低环多环芳烃异位热脱附行为分析

陈春红; 徐成华; 于天; 刘刚; 张亚平; 洪雅敏

doi:10.13205/j.hjgc.202201012

低环多环芳烃异位热脱附行为分析

doi: 10.13205/j.hjgc.202201012

1. 东南大学能源与环境学院能源热转换及其过程测控教育部重点实验室, 南京 210096;
2. 江苏南京地质工程勘察院, 南京 210041

基金项目:

江苏省环境工程重点实验室科研开放基金(KF2018002)

国家自然科学基金面上项目(42077126)

详细信息

作者简介:
陈春红(1996-),女,硕士研究生,主要研究方向为有机污染土壤处理。1028761395@qq.com

通讯作者:
张亚平(1979-),女,教授,主要研究方向为土壤修复及环境材料。amflora@seu.edu.cn

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出版历程
- 收稿日期: 2021-01-14
- 网络出版日期: 2022-03-30
- 刊出日期: 2022-03-30

EX-SITU THERMAL DESORPTION BEHAVIORS OF LOW-RINGS PAHS

1. Key Laboratory of Thermal Conversion and Control of Ministry of Education, School of Energy and Environment, Southeat University, Nanjing 210096, China;
2. Jiangsu Nanjing Geo-engineering Survey Institute, Nanjing 210041, China

摘要

摘要: 随着我国工业和城镇的快速发展,化石能源的大量使用使得环境中多环芳烃(PAHs)残留量不断增加,给环境和人体健康带来严重危害。以2~4环PAHs为研究对象,探讨了热脱附温度、时间以及PAHs自身结构对热脱附效果的影响,简要分析了热脱附处理对土壤性质的影响,评估了管式炉热脱附的能耗。结果表明:低环PAHs的脱附率随着脱附温度的升高、脱附时间的延长呈升高的趋势;在脱附温度为300℃、脱附30 min条件下,2环PAHs(2R-PAHs)被完全去除,3环PAHs(3R-PAHs)和4环PAHs(4R-PAHs)的去除率分别为93.22%和83.85%。PAHs各组分满足修复目标DB11/T 811—2011《北京市场地土壤环境风险评价筛选值》标准的优选条件,具体如下:萘(Nap)在脱附温度为100℃、脱附10 min时修复达标;菲(Phe)和蒽(Ant)修复达标条件分别为250℃、30 min和150℃、60 min;荧蒽(Fla)和芘(Pyr)土壤残留量基本均高于标准筛选值,需进一步调整热脱附工况参数,或辅助添加改性剂协同修复以降低成本。热脱附后土壤粗颗粒比例减小,与扫描电镜中大颗粒破碎为小颗粒现象相符。该结果可为热脱附技术在PAHs污染土壤修复的应用提供理论参考。
- 异位热脱附 /
- 低环PAHs /
- 污染土壤 /
- 土壤修复
Abstract: With the rapid development of China's industries and urbanization, the massive use of fossil energy has led to an increasing amount of PAHs residues in the environment, which poses serious hazards to the environment and human health. The effects of thermal desorption temperature, time and the structure of PAHs themselves on the thermal desorption were investigated with 2~4 ring PAHs. Additionally, the effect of thermal desorption on soil properties were briefly analyzed, and the energy consumption of thermal desorption in a tube furnace was also evaluated. The results showed that the desorption removal efficiency of low ring PAHs showed an increasing trend with the increase of desorption temperature and desorption time. Under the conditions of 300 ℃ and 30 min of desorption, 2 ring-PAHs was completely removed, and the removal efficiency of 3 ring-PAHs and 4 ring-PAHs was 93.22% and 83.85%, respectively. The preferred conditions for each PAHs component to meet the objective values of the remediation standard(DB11/T 811—2011) were as follows: Nap was remediated at a desorption temperature of 100 ℃ for 10 min; Phe and Ant were remediated at 250 ℃ for 30 min and 150 ℃ for 60 min, respectively; the residues of Fla and Pyr were basically higher than the standard screening values, which required further adjustment of the thermal desorption working parameters or the addition of modifiers for synergistic remediation to reduce the cost. Moreover, the proportion of coarse soil particles decreased after thermal desorption, which was consistent with the fragmentation of large particles into small particles in SEM. The results can provide theoretical references for application of thermal desorption technology in remediation of PAHs contaminated soil.
- ex-situ thermal desorption /
- low-rings PAHs /
- contaminated soil /
- soil remediation

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参考文献(27)

