Showing 6 results for Lead
Sadegh Samsampour, Msc Asma Golmoradizadeh, Davood Samsampour, Dr Abdoulvahed Rahmani, Dr Ehsan Kamrani, Dr Mir Masoud Sajjadi,
Volume 6, Issue 3 (4-2016)
Abstract
This study was conducted to determine concentration of lead (Pb) in the liver of flathead (Platycephalus indicus) in Minab, Qeshm Island and Khamir Port in the Persian Gulf during winter and summer (n= 30). Concentration of lead was measured using Atomic Absorption Spectrometry (AAS). The results showed that, there were significant differences between stations for the concentration of lead in liver of P. indicus in winter and summer (P<0.05). There were not significant differences between concentration of lead in liver of males and females (P> 0.05). The results showed that, marine pollution (aquaculture, urban and industrial activities) in different area in the Persian Gulf and seasons are effective factors on bioaccumulation of lead in P. indicus.
Mohamad Hosein Gorjian Arabi , Seyed Abbas Hosseini, Hasan Rezaei , Hosein Yousefi , Mehdi Meftah Halaghi ,
Volume 7, Issue 4 (4-2018)
Abstract
In attempts to remove toxic metal lead, distinct types of algae biomass have been scrutinized as alternatives to conventional physicochemical technologies. In this research, the absorption of Lead by nanoalgae Scenedesmus sp. was studied at concentration of10 to 100 mg/L, pH 3 to 8, temperature 15 to 40 °C and exposure time of 10 to 60 minutes)in a batch culture system. The concentration of Lead was determined by Atomic absorption spectrometry. Then, the absorption results were described using the Langmuir and Freundlich isotherms and the pseudo-first-order and Pseudo-second-order synthetics and thermodynamic equation of absorption. Optimal adsorption (a removal of 99.13 percent) was obtained at adsorbent amount of 0.05gr, concentration 40mg/L, pH = 4, temperature 30°C and equilibrium time of 20min. At reviews the correlation coefficient, adsorption kinetics follows the pseudo-second-order model and equilibrium is well described by Freundlich isotherm. According to the adsorption thermodynamics, the reaction found to be spontaneous, endothermic and accidentally. FTIR spectrum revealed that functional groups C-O, -OH and -NH played a major role in the adsorption.
Marziye Raisi, Hamid Reza Pourkhabbaz, Mahdi Banaee, Ali Reza Pourkhabbaz, Saeideh Javanmardi,
Volume 8, Issue 2 (10-2018)
Abstract
Pirimicarb, carbamate, Bio-pesticide and lead are classified as the most common environmental pollutants, which may have different effects on each other and on aquatic organisms. The aim of this study is to evaluate the synergistic and antagonistic effects of Pirimicarb and Bithurin pesticides on lead bio-accumulation in freshwater snail (Lymnaea truncatula). Snails in a completely randomized design were exposed to different sub-lethal concentrations of Pirimicarb (0.0, 0.5 and 1 mg. L-1) and Bithurin (0.0, 0.5 and 1 mg.L-1) alone and together with lead (0.0, 0.1 and 0.2 mg.L-1) for 8 days. By raising the concentration of Pirimicarb ranged from 0.5 to 1 mg.L-1, lead accumulation was increased in the tissue of snails, but with increasing Bithurin concentration from 0.5 to 1 ml.L-1, the accumulation of lead in the tissue of snails did not show a significant increase compared tosnails exposed to lead alone. The results of this study indicate that the synergistic effects of Pirimicarb on the bioaccumulation of lead in the snail tissue depend on the concentration of this pesticide in water, but Bithurin bio-pesticide in the high concentration of lead has a synergistic effect on lead accumulation. These results also indicate that freshwater snails (L. truncatula) can be used as a useful indicator for assessing and monitoring the environment, especially the aquatic ecosystems contaminated with heavy metals and pesticides.
