Emission behavior and impact assessment of gaseous volatile compounds in two typical rural domestic waste landfills. (1st January 2023)

• Record Type: Journal Article
• Authors: Li, Pengyu; Ma, Jiawei; Li, Lin; Han, Yunping; Zheng, Tianlong; Wang, Ying; Chai, Fengguang; Liu, Junxin
• Is Part Of: Journal of environmental management. Volume 325:Part B(2023)
• Publication Date: 2023-01-01
• Subjects: Rural domestic waste landfill -- Odors -- Volatile organic compounds -- Identification -- Priority control of pollutants; IURi inhalation unit risk -- OTi threshold of detected odor -- TOAV total OAV of the odorants -- AT Average life time -- Ci concentration of compounds -- ECi inhalation exposure concentrations -- ED Exposure duration -- EF Annual exposure frequency -- ET Daily exposure time -- FTIR Fourier transform infrared -- HI Sum of hazard quotient -- HQi hazard quotient -- HYSPLIT Hybrid Single-Particle Lagrangian Integrated Trajectory -- MIRi maximum incremental reactivity value of VOCs -- OAV odor activity value -- ODT odor detection threshold -- OFP ozone formation potential -- POi contribution of each compound to TOAV -- RAIS Risk Assessment Information System -- RfCi confirmed reference concentration -- Ri cancer risks -- Rt Sum of Ri; Environmental policy -- Periodicals; Environmental management -- Periodicals; Environment -- Periodicals; Ecology -- Periodicals; 363.705
• DOI: 10.1016/j.jenvman.2022.116659
• Languages: English
• ISSNs: 0301-4797

Abstract

Abstract: Landfill sites are sources of gaseous volatile compounds. The dumping area (LDA) and leachate storage pool (LSP) of two typical rural domestic waste landfill sites in north China (NLF) and southwest China (SLF) were investigated. We found that 45, 46, 61 and 68 volatile organic compounds (VOC) were present in the air of NLF-LDA, NLF-LSP, SLF-LDA, and SLF-LSP, respectively. And there were 27, 29, 35 and 37 kinds of odorous compounds being detected. Oxygenated compounds (>48.88%), chlorinated compounds (>6.85%), and aromatics (>5.46%), such as organic acid, 1-chlorobutane, and benzene, were the most abundant compounds in both landfills. The SLF-LDA had the highest olfactory effect, with a corresponding total odor activity value of 29, 635.39. The ozone-formation potential analysis showed that VOCs emitted from SLF landfills had significantly higher potential for ozone formation than those from NLF landfills, with ozone generation potentials of 166.02, 225.86, 2511.82, and 1615.99 mg/m 3 for the NLF-LDA, NLF-LSP, SLF-LDA, and SLF-LSP, respectively. Higher chronic toxicity and cancer risk of VOCs were found in the SLF according to method of Risk Assessment Information System. Based on the sensitivity analysis by the Monte Carlo method, concentrations of benzene, propylene oxide, propylene, trichloroethylene, and N -nitrosodiethylamine, along with exposure duration, daily exposure time, and annual exposure frequency, significantly impacted the risk levels. We provide a scientific basis, which reflects the need for controlling and reducing gaseous pollutants from landfills, particularly rural residential landfills, which may improve rural sanitation. Graphical abstract: Image 1 Highlights: Identification and impact assessment of VOCs generated from two landfill sites. Main VOCs types that escaped from two landfills are oxygenated compounds. Types and relative abundance of VOCs released presented regional variations. Olfactory effects are significant in the northern landfill. Higher chronic toxicity and cancer risk of VOCs were found in southern landfill.