摘要
近年来,原水嗅味物质含量较高,且严重影响了饮用水的口感和用户的身体健康。因此,对上海H水厂2021年度进厂原水中的嗅味物质二甲基异莰醇(2-methylisoborneol, 2-MIB)、土臭素(geosmin, GSM)利用气相色谱-质谱法进行检测。H水厂进厂原水的主要致嗅物质为2-MIB、GSM,其浓度均基本低于检出限。对2-MIB年变化规律进行探索,发现夏秋季浓度高于春冬季节,且9月达到全年最高值(19.04 ng/L)。GSM浓度基本全年低于检出限,无明显的年变化规律。之后,对2-MIB、GSM浓度变化的影响因素进行研究,发现藻类及水温与2-MIB浓度之间呈显著正相关性,是影响浓度变化的主要因素。其中,硅藻、蓝绿藻是造成变化的主要藻类,而浑浊度、耗氧量、氨氮与2-MIB浓度之间无显著相关性,不是其变化的影响因素。GSM浓度与藻类、水温、浑浊度、耗氧量、氨氮之间均无显著相关性。
In recent years, the raw water has high content of odor substances, which have seriously affected the taste of drinking water and the health of users. Therefore, the odor substances 2-methylisoborneol(2-MIB) and geosmin(GSM) in the raw water of Shanghai WTP H in 2021 were detected by gas chromatography-mass spectrometry(GC-MS) analysis method. The main odor-causing substance in the raw water of WTP H was 2-MIB and GSM, the concentrations were basically lower than the detection limit. Through exploring the annual variation law of 2-MIB, it was found that the concentration in summer and autumn was higher than that in spring and winter, and reached the annual maximum value of 19.04 ng/L in September. The GSM concentration was basically lower than the detection limit throughout the year, so there was no obvious annual change law. After that, the influencing factors of concentration change of 2-MIB and GSM were studied. It was found that algae and water temperature were significantly positively correlated with 2-MIB concentration, which were the main factors affecting the change of 2-MIB concentration. Among them, Diatoms and Cyanobacteria were the main algae causing the change. Turbidity, oxygen consumption and ammonia nitrogen had no significant correlation with 2-MIB concentration, and were not the influencing factors. There was no significant correlation between GSM concentration and algae, water temperature, turbidity, oxygen consumption, ammonia nitrogen.
作者
陈晓萌
CHEN Xiaomeng(Shanghai Nanhui Water Supply Co.,Ltd.,Shanghai 201399,China)
出处
《净水技术》
CAS
2022年第S02期1-7,41,共8页
Water Purification Technology
关键词
二甲基异莰醇
土臭素
气相色谱-质谱法
原水
年变化
藻类
2-methylisoborneol(2-MIB)
geosmin(GSM)
gas chromatography-mass spectrometry(GC-MS)
raw water
annual variation
algae
