Hasan Izanloo; Gharib Majidi; Afshin Maleki; Mohammad Khazaee; Maryam sadat Tabatabaee Majd; Mahshid Vatankhah; Shahram Nazari
Volume 22, Issue 6 , January and February 2016, , Pages 1035-1042
Abstract
Background: The purpose of this study was to evaluate the concentration of nitrate and nitrite in groundwater resources of Jiroft city and compare them with WHO standard. Materials and Methods: This was descriptive-analytical and cross-sectional study. The samples were taken from 55 wells in different ...
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Background: The purpose of this study was to evaluate the concentration of nitrate and nitrite in groundwater resources of Jiroft city and compare them with WHO standard. Materials and Methods: This was descriptive-analytical and cross-sectional study. The samples were taken from 55 wells in different parts of Jiroft in a one-year-period study. Each season three samples were taken from each source. Nitrate and nitrite concentrations were determined by spectrophotometry. SPSS 16 software were used for data analysis. Statistical tests used, included One-way ANOVA and Post Hoc Tests (Tukey HSD and the Tamhane). Results: The annual average concentration of nitrate and nitrite in the water wells of Jiroft were 10.05 and 0.01 mg/L, respectively. Nitrate and nitrite levels in different seasons showed no significant differences (P>0.05). Nitrate concentrations were significant differences between first zone and zone 2 and 3, second zone and zone 5 and 6, Third zone and zone 5 and 6. Nitrate concentrations in residential areas was more than garden and vacant lands (P<0.05). Conclusion: Nitrate and nitrite concentrations in wells were less than WHO standard but It is likely that some wells will have nitrate concentrations above the standard level, in the future. It is suggested that nitrate increasing factor in wells have to be controled and proper strategy should be considerd for prevention, reduction and control of nitrate concentration.
Omid Bahmani; Seyyedeh Al Mohammad; Afshin Bahmani
Volume 22, Issue 2 , May and June 2015, , Pages 387-396
Abstract
Background: Point and non-point Pollutions (agricultural and urban) are among the major reasons of the decrease of the groundwater quality.The aim of this study was the assessment of nitrate pollution and usage management of irrigation and drinking water in forbidden Hamedan- Bahar plain.
Materials ...
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Background: Point and non-point Pollutions (agricultural and urban) are among the major reasons of the decrease of the groundwater quality.The aim of this study was the assessment of nitrate pollution and usage management of irrigation and drinking water in forbidden Hamedan- Bahar plain.
Materials and Methods: In this study 69 data of Nitrate pollution levels were evaluated with ArcGIS software then the amount of Nitrate pollutionand also the pollution of drinking water were compared with California and EPA standards, respectively, during two periods, before and after the growing season, in 1389.
Results: According to the results, the average of Nitrate during May and September were12.14 and 15.13 mg/litter of nitrogen ions, respectively. The plain area percentage that had the Nitrate concentrations between 5 to 30 mg/litterwere 99.17 and 96.24 during June and September, respectively. Comparing with California standard, the results indicated the moderate contamination of irrigation water. The highest level of DO in September was 17.2 mg/l and in June on the same place was 2.28 mg/l. Also in September the area that located in the range of5 - 10 mg/lhad 4.81 percent of the plain.
Conclusion: The most contaminated section scontainedyekn- Abad village, the suburb of Hamedan and parts of the Central Plains due to excessive use of fertilizer, transfer of sewage and industrial centres. According to California standard the pollution of irrigation water was in the moderate range and according to EPA standard the drinking water was in the hazard range.