城市黑臭水体空气微生物污染及健康风险

Air Microbial Pollution and Health Risk of Urban Black Odorous Water

针对城市黑臭水体周边空气可能存在的微生物污染,在城市黑臭水体离岸一定范围内,对细菌、真菌、总微生物的污染特征及其对不同类型人群健康风险进行了研究.结果表明,城市黑臭水体离岸200 m范围内以细菌和真菌污染为主;静风条件下,离岸20 m范围内存在微生物浓度聚集现象;细菌、真菌、总微生物浓度上午较高,中午次之,下午较低;离岸200 m范围内,黑臭水体断面宽度与细菌、真菌、总微生物浓度有显著相关性;长居人群微生物健康风险主要集中在离岸100m范围内;同等离岸距离,短期暴露健康风险儿童最大,女性次之,男性短期暴露风险最小.

Aiming at the possible air microbial pollution of urban black odorous water the contamination characteristics of bacteria,fungi and total microbe as well as health risks of different types of population within certain distance from the urban black odorous water were studied. The results showed that bacteria and fungi pollution was primary within offshore 200m; under near calm condition,there was an aggregation phenomenon of microorganisms within offshore 20m; the concentrations of bacteria,fungi and total microbe were the highest in the morning,the middle at noon,and the lowest in the afternoon; within offshore 200 m,the width of black odorous water was significantly correlated with the concentrations of bacteria,fungi and total microorganisms; the microbial health risk of residents mainly existed in the offshore 100 m range; at the same offshore distance,the short-term exposure health risk to children was the greatest,followed by women,men to a minimum.