钛白废酸活化制备污泥活性炭及其在榨菜废水处理中的应用
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摘要
以城市污水处理厂二沉池脱水污泥为原料,钛白废酸为活化剂,采用化学活化法制备污泥活性炭(PAC)。考察了固液比、炭化时间、炭化温度对制备污泥活性炭吸附性能的影响,并通过正交实验得出最佳制备参数。将该污泥活性炭用于榨菜废水的处理,结果表明,当投加量为15 g/L、pH为中性、振荡时间为120 min时,榨菜废水中COD和TP的去除率分别为73.6%和99.1%。该污泥活性炭对榨菜废水中COD的吸附符合Langmuir等温模型和准二级动力学与Elovich方程。
Sludge activated carbon is prepared through chemical activation method by using dewatered sludge from a municipal wastewater treatment plant as raw materials and waste acid from titanium dioxide production as an activator.The effects of the ratio of solid to liquid,carbonization time and carbonization temperature on the adsorption performance of the prepared sludge activated carbon are inspected. The optimum preparation parameters are obtained by orthogonal experimental design.This sludge activated carbon is then used to treat with mustard tuber wastewater. The results show that the removal rates of COD and TP in the mustard tuber wastewater can reach 73. 6% and 99. 1%,respectively when the dosage of sludge activated carbon is 15 g·L~(-1),pH locates at neutral level and oscillation time lasts for 120 min.The adsorption performance of the prepared sludge activated carbon against COD in the mustard tuber wastewater tallies with Langmuir isothermal model,quasi-second-order kinetic and Elovich equation.
Sludge activated carbon is prepared through chemical activation method by using dewatered sludge from a municipal wastewater treatment plant as raw materials and waste acid from titanium dioxide production as an activator.The effects of the ratio of solid to liquid,carbonization time and carbonization temperature on the adsorption performance of the prepared sludge activated carbon are inspected. The optimum preparation parameters are obtained by orthogonal experimental design.This sludge activated carbon is then used to treat with mustard tuber wastewater. The results show that the removal rates of COD and TP in the mustard tuber wastewater can reach 73. 6% and 99. 1%,respectively when the dosage of sludge activated carbon is 15 g·L~(-1),pH locates at neutral level and oscillation time lasts for 120 min.The adsorption performance of the prepared sludge activated carbon against COD in the mustard tuber wastewater tallies with Langmuir isothermal model,quasi-second-order kinetic and Elovich equation.
引文
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[7]覃理嘉,王东波,林荣科,等.Fenton活化制备污泥炭对水中Cr(Ⅵ)的吸附性能[J].环境工程学报,2017,11(9):5007-5012.
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[17]李航,张太亮,吕利平.钛白废酸耦合H2O2制备芬顿试剂对剩余污泥的减量研究[J].现代化工,2017(7):109-112.
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[23]成芳芳,孔庆山,纪全,等.海藻酸纤维对水溶液中Fe3+的吸附动力学研究[J].合成纤维工业,2010,33(2):1-4.
[2]西南石油大学.一种利用钛白废酸制备污泥活性炭的方法:中国,201710163677.0[P].2017-06-13.
[3]王家宏,张迪,尹小龙,等.污泥活性炭的制备及其对酸性红G的吸附行为[J].环境工程学报,2015,9(1):58-64.
[4]魏先勋,翟云波,曾光明,等.城市污水处理厂污泥资源化利用技术进展[J].环境工程学报,2003,4(10):10-13.
[5]张祖康.污水处理场废渣的减量和资源化[J].石油化工环境保护,2000,(3):1-5.
[6]何莹,舒威,廖筱锋,等.污泥-秸秆基活性炭的制备及其对渗滤液COD的吸附[J].环境工程学报,2015,9(4):1663-1669.
[7]覃理嘉,王东波,林荣科,等.Fenton活化制备污泥炭对水中Cr(Ⅵ)的吸附性能[J].环境工程学报,2017,11(9):5007-5012.
[8]Inguanzo M,Menéndez J A,Fuente E,et al.Reactivity of pyrolyzed sewage sludge in air and CO2[J].Journal of Analytical&Applied Pyrolysis,2001,58(58-59):943-954.
[9]Tay J H,Chen X G,Jeyaseelan S,et al.Optimising the preparation of activated carbon from digested sewage sludge and coconut husk[J].Chemosphere,2001,44(1):45-51.
[10]Li W H,Yue Q Y,Gao B Y,et al.Preparation of sludge-based activated carbon made from paper mill sewage sludge by steam activation for dye wastewater treatment[J].Desalination,2011,278(1-3):179-185.
[11]Tao H C,Zhang H R,Li J B,et al.Biomass based activated carbon obtained from sludge and sugarcane bagasse for removing lead ion from wastewater[J].Bioresource Technology,2015,192:611-617.
[12]Li Y,Li Y,Li L,et al.Preparation and analysis of activated carbon from sewage sludge and corn stalk[J].Advanced Powder Technology,2016,27(2):684-691.
[13]Rozada F,Calvo L F,García A I,et al.Dye adsorption by sewage sludge-based activated carbons in batch and fixed-bed systems[J].Bioresource Technology,2003,87(3):221-230.
[14]Martin M J,Artola A,Balaguer M D,et al.Activated carbons developed from surplus sewage sludge for the removal of dyes from dilute aqueous solutions[J].Chemical Engineering Journal,2003,94(3):231-239.
[15]Rio S,Faurbrasquet C,Le C L,et al.Experimental design methodology for the preparation of carbonaceous sorbents from sewage sludge by chemical activation-application to air and water treatments[J].Chemosphere,2005,58(4):423-437.
[16]阮林叶.钛白废酸回收技术研究[D].上海:华东理工大学,2011.
[17]李航,张太亮,吕利平.钛白废酸耦合H2O2制备芬顿试剂对剩余污泥的减量研究[J].现代化工,2017(7):109-112.
[18]范兵,李志广,李昭,等.硫酸法钛白废酸的处理[J].河南化工,2013,30(3,4):12-15.
[19]孙伟.水解酸化—SBR—混凝工艺处理榨菜废水试验研究[D].济南:山东建筑大学,2009.
[20]周健,曾朝银,龙腾锐,等.高盐高氮榨菜废水生物脱氮试验研究[J].环境科学学报,2005,25(12):1636-1640.
[21]曾朝银.高盐高氮高有机浓度榨菜废水脱氮除磷技术试验研究[D].重庆:重庆大学,2005.
[22]Aksu Z.Determination of the equilibrium,kinetic and thermodynamic parameters of the batch biosorption of nickel(Ⅱ)ions onto Chlorella vulgaris[J].Process Biochemistry,2002,38(1):89-99.
[23]成芳芳,孔庆山,纪全,等.海藻酸纤维对水溶液中Fe3+的吸附动力学研究[J].合成纤维工业,2010,33(2):1-4.