高温煅烧对污泥焚烧飞灰重金属浸出特性影响研究
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摘要
污泥焚烧飞灰经气流分级机分级后进行高温煅烧处理,采用硫酸硝酸法、TCLP、欧盟EN12457—3该3种不同浸出方法研究高温煅烧对不同粒径焚烧飞灰重金属浸出特性的影响,即从不同粒径飞灰的生长机制分析污泥焚烧飞灰物化特性,研究煅烧温度对飞灰煅烧灰渣重金属含量影响,比较不同浸出方法对飞灰煅烧灰渣重金属的浸出特性,探究煅烧对飞灰煅烧灰渣浸出特性的影响。结果表明:重金属Cr、Cu、Pb、Zn在高温煅烧残渣中均有一定程度的富集;3种浸出方法的浸出能力从高到低的次序为TCLP、EN12457—3、硫酸硝酸法。环境酸性越强,重金属浸出越多,则对环境危害越大;高温煅烧有利于重金属Cu和Zn的固定,其浸出特性在高温煅烧后均有所降低;高温煅烧残渣中重金属Cr的浸出率高于原样飞灰,在欧盟EN1245.7—3、TCLP的浸出方法中,浸出率比原样飞灰高达10倍左右。
The sludge incineration fly ash was calcined after classification by gas flow classifier,the effects of high-temperature calcination on heavy metal leaching characteristics of incineration fly ash with different particle sizes were studied by three different leaching methods:sulfuric acid & nitric acid method,TCLP and EU EN12457-3,from growth mechanism of different size of fly ash,the physical and chemical properties of sludge incineration fly ash were analyzed,how the calcination temperature affected the heavy metal content of calcined ash was researched,the influences of different leaching methods on the leaching characteristics of heavy metal for calcined ash of fly ash were compared,how the calcination affected the leaching characteristics of fly ash calcined ash was discussed.The results show that the results showed that the heavy metals Cr,Cu,Pb and Zn all have a certain degree of enrichment in the high temperature calcination residues;the leaching ability of the three leaching methods in order are:TCLP>EN12457-3>sulfuric acid nitric acid method.Stronger the environmental acidity and the more the heavy metal leaching,the greater the damage is;the high temperature calcination is beneficial to the fixation of heavy metals Cu and Zn,and the leaching characteristics is reduced after calcination at high temperature;the leaching rate of heavy metal Cr in high temperature calcination residue is higher than that of the original fly ash,in the EU EN12457-3 and TCLP methods,the leaching rate is about10 times higher than that of the original fly ash.
The sludge incineration fly ash was calcined after classification by gas flow classifier,the effects of high-temperature calcination on heavy metal leaching characteristics of incineration fly ash with different particle sizes were studied by three different leaching methods:sulfuric acid & nitric acid method,TCLP and EU EN12457-3,from growth mechanism of different size of fly ash,the physical and chemical properties of sludge incineration fly ash were analyzed,how the calcination temperature affected the heavy metal content of calcined ash was researched,the influences of different leaching methods on the leaching characteristics of heavy metal for calcined ash of fly ash were compared,how the calcination affected the leaching characteristics of fly ash calcined ash was discussed.The results show that the results showed that the heavy metals Cr,Cu,Pb and Zn all have a certain degree of enrichment in the high temperature calcination residues;the leaching ability of the three leaching methods in order are:TCLP>EN12457-3>sulfuric acid nitric acid method.Stronger the environmental acidity and the more the heavy metal leaching,the greater the damage is;the high temperature calcination is beneficial to the fixation of heavy metals Cu and Zn,and the leaching characteristics is reduced after calcination at high temperature;the leaching rate of heavy metal Cr in high temperature calcination residue is higher than that of the original fly ash,in the EU EN12457-3 and TCLP methods,the leaching rate is about10 times higher than that of the original fly ash.
引文
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[2]刘淑静.污泥燃烧与污染排放特性研究[D].大连:大连理工大学,2007:1-69.
[3]Eseudey M,F?Rster J F,Becerra J P,ct al.Disposal of domestic sludge and sludge ash on volcanic soils[J].Journal of Hazardous Materials,2006,139(3):550-555.
[4]Liu J Y,Huang L,Sun S,et al.Thermodynamic Equilibrium Calculations on Cd Transformation during Sewage Sludge Incineration[J].Water Environment Research,2016,88(6):548-556.
[5]Kasina M,Kowalski P R,Michalik M.Metals accumulation during thermal processing of sewage sludge characterization of fly ash and air pollution control(APC)residues[J].Resources&Environment,2016,97:23-30.
