Copyright
©The Author(s) 2003.
World J Gastroenterol. Jun 15, 2003; 9(6): 1187-1190
Published online Jun 15, 2003. doi: 10.3748/wjg.v9.i6.1187
Published online Jun 15, 2003. doi: 10.3748/wjg.v9.i6.1187
Table 1 Three nitrogenous compounds pollution (mg/L) of the well water in Cixian County and Chichen County from 1993 to 1996
Numbers of well | 1993 | 1994 | 1995 | 1996 | |
Nitrate nitrogen | |||||
Cixian | 33 | 8.770b | 13.381b | 14.473b | 19.554b |
Chichen | 31 | 3.829 | 4.452 | 4.351 | 8.022 |
Ratio | 2.29 | 3.00 | 3.33 | 2.44 | |
(Cixian/Chichen) | |||||
Nitrite nitrogen | |||||
Cixian | 33 | 0.0144b | 0.0629b | 0.0407b | 0.0101b |
Chichen | 31 | 0.0039 | 0.0094 | 0.0085 | 0.0020 |
Ratio | 3.69 | 6.69 | 4.79 | 5.05 | |
(Cixian/Chichen) | |||||
Ammonia nitrogen | |||||
Cixian | 33 | 0.0094 b | 0.0256b | 0.0237 | 0.0117b |
Chichen | 31 | 0.0039 | 0.0029 | 0.0230 | 0.0028 |
Ratio | 2.41 | 8.82 | 1.03 | 4.18 | |
(Cixian/Chichen) |
- Citation: Zhang XL, Zhang B, Zhang X, Chen ZF, Zhang JZ, Liang SY, Men FS, Zheng SL, Li XP, Bai XL. Research and control of well water pollution in high esophageal cancer areas. World J Gastroenterol 2003; 9(6): 1187-1190
- URL: https://www.wjgnet.com/1007-9327/full/v9/i6/1187.htm
- DOI: https://dx.doi.org/10.3748/wjg.v9.i6.1187