نتایج جستجو برای: cadmium removal
تعداد نتایج: 163920 فیلتر نتایج به سال:
Free floating aquatic macrophytes, Lemna minor and Spirodela polyrhiza, were exposed to graded concentration of cadmium in a concentration range 1 to10 mg L for a period of one month to evaluate cadmium accumulation in the presence of EDTA. The EDTA was added at the rate of 1, 2 and 3 mg L separately and the experiment was conducted in triplicate. The water and plant samples were collected at f...
Phytoremediation is one of the most widely used methods for removing soil contaminants. In this research, the function of Vetiveria zizianoides to remove cadmium from four different treatments with varying amounts of cadmium chloride contamination (including 0, 20, 40, and 60 mg per liter) was investigated and physiological changes caused by the accumulation of this metal in the plant were moni...
Cadmium is an established human lung carcinogen with weak mutagenicity. However, the mechanisms underlying cadmium-induced carcinogenesis remain obscure. It has been suggested that epigenetic mechanisms may play a role in cadmium-induced carcinogenesis. In this study, we investigated the effects of cadmium on histone methylation and histone demethylases, and the role of histone methylation in t...
Spent Nickel cadmium batteries are classified as hazardous waste due to the presence of toxic cadmium in high concentration. Recycling of metal value by environmentally friendly process is the best option to obtain economical advantage and prevent environmental pollution. In the present investigation, a metal separation scheme is proposed for recovery of cadmium, nickel and cobalt from the leac...
Cadmium is one of the most hazardous metals in environment, even when present at very low concentrations. This study reports systematic development Kenaf fiber biochar as an adsorbent for removal cadmium (Cd) (II) ions from water. The was aided by optimization tool. Activated prepared using physicochemical activation method, consisting pre-impregnation with NaOH and nitrogen (N2) pyrolysis. inf...
Background and Objective: Nickel (II) and cadmium (II) are important in environmental pollutant. Biosorption of heavy metals can be an effective process for the removal and recovery of heavy metal ions from aqueous solutions because of the decrease in sludge problems, economical issues, high efficiency and compatibility with the environment.Materials and Methods: power of wasted activated sludg...
this study reports the removal of cadmium from wastewater in batch mode, using two carbonaceous adsorbents viz. sunflower head carbon (shc) and sunflower stem carbon (ssc) prepared from waste biomass of sunflower. the adsorbents were characterized by fourier transform infrared spectroscopy (ft-ir), scanning electron microscopy (sem) and energy dispersive x-ray analysis (edx). the results of bat...
The cadmium sulfide nanoparticles were synthesized from the nickel-cadmium cake of a hydrometallurgical zinc producing plant and sodium sulfide as Cd2+ and S-2 sources, respectively. Also, the synthesis process was performed by using the secretions of Bacillus licheniformis as bio-surfactant. Initially, in order to obtain a cadmium rich solution, two following steps were carried out: 1) Alkalin...
A significant reduction of kallikrein activity in urine (assayed by its amidolytic activity) was found in 64 normotensive workers who had been exposed to cadmium for 11 years on average and whose cadmium concentrations in urine ranged from 2.2 to 33.1 micrograms/g creatinine. The mean (geometric) urinary kallikrein activity (in U/g creatinine) amounted to 0.52 (range 0.11-1.90) in the control g...
The present investigation has been carried out to assess a chromium, cobalt, and cadmium from wastewaters by natural and modified zeolites were examined by using batch type method. A clinoptilolite type synthetic / natural zeolite were pretreated with HCl and HNO3 to improve the adsorption capacity for heavy metals. The removal efficiencies and kinetics of heavy metals such as chromium, cobalt ...
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