荆州工业园区典型异味气体污染影响因素分析

Analysis of the Influencing Factors of Typical Odor Gas Pollution in Jingzhou Economic and Technological Development Zone

异味气体是目前工业园区周边居民投诉的重点环境问题之一。该文利用荆州经开区及周边的异味气体监测数据及气象数据,开展了1#~5#5个居民小区典型异味气体污染的影响因素及其变化规律研究。结果显示NH_(3)、H_(2)S、VOCs和臭气浓度具有明显的时间和空间分布特征,其中H_(2)S仅出现在1#点位并呈夏季浓度高冬季低,1#~5#点位的NH_(3)浓度呈现冬季高夏季低,1#、2#和4#点位TVOC浓度则是夏季高而5#则是秋季高的变化特征。Pearson相关性分析结果表明NH_(3)是影响臭气浓度的主要因子,其次是H_(2)S。1#~5#点位典型异味气体浓度的空间差异性既与其周边不同类型企业的排放有明显关系,温度和风向风速也是重要的影响因子,且温度的影响大于风速,在环境温度低或高时均容易出现异味气体的高浓度。因此环境管理部门在监控企业排放的同时,需结合气象条件提前部署典型异味气体污染防治工作。

Odor gas is still one of the key environmental problems complained by the residents around the industrial park at present.In this paper,using the odor gas monitoring data and meteorological data in and around Jingzhou Economic Development Zone,a study was conducted on the influencing factors of typical odor gas pollution and its change pattern in five residential areas from 1#to 5#.The results show that NH_(3),H_(2)S,VOCs and odor concentrations have obvious temporal and spatial distribution characteristics,among which H_(2)S is only found in 1#and is high in summer and low in winter;NH_(3) concentrations in 1#to 5#are high in winter and low in summer,TVOC concentrations in 1#,2#and 4#are high in summer and 5#is high in autumn.The spatial variability of typical odor gas concentrations from 1#to 5#is not only related to the emissions of different types of enterprises in their vicinity,but also the temperature and wind speed are important factors,and the influence of temperature is greater than wind speed,and high concentrations of odor gases are likely to occur when the ambient temperature is low or high.Therefore,while monitoring the emissions of enterprises,the environmental management department needs to combine with the meteorological conditions to deploy typical odor gas pollution prevention in advance.