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Consequence of irrigation with arsenic and zinc contaminated water on accumulation of zinc in radishes plant
Hossein Banejad, Atieh Zarei, Ali Akbar Safari Sinegani, Farshad Dashti,
Volume 7, Issue 2 (10-2014)
Abstract

Background and Objectives: Reuse of treated wastewater in agriculture is becoming more attractive due to the growing demand for water, particularly in arid and semi-arid regions like Iran.In some areas, industrial wastewaters distribute arsenic in the water and vegetables, among the other plants, are mainly irrigated by municipal and industrial wastewater. This study aimed to evaluate the outcome of radish irrigation using water contaminated with arsenic and zinc and to measure the zinc concentration in the edible parts of radish plant. Materials and Methods: The experiments were designed in the form of a factorial completely randomized design with three replications in which radishes were planted in pots about five kilograms. Arsenic concentration at four levels (0, 100,300 and 600 µg/l) and zinc concentration at three levels (0, 10, and 50 mg/l) were added to the irrigation water. The pots were equally irrigated once every 3 to 4 days. After harvesting and laboratory operations, zinc concentration was measured using atomic absorption spectroscopy. Results: The study indicated that zinc concentration in radish tubers is correlated with the concentration of zinc in water. The results of the analysis of variance table for the effect of zinc and arsenic-contaminated irrigation water on zinc concentration in radish roots, tubers and leafs show only one treatment (zinc concentration in water) on the property is significant at 5 and 1%. The results of the comparison table revealed that Zn uptake was decreased with increasing arsenic up to 300 µg/l. Conclusion: It was found that zinc concentration in radish roots, tubers, and leafs is correlated with the concentration of zinc in water. Moreover, there was a competition between the absorption of zinc and arsenic in plants. With increasing arsenic in irrigation water, transition of Zn was reduced to aerial part.


Application of water quality index (WQI) and hydro-geochemistry for surface water quality assessment, Chahnimeh reservoirs in the Sistan and Baluchestan Province
H Hosseini, A Shakeri, M Rezaei, M Dashti Barmaki, M Shahraki,
Volume 11, Issue 4 (3-2019)
Abstract
Background and Objective: Chahnimeh water reservoirs in Sistan and Baluchestan Province are the most important sources for drinking water and irrigation purposes. Many factors such as precipitation, the geography of the watershed, atmosphere, geology and Human activities affect on the chemical, physical, and biological compositions of Chahnimeh water reservoirs. Therefore, the main goal of the present study was to monitor and assess water quality in four Chahnimeh reservoirs during two sampling periods.
Materials and Methods: 84 water samples were taken based on the standard methods (in September 2017 and April 2018) for measurement of the most important physicochemical parameters including major anions, total coliform, BOD, EC, TDS, pH and nitrate. Water quality index (WQI) was used to evaluate the overall water quality status in the Chahnimeh reservoirs.
Results:  The results of hydro-geochemical analysis indicated that the water type changed from sodic bicarbonate and sulfur dioxide to radicle chloride during sampling periods. The Gibbs chart showed that weathering of rocks mainly controlled the chemistry of the main water ions. The results of statistical analyses revealed that there was a high correlation between parameters such as chlorophyll, nitrate, sulfate and chlorine with water quality index. Water quality zoning results based on the WQI index indicated a decrease in the water quality of the wells by 3, 2, 1, and 4, respectively.
Conclusion: In this study, the use of WQI was helpful for fast data interpretation for drinking water purposes in the area. Based on the WQI classification, majority of the samples are falling under good to poor water category.
 

Survey of some heavy metals in forage of coastal rangelands of Bushehr province (Case study: Tangestan city)
Sa Sadeghi, A Kabirifard, Aa Kamali, M Dashtizadeh, Mh Sadeghi, H Khaj,
Volume 12, Issue 4 (2-2020)
Abstract
Background and Objective: Rangeland forage is the main source of feed for sheep and goats in many countries and the concentration of heavy metals in these plants is very important. Bushehr province is also affected by environmental pollution due to its proximity to the Persian Gulf, the occurrence of different wars and the existence of different oil and gas resources. The environment and rangelands, which feed on various livestock, are also exposed to these contaminants. Therefore, knowing the composition of the compounds and health of grassland forages will greatly help experts to better understand the health of meat and milk of animals that graze on these pastures.
Materials and Methods: Based on the rangeland area and the number of livestock in the coastal strip, two rangelands of Bashi and Rostami were selected and their grassland forage was randomly sampled. Plants were sampled at three grazing stages (first, middle and end of grazing season). Samples were dried in shade, then mixed and milled and sent to the laboratory.
Results: The results showed that the average of lead, cobalt, cadmium and chromium were 0.30, 0.15, 0.017 and 3.73 mg/kg dry matter in total rangeland, respectively. Significant differences were observed in the amount of cobalt element in the two study areas and the amount of other elements was not significantly different. The amount of cadmium was significantly different in the various stages of grazing, with the highest concentration in the first stage of grazing.
Conclusion: In general, the concentrations of these elements in the fodder of coastal rangelands of Tangestan area of Bushehr province were at permissible level for grazing animals. No risk of shortage or poisoning for the animals was observed and hence no danger to human health.

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