Impact of water supply from Qiandao Lake on gross radioactivity level in drinking water in downtown Hangzhou
10.3760/cma.j.cn112271-20220127-00037
- VernacularTitle:千岛湖供水对杭州市主城区饮用水中总放射性水平的影响
- Author:
Hong REN
1
;
Yiyao CAO
;
Peng WANG
;
Hua ZOU
;
Shunfei YU
;
Bing ZHU
;
Dongxia ZHANG
;
Zhiqiang XUAN
;
Yaoxian ZHAO
Author Information
1. 浙江省疾病预防控制中心，杭州 310051
- Keywords:
Drinking water;
Gross α;
Gross β;
Radioactivity levels
- From:
Chinese Journal of Radiological Medicine and Protection
2022;42(6):438-442
- CountryChina
- Language:Chinese
-
Abstract:
Objective:To investigate the levels of gross radioactivity in drinking water in Hangzhou city before and after Qiandao Lake as the water source to the main urban area of Hangzhou.Methods:Since 2012, water samples were collected from water source, factory water and peripheral water in rainy and dry seasons, respectively, to determine their gross α and β activity concentrations for comparison and analysis.Results:The gross radioactivity levels in drinking water in Hangzhou are lower than the limits specified in the national standard "Standards for drinking water quality" (GB 5749-2006), without statistically significant difference for these water sources between the rainy and dry season ( P>0.05). The gross α(0.008±0.000)and gross β(0.034±0.013)levels in Qiandao lake were both less than those in Qiantang river ( Z=-3.235, -4.058, P<0.05), with significant difference ( Z=-2.181, -4.577, P<0.05). There was no significant difference in gross α and gross β in factory water and peripheral water before and after the operation of Qiandao Lake water supply project ( P>0.05). Conclusions:The gross radioactivity in drinking water in downtown Hangzhou are low from 2012 to 2020. The gross radioactivity levels in Qiandao Lake are lower than in the lower reaches of Qiantang river and Dongtiao steam. No impact was generated on radioactivity levels in drinking water after Qiandao lake supplied water to Hangzhou.
