adsorption of hexavalent chromium by activated carbon

Treatment of Hexavalent Chromium Contaminated Wastewater

Chromium (Cr(VI)) causes serious impacts on the environment and human In this study the commercial activated carbon-loaded silver nanoparticle (AgNPs-AC) was used as a new adsorbent to remove Cr(VI) from the aqueous solution Batch adsorption experiments were conducted to evaluate the effects of pH the initial concentration of Cr(VI) contact time and dose of AgNPs-AC upon removal of Cr(VI

Adsorption of hexavalent chromium by polyacrylonitrile

Jan 31 2018Adsorption of hexavalent chromium by polyacrylonitrile-based porous carbon from aqueous solution Abstract In this paper polyacrylonitrile (PAN)-based porous carbon materials (PPC-0 6-600 PPC-0 8-600 PPC-0 6-800 and PPC-0 8-800) were prepared by heating KOH at 600C and 800 o C for the removal of Cr(VI) from aqueous solution

Removal of Hexavalent Chromium from aqueous solution

to 200 mg The adsorption process was found to obey Langmuir adsorption isotherm and Freundlich adsorption isotherm Hence the use of the low cost carbon prepared is of practical importance and is expected to be economical Keywords: Activated carbon adsorption hexavalent chromium adsorbent diphenyl carbazide method

Hexavalent chromium adsorption by a novel activated carbon

The hexavalent chromium adsorption rate was found to be 19 1 mg g-1 at the optimized conditions of the process parameters i e initial concentration of 60 mg L-1 pH of 3 and operating temperature of 50 o C Adsorption of Cr(VI) by the prepared activated carbon was spontaneous and followed second-order kinetics The adsorption mechanism can

Chromium removal from water by activated carbon developed

May 10 2012The developed AC was tested and evaluated as potential adsorbent removal of chromium (III) Experimental parameters such as contact time initial concentration adsorbent dosage and pH were optimized A rapid uptake of chromium ions was observed and the equilibrium is achieved in 1 h It was also found that the adsorption process is pH dependent

Hexavalent chromium adsorption by a novel activated carbon

Microwave heating reduces the preparation time and improves the adsorption quality of the activated carbon Palm kernel fiber was used in this study to prepare activated carbon by impregnation with phosphoric acid followed by microwave activation

Adsorption of chromium ion (VI) by acid activated carbon

ABSTRACT The activated carbon produced from olive stones was chemically activated using sulfuric acid (OS-S) and utilized as an adsorbent for the removal of Cr(VI) from aqueous solution in the concentration range 4-50 mg/L Adsorption experiments were carried out in a batch process and various experimental parameters such as effect of contact time initial chromium ion concentration carbon

Hexavalent chromium adsorption by a novel activated carbon

T1 - Hexavalent chromium adsorption by a novel activated carbon prepared by microwave activation AU - Kundu A AU - Redzwan Ghufran AU - Sahu J N AU - Mukherjee S AU - Sen Gupta Bhaskar AU - Hashim M A N1 - M1 - Article PY - 2014/2/1 Y1 - 2014/2/1

Adsorption Characteristics of Chromium(VI) on Granular

Sep 25 2013The adsorption of Chromium(VI) from aqueous solutions was studied on different commercial grades of granular activated carbon namely Filtrasorb F‐400 F‐300 F‐200 and F‐100 The adsorption of Chromium (VI) on F‐400 carbon was found to be maximum in comparison to the other grades of carbon

Hexavalent Chromium Removal from Groundwater—A Low

Hexavalent chromium is a carcinogenic compound often encountered in contaminated aquifers Cr(VI) can be found in groundwater either as the re sult of the natural oxidat ion of the Cr(III) mainly granular-activated carbon on the adsorption and/or reduction of Cr(VI) was evaluated in experimental setups as well as its applicability as a

Adsorption of Chromium on Activated Carbon Prepared

activated carbon can be used as a good adsorbent for the removal of hexavalent chromium from electroplating industries Key words - Activated carbon adsorption electroplating industry hexavalent chromium SEM 1 Introduction Chromium (VI) is highly toxic in

Adsorption of hexavalent chromium by polyacrylonitrile

Adsorption of hexavalent chromium by polyacrylonitrile-based porous carbon from aqueous solution Bin Feng 1 Wenzhong Shen 2 Liyi Shi 1 and Shijie Qu 2 Recently activated carbon has been widely used as an adsorbent to handle Cr(VI) in water pollution problems as it is simple inexpensive easy to expand and removes low concentrations of

Adsorption of chromium on activated carbon

6-1 Schematic of the Activated Carbon Column Process for Hexavalent Chromium Adsorption 170 viii Abstract of Dissertation Presented to the Graduate Council of the University of Florida in Partial Fulfillment of the Requirements for the Degree of Doctor of Philosophy ADSORPTION OF CHROMIUM ON ACTIVATED CARBON By Jung I Kim March 1976

