the present study was focused upon the assessment of acetyl-cholinesterase (ache) activity in the digestive gland (main metabolic center) and foot (highly innervated organ) of the green garden snail, cantareus apertus (born, 1778), exposed to different nominal dietary concentrations of pb (25 and 2500 mg pb/kg), cd (10 and 100 mg cd/kg) and their combination (25 mg pb + 10 mg cd/kg and 2500 mg ...

introduction industrialization and urbanization of societies have caused many environmental problems. therefore, environmental protection has recently become highly important. water resources are particularly of high risk of pollution from industrial waste disposal to river, surface, and ground water, and also from discharge of water to municipal waste water collection systems. these effluents ...

investigations of lake umbozero, the second largest and the deepest lake of the murmansk region, were carried out to detect and define biogeochemical patterns of distribution of the chalcophile elements (hg, cd, pb, as) in water, sediments and organs and tissues of whitefishes. lake umbozero is affected by emissions and effluents from mining and metallurgical enterprises of the murmansk region,...

background and purpose: the heavy metal pollution and its fractionations in the surface sediments of darreh-morad beyg river, hamedan city were monitored for cd, cr, cu, fe, ni, pb, and zn in 2014.   materials and methods: totally 30 surface sediment samples were taken from 10 stations with three replicates. the samples subjected to bulk digestion and chemical partitioning. the concentrations o...

Background & Aims of the Study: Regarding to development of industry, soil contamination has become a serious problem in many countries, such as Iran. The aim of the present work was the illustration of the accumulation of potentially harmful trace elements and the potential risk which is posed to human health in surface soils of three industrial estates of Aran-o-Bidgol city, Isfah...

afforestation of contaminated areas is considered as a possible strategy for reduction of contaminations. in the present study, the effects of lead (pb) and cadmium (cd) were investigated on chlorophyll fluorescence parameters (fv/fm, fo, and fm), photosynthetic pigments (chlorophyll a, b, and total chlorophyll), and proline in one-year-old seedlings of celtis caucasica and robinia pseudoacacia...

background: marine pollution is a global environmental problem that its monitoring by ideal biomonitors is of great importance. marine organisms, especially mussels, have the ability to accumulate metals from the environment they can be considered as a biomonitoring agent. methods: in this study, concentrations of heavy metals were measured in saccostrea cucullata collected from seven sites on ...

The phosphate-embedded calcium alginate beads were successfully synthesized based on sodium alginate, calcium dihydrogen phosphate and sodium hydrogen carbonate. Scanning electron microscopy, Fourier transformed infrared (FTIR) spectroscopy and X-ray diffraction (XRD) were conducted to characterize the morphology and structure of the phosphate-embedded calcium alginate beads. The effects of pH ...