Trace volatile compounds in the air of domestic waste landfill site: Identification, olfactory effect and cancer risk.
Trace volatile compounds in the air of domestic waste landfill site: Identification, olfactory effect and cancer risk.
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DOI：
10.1016/j.chemosphere.2021.129582
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发表时间：
2021-01
期刊：
影响因子：
8.8
通讯作者：
Ying Wang;Lin Li;Zhongping Qiu;Kaixiong Yang;Yunping Han;Fengguang Chai;Pengyu Li;Yanjie Wang
中科院分区：
文献类型：
--
作者：
Ying Wang;Lin Li;Zhongping Qiu;Kaixiong Yang;Yunping Han;Fengguang Chai;Pengyu Li;Yanjie Wang
垃圾填埋场被认为是挥发性化合物（VOC）和气味排放到大气中的来源。对西南某农村生活垃圾填埋场VOCs和恶臭气体的表面排放进行了研究。共鉴定和定量了属于3个化学家族的76种化合物。检测到的挥发性有机化合物（TVOC）总量范围为18.1至806.3毫克/立方米，而恶臭气体和温室气体的范围分别为0.4至21.2和0-100.5毫克/立方米。在渗滤液储存池和倾倒区周围的空气中发现了高排放量。挥发性有机物的主要种类为己醛、间二甲苯、环氧丙烷、苯乙酮和2-丁酮。溯源性分析表明，扩散到下风向边界的气味和VOCs主要来自DPA和LSP。根据嗅觉效应分析和致癌风险评估，主要致臭气体污染物为硫化氢、丙酸、苯乙烯和2-戊酮，苯、三氯乙烯和1，3-丁二烯为主要致癌物。该研究为了解农村生活垃圾填埋场挥发性有机物和恶臭气体的排放特征、嗅觉效应和致癌风险提供了新的视角。
Landfill sites are regarded as sources of volatile compounds (VOCs) and odors emitted to the atmosphere. Surface emissions of VOCs and odors were investigated in a rural domestic waste landfill site located in southwest China. A total of 76 chemical compounds belonging to 3 chemical families were identified and quantified. The total number of VOCs (TVOC) detected ranged from 18.1 to 806.3 mg/m3, while odorous gases and greenhouse gases ranged from 0.4 to 21.2 and 0–100.5 mg/m3, respectively. High emissions were found in the air surrounding the leachate storage pool (LSP) and dumping area (DPA). The dominant species of VOCs were hexaldehyde, m-xylene, propylene oxide, acetophenone, and 2-butanone. The traceability analysis showed that the odors and VOCs diffused to the downwind boundary mainly came from the DPA and LSP. According to the olfactory effect analysis and cancer risk assessment, the main odor-causing gaseous pollutants were hydrogen sulfide, propionic acid, styrene, and 2-pentanone, while benzene, trichlorethylene, and 1,3-butadiene were the dominant carcinogens. This study provides new insights into the emission characteristics, olfactory effects, and cancer risks of VOCs and odors emitted from rural domestic solid waste landfill sites.