宋云1,
李培中1,
魏文侠1
1.轻工业环境保护研究所,北京 100095
基金项目: 国家自然科学基金资助项目(41201516)
环保公益性行业科研专项(201409047)
Migration transformation of toluene vapor in silty sand soil vadose zone
GONG Yaju1,,SONG Yun1,
LI Peizhong1,
WEI Wenxia1
1.Environmental Protection Research Institute of Light Industry, Beijing 100095,China
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摘要:挥发性有机物通过包气带向上迁移到地表或室内引发的蒸气入侵(vapor intrusion,VI)问题越发受到关注。以甲苯作为研究对象,采用土柱实验,对粉砂介质包气带中甲苯蒸气发生的扩散、生物降解的规律进行研究。结果表明,粉砂介质中,甲苯蒸气扩散穿透70 cm土柱时间为24 h,甲苯蒸气在土柱内扩散10 d时,土柱达到短暂的稳态平衡；12～30 d时,处于动态平衡；30～60 d时,土柱内甲苯蒸气浓度下降速率发生变化,土柱内O2体积分数下降了8%,CO2体积分数增加了6%；60 d时,甲苯蒸气基本被降解。说明覆盖一定厚度的粉砂对甲苯蒸气的迁移有比较好的阻滞和生物降解作用。
关键词: 蒸气入侵/
甲苯蒸气/
扩散/
生物降解
Abstract:The problem of vapor intrusion(VI)caused by volatile organic compounds (VOCs) which migrate to the surface or indoors through vadose zone has been paid more and more attention. To study the diffusion and biodegradation regularity of toluene vapor in silty sand soil vadose zone, a soil column experiment was carried out. The results showed that toluene vapor could penetrate 70 centimeter soil column in 24 h, while the soil column reached a short steady-state balance at 10 days. It reached a dynamic balance between 12 and 30 days. There would be a shift on the decreasing rate of toluene vapor concentration in the soil column between 30 and 60 days, and the volume fraction of O2 in the soil column decreased by 8%, while the volume fraction of CO2 increased by 6%. After 60 days, toluene vapor degradation had basically been completed. The results showed that silty sand with certain thickness could effectively retard migration of toluene vapor and beneficial for its biodegradation.
Key words:vapor intrusion/
toluene vapor/
diffusion/
biodegradation.
| [1] | 孟昭, 杨云, 高橋茂吉, 等.SKK工法的土壤VOCs污染净化效果研究[J].西安建筑科技大学学报(自然科学版),2012,44(4):541-547 |
| [2] | ABREU L D, ETTINGER R, MCALARY T.Simulated soil vapor intrusion attenuation factors including biodegradation for petroleum hydrocarbons[J].Groundwater Monitoring & Remediation,2009,29(1):105-117 |
| [3] | US EPA.Technical guide for addressing petroleum vapor intrusion at leaking underground storage tank sites[S/OL].[2017-03-07].https://www.epa.gov/ust/technical-guide-addressing-petroleum-vapor-intrusion-leaking-underground-storage-tank-sites |
| [4] | OSTENDORF D W, KAMPBELL D H.Biodegradation of hydrocarbon vapors in the unsaturated zone[J].Water Resources Research,1991,27(4):453-462 |
| [5] | JIN Y, STRECK T, JURY W A.Transport and biodegradation of toluene in unsaturated soil[J].Journal of Contaminant Hydrology,1994,17(2):111-127 |
| [6] | HHENER P, DUWIG C, PASTERIS G, et al.Biodegradation of petroleum hydrocarbon vapors: Laboratory studies on rates and kinetics in unsaturated alluvial sand[J].Journal of Contaminant Hydrology,2003,66(1/2):93-115 |
| [7] | ESCOBAR M E A.Transport and biodegradation of petroleum hydrocarbon vapors in the subsurface.A laboratory soil column study[EB/OL].[2017-03-01].https://repository.asu.edu/items/14807 |
