双金属-湿式氧化法去除垃圾渗滤液膜滤浓缩液中无机氮
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摘要
针对垃圾渗滤液膜滤浓缩液中高含量的NO_3~--N、NO_2~--N及NH_4~+-N同时存在的水质特点,采用Zn-Cd初步还原-湿式氧化法(WAO)深度除氮法(2步法)去除其中的无机氮。以模拟浓缩液为研究对象,探讨了3种形态的无机氮在处理过程中的转化规律及其影响因素,并将该方法用于实际浓缩液的处理。结果表明,通过Zn-Cd双金属使废水中的NO_3~--N转化为NO_2~--N,通过WAO作用使体系中的NO_2~--N与NH_4~+-N转化为氮气的方式可将废水中的3种无机氮有效去除。在适宜的条件下,该方法可将体系中97.10%的NO_3~--N转化为NO_2~--N;体系中的NO_2~--N和NH_4~+-N在WAO阶段的去除率分别达到99.03%和69.23%。将该方法用于实际浓缩液的处理时,其无机氮的总去除率达到72.00%以上。
Based on the water quality characteristics of landfill leachate membrane concentrates,the Zn-Cd bimetal/WAO coupling method was used to remove inorganic nitrogen(nitrate,nitrite,ammonia) from the membrane concentrates.The batch experiments of model wastewater have been conducted to investigate the transformation of inorganic nitrogen and its influence factors during the treatment.This method was also used for membrane concentrates denitrification process.The results showed that nitrate could be effectively reduced to nitrite by Zn-Cd bimetal.The inorganic nitrogen could be removed from wastewater by forming N_2 at WAO stage.The 97.10% nitrate was reduced to nitrite by Zn-Cd bimetal,the nitrite removal of 99.03% and ammonia removal of 69.23% were attained under optimal experimental conditions.The inorganic nitrogen removal above 72.00% was achieved when membrane concentrates were treated by this method.
Based on the water quality characteristics of landfill leachate membrane concentrates,the Zn-Cd bimetal/WAO coupling method was used to remove inorganic nitrogen(nitrate,nitrite,ammonia) from the membrane concentrates.The batch experiments of model wastewater have been conducted to investigate the transformation of inorganic nitrogen and its influence factors during the treatment.This method was also used for membrane concentrates denitrification process.The results showed that nitrate could be effectively reduced to nitrite by Zn-Cd bimetal.The inorganic nitrogen could be removed from wastewater by forming N_2 at WAO stage.The 97.10% nitrate was reduced to nitrite by Zn-Cd bimetal,the nitrite removal of 99.03% and ammonia removal of 69.23% were attained under optimal experimental conditions.The inorganic nitrogen removal above 72.00% was achieved when membrane concentrates were treated by this method.
引文
[1]高慧,王敏.垃圾渗滤液处理技术现状及展望[J].环境科学与技术,2010,33(6):198-200.
[2]HE L,SONG D B.Coagulation in the leachate treatment[J].Metallurgical Design and Research,2008(1):22-26.
[3]GB 16889-2008生活垃圾填埋场污染控制标准[S].
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[5]王耀龙,魏云霞,李晓丽,等.废水脱氮技术研究进展[J].环境工程,2010,28(S1):119-121.
[6]唐婧,屈姗姗,傅金祥,等.复合菌剂强化处理高盐废水脱氮效果[J].环境工程学报,2015,9(6):2700-2703.
[7]张燕,陈英旭,陈光浩.化学反硝化去除硝酸盐的试验研究[J].环境科学,2003,24(4):109-112.
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[9]张环,金朝晖,韩璐,等.负载型纳米铁化学反硝化法去除硝酸盐氮的研究[J].中国给水排水,2006,22(15):83-87.
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[12]GB 7480-87水质硝酸盐氮的测定酚二磺酸分光光度法[S].
[13]HJ 535-2009水质氨氮的测定纳氏试剂分光光度法[S].
[14]GB 7493-1987水质亚硝酸盐氮的测定分光光度法[S].
[15]GB 8969-1988空气质量氮氧化物的测定盐酸萘乙二胺比色法[S].
[16]康海彦.纳米铁系金属复合材料去除地下水中硝酸盐污染的研究[D].天津:南开大学,2007:32-33.
[17]李铁龙,孙丽莉,金朝晖,等.纳米铁系双金属复合材料还原水中硝酸盐氮[J].吉林大学学报:工学版,2009,39(2):362-367.
[18]LIOU Y H,LIN C J,HUNG I C,et al.Selective reduction of NO3-to N2with imetallic particles of Zn coupled with palladium,platinum,and copper[J].Chem Eng J,2012,181/182:236-242.
