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©The Author(s) 2000. Published by Baishideng Publishing Group Inc. All rights reserved.
World J Gastroenterol. Sep 15, 2000; 6(Suppl3): 125-125
Published online Sep 15, 2000. doi: 10.3748/wjg.v6.iSuppl3.125
Published online Sep 15, 2000. doi: 10.3748/wjg.v6.iSuppl3.125
Survey on the pollution of drinking water in Cixian area with the highest incidence rate of esophageal cancer
Xiu-Lan Zhang, Suo-Yuan Liang, Xue-Dong Li, Hebei Cancer Institute Shijiazhuang 050011, Hebei Province, China
Shao-Sheng Li, Cui-Yun Qiao, Hai-Guang Li, Cixian Cancer Institute, Handan 056500, Hebei Province, China
Author contributions: All authors contributed equally to the work.
Correspondence to: Dr. Xiu-Lan Zhang, Hebei Cancer Institute Shijiazhuang 050011, Hebei Province, China
Telephone: 311-6033511 Fax: 311-6077634
Received: June 24, 1999
Revised: March 24, 2000
Accepted: May 18, 2000
Published online: September 15, 2000
Revised: March 24, 2000
Accepted: May 18, 2000
Published online: September 15, 2000
Abstract
AIM: To understand the pollution status of drinking water in Cixian area and to find out a way to solute it.
METHODS: Contents of nitrate nitrogen, nitrite nitrogen and ammonia nitrogen were measured and compared with controls and national standards.
RESULTS: Levels of nitrate nitrogen, nitrite nitrogen and ammonia nitrogen were higher than the national permissive levels by 20.60%, 50.50% and 33.30% respectively. Also the levels in Cixian are significantly higher than those of a controls areas of Chicheng - a county with very low incidence rate of esophageal cancer.
CONCLUSION: Three nitrogen levels in drinking water correlate both with the amount of N-containing fertilizer used in these areas and the mortality rates of esophageal cancer.
Keywords: Esophageal neoplasms/etiology; Esophageal neoplasms/prevention and control; Incidence rates; Drinking; Nitrogen; Water pollution