改性粉煤灰吸附十二烷基硫酸钠的研究

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英文篇名：Adsorption of Sodium Dodecyl Sulfate by Modified Fly Ash 作者：付凯 ; 刘志红 ; 耿超 ; 贾子龙 ; 肖域 英文作者：FU Kai;LIU Zhihong;GENG Chao;JIA Zilong;XIAO Yu;Mining College, Guizhou University;National & Local Joint Laboratory of Engineering for Effective Utilization of Regional Mineral Resources from Karst Areas;Guizhou Province Key Laboratory of Non-metallic Mineral Resources Comprehensive Utilization; 关键词：改性粉煤灰 ; 吸附 ; 废水 ; 十二烷基硫酸钠 英文关键词：modified fly ash;;adsorption;;waste water;;sodium dodecyl sulfate 中文刊名：KCBH 英文刊名：Conservation and Utilization of Mineral Resources 机构：贵州大学矿业学院;喀斯特地区优势矿产资源高效利用国家地方联合工程实验室;贵州省非金属矿产资源综合利用重点实验室; 出版日期：2019-03-12 16:03 出版单位：矿产保护与利用 年：2019 期：v.39;No.219 基金：国家科技支撑计划项目(2013BAC15B01) 语种：中文; 页：KCBH201901019 页数：6 CN：01 ISSN：41-1122/TD 分类号：96-100+105

摘要

通过对粉煤灰改性,研究改性粉煤灰对磷矿浮选药剂十二烷基硫酸钠的吸附性能,为磷矿浮选废水中有机药剂的去除提供依据。采用X射线衍射仪分析粉煤灰焙烧前后的成分,扫描电镜观察改性前后表面形貌,粉煤灰在350℃焙烧后形成更多的孔道。改性后的粉煤灰吸附十二烷基硫酸钠,进行用量、pH、温度和时间的吸附试验。采用准一级动力学模型、准二级动力学模型、Bangham孔道扩散模型和Weber and Morris(W-M)动力学模型进行吸附动力学分析,可知该吸附符合准二级动力学和W-M动力学模型。采用Langmuir和Freundlich等温模型对吸附等温线进行分析,可知粉煤灰表面具有不均匀性,该吸附属于优惠吸附。
        The adsorption performance of modified fly ash on sodium dodecyl sulfate which is a flotation reagent for phosphate rock was studied. It could provide a basis for the removal of organic reagents from phosphate ore floatation wastewater. The chemical composition of fly ash before and after calcination was analyzed by X-ray diffractometer. The surface morphology of fly ash before and after modification was observed by scanning electron microscope. It was found that more pores were formed after roasting of fly ash in 350 ℃. Sodium dodecyl sulfate was adsorbed by modified fly ash, and the adsorptive experiments of dosage, pH, temperature and time were carried out. Pseudo-first-order dynamic model, pseudo-second-order dynamic model, Bangham pore diffusion model and Weber and Morris(W-M) dynamic model were used to analyze the adsorption kinetics. It was found that the adsorption conformed to the pseudo-second-order dynamic model and the W-M dynamic model. And the adsorption isotherms were analyzed by Langmuir and Freundlich isothermal models. It was found that the surface of fly ash was inhomogeneous, and the adsorption was a preferential adsorption.

引文

[1] 石建稳,陈少华,王淑梅,等.粉煤灰改性及其在水处理中的应用进展[J].化工进展,2008(3):326-334.
    [2] 王华,宋存义,张强.粉煤灰改性吸附材料及其吸附机理[J].粉煤灰综合利用,2000(4):37-41.
    [3] 吴幼权.粉煤灰改性及其吸附性能研究[D].重庆:重庆大学,2006.
    [4] SHARMA Y C, SINGH S N, PARAS, et al. Fly ash for the removal of Mn(II) from aqueous solutions and wastewaters[J]. Chemical engineering journal, 2007,132(1):319-323.
    [5] 王奕晨,张生军,田士东,等.粉煤灰酸法改性及其对焦化废水深度处理的实验研究[J].煤化工,2018(2):62-65.
    [6] 罗金洋,张覃,李龙江.中低品位硅钙质磷矿石双反浮选试验研究[J].矿产保护与利用,2018(2):57-62.
    [7] 赵辉.选矿废水回用对磷矿浮选的影响研究[D].贵阳:贵州大学,2017.
    [8] 十二烷基硫酸钠在宜昌磷矿浮选小试验的应用[J].化工矿山技术,1975(1):36-38.
    [9] WANG S, LI H. Dye adsorption on unburned carbon: kinetics and equilibrium[J]. Journal of hazardous materials, 2005,126(1):71-77.
    [10] LI Xianbo, YE Junjian, QIU Yueqin, et al. Adsorption of residual amine collector HAY from aqueous solution by refined carbon from coal fly ash and activated carbon[J]. Journal of central South University, 2017,24(1):30-38.
    [11] 赵振国.吸附作用应用原理[J].热能动力工程,2005(6):631.
    [12] Costa E D, Zarbin A J G, Peralta-Zamora P. Multivariate optimisation of TiO2 /carbon nanocomposites for photocatalytic degradation of a reactive textile dye[J]. Materials research bulletin, 2013,48(2):581-586.
    [13] 王宜辰.Freundlich吸附等温式的理论推导[J].鲁东大学学报(自然科学版),1993(4):76-78.