INVENTORY AND CHARACTERISTICS OF SMALL-SCALE VOCs IN A DISTRICT OF TIANJIN
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摘要: 在天津市环城某区VOCs污染源活动水平数据基础上,选取相应排放因子,构建该区2017年0.5 km×0.5 km小尺度VOCs排放清单。结果表明:2017年天津市环城某区VOCs排放3563.35 t。小型客车、轻型货车和重型货车为主的道路移动源贡献了32.14%,工业溶剂为主的溶剂使用源贡献了31.05%,钢铁和非金属矿物制品为主的工艺过程源贡献了21.57%。空间分布结果显示,排放源主要分布在主干道路、涂料制造、钢铁和非金属矿物制品密集的区域,排放前3的街镇为葛沽镇、咸水沽镇和北闸口镇,分担率依次为21.47%、19.17%和13.82%。该清单可为区域污染防治策略的制定提供参考,但仍存在一定不确定性因素,道路车流量等活动水平数据需进一步翔实,排放因子本地化研究应进一步开展。Abstract: On the basis of the activity level data of VOCs pollution sources in a district around Tianjin, corresponding emission factors were selected to construct a small scale VOCs emission list of 0.5 km×0.5 km in 2017. The results showed that in 2017, 3563.35 tons of VOCs were emitted in a district around Tianjin. Road mobile sources dominated by small buses, light trucks and heavy trucks contributed 32.14%, solvent sources dominated by industrial solvents contributed 31.05%, and process sources dominated by steel and non-metallic mineral products contributed 21.57%. According to the spatial distribution results, it was mainly distributed in the areas with dense trunk roads, coating manufacturing, iron and non-metallic mineral products. The top three towns were Gegu town, Xianshuigu town and Beizhakou town, with the share rates of 21.47%, 19.17% and 13.82% respectively. There were still some uncertain factors in this list, activity level data such as road traffic flow need to be further detailed, and localization research on emission factors should be further carried out, to provide scientific basis for the formulation of regional pollution prevention and control strategies.
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Key words:
- VOCs /
- emission inventory /
- fine scale /
- spatial distribution /
- uncertainty assessment
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