Removal of phenol from aqueous phase by using neutralized red mud

Tor, Ali; Çengeloğlu, Yunus; Aydın, Mehmet Emin; Ersöz, Mustafa

doi:10.1016/j.jcis.2006.04.054

Cited by 162 publications

(67 citation statements)

References 33 publications

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“…Similar effect has been reported earlier when HFO was taken as an adsorbent [33]. Cl − had less impact on fluoride adsorption, as Cl − forms an outer-sphere surface complexes, while SO 4 2− forms A c c e p t e d M a n u s c r i p t 13 both outer-sphere and inner-sphere surface complexes [34]. Therefore, the expected impact of Cl − on fluoride adsorption is less significant than that of SO 4 2− .…”

Section: Effects Of Coexisting Anionssupporting

confidence: 84%

Fluoride adsorption studies on mixed-phase nano iron oxides prepared by surfactant mediation-precipitation technique

Mohapatra

Rout

Singh

et al. 2011

Journal of Hazardous Materials

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This is a PDF file of an unedited manuscript that has been accepted for publication. As a service to our customers we are providing this early version of the manuscript. The manuscript will undergo copyediting, typesetting, and review of the resulting proof before it is published in its final form. Please note that during the production process errors may be discovered which could affect the content, and all legal disclaimers that apply to the journal pertain. Experimental procedure MaterialsFe(NO 3 ) 3 .7H 2 O and cetyltrimethyl ammonium bromide (CTAB) used for synthesis were of Analytical Grade (E Merck, India). Sodium fluoride (Ranchem, India) was used for the preparation of the standard fluoride (1000 mg/L) stock solution. Sodium 2-(para sulfophenyl azo)-1,8-dihydroxy-3,6-naphthalene disulfonate (SPADNS) and zirconyl oxychloride used for fluoride analysis were of GR (E. Merck) grade. Preparation of mixed iron oxide/hydroxide sample by surfactant mediationprecipitation techniquePage 5 of 38A c c e p t e d M a n u s c r i p t 5 100 mL of a 0.88 M Fe(NO 3 ) 3 was taken in a clean, dry beaker. To this 5 mL of 10 % cetyltrimethyl ammonium bromide (CTAB) solution was added and the solution was stirred for 2 h. The pH of the solution was adjusted to 10.0 by addition of 1 M NaOH solution under stirring. The contents were further stirred for 24 h after pH adjustment. The precipitate formed was filtered through a G4 frit crucible and was thoroughly washed with water until the filtrate was free of nitrate. The precipitate was then transferred to a beaker and the volume made up to 500 mL with water. The beaker was kept at 60 0 C for 12 h in an oven. After aging, the solution was finally filtered through a G4 crucible, washed thoroughly with water and dried in an oven at 100 0 C for 24 h. Batch fluoride sorption experiments on the prepared sample and fluoride analysisA 100 mg/L fluoride stock solution was prepared by dissolving 0.221g of NaF in 1L of double distilled water. The experimental solutions were prepared by appropriate dilutions of the above solution. 0.1 g of the sample was taken in a 100 mL polyethylene plastic vial and 50 mL of fluoride solution of known concentration was added. The contents were kept for constant shaking in a temperature controlled water bath shaker

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Section: Effects Of Coexisting Anionssupporting

confidence: 84%

Fluoride adsorption studies on mixed-phase nano iron oxides prepared by surfactant mediation-precipitation technique

Mohapatra

Rout

Singh

et al. 2011

Journal of Hazardous Materials

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“…The Langmuir model assumes uniform energies of sorption on the surface and no transmigration of sorbate in the plane of the surface [Kara et al, 2008]. The most important model of monolayer adsorption came from the work of Langmuir [Tor et al, 2006;Langmuir, 1916]. The linear form of the Langmuir adsorption isotherm is often expressed as:…”

Section: Adsorption Isothermsmentioning

confidence: 99%

Role of Different Bleaching Earths for Sunflower Oil in a Pilot Plant Bleaching System

Topkafa¹,

Ayyıldız²,

Arslan³

et al. 2013

Pol. J. Food Nutr. Sci.