Zahra Konarezadeh, Mohammad Reza Taheri Zadeh, Narges Amrollahi Biuki, Ahmad Noori,
Volume 10, Issue 1 (6-2020)
Abstract
This research was conducted to investigate the lethality concentration of Cadmium and Lead in species
Artemia Franciscana in laboratory conditions. Artemia was fed individually from the micro Algae
Isochrysis galbana and
Nannochloropsis oculata for seven days. Among the heavy metals, Cadmium and Lead, are oil pollution indicators and industrial activities in the marine ecosystem, Therefore, the type of response of these organisms to contaminants such as Lead and Cadmium, due to its increasing contamination, is very important. In this study, Artemia was exposed to 10 concentrations of (120 to 230 mg / L and one control group), Cadmium, and Lead. LC
5024h for Artemia fed with micro Algae
Isochrysisis galbana and Nannochloropsis oculata in the vicinity of Cadmium was 170 mg / L and 189 mg / L, respectively, and for the Lead metal in Artemia fed with both types of microalgae Equal to 180 mg/liter was obtained. The results of this study showed that Cadmium toxicity in Artemia fed with microalgae
I. galbana was higher than that of Lead, but the Lead toxicity of
N .oculata. fed with Artemia was higher than that of Cadmium.
Fakhriyeh Omidi, Hojatollah Jafaryan, Rahman Patimar, Mohammad Harsij, Hamed Paknejad,
Volume 10, Issue 1 (6-2020)
Abstract
The present study was carried out to provide basic information on the physiological damages (biochemical indicators of serum) of Round Goby under laboratory and environmental conditions of lead pollution and finally the design of Biochemical biomarkers of lead pollution in the Gulf of Gorgan in the summer of 2018. In both conditions, the effect of lead contamination on biochemical indicators of serum of Round Goby was investigated. In addition to biochemical indicators of serum, lead levels in the liver, water, and sediments were also measured. According to the results, glucose, cortisol, and ALT parameters showed a positive and significant correlation with lead contamination of Round Goby liver, and total protein and immunoglobin M parameters showed a negative and significant correlation with lead contamination of Round Goby liver under laboratory conditions (P< 0.05), and under environmental conditions, ALT enzyme showed a positive and significant correlation with lead contamination of Round Goby liver, while serum total protein and glucose values showed a negative and significant correlation with lead contamination of Round Goby liver (P< 0.05). Finally, the protein levels due to a significant negative correlation and ALT due to a significant positive correlation with the liver lead levels in both environmental and laboratory conditions can be considered as the most effective and efficient biochemical biomarkers of lead in Round Goby.
Neda Eslami, Abolfazl Bayrami, Ehsan Asadi Sharif, Shima Rahimpouran,
Volume 13, Issue 4 (12-2023)
Abstract
Qualitative assessment by macro-invertebrates is known as a suitable method to determine the health of the river. In this study, the diversity and abundance of Baliqlu River macro-invertebrates were evaluated from June 2019 to May 2021. SamplingsSamples were taken by Surber sampler during four seasons and physico-chemical parameters such as TEM, DO, pH, BOD, and some heavy metals (Cd and Pb) were measured. Diversity indices (Shannon-Wiener), and biotic indices (EPT, HFBI, and BMWP) were calculated in four stations. A total of 8328 macro-invertebrates from the Diptera, Ephemeroptera, and Isopoda were identified. The highest frequency percentage of the dominant groups was related to the Caenidaed, Chironomidae, and Simuliidae. The results of heavy metal accumulation in two classes showed more cadmium and lead accumulation in the Clitellata class (suborder Hirudinea) than the Insecta class (Caenidae family). The results of conventional comparative analysis (CCA) demonstrate that the distribution of most macro-invertebrate families is influenced by the DO parameter. According to the HFBI, the water quality decreased from upstream to downstream in all seasons, and the level of pollution was higher in station 5 compared to other stations, due to human activities, cattle crossing, and sewage output of fish farms.
