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Showing 2 results for Carbon

Rahim Pyghan, , ,
Volume 13, Issue 3 (8-2021)
Abstract

Water physicochemical factors have an important role in the health of fish. In this study, the effect of filtration and density of Macro fish (mean weight: 9.2±1.9 g) on water hardness, sodium and potassium was studied. For this purpose, the concentrations of water biochemical parameters were measured at three densities (1.2, 2.25 and 3 g fish/l) and three filtration methods (carbon filtration, zeolite filtration, and control or simple filtration). Water samples collected in a period of one month and three days intervals and were immediately investigated by kits and water quality instruments. Data were compared using two-way ANOVA. The results showed that the average weight gain in the three types of filtration methods in three densities had no significant differences. The average concentration of sodium in comparison with filtration, between filtration of the zeolite group and control group was significantly different. Also, in hardness of water there were significant differences between filtration of the carbon, zeolite group and the control group. The results showed that the average of potassium level in the three types of filter in three densities had no significant difference. The results showed that there was no marked effect of filtration and density on hardness, minerals and total weight of fishes. Therefor there is no need for special regulation of water minerals in this filtration types.

Soghra Rahimi Moazampour, Seyed Mohammad Bagher Nabavi, Maryam Mohammadi Roozbahani, Mojgan Khodadadi, Sima Sabzalipour,
Volume 13, Issue 4 (12-2021)
Abstract

To determine the level and concentration zoning of total petroleum hydrocarbons (TPHs) and heavy metals (Pb, Co, V, Ni) in surface sediments of the Arvand River, is the purpose of this study. 10 sampling stations were selected for this purpose, along the river route, and sampling was done in winter of 2017. 90 sediment samples were taken by a Van Veen Grab with a cross section of 0.025 square meters. The amount of heavy metals and the concentration of total hydrocarbons were calculated according to the MOOPAM standard, and using atomic absorption (spectrophotometric) or AAS and a measuring Chromatography machine, and zoning was drawn. Based on the analysis, the highest and the lowest amount of hydrocarbons in station 2 (Dairy Farm pond platform) was 21.96 ± 0.50 mg / L and at station 1 (Nahre Khin) was 91.9 ± 0.19 mg / L. In the case of nickel, lead and vanadium, the highest values ​​at station 9 (Yademane Shohada) were 75.96± 0.05 mg / L, at station 6 (Khosrow Abad), 13.07 ± 0.10 mg / L, and at station 7 (The beginning of the menyouhi) was 18.88 ± 0.22 mg / L. According to international standards, the Arvand River banks, in terms of hydrocarbon, were in no-pollution conditions or exposed to little contamination conditions. The amount of cobalt at all stations was less than 0.1%, and in the case of nickel, vanadium and lead, the measured values ​​in the Arvand River sediments were higher than the regional standards of the ROPME Regional Organization (Persian Gulf).


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مجله علمی پژوهشی اکوبیولوژی تالاب Journal of Wetland Ecobiology
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