نتایج جستجو برای: removal of heavy metals from water
تعداد نتایج: 21695424 فیلتر نتایج به سال:
Background & Aims of the Study: One of the most important pollutants in drinking water, air and soils is heavy metals. It is very harmful for humans and other live organisms. The purpose of this study was the usage of a co-composting process for removal of heavy metals from municipal solid waste and sewage sludge. Materials and Methods: This experimental study was a condu...
Contamination of soil with heavy metals has detrimental effects on ecosystems, because heavy metals accumulated in soil may persist and affect terrestrial ecosystems for a long time. Phytoremediation, as sustainable, low-cost and environmental friendly technology based on the direct use of plants for in situ remediation of contaminated soil, sludges, sediments, and ground water through contamin...
Introduction: In many studies, nanoparticles was used to remediation of heavy metals from water, results of these study showed that these materials have high power in contaminant remediation from aqueous solutions, and bio-absorbents also have high power in water infiltration. The main purpose of this paper is investigation of effects of adding of iron oxides nanoparticles to chrome removal bio...
heavy metals and dyes are major contributors in contamination of water streams. these contaminants enter into our eco- system, thus posing a significant threat to public health, ecological equilibrium and environment. thus a combined discharge of these contaminants results in water pollution with high chemical oxygen demand, biological oxygen demand, color, particulate matter, suspended particl...
one of the major environmental problems in the world, especially in iran is deficiency of water resources. this with respect to the entrance of wastewater (especially industrial wastewaters due to their toxic effects) into the water bodies emphasizes the importance of wastewater treatment. heavy metals such as cadmium, lead and vanadium are part of oil and hence are of the major pollutants prod...
groundwater makes up an important part of global freshwater resources, though it is often threatened by overuse of natural resources along with abundant production of wastes in modern society. this study aims to investigate the removal of three heavy metals including nickel, cadmium, and lead from groundwater via electrocoagulation, a suitable method for treatment of water-soluble compounds, de...
Background and purpose: The chemical quality of feed water to dialysis instrument is very important, especially in terms of heavy metals which could cause serious health problems for dialysis patients. This study aimed to determine the concentration of selected heavy metals (lead, cadmium, chromium and zinc) in feed water to dialysis instrument and compared that with EPH and AAMI standards in h...
absorptive characteristics of polyaniline synthesized in different solvents were studied. water and mixture of water with other solvents were implemented for polyaniline synthesis. synthesized polyanilines in powder shape is used as an adsorbent to remove toxic hexavalent chromium from aqueous solutions. experiments were conducted in batch mode. removal mechanism involving polyaniline is the co...
in this research the operation of fixed activated sludge system for treatment of wastewater containing heavy metal compounds, by use of fas pilot ,a plaxy glass tank with three section; these section are downward-flow aerated reactor, upward-flow aerated reactor and gravity sediment unit, length and width and height of each part was respectively 15.7cm, 31.5cm , 51.5 cm and feeding with the syn...
Background and purpose: High concentrations of heavy metals in industrial and domestic wastewater cause adverse effects on the environment and human health. Therefore, removing heavy metals from water resources is considered as a positive step towards sustainable development. Today, application of artificial wetlands to remove pollutants such as heavy metals is increasing due to high costs of c...
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