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The purpose of present study is to investigate the effi ciency of different kinds of Turkish commercial bleaching earth materials for changes in different colour pigment concentrations in neutralized sunfl ower oils. The bleaching experiments were performed in a pilot system under at stable vacuum (50 mmHg) and temperature (100ºC) for 30 min. By examining the changes in chlorophyll, β-carotene and red colour, bleaching process parameters such as type and dosage of the bleaching material were optimised. The sorption characteristics of colour pigments were evaluated using common adsorption isotherms and Scatchard plot analysis. Ads-3 acid-activated earth material at 1% (w/w) per samples was found to be the most appropriate sorbent and the amount of sorbed pigments was calculated as 1.01x10 -4 mmol/g ads. for chlorophyll, 1.15x10 -3 mmol/g ads. for carotene and 1.70 red on Lovibond colour scale. The procedure indicated that this system can be easily adapted to the actual oil refi ning systems. Unauthenticated Download Date | 5/11/18 5:46 AM

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“…The symptoms of acute phenol poisoning include xerostomia, darkening of the color of urine, and the destruction of organs and muscles. Long-term exposure to phenol vapors can cause anorexia, weakness, headache, muscle pain, and jaundice (6,7). Due to the high absorption of phenol through the skin of the hand or forehead (60%-90%), in high concentrations, it can lead to death (8,9).…”

Section: Introductionmentioning

confidence: 99%

Evaluation of removal efficiency of phenol from synthetic aqueous solutions by Citrullus colocynthis seed ash

Salari

Afsharnia

Moteallemi

et al. 2018

Environ Health Eng Manag

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Background: Phenol is a prevalent pollutant found in many industrial wastewaters, and it is paid singular attention because of its special features like high toxicity, carcinogenic properties, and vital gathering ability that affects the health of humans and the environment. One of the most important technologies for the removal of phenol is the use of adsorbents. The current study investigated the removal of phenol from synthetic aqueous solutions using Citrullus colocynthis seed ash. Methods: This study is experimental and was conducted on a pilot scale. The efficiency of phenol removal by C. colocynthis seed ash was evaluated in a batch system, and different parameters such as initial concentration of phenol (10, 20, 50, and 80 mg/L), contact time (2, 5, 10, and 30 minutes), pH (2-12), adsorbent dose (0.5, 1, 3, 5, and 10 g/L), and temperature were studied. Excel software was used for data analysis. The adsorption process was modeled with Freundlich and Langmuir isotherms at controlled temperatures. Results:The results showed that the highest removal rate of phenol was obtained at a pH of 2 (83.4%), initial phenol concentration of 20 ppm (66.4%), adsorbent dose of 5 g/L (86.8%), and contact time of 10 minutes. The evaluation of correlation coefficients showed that the phenol adsorbed by C. colocynthis seed ash was in greater accordance with the Freundlich model than the Langmuir model. Conclusion:In general, the results of this study revealed that C. colocynthis seed ash has suitable potential for use in removing phenol from aqueous solutions on operation and practical scales due to its low cost and easy access. Keywords: Phenol, Adsorption, Citrullus colocynthis Citation: Salari S, Afsharnia M, Moteallemi A, Ghasemi M. Evaluation of removal efficiency of phenol from synthetic aqueous solutions by Citrullus colocynthis seed ash.

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Removal of phenol from aqueous phase by using neutralized red mud

Cited by 162 publications

References 33 publications

Fluoride adsorption studies on mixed-phase nano iron oxides prepared by surfactant mediation-precipitation technique

Fluoride adsorption studies on mixed-phase nano iron oxides prepared by surfactant mediation-precipitation technique

Role of Different Bleaching Earths for Sunflower Oil in a Pilot Plant Bleaching System

Evaluation of removal efficiency of phenol from synthetic aqueous solutions by Citrullus colocynthis seed ash

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