scholarly journals Performance evaluation of ALCAN-AASF50-ferric coated activated alumina and granular ferric hydroxide (GFH) for arsenic removal in the presence of competitive ions in an active well :Kirtland field trial - initial studies.

2006 ◽  
Author(s):  
Linnah L Neidel ◽  
James Lee Krumhansl ◽  
Malcolm Dean Siegel ◽  
Nadim Reza Khandaker
Keyword(s):  
Performance Evaluation ◽  
Field Trial ◽  
Arsenic Removal ◽  
Ferric Hydroxide ◽  
Activated Alumina ◽  
Granular Ferric Hydroxide ◽  
Competitive Ions

Arsenic removal from groundwater by Anjili tree sawdust impregnated with ferric hydroxide and activated alumina

2015 ◽  
Vol 16 (1) ◽  
pp. 115-127 ◽  
Author(s):  
P. Dhanasekaran ◽  
P. M. Satya Sai ◽  
C. Anand Babu ◽  
R. Krishna Prabhu ◽  
K. K. Rajan
Keyword(s):  
Arsenic Removal ◽  
Heart Diseases ◽  
Ferric Hydroxide ◽  
Sorption Kinetics ◽  
Activated Alumina ◽  
Maximum Sorption Capacity ◽  
Maximum Sorption ◽  
Freundlich Adsorption Isotherm ◽  
Pseudo Second Order ◽  
Removal Of Arsenic

Arsenic is a toxic element found naturally in groundwater. Due to its carcinogenicity, risk for heart diseases and diabetes, arsenic needs to be removed from groundwater for potable application. ‘Anjili’ tree sawdust was chemically modified with ferric hydroxide and activated alumina (SFAA) and used as an adsorbent for the removal of arsenic from groundwater. The adsorbent was characterized using scanning electron microscopy (SEM), Fourier transform infrared (FTIR) to study the pore structure and surface functional groups. Effect of contact time, initial concentration, pH, particle size and temperature was studied. Arsenic adsorbