改性玉米芯对水中2,4,6-三氯酚的吸附研究
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摘要
通过化学改性的玉米芯(MC),用于去除水中的2,4,6-三氯酚(TCP)。研究了吸附的影响因素,确定了最优的实验条件。研究表明,298 K下,MC对初始浓度为225 mg/L的TCP溶液中TCP的平衡吸附量达到215.4 mg/g。吸附动力学符合准二级动力学模型,吸附等温式符合Temkin模型。改性玉米芯可有效去除水中的TCP,是一种有应用潜力的吸附材料。
Modified corncob(MC) by chemical method was used for remove the 2,4,6-trichlorophenol(TCP) in the solution.The effects of various experimental parameters were examined and optimal experimental conditions were determined.The adsorption capacity of TCP on MC was up to 215.4 mg/g when initial concentration of TCP solution was 225 mg/L at 298 K.Adsorption kinetics followed the pseudo-second-order equation in the concentration range studied.Equilibrium isotherm data were satisfactorily fitted by the Temkin equation.This study confirmed that modified corncob was an excellent attractive adsorbent for removal of TCP from aqueous solution.
Modified corncob(MC) by chemical method was used for remove the 2,4,6-trichlorophenol(TCP) in the solution.The effects of various experimental parameters were examined and optimal experimental conditions were determined.The adsorption capacity of TCP on MC was up to 215.4 mg/g when initial concentration of TCP solution was 225 mg/L at 298 K.Adsorption kinetics followed the pseudo-second-order equation in the concentration range studied.Equilibrium isotherm data were satisfactorily fitted by the Temkin equation.This study confirmed that modified corncob was an excellent attractive adsorbent for removal of TCP from aqueous solution.
引文
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[19] 才洪美,潘建明.(壳聚糖/γ-Fe2O3)@C磁性复合材料表面印迹聚合物选择性吸附2,4,5-TCP的研究[J].现代食品科技,2017,33(5):135-140.
[20] Ren L,Zhang J,Li Y,et al.Preparation and evaluation of cattail fiberbased activated carbon for 2,4-dichlorophenol and 2,4,6-trichlorophenol removal[J].Chem Eng J,2011,168:553-561.
[21] 韦学玉,刘志刚,徐晓平.纳米零价铁磁性生物炭对水中2,4,6-三氯酚吸附机理及动力学研究[J].河南城建学院学报,2016,25(5):73-77.
[2] Hammed B H.Equilibrium and kinetics studies of 2,4,6-trichlorophenol adsorption onto activated clay[J].Colloids and Surfaces A:Physicochemical and Engineering Aspects,2007,307(1):45-52.
[3] Abbas H A,Tarek S Jamil,Hammad F F.Synthesis,characterization and photocatalytic activity of nano sized undoped and Ga doped SrTi0.7Fe0.3O3 for 2,4,6-trichlorophenol photodegradation[J].Journal of Environmental Chemical Engineering,2016,4(2):2384-2393.
[4] 林世静,张龙,佟拉嘎,等.钴铈复合氧化物催化降解2,4,6-三氯酚[J].化学工业与工程,2017,34(2):10-15.
[5] 尹晋,程方,苏润西,等.载铁改性活性炭纤维电极电吸附水中2,4,6-三氯酚[J].水处理技术,2018,44(7):49-53.
[6] 马培,张庆甫,吴佳,等.NaOH预处理香菇废弃物对铜、锌吸附性能研究[J].工业安全与环保,2018,44(7):92-95.
[7] 李德强,李君,张玲.农业废弃物活性炭制备及其对染料废水的吸附研究进展[J].工业用水与废水,2018,49(3):1-5.
[8] Li Ning,Xiong Xiaoli,Shao Chenbin,et al.Adsorption of p-chlorophenol from aqueous solution on modified corncob[J].Fresenius Environmental Bulletin,2011,20(3a):747-753.
[9] Vaughan T,Seo C W,Marshall W E.Removal of selected metal ions from aqueous solution using modified corncobs[J].Bioresour Technol,2001,78:133-139.
[10] Wang A L,Wang Y,Jiang T Y,et al.Production of 2,3-butanediol from corncob molasses,a waste by-product in xylitol production[J].Applied Microbiology and Biotechnology,2010,87(3):965-970.
[11] Wu F C,Tseng R L,Juang R S.Adsorption of dyes and phenols from water on the activated carbons prepared from corncob wastes[J].Environ Technol,2001,22:205-213.
[12] Tan G,Yuan H,Liu Y,et al.Removal of lead from aqueous solution with native and chemically modified corncobs[J].Hazard Mater,2010,174:740-745.
[13] Risio S D,Yan N.Adsorption and inactivation behavior of horseradish peroxidase on various substrates[J].Colloids Surf B,2010,79:397-402.
[14] 李宁,熊晓莉,赵文哲.环糊精聚合物对苯胺的吸附和脱附性能研究[J].环境工程学报,2009,3(12):2215-2218.
[15] 林玉锁.Langmuir,Temkin和Freundlich方程应用于土壤吸附锌的比较[J].土壤,1994(5):269-272.
[16] Ho Y S,McKay G.Pseudo-second-order model for sorption processes[J].Process Biochem,1999,34:451-465.
[17] 梅征.新型环糊精聚合物的合成及对水中污染物的吸附[D].重庆:重庆工商大学,2012.
[18] Li Ning,Mei Zheng,Wei Xingyue.Study on sorption of chlorophenols from aqueous solutions by an insoluble copolymer containing β-cyclodextrin and polyamidoamine units[J].Chemical Engineering Journal,2012,192:138-145.
[19] 才洪美,潘建明.(壳聚糖/γ-Fe2O3)@C磁性复合材料表面印迹聚合物选择性吸附2,4,5-TCP的研究[J].现代食品科技,2017,33(5):135-140.
[20] Ren L,Zhang J,Li Y,et al.Preparation and evaluation of cattail fiberbased activated carbon for 2,4-dichlorophenol and 2,4,6-trichlorophenol removal[J].Chem Eng J,2011,168:553-561.
[21] 韦学玉,刘志刚,徐晓平.纳米零价铁磁性生物炭对水中2,4,6-三氯酚吸附机理及动力学研究[J].河南城建学院学报,2016,25(5):73-77.