牛皮铬复鞣废液中铬处理的研究
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摘要
对单独回收的实际生产的铬复鞣废液进行沉淀、破络和吸附试验,考察了不同方法去除铬的效果。试验结果表明:传统加碱沉淀法中CaO对铬的去除率可达99.13%。对于加碱沉淀脱铬不完全的废液,采用破络和吸附2种方法。破络效果较好的是Fenton试剂,控制n(Fe~(2+))∶n(H_2O_2)=1.4∶1,p H值在5.0左右,H2O2投加量为0.54g/L,总铬浓度为0.31mg/L,COD去除率为29.8%。吸附效果较好的是大理石粉,大理石粉静置反应1~2d吸附达平衡,最大铬去除率为89.46%。
The dechroming effects of different methods were researched by carrying out the precipitation,decomplexation and adsorption experiments of chrome retanning waste liquor individually recovered during actual production.The results show that the removal rate of Cr can reach 99. 13% with Ca O in the traditional alkali precipitation method.Two methods of decomplexation and adsorption were used for the incomplete chromium-free waste liquor after alkaline precipitation. The Fenton reagent has better decomplexation effect. The chromium concentration is 0. 31mg/L and COD removal rate is 29. 8% under the conditions of n( Fe~(2+)) ∶ n( H_2O_2) of 1. 4 ∶ 1,p H value around 5. 0,H_2O_2 dosage of 0. 54g/L. The marble powder has better adsorption effect. It would reach adsorption equilibrium after 1 ~2d standing reaction,and the maximum chromium removal rate is 89. 46%.
The dechroming effects of different methods were researched by carrying out the precipitation,decomplexation and adsorption experiments of chrome retanning waste liquor individually recovered during actual production.The results show that the removal rate of Cr can reach 99. 13% with Ca O in the traditional alkali precipitation method.Two methods of decomplexation and adsorption were used for the incomplete chromium-free waste liquor after alkaline precipitation. The Fenton reagent has better decomplexation effect. The chromium concentration is 0. 31mg/L and COD removal rate is 29. 8% under the conditions of n( Fe~(2+)) ∶ n( H_2O_2) of 1. 4 ∶ 1,p H value around 5. 0,H_2O_2 dosage of 0. 54g/L. The marble powder has better adsorption effect. It would reach adsorption equilibrium after 1 ~2d standing reaction,and the maximum chromium removal rate is 89. 46%.
引文
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[10]胡利珍,马宏瑞,王颖勃,等.制革鞣液中有机配体对Cr(Ⅲ)加碱沉淀行为的影响[J].环境化学,2014,33(2):350-354.
[11]Elabbas S,Mandi L,Berrekhis F,et al.Removal of Cr(Ⅲ)from chrome tanning wastewater by adsorption using two natural carbonaceous materials:Eggshell and powdered marble[J].Journal of Environmental Management,2015,11,012.
[12]刘新秀.电镀含铜模拟废水破络除铜技术研究[D].上海:华东理工大学,2014.
[13]Zhou Jianguo,Wang Yuefeng,Wang Jitong,et al.Effective removal of hexavalent chromium from aqueous solutions by adsorption on mesoporous carbon microspheres[J].Journal of Colloid and Interface Science,2016,462:200-207.
[14]李金花,白晶,黄可,等.彻底去除三价铬钝化废水中稳定络合态三价铬的研究[A].见:2013年海峡两岸(上海)电子电镀及表面处理学术交流会论文集.
[2]丁绍兰,秦宁.皮革废水治理技术研究进展[J].西部皮革,2009,31(19):25-29.
[3]王俊耀,苏海佳,谭天伟.制革厂铬鞣废水中铬的回收处理研究[J].环境工程学报,2007,1(1):23-26.
[4]Elabbas S,Mandi L,Berrrkhis F,et al.Removal of Cr(Ⅲ)from chrome tanning wastewater by adsorption using two natural carbonaceous materials:Eggshell and powdered marble[J].Journal of Environmental Management,2015:1-7.
[5]鲁秀国,黄燕梅,曹禹楠.氨基改性核桃壳对废水中Cr(Ⅵ)的静态吸附研究[J].离子交换与吸附,2014,30(6):491-498.
[6]Religa P,Kowalik A,Gierycz P.Application of nanofiltration for chromium concentration in the tannery wastewater[J].Journal of Hazardous Materials,2011,186(1):288-292.
[7]金赞芳,潘志彦,姚斌,等.制革污泥中铬回收技术的研究[J].中国皮革,2009,38(7):31-34.
[8]王敏,汪建根.预处理-化学沉淀-SBR工艺处理制革废水[J].皮革与化工,2009,26(4):28-31.
[9]罗亚红,何成刃,唐礼澎.加碱混凝沉淀法去除蓝皮革废水中Cr3+及COD的研究[J].环境科学与管理,2006,31(9):109-112.
[10]胡利珍,马宏瑞,王颖勃,等.制革鞣液中有机配体对Cr(Ⅲ)加碱沉淀行为的影响[J].环境化学,2014,33(2):350-354.
[11]Elabbas S,Mandi L,Berrekhis F,et al.Removal of Cr(Ⅲ)from chrome tanning wastewater by adsorption using two natural carbonaceous materials:Eggshell and powdered marble[J].Journal of Environmental Management,2015,11,012.
[12]刘新秀.电镀含铜模拟废水破络除铜技术研究[D].上海:华东理工大学,2014.
[13]Zhou Jianguo,Wang Yuefeng,Wang Jitong,et al.Effective removal of hexavalent chromium from aqueous solutions by adsorption on mesoporous carbon microspheres[J].Journal of Colloid and Interface Science,2016,462:200-207.
[14]李金花,白晶,黄可,等.彻底去除三价铬钝化废水中稳定络合态三价铬的研究[A].见:2013年海峡两岸(上海)电子电镀及表面处理学术交流会论文集.