摘要
[目的]监测肉类联合加工厂(简称肉联厂)及其下风向大气污染状况,为卫生防护距离研究提供依据。[方法]按照国家现行标准方法现场监测NH3、H2S及恶臭浓度。分别在缓冲区(厂外)、厂区(厂内)以及猪舍(无组织排放污染源)布设采样点。缓冲区设定在距污染源下风向50、100、200、300、400、500m共6个点,厂区2个点,猪舍区1个点。[结果]对NH3、可吸入颗粒物(PM10)、H2S及恶臭浓度有明显影响的因素包括采样季节(P<0.05)、时段(P<0.05)及监测点与污染源间距离等(P<0.05)。以上因素中,距离因素是NH(3R=0.730,P<0.001)、H2S(R=0.423,P<0.001)及恶臭浓度(R=0.769,P<0.001)的最主要影响因素,而湿度是影响PM10浓度(R=0.466,P<0.001)的最主要因素。恶臭浓度与NH(3R=0.706,P<0.001)以及H2S(R=0.366,P<0.001)浓度分别成对数函数关系。[结论]NH3、H2S、PM10及恶臭浓度受采样季节、时段及监测点与污染源间距离等因素影响,距离因素是其最主要的影响因素。
[ Objective ] To monitor the air pollution of a meat processing plant and its downwind area, for providing basic data for the setting of buffering zone. [ Methods ] The concentrations of NH3, H2S and malodor were monitored by current national standard methods. A total of 9 sampling spots were assigned： 6 were located in the buffer zone outside the plant, 50, 100, 200, 300, 400 and 500 m downwind from the pollution source; 2 in the plant area; and 1 at the pigsty as source of fugitive emission. [ Results ] The factors influencing the concentration of NH3, PM10, H2S and malodor substantially were sampling season （P 〈 0.05）, sampling time （P 〈 0.05） and distance away from the source （P 〈 0.05）. The predominant factor for NH3 （R=0.627, P〈 0.001）, H2S （R=0.417, P〈0.001） and malodor （R=0.701, P〈0.001） was distance away from the source, and that for PM10 （R=0.466, P〈 0.001） was air humidity. A remarkable correlation of exponential function was established either between the concentrations of malodor and NH3 （R=0.706, P〈 0.001） or between the concentrations of malodor and H2S （R= 0.366, P〈 0.001）. [ Conclusion ] The concentration of NH3, H2S, PM10, and malodor are influenced significantly by sampling season, sampling time and distance away from the source, among which the distance is weighted as the most important one.
出处
《环境与职业医学》
CAS
北大核心
2012年第5期285-289,共5页
Journal of Environmental and Occupational Medicine
基金
上海市自然科学基金项目(编号:09ZR1402400)
