Abstract：Objective To explore the main factors influencing turbidity of urban drinking water in Hunan Province, and to analyze the impact of turbidity on disinfection effect. Methods The factors influencing turbidity of drinking water were analyzed by using the data from Hunan Urban Drinking Water Quality Monitoring Network (2014-2017). Correlation and linear regression analyses were performed to assess the relationship between turbidity and oxygen consumption, colony count, residual chlorine and chlorine dioxide and the impact of turbidity on disinfection effect. Results The exceeding standard rate of turbidity of urban drinking water in Hunan Province was significantly lower in 2017 (2.97%) than in 2014 (6.69%), 2015 (7.29%) and 2016 (5.77%) (P<0.001). The exceeding standard rate of turbidity of drinking water with full processing treatment (including coagulation, precipitation, filtration and disinfection) was lower (5.38%). The exceeding standard rate of turbidity of drinking water from underground sources was significantly higher than that from surface sources (16.78% vs. 4.95%, P<0.001), and the exceeding standard rate of turbidity of drinking water from untreated underground sources was the highest (50%). The exceeding standard rate of turbidity of secondary water supply (2.7%) was lower than factory water (7.16%) and terminal water (6.21%) (P<0.001). Positive correlation and linear regression relationship were found between turbidity and colony count and oxygen consumption (R=0.177, R=0.094, P<0.001), but negative correlation and linear regression relationship between turbidity and residual chlorine and chlorine dioxide(R=-0.03, R=-0.196, P<0.001). Conclusions The main factors influencing turbidity in urban drinking water in Hunan Province during 2014-2017 are the types and quality of water sources, water treatment technology and water supply pipe network. Turbidity is closely related to organic pollutants and microbial contamination, and increasing turbidity will affect the disinfection effect of drinking water.
胡冀, 陈彦华, 黄涛, 张杏娥. 2014－2017年湖南省城市饮用水浑浊度影响因素及其对消毒效果的影响[J]. 实用预防医学, 2019, 26(5): 559-562.
HU Ji, CHEN Yan-hua, HUANG Tao, ZHANG Xing-e. Factors affecting turbidity of urban drinking water and its impact on disinfection effect in Hunan Province, 2014-2017. , 2019, 26(5): 559-562.
2019, Vol. 26 
