A study of volatile organic sulfur emissions causing urban odors

Emission of volatile organic sulfur compounds from a heavily polluted river in Guangzhou, South China

“…Finally, the concentrations of DMS ranged from 11.8−59.2 mg m −3 in the air at the deltas of the polluted creeks in the city of Izmir (Muezzinoglu 2003). The concentration levels of VOSCs at the water surface in Shijin river were much lower than those in the air at the deltas of the polluted creeks in the city of Izmir, but close to those in air samples at wastewater treatment plant.…”

“…In the city of Izmir, Tukey, DMS and H 2 S as well as 2-propane thiol and 2-butane thiol were the major malodor compounds in the emitted and ambient air in polluted creeks (Muezzinoglu 2003). Wu et al (2006) also found that DMS was one of the major VOSCs downstream of a river connected to a wastewater treatment plant in Taiwan.…”

“…2. Fresh air was used as inlet air, different from a method reported previously (Muezzinoglu 2003), to avoid adsorption and other negative issues. The emission area was 0.13 m 2 with a headspace of 0.12 m. At the time of sampling, the flux chamber was placed on the river water surface, all sets were connected, the pressure valve of the fresh air cylinder and simple valve were opened, and the air pump and air propeller were switched on at the same time.…”

“…The emission area was 0.13 m 2 with a headspace of 0.12 m. At the time of sampling, the flux chamber was placed on the river water surface, all sets were connected, the pressure valve of the fresh air cylinder and simple valve were opened, and the air pump and air propeller were switched on at the same time. Two gas flow meters were all adjusted to 2 L/min till the dynamic equilibrium was achieved (in about half an hour), the flow rate was adjusted to 1 L/min (Muezzinoglu 2003), and the cleaned canisters were opened to collect gas samples Four sampling sites were selected in Shijing River and Liuxi River (Fig. 1) to measure the emissions of VOSCs along the river banks.…”

Emission of oxygenated volatile organic compounds (OVOCs) during the aerobic decomposition of orange wastes

“…These results indicated that OVOCs were mainly released at the early stage of orange waste decomposition, which was consistent with previous studies. Knox (1990) observed that the levels of alcohols were greatest in fresh refuse, and other studies also found that OVOCs (alcohols, carbonyl compounds, esters and ethers) were principally emitted at the early stage of waste decomposition (Smet et al, 1999;Muezzinoglu, 2003;Chiriac et al, 2011;Kumar et al, 2011;Delgado-Rodríguez et al, 2012) and bio-drying (He et al, 2010). Considering that organic waste is an important component of MSWs, and that municipal wastes may stay in dustbins or transfer into stations up to a week before reaching landfills or incinerators, and their decomposition largely takes place under aerobic conditions during the collection and distribution processes and the early times in landfills (Statheropoulos et al, 2005;Zhang et al, 2012), the results in the present study suggested that considerable amounts of OVOCs are emitted during early disposal of organic wastes and thus contribute to malodor from these waste treatment facilities.…”