State Key Laboratory of Environmental Aquatic Chemistry, Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, Beijing, 100085, PR China; National Engineering Laboratory for VOCs Pollution Control Material & Technology, University of Chinese Academy of Sciences, Beijing, 101408, PR China.
School of Life Science and Engineering, Southwest Jiaotong University, Chengdu, 611756, PR China.
Chemosphere. 2021 Jun;272:129582. doi: 10.1016/j.chemosphere.2021.129582. Epub 2021 Jan 7.
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/m, while odorous gases and greenhouse gases ranged from 0.4 to 21.2 and 0-100.5 mg/m, 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.
垃圾填埋场被认为是挥发性化合物（VOCs）和气味向大气排放的来源。本研究调查了中国西南农村生活垃圾填埋场的表面 VOCs 和气味排放。共鉴定和量化了 76 种属于 3 种化学家族的化合物。检测到的总挥发性有机物（TVOC）浓度范围为 18.1 至 806.3 mg/m3，而有气味的气体和温室气体浓度范围分别为 0.4 至 21.2 和 0 至 100.5 mg/m3。在渗滤液储存池（LSP）和倾倒区（DPA）周围的空气中发现了高排放。VOCs 的主要物种为己醛、间二甲苯、环氧丙烷、苯乙酮和 2-丁酮。示踪分析表明，扩散到下风边界的气味和 VOCs 主要来自 DPA 和 LSP。根据嗅觉效应分析和癌症风险评估，主要的恶臭气态污染物为硫化氢、丙酸、苯乙烯和 2-戊酮，而苯、三氯乙烯和 1,3-丁二烯是主要的致癌物质。本研究为农村生活垃圾填埋场 VOCs 和气味排放的排放特征、嗅觉效应和癌症风险提供了新的见解。