[6]Na W.Lcachability of Heavy Metals from Lightweight Aggregates Made with Sewage Sludge and Municipal Solid Waste Incineration Fly Ash[J].International Journal of Environmental Research and Public Health,2015,12(5):4992-5005.
[7]Zhang H,Sun L,Sun T.Leaching of Heavy Metals from Artificial Soils Composed of Sewage Sludge and Fly Ash[J].Bulletin of Environmental Contamination and Toxicology,2012,88(3):406-412.
[8]Gruzdkov D Y,Shirkin L A,Trifonova T A.Assessment of the migration of heavy metals in soils[J].Moscow University Soil Science Bulletin,2009,64(4):182-188.
[9]Chrysochoou M,Dermatas D.Pollution of soil and groundwater by heavy metals[J].Journal of Hazardous Materials,2015,281.
[10]刘敬勇,孙水裕.焚烧飞灰高温过程中重金属的挥发及其氯转化特征[J].环境科学,2012,33(9):3279-3287.
[11]Zhang H,Jiang L,Zhou X,et al.Determination of hcxachlorobutadicnc,pentachlorobcnzcne,and hexachlorobenzene in waste incineration fly ash using ultrasonic extraction followed by column cleanup and GC-MS analysis.[J].Analytical and bioanalytical chemistry,2018,410(7):1893-1902.
[12]Tashakor M,Yaacob W Z W,Mohamad H,et al.Assessment of selected sequential extraction and the toxicity characteristic leaching test as indices of metal mobility in serpentinite soils[J].Chemical Spcciation&Bioavailability,2014,26(3):139-147.
[13]Tsiridis V,Samaras P,Kungolos A,et al.Application of leaching tests for toxicity evaluation of coal fly ash[J].Environmental Toxicology,2006,21(4):409-416.
[14]Back J W,Choi A S,Park H S.Solidification/stabilization of ASR fly ash using Thiomer material:Optimization of compressive strength and heavy metals leaching.[J].Waste management(New York,N.Y.),2017,70:139-148.
[15]谷庆宝,马福俊,张倩,等.污染场地固化/稳定化修复的评价方法与标准[J].环境科学研究,2017,30(5):755-764.
[16]Huber F,Blascnbaucr D,Mallow O,et al.Thermal co-treatment of combustible hazardous waste and waste incineration fly ash in a rotary kiln[J].Waste Management,2016,58:181-190.
[17]Fukui K,Arimitsu N,Kidoguchi S,et al.Synthesis of calcium phosphate hydrogel from waste incineration fly ash and bone powder[J].Journal of Hazardous Materials,2008,163(1):391-395.
[18]Zhipeng T,Bingru Z,Chengjun H,et al.Effect of mineral reaction between calcium and aluminosilicate on heavy metal behavior during sludge incineration[J].Fuel,2018,229:241-247.
[19]王春峰,陈冠飞,朱艳臣,等.不同粒径垃圾焚烧飞灰重金属毒性浸出及生物可给性[J].环境科学,2016,37(12):4891-4898.
[20]刘锋,王琪,黄启飞,等.固体废物浸出毒性浸出方法标准研究[J].环境科学研究,2008,21(6):9-15.
[21]TIAN Z P,ZHANG B R,HE C J,et al.The physiochemical properties and heavy metal pollution of fly ash from municipal solid waste incineration[J].Process Safety and Environmental Protection,2015,98:333-341.
[22]段华波,黄启飞,王琪,等.危险废物浸出毒性的理论基础研究[J].环境科学研究,2005(S1):27-30.
[23]王丰,李润东,李彦龙,等.污泥飞灰中重金属不同浸出方法比较及综合毒性评价[J].环境科学,2018,39(1):292-299.
[24]国家环境保护总局.固体废物浸出毒性浸出方法硫酸硝酸法:HJ/T 299—2007[S].北京:中国标准出版社,2007:05.
[25]崔若琦.污泥焚烧烟气中细颗粒物与重金属交互作用机理[D].沈阳:沈阳航空航天大学,2017:1-51.
[26]徐国津,李申杰,胡财平,等.电感耦合等离子体原子发射光谱法测定垃圾焚烧飞灰中重金属的浸出率[J].环境科技,2016,29(4):70-73.
[27]戴兴征,李永祥,曾鹏,等.煅烧条件对锌氧粉中锑浸出特性的影响[J].昆明理工大学学报(自然科学版),2014,39(1):1-4.
[28]赵国华,罗兴章,陈贵,等.固体废物中重金属浸出毒性评价方法的研究进展[J].环境污染与防治,2013,35(7):80-81.
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