| [8] | PASTERIS G, WERNER D, KAUFMANN K, et al.Vapor phase transport and biodegradation of volatile fuel compounds in the unsaturated zone: A large scale lysimeter experiment[J].Environmental Science & Technology,2002,36(1):30-39 |
| [9] | 章文英, 吴增新.甲苯在土壤中的吸附、迁移及残留的研究[J].同位素,1989,2(4):216-221 |
| [10] | 刘凌, 崔广柏.有机物在土壤水环境中生物降解规律实验研究[J].河海大学学报(自然科学版),2000,28(6):6-10 |
| [11] | 黄国强, 姜斌, 李鑫钢, 等.VOCs在土壤孔隙中扩散模型的适用性[J].天津大学学报,2004,37(11):945-948 |
| [12] | 姜林, 钟茂生, 夏天翔, 等.基于土壤气中实测苯浓度的健康风险评价[J].环境科学研究,2012,25(6):717-723 |
| [13] | 钟茂生, 姜林, 贾晓洋, 等.蒸气入侵暴露情景下土壤气筛选值推导与比较[J].环境科学研究,2013,26(9):979-988 |
| [14] | 钟茂生, 姜林, 姚珏君, 等.生物降解对土壤气中苯衰减系数及筛选值的影响[J].环境科学研究,2014,27(2):178-185 |
| [15] | BEKINS B A, WARREN E, GODSY E M.A comparison of zero-order, first-order, and monod biotransformation models[J].Groundwater,1998,36(2):261-268 |
| [16] | HERS I, ATWATER J, LI L, et al.Evaluation of vadose zone biodegradation of BTX vapours[J].Journal of Contaminant Hydrology,2000,46(3/4):233-264 |
| [17] | 何炜, 陈鸿汉, 刘菲,等.柴油污染土壤修复砂箱试验[J].中国矿业大学学报,2010,39(1):127-133 |
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粉砂介质包气带中甲苯蒸气挥发的迁移转化
龚亚炬1,,宋云1,
李培中1,
魏文侠1
1.轻工业环境保护研究所,北京 100095
基金项目: 国家自然科学基金资助项目(41201516) 环保公益性行业科研专项(201409047)
关键词: 蒸气入侵/
甲苯蒸气/
扩散/
生物降解
摘要:挥发性有机物通过包气带向上迁移到地表或室内引发的蒸气入侵(vapor intrusion,VI)问题越发受到关注。以甲苯作为研究对象,采用土柱实验,对粉砂介质包气带中甲苯蒸气发生的扩散、生物降解的规律进行研究。结果表明,粉砂介质中,甲苯蒸气扩散穿透70 cm土柱时间为24 h,甲苯蒸气在土柱内扩散10 d时,土柱达到短暂的稳态平衡；12～30 d时,处于动态平衡；30～60 d时,土柱内甲苯蒸气浓度下降速率发生变化,土柱内O2体积分数下降了8%,CO2体积分数增加了6%；60 d时,甲苯蒸气基本被降解。说明覆盖一定厚度的粉砂对甲苯蒸气的迁移有比较好的阻滞和生物降解作用。
English Abstract
Migration transformation of toluene vapor in silty sand soil vadose zone
GONG Yaju1,,SONG Yun1,
LI Peizhong1,
WEI Wenxia1
1.Environmental Protection Research Institute of Light Industry, Beijing 100095,China
Keywords: vapor intrusion/
toluene vapor/
diffusion/
biodegradation
Abstract:The problem of vapor intrusion(VI)caused by volatile organic compounds (VOCs) which migrate to the surface or indoors through vadose zone has been paid more and more attention. To study the diffusion and biodegradation regularity of toluene vapor in silty sand soil vadose zone, a soil column experiment was carried out. The results showed that toluene vapor could penetrate 70 centimeter soil column in 24 h, while the soil column reached a short steady-state balance at 10 days. It reached a dynamic balance between 12 and 30 days. There would be a shift on the decreasing rate of toluene vapor concentration in the soil column between 30 and 60 days, and the volume fraction of O2 in the soil column decreased by 8%, while the volume fraction of CO2 increased by 6%. After 60 days, toluene vapor degradation had basically been completed. The results showed that silty sand with certain thickness could effectively retard migration of toluene vapor and beneficial for its biodegradation.
