活性炭固定床对苯酚废水的动态吸附研究
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摘要
研究了活性炭固定床对水中苯酚的动态吸附特性及影响因素。结果表明,活性炭对苯酚废水的动态吸附随进水苯酚含量和流量的增大穿透时间缩短,但最大设计体积流量不能超过6.47 m L/min;随固定床高度增加,穿透时间推迟,但最小设计高度不能小于8 cm。无效层厚度随进水流量和固定床高度的增加而增大,随进水苯酚含量增大而减少。经拟合发现实验结果更符合Yoon-Nelson模型,且相关系数都在0.9以上。
The dynamic adsorption characteristics of phenol in water and influencing factors by activated carbon fixed bed were investigated. The results indicated that the penetration time of phenol was shorten with the increase of initial phenol content and flow rate, but maximum design volume flow rate could not more than 6.47 m L/min. And the penetration time was prolonged with the increase of fixed bed height, but the smallest design height of fixed bed could not less than 8 cm. Invalid layer thickness became thicker with the increase of flow rate and fixed bed height, but it got shorter with the increase of initial phenol content. Fitting analysis of experimental data, the experimental results fit the Yoon-Nelson model, and all the correlation coefficients were over 0.9.
The dynamic adsorption characteristics of phenol in water and influencing factors by activated carbon fixed bed were investigated. The results indicated that the penetration time of phenol was shorten with the increase of initial phenol content and flow rate, but maximum design volume flow rate could not more than 6.47 m L/min. And the penetration time was prolonged with the increase of fixed bed height, but the smallest design height of fixed bed could not less than 8 cm. Invalid layer thickness became thicker with the increase of flow rate and fixed bed height, but it got shorter with the increase of initial phenol content. Fitting analysis of experimental data, the experimental results fit the Yoon-Nelson model, and all the correlation coefficients were over 0.9.
引文
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[16]GOEL J,KADIRVELU K,WANG C C.Removal of lead(II)by adsorption using treated granular activated carbon:Batch and column studies[J].Journal of Hazards Materials,2005,125(1/3):211-220.
[17]李方文,吴小爱,许中坚,等.涂铁多孔陶瓷对水中亚甲基蓝的动态吸附[J].环境工程学报,2009,3(3):385-390.
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[2]朱志军.含酚废水的处理与应用[J].一重技术,2005(5):64-65.
[3]周文敏,傅德黔,孙崇光.水中优先控制污染物黑名单[J].中国环境监测,1990,6(4):1-3.
[4]王秀芳,张会平,肖新颜,等.苯酚在竹炭上的吸附平衡和动力学研究[J].功能材料,2005,36(5):746-749.
[5]国家环境保护总局《水和废水监测分析方法》编委会.水和废水监测分析方法[M].4版.北京:中国环境科学出版社,2002.
[6]王贵珍,李丽欣,李永真,等.毛竹活性炭制备及其对含苯酚废水吸附的研究[J].高校化学工程学报,2010,24(4):700-704.
[7]BANAT F A,AL-BASHIR B,AL-ASHEHS S et al.Adsorption of phenol by bentonite[J].Environmental Pollut,2000,107(3):391-398.
[8]邵琰,鄢瑛,张会平.苯酚在活性炭复合材料结构化固定床上的吸附动力学[J].新型碳材料,2015,30(3):269-274.
[9]朱江涛,黄正宏,康飞宇,等.活性竹炭对苯酚的吸附动力学[J].新型碳材料,2008,23(4):326-330.
[10]ANA M C B,FEMENDO G,LILINAN G,et al.Adsorption of phenol and 2,4,-dinitrophenol on activated carbons with surface modifications[J].Microporus and Mesoporus Materials.2015,209:150-156.
[11]水质挥发酚的测定4-氨基安替比林分光光度法:HJ 503-2009[S].
[12]刘剑,鄢瑛,张会平.甲苯在固定化吸附床上的吸附性能研究[J].材料导报B:研究篇,2014,28(4):44-47.
[13]YOON Y H.NELSON J H.Application of gas adsorption kinetics:I.A theoretical model for respirator cartridge service life[J].American Industrial Hygiene Association Journal,1984,45(8):509-516.
[14]YANG H,CAHELA D R,TATARCHUK B J.A study of kinetic effects due to using microfibrous entrapped zinc oxide sorbents for hydrogen sulfide removal[J].Chemical Engineering Science,2008,63(10):2707-2716.
[15]COONEY D O.Adsorption design for wastewater treatment[M].5th ed.New York:CRC Press LLC,1999.
[16]GOEL J,KADIRVELU K,WANG C C.Removal of lead(II)by adsorption using treated granular activated carbon:Batch and column studies[J].Journal of Hazards Materials,2005,125(1/3):211-220.
[17]李方文,吴小爱,许中坚,等.涂铁多孔陶瓷对水中亚甲基蓝的动态吸附[J].环境工程学报,2009,3(3):385-390.
[18]龙腾,易筱筠,党志.改性花生壳对水中镉的动态吸附研究[J].环境科学,2012,33(9):3177-3181.
[19]孙晓峰,高乃云,徐斌,等.邻苯二甲酸二甲酯在颗粒活性炭中的穿透特性[J].环境科学,2007,28(8):1738-1745.
[20]ZHANG X P,ZHAO X,HU J Q,et al.Adsorption dynamics oftrichlorofluoro-methane in activated carbon fiber bed[J].Journal of Hazardous Materials,2011,186(2/3):1816-1822.
[21]TSAI W T,CHANG C Y,HO C Y,et al.Simplified description of adsorption breakthrough curves of 1,1-dichloro-1-fluoroethane(HCFC-141b)on activated carbon with temperature effect[J].Journal of Colloid and Interface Science,1999,214(2):455-45.