酸改性兰炭基活性炭吸附焦化废水中COD研究

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英文篇名：Adsorption of COD in Coking Wastewater on Acid Modified Blue Coke-Based Activated Carbon 作者：蒋绪 ; 兰新哲 ; 宋永辉 ; 邢相栋 英文作者：Jiang Xu;Lan Xinzhe;Song Yonghui;Xing Xiangdong;Shaanxi Province Metallurgical Engineering and Technology Research Centre, School of Metallurgical Engineering, Xi`an University of Architecture and Technology;Research Institute of Energy and Chemical Industry, Xianyang Vocational Technical College; 关键词：酸改性 ; 兰炭基活性炭 ; 焦化废水 ; 吸附 英文关键词：acid modified;;blue coke-activated carbon;;coking wastewater;;adsorption 中文刊名：FJSK 英文刊名：Non-Metallic Mines 机构：西安建筑科技大学冶金工程学院陕西冶金工程技术研究中心;咸阳职业技术学院能源化工研究所; 出版日期：2019-05-20 出版单位：非金属矿 年：2019 期：v.42;No.254 基金：陕西省教育厅专项(17JK1170);; 咸阳市科学技术研究攻关计划项目(2018k02-19);; 咸阳职业技术学院科学技术研究项目(2017KYA02) 语种：中文; 页：FJSK201903026 页数：4 CN：03 ISSN：32-1144/TD 分类号：102-105

摘要

用酸改性兰炭基活性炭对焦化废水进行吸附处理,研究了酸的种类、吸附剂投加量、转速等因素对COD去除率的影响,对吸附等温线、吸附动力学和热力学特征进行了探讨。结果表明:经酸改性后,兰炭基活性炭能显著提升对焦化废水的吸附效果,无机酸改性较有机酸更好,硝酸改性效果最佳。318 K条件下,在50 mL焦化废水中加入4 g硝酸改性后的兰炭基活性炭,以100 r/min的转速吸附90 min后,COD去除率可达86.79%;Langmuir等温吸附模型能更好地描述吸附过程,热力学参数ΔG~θ<0、ΔH~θ>0、ΔS~θ>0,表明吸附为自发吸热的单分子层吸附过程,且吸附动力学可用拟二级动力学模型描述。
        The blue coke-activated carbon(BAC) modified by the different kinds of acids was used as adsorbent to remove COD from coking wastewater, factors such as acid species, adsorbent dosage and shaking speed which affect COD removal rate of coking wastewater were investigated.In addition, the process of adsorption were fitted by both adsorption isotherm model and adsorption kinetics model. The results showed that the COD removal rate was enhanced after acid modified, the adsorption capacity of inorganic acid modified BAC was better than that of organic acid one, and nitric acid modified was best. The COD removal rate was to reach 86.79% when 4 g nitric acid modified BAC was added into 50 mL coking wastewater in 90 min with shaking speed of 100 r/min at 318 K. Langmuir model could better describe equilibrium adsorption and thermodynamic parameters indicated that the adsorption was spontaneous, endothermic. The kinetic study showed that the adsorption process was best fitted by the pseudo-second order kinetics model.

引文

[1]韦朝海,贺明和,任源,等.焦化废水污染特征及其控制过程与策略分析[J].环境科学学报,2007,27(7):1083-1093.
    [2]宋永辉,汤洁莉.煤化工工艺学[M].北京:化学工业出版社,2017:364.
    [3]SEREDYCH M,BANDOSZ T J.Adsorption of dibenzothiophenes on nanoporous carbons:Identification of spectific adsorption sites governing capacity and selectivit[J].Energy Fuel,2010,24(6):3352-3360.
    [4]CHEN J P,WU S N,KAIHAU C.Surface modification of a granular activated carbon by citric acid for enhancement of copper adsorption[J].Carbon,2003,41(10):1979-1986.
    [5]宋永辉,张蕾,蒋绪,等.兰炭末水蒸气活化制备活性炭过程中反应温度的影响[J].煤炭转化,2017,40(5):56-62.
    [6]佟莉,徐文青,亓昊,等.硝酸改性活性炭上氧/氮官能团对脱汞性能的促进作用[J].物理化学学报,2015,31(3):512-518.
    [7]高雯雯,弓莹,高艳宁,等.负载铈-锰活性炭对兰炭废水的吸附研究[J].硅酸盐通报,2017,36(1):197-204.
    [8]刘剑,朱秋香,谭雄文,等.改性活性炭对甲基橙的吸附[J].过程工程学报,2016,16(2):222-227.
    [9]何建玲.新型吸附树脂对苯乙酸的吸附热力学研究[J].离子交换与吸附,2004,20(2):131-137.
    [10]高雯雯,苏婷,弓莹,等.载铜活性炭对焦化废水的吸附性能研究[J].非金属矿,2016,39(1):40-43.
    [11]MEKATEL E H,AMOKRANE S,AID A.Adsorption of Methyl Orange on Nanoparticles of a Synthetic Zeolite NaA/CuO[J].Comptes Rendus Chimie,2015,18(3):336-344.
    [12]MARYAM A T,TORAJ M.Adsorption of divalent heavy metal ions from water using carbon nanotube sheets[J].Journal of Hazardous Materials,2011,185(1):140-147.