[19]LAURENCE D,OLEG B,DAVID R,et al.Cu-Ni materials prepared by mechanical milling:Their properties and electrocatalytic activity towards nitrate reduction in alkaline medium[J].J Alloys Compd,2007,432:323-332.
[20]RAMAVANDI B,MORTAZAVI S B,MOUSSAVI G,et al.Experimental investigation of the chemical reduction of nitrate ion in aqueous solution by Mg/Cu bimetallic particles[J].Reac Kinet Mech Cat,2011,102:313-329.
[21]汪昆平,刘苗苗,徐乾前,等.钯-铜负载活性炭催化还原去除水中硝酸盐研究[J].水处理技术,2011,37(10):55-56.
[22]付迎春.催化湿式氧化法处理氨氮废水的研究[D].南京:南京工业大学,2004,45-59.
[23]LIOU Y H,LO S L,LIN C J.Chemical reduction of an unbuffered nitrate solution using catalyzed and uncatalyzed nanoscale iron particles[J].Journal of Hazardous Materials,2005,127:102-110.
[2]HE L,SONG D B.Coagulation in the leachate treatment[J].Metallurgical Design and Research,2008(1):22-26.
[3]GB 16889-2008生活垃圾填埋场污染控制标准[S].
[4]Du R,Peng Y Z,Cao S B,et al.Advanced nitrogen removal from wastewater by combining anammox with partial denitrification[J].Bioresour Technol,2015,179:497-504.
[5]王耀龙,魏云霞,李晓丽,等.废水脱氮技术研究进展[J].环境工程,2010,28(S1):119-121.
[6]唐婧,屈姗姗,傅金祥,等.复合菌剂强化处理高盐废水脱氮效果[J].环境工程学报,2015,9(6):2700-2703.
[7]张燕,陈英旭,陈光浩.化学反硝化去除硝酸盐的试验研究[J].环境科学,2003,24(4):109-112.
[8]姜瑞,曾红云,王强.氨氮废水处理技术研究进展[J].环境科学与管理,2013,38(6):131-133.
[9]张环,金朝晖,韩璐,等.负载型纳米铁化学反硝化法去除硝酸盐氮的研究[J].中国给水排水,2006,22(15):83-87.
[10]陈寿椿.重要无机化学反应[M].上海:上海科学技术出版社,1982:1597-1602.
[11]魏福祥,傅晓文,马晓珍.镉柱还原光度法测定海水中的硝酸盐氮[J].分析试验室,2011,30(7):10-12.
[12]GB 7480-87水质硝酸盐氮的测定酚二磺酸分光光度法[S].
[13]HJ 535-2009水质氨氮的测定纳氏试剂分光光度法[S].
[14]GB 7493-1987水质亚硝酸盐氮的测定分光光度法[S].
[15]GB 8969-1988空气质量氮氧化物的测定盐酸萘乙二胺比色法[S].
[16]康海彦.纳米铁系金属复合材料去除地下水中硝酸盐污染的研究[D].天津:南开大学,2007:32-33.
[17]李铁龙,孙丽莉,金朝晖,等.纳米铁系双金属复合材料还原水中硝酸盐氮[J].吉林大学学报:工学版,2009,39(2):362-367.
[18]LIOU Y H,LIN C J,HUNG I C,et al.Selective reduction of NO3-to N2with imetallic particles of Zn coupled with palladium,platinum,and copper[J].Chem Eng J,2012,181/182:236-242.
[19]LAURENCE D,OLEG B,DAVID R,et al.Cu-Ni materials prepared by mechanical milling:Their properties and electrocatalytic activity towards nitrate reduction in alkaline medium[J].J Alloys Compd,2007,432:323-332.
[20]RAMAVANDI B,MORTAZAVI S B,MOUSSAVI G,et al.Experimental investigation of the chemical reduction of nitrate ion in aqueous solution by Mg/Cu bimetallic particles[J].Reac Kinet Mech Cat,2011,102:313-329.
[21]汪昆平,刘苗苗,徐乾前,等.钯-铜负载活性炭催化还原去除水中硝酸盐研究[J].水处理技术,2011,37(10):55-56.
[22]付迎春.催化湿式氧化法处理氨氮废水的研究[D].南京:南京工业大学,2004,45-59.
[23]LIOU Y H,LO S L,LIN C J.Chemical reduction of an unbuffered nitrate solution using catalyzed and uncatalyzed nanoscale iron particles[J].Journal of Hazardous Materials,2005,127:102-110.
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