀晓东,柯瑶瑶,等.粉煤灰合成沸石对Cr2+的去除能力及影响因素研究[J].环境科学学报,2015,35(12):3847-3854.
• [10]何婵,粉煤灰超细改性及其吸附性能研究[D].西安:西安科技大学,2008.
• [11]王剑锋,张金利,杨庆.粉煤灰对Cr(Ⅵ)的吸附特性[J].环境工程学报,2014,8(11):4593-4599.
• [12]李萍,赵庚星,高明秀,等.黄河三角洲土壤含水量状况的高光谱估测与遥感反演[J].土壤学报,2015,06(52):1262-1271.
• [13]孙贤斌,刘红玉,李玉成.粉煤灰对重金属Cu2+和Zn2+吸附作用研究[J].农业环境科学学报,2007,26(5):1988-1991.
• [14]Janos P,Buchtova H,Ryznarova M.Sorption of dyes from aqueous solutions onto fly ash[J].Water Res,2003,37:4938-4944.
• [15]吴幼权.粉煤灰改性及其吸附性能研究[D].重庆:重庆大学.2006.
• [16]杨小勇.方差分析法浅析—单因素的方差分析[J].实验科学与技术,2013,11(1):41-43.
• [17]Namasivayam C,Yamuna R T,Jayanthi J.Removal of methylene blue from waste water by adsorption on cellulosic waste,orange peel[J].Cellulose Chemistry and Technology,2003,37(7):333-339.
• [18]Hui K S,Chao C Y H,Kot S C.Removal of mixed heavy metal ions in waste water by zeolite 4Aand residual products from recycled coal fly ash[J].Journal of Hazardous Materials,2005,127B(1-3):89-101.
• [19]相波,李义久.吸附等温式在重金属吸附性能研究中的应用[J].有色金属,2007,59(1):77-80.
• [20]Behera S K,Kim J H,Guo X,et al.Adsorption equilibrium and kinetics of polyvinyl alcohol from aqueous solution on powdered activated carbon[J].Journal of Hazardous Materials,2008,153(3):1207-1214.