[1]	环境保护部,国土资源部.全国土壤污染状况调查公报[R].2014.
[2]	金赞芳,陈英旭.环境的PAHs污染及其生物修复技术研究进展[J].农业环境保护,2004,20(2):123-125.
[3]	何耀武,区自清,孙铁珩.多环芳烃类化合物在土壤上的吸附[J].应用生态学报,1995,6(4):423-427.
[4]	蔡武.不同氧化剂对炼钢厂土壤中多环芳烃的修复效果研究[D].杭州:浙江大学,2016.
[5]	MUMTAZ M M,GEORGE J D.Toxicological profile for polycyclic aromatic hydrocarbons[J].Polycyclic Compounds,1996.
[6]	WILD S R,JONES K C.Polynuclear aromatic hydrocarbons in the United Kingdom environment:a preliminary source inventory and budget[J].Environmental Pollution,1995,88(1):91-108.
[7]	HONG W J,JIA H,MA W L,et al.Distribution,fate,inhalation exposure and lung cancer risk of atmospheric polycyclic aromatic hydrocarbons in some asian countries[J].Environmental Science & Technology,2016,50(13):7163-7174.
[8]	贺建.表面活性剂-菌群强化泥浆反应器修复菲污染土壤机理研究[D].北京:中国矿业大学,2019.
[9]	ZHAO C,DONG Y,FENG Y P,et al.Thermal desorption for remediation of contaminated soil:a review[J].Chemosphere,2019,221:841-855.
[10]	BUCALA J.Effect of temperature on the release of hexadecane from soil by thermal treatment[J].Journal of Hazardous Materials,2007,143(1):455-461.
[11]	FALCIGLIA P P,GIUSTRA M G,VAGLIASINDI F G A.Low-temperature thermal desorption of diesel polluted soil:influence of temperature and soil texture on contaminant removal kinetics[J].Journal of Hazardous Materials,2011,185(1):392-400.
[12]	孟祥帅,吴萌萌,陈鸿汉,等.某焦化场地非均质包气带中多环芳烃(PAHs)来源及垂向分布特征[J].环境科学,2020.
[13]	魏萌.焦化污染场地土壤中PAHs的赋存特征及热脱附处置研究[D].北京:首都师范大学,2013.
[14]	FALCIGLIA P P,De GUIDI G,CATALFO A,et al.Remediation of soils contaminated with PAHs and nitro-PAHs using microwave irradiation[J].Chemical Engineering Journal,2016,296:162-172.
[15]	CUYPERS C,GROTENHUIS T,JOZIASSE J,et al.Rapid persulfate oxidation predicts PAH bioavailability in soils and sediments[J].Environmental Science & Technology,2000,34(10):2057-2063.
[16]	LING W T,ZENG Y C,GAO Y Z,et al.Availability of polycyclic aromatic hydrocarbons in aging soils[J].Journal of Soils & Sediments,2010,10(5):799-807.
[17]	NAM K,ALEXANDER M.Role of nanoporosity and hydrophobicity in sequestration and bioavailability:tests with model solids[J].Environmental Science Technology,1998,32(1):71-74.
[18]	ROBINSON J P,KINGMAN S W,SNAPE C E,et al.Separation of polyaromatic hydrocarbons from contaminated soils using microwave heating[J].Separation & Purification Technology,2009,69(3):249-254.
[19]	SCHWARZENBACH R P,GSCHWEND P M,IMBODEN D M.Organic acids and bases:acidity constant and partitioning behavior[M]//Environmental Organic Chemistry.John Wiley & Sons,Ltd,2005.
[20]	刘洁.多氯联苯污染土壤改性剂协同热脱附机理及实验研究[D].杭州:浙江大学,2016.
[21]	陈王若尘.添加剂对焦化污染土壤性质及热脱附行为影响研究[D].杭州:浙江大学,2020.
[22]	LIU J,QI Z F,LI X D,et al.Thermal desorption of PCBs from contaminated soil with copper dichloride[J].Environmental Science & Pollution Research,2015,22:19093-19100.
[23]	FUNADA M,NAKAND T,MORIWAKI H,et al.Removal of polycyclic aromatic hydrocarbons from soil using a composite material containing iron and activated carbon in the freeze-dried calcium alginate matrix:novel soil cleanup technique[J].Journal of Hazardous Materials,2018,351:232-239.
[24]	SITE A D.The vapor pressure of environmentally significant organic chemicals:a review of methods and data at ambient temperature[J].Journal of Physical & Chemical Reference Data,1997,26(1):157-193.
[25]	LI F Z,ZHANG Y P,WANG S,et al.Insight into ex-situ thermal desorption of soils contaminated with petroleum via carbon number-based fraction approach[J].Chemical Engineering Journal,2019,385:123946.
[26]	ARARUNA J T,PORTES V L O,SOARES A P L,et al.Oil spills debris clean up by thermal desorption[J].Journal of Hazardous Materials,2004,110(1/2/3):161-171.
[27]	夏天翔,姜林,魏萌,等.焦化厂土壤中PAHs的热脱附行为及其对土壤性质的影响[J].化工学报,2014,65(4):1470-1480.