Adsorption of hexavalent chromium from aqueous solution by

Adsorption of hexavalent chromium from aqueous solution by activated carbon prepared from almond shell: kinetics equilibrium and thermodynamics study it must be regenerated and the activated carbon reused The adsorption Cr (VI) on ASAC is a physico-sorption process In the present study the adsorption of Cr (VI) is highly dependent on pH

Kinetics and thermodynamics of hexavalent chromium

Apr 01 2012Adsorption of hexavalent chromium onto activated carbon derived from acrylonitrile-divinylbenzene has been studied in aspect to thermodynamic and kinetics Chromium adsorption has been investigated using different process parameters like pH carbon

Hexavalent chromium adsorption by a novel activated carbon

T1 - Hexavalent chromium adsorption by a novel activated carbon prepared by microwave activation AU - Kundu A AU - Redzwan Ghufran AU - Sahu J N AU - Mukherjee S AU - Sen Gupta Bhaskar AU - Hashim M A N1 - M1 - Article PY - 2014/2/1 Y1 - 2014/2/1

Sequestration of hexavalent chromium from aqueous

The purpose of this study was to investigate the feasibility of activated carbons prepared from Macadamia nutshells as an efficient adsorbent for the removal of hexavalent chromium (Cr(VI)) from aqueous solutions The activated carbon was characterized by Fourier transform infrared spectroscopy (FTIR) scanning electron microscopy (SEM) CHNS analyzer and Brunauer–Emmett–Teller (BET)

Hexavalent chromium adsorption by a novel activated carbon

Microwave heating reduces the preparation time and improves the adsorption quality of the activated carbon Palm kernel fiber was used in this study to prepare activated carbon by impregnation with phosphoric acid followed by microwave activation

Chromium removal from water by activated carbon developed

May 10 2012The developed AC was tested and evaluated as potential adsorbent removal of chromium (III) Experimental parameters such as contact time initial concentration adsorbent dosage and pH were optimized A rapid uptake of chromium ions was observed and the equilibrium is achieved in 1 h It was also found that the adsorption process is pH dependent

CiteSeerX — Kinetics of Hexavalent Chromium Adsorption on

CiteSeerX - Document Details (Isaac Councill Lee Giles Pradeep Teregowda): Abstract: The kinetics of Cr(VI) adsorption on granular activated carbon (GAC) Nobrac CG 700 was investigated in batch system over the pH range of 1 10 – 4 05 at 24o C The effect of pH was observed and experimental data has been interpreted in terms of zero-order first-order second-order pseudo first-order and

Removal of Chromium (VI) from Tannery Effluent Using Bio

The potential of the Senegal date palm (Phoenix reclinata) seed bio-char to remove chromium (VI) ions from aqueous solutions by adsorption was investigated Adsorption experiments were performed on the tannery effluent and standard aqueous solutions of chromium (VI) for varying adsorbent doses contact times pH temperatures and interfering anionic ions by batch mode

Adsorption Characteristics of Chromium(VI) on Granular

Sep 25 2013The adsorption of Chromium(VI) from aqueous solutions was studied on different commercial grades of granular activated carbon namely Filtrasorb F‐400 F‐300 F‐200 and F‐100 The adsorption of Chromium (VI) on F‐400 carbon was found to be maximum in comparison to the other grades of carbon

Adsorption of Hexavalent Chromium on Granular Activated

granular activated carbon resulting in a composite adsorbent which showed improved performance This novel adsorbent could therefore be scaled and applied for removal of the toxic hexavalent chromium ions from textile wastewater Index Terms- GAC Mg/Fe-GAC-LDH hexavalent chromium adsorption isotherms

[PDF] HEXAVALENT CHROMIUM REMOVAL FROM AQUEOUS

Hexavalent chromium is one of the contaminants recognized as a carcinogenic and mutagenic agent Therefore it is essential to remove it from wastewater before disposal In this study removal of hexavalent chromium via adsorption on commercial granular activated carbon (GAC) was investigated as a function of adsorbent dosage initial solution pH initial Cr (VI) concentration contact

Adsorption of hexavalent chromium from aqueous solutions

Abstract In this research adsorption of chromium (VI) ions on wheat bran has been studied through using batch adsorption techniques The main objectives of this study are to 1) investigate the chromium adsorption from aqueous solution by wheat bran 2) study the influence of contact time pH adsorbent dose and initial chromium concentration on adsorption process performance and 3) determine

Adsorption of hexavalent chromium in aqueous solution on

Mar 01 2018Similar trend of hexavalent chromium adsorption as a function of initial Cr(VI) concentration has also been reported previously by Ullah et al (2013) (native and immobilized sugarcane bagasse waste) Hyder et al (2015) (bone char) and Demirbas et al (2004) (activated carbons prepared from agricultural wastes: cornelian cherry apricot