background : textile wastewater is the most important pollutant of the environment. navy blue (nb) ce-rn is an important chemical dye widely used in the textile industry. the present study aimed to investigate the removal of nb textile dyes from aqueous solutions using magnetic iron oxide absorbents. methods: in this study, a sample of synthetic wastewater with nb concentration of 50 mg/l was u...

background: contamination of water with arsenic has attracted the researchers’ attention as a global problem in recent years and has been observed in some parts of iran. the purpose of this study is to assess the efficiency of welding iron waste in removing arsenic from aqueous solutions.   methods: in this study, the effects of different parameters, such as ph (3-9), initial concentration of a...

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background: colors make many problems and these are major sources of environmental pollution. therefore, this wastewater should be treated before discharge to environment to reduce the environmental threats. adsorption is one of the usual processes for color removal from wastewater. nanotube s are new adsorbents with extend application for adsorption of different compounds. aim of this study wa...

the aim of this study was to evaluate the ability of microalgae spirulina platensis and chlorella vulgaris to remove nitrate and phosphate in aqueous solutions. spirulina platensis and chlorella vulgar is microalgae was collected in 1000 ml of municipal water and kno3, k2hpo4 was added as sources of nitrate and phosphate in three different concentrations (0.25, 0.35 and 0.45g/l). during the gro...

cyanide ion, is an environmentally significant pollutant in many industrial wastewaters.therefore, a considerable number of methods have been studied for the wastewater treatment containingcyanide. the goal of our work consists in applying a simple and economic process for solving this problem ofpollution. the removal of cyanide ions by using three anion exchange membranes has been studied unde...

an adsorbent was developed from matured leaves of the aloe barbadensis miller plant for removing pb(ii) from aqueous solutions. adsorption was carried out in a batch process with several different concentrations of pb(ii) by varying amount of adsorbent, ph, agitation time and temperature. the uptake of the metal was initially very fast, but gradually slowed down indicating penetration into the ...

the present study was carried out to investigate the potential of carboxylate group functionalized multi-walled carbon nanotubes (mwcnt−cooh) adsorbent for the removal of methyl orange (mo) textile dye from aqueous solutions. the effects of ph, shaking time and temperature on adsorption capacity were studied; the contact time to obtain equilibrium at 298 ˚k was fixed at 25 min. the effect of te...

nickel is one of the toxin heavy metals in surface waters. developing new approaches aimed at removing heavy metals from aqueous solutions that are simultaneously economical and environmentally friendly is of great importance. the purpose of this study will be using nano-lignocellulose adsorbent as a natural material to remove nickel heavy metal. in this study, several important environmental p...