[Studies on quality of drinking water and causes of liver cancer in a high-incidence area].
Quality of drinking water was comprehensively studied in Fusui County of Guangxi, a high-incidence area for liver cancer. The results indicated pond water was polluted the most severely, well water the least, and river water intermediately. The chemical indicators for water pollution were levels of ammonia, nitrite, humic acid, suspended substances, chemical oxygen demand, and biological oxygen demand. Quality of drinking water was worse in high incidence area for liver cancer than that in low-incidence one. Mortality of liver cancer correlated positively with the levels of nitrite, humic acid, chemical oxygen demand, and so on. These results provided a basis for further studies on the etiology of liver cancer.
Li
D R
DR
Guangxi Cancer Institute, Nanning.
Liu
Z H
ZH
Zhang
Z Q
ZQ
D002681:China; D006801:Humans; D006812:Humic Substances / Q000032:analysis; D008113:Liver Neoplasms / Q000209:etiology*; D009573:Nitrites / Q000032:analysis; D000644:Quaternary Ammonium Compounds / Q000032:analysis*; D014874:Water Pollutants, Chemical / Q000032:analysis*; D014881:Water Supply / Q000032:analysis*
D006812:Humic Substances; D009573:Nitrites; D000644:Quaternary Ammonium Compounds; D014874:Water Pollutants, Chemical