نتایج جستجو برای: chromium removal efficiency
تعداد نتایج: 539305 فیلتر نتایج به سال:
Purpose: This study aimed to analyze the effects of removal of hexavalent Chromium using carbonated almond green hulls. In the present study, derived carbon fromalmond green hulls of zonal district of Iran were used to remove hexavalent Chromium from Synthetic wastewater. Materials and Methods: The effects of pH (2-10), Adsorbent dose (2-24 g/L), Cr (VI) concentration (10-100 mg/L), Contact tim...
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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...
COMPARITATIVE STUDY OF ADSORPTION OF Cr(VI) FROM WASTE WATER USING TAPIOCA PEEL AND BANYAN TREE ROOT
One of the most important and toxic heavy metals in wastewater is chromium. Cr (VI) is released from different industrial operations, including metallurgy, leather tanning, paint, textile industries, chemical manufacturing, pulp production, ore and petroleum refining, metal corrosion, electroplating products etc. Hexavalent chromium is toxic, carcinogenic, probably mutagenic and highly soluble....
Introduction: Nowadays, owing to industrial activities heavy metals alongside chemical and physical pollutants are discharged to the environment resulting in extensive pollution of water bodies. Thus, simultaneous reduction of hexa-valent chromium and nitrate using granular zero-valent magnesium was studied. Methods: The current experimental study was conducted in 250 ml erlens on a shaker a...
The interaction between the ions and the charge of membranes can affect the efficiency of pollutant removal. The present study investigated the removal efficiency of hexavalent chromium and nitrate ions from both actual and synthetic contaminated water via two different commercial spiral wound polyamide nanofilters. In addition, the interaction of ions under different experimental conditions wa...
Background and purpose: Presence of heavy metals in water resources is of great concerns due to adverse effects on human health. The aims of this study were to evaluate the efficiency of coagulation process using Polyaluminum Silicate Chloride (PASiC) in removal of hexavalent chromium and Cadmium from aqueous solutions and comparing that to the standards. Materials and methods: Experiments w...
The present study investigates an NF process for removal of copper and hexavalent chromium, studying the effect of pH (5, 7, 9) as well as contaminants' concentration (50, 500, 5000 µg/L) at a constant pressure of 8 bar; with the recovery rate, regulated at 75±2%. To determine the main factors, affecting the system performance, and evaluate the interaction effects among the factors, the experim...
Several low cost biomaterials such as rice husk, sugar cane bagasse, Tulsi Leaf &branches, coconut shell & coir and fly ash were tested for removal of chromium. All the experiments were carried out in batch process. The adsorbent, which had highest chromium (VI) removal, was coconut shell. An influence of chromium concentration, contact time on removal of chromium from effluent was investigated...
The present study investigates an NF process for removal of copper and hexavalent chromium, studying the effect of pH (5, 7, 9) as well as contaminants' concentration (50, 500, 5000 µg/L) at a constant pressure of 8 bar; with the recovery rate, regulated at 75±2%. To determine the main factors, affecting the system performance, and evaluate the interaction effects among the factors, the experim...
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