微波改性活性炭深度处理甲基橙染料废水的性能研究
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摘要
活性炭吸附法是深度处理染料废水的主要方法之一。本研究采用微波技术对活性炭(GAC)进行改性处理,并对活性炭和微波改性活性炭(W-GAC)进行表征分析。以甲基橙溶液作为处理对象,将CODCr降解率作为吸附效果的评价指标,考察了各种吸附工况条件对吸附性能的影响。结果表明:W-GAC较GAC的比表面积与总孔容略有减小,WGAC酸性含氧的部分减少明显,碱性基团的含量是GAC的1.63倍,非极性变大,提高了改性活性炭对染料分子的吸附容量。在最佳工况条件下,W-GAC处理甲基橙废水的CODCr降解率较GAC提高了53.2%;吸附反应属于Lagergren准二级反应,相关系数R2值都在0.99以上。
Adsorption by activated carbon is a major advanced treatment on dye wasterwater.In this study, the modification of activated carbon by microwave was applied. The physicochemical characterization of activated carbon(GAC) and activated carbon modified by microwave(W-GAC) were processed. We treat methyl orange solution as object and the t removal rate of CODCr as indicatorsand inspect the influence of operating conditions on adsorption. The results showed that the specific surface area and total pore volume of GAC reduced slightly and the acidic oxygen groups decreased significantly while the alkaline groups increased. Under the optimal operation conditions, the adsorption performance of W-GAC on removal rate of CODCr increased by 53.2 %. Adsorption reaction were fitted well with Lagergren pseudo-secondary,all the correlation coefficients R2 higher than 0.99.
Adsorption by activated carbon is a major advanced treatment on dye wasterwater.In this study, the modification of activated carbon by microwave was applied. The physicochemical characterization of activated carbon(GAC) and activated carbon modified by microwave(W-GAC) were processed. We treat methyl orange solution as object and the t removal rate of CODCr as indicatorsand inspect the influence of operating conditions on adsorption. The results showed that the specific surface area and total pore volume of GAC reduced slightly and the acidic oxygen groups decreased significantly while the alkaline groups increased. Under the optimal operation conditions, the adsorption performance of W-GAC on removal rate of CODCr increased by 53.2 %. Adsorption reaction were fitted well with Lagergren pseudo-secondary,all the correlation coefficients R2 higher than 0.99.
引文
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[2]谭艺,林亲铁.印染废水深度处理与回用技术研究进展[J].广东化工,2009,36(10):132-133.
[3]金晶,汪永辉.印染废水深度处理回用技术[J].中国资源综合利用,2005,8:14-17.
[4]张乐忠,胡家朋,赵升云,刘俊劭.活性炭改性研究新进展[J]材料导报,2009,23(11):435-438
[5]韩菊.密封消解法测定COD的方法研究[J].河北工业科技,2009,26(6):464-470.
[6]龚兵丽,邱宇平,赵雅萍,等.黑碳吸附亚甲基蓝染料废水的行为研究[J].环境科学与技术,2009,32(11):18-23
[7]丁春生,毛凌俊,吴杰,沈嘉辰.微波改性活性炭深度处理亚甲基蓝染料废水的研究[J].工业水处理,2015,01:68-71+96.
[8]张佳.中孔活性炭的化学改性及其对Pb2+的吸附性能研究[D].南京:南京理工大学2007.
[9]毛磊,童仕唐,王宇.对用于活性炭表面含氧官能团分析的Boehm滴定法的几点讨论[J].炭素技术,2011,2(30):17-19.
[10]Dimit rova SV.Metal sorption on blust-furnance slag[J].Water Res,1996,30:228-332.
[11]彭书传,王诗生,陈天虎,等.坡缕石对水中亚甲基兰的吸附动力学[J].硅酸盐学报,2006,34(6):733-738.
[12]MOHAN D.GUPTA V K,SRIVASTAVA S K,SRIVASTAVA S K,et al.Kinetics of mercury adsorption from wastewater using activated carbon derived from fertilizer waste[J].Collide and Surfaces(A):Physicochemical and Engineering Aspects,2003,52(2/3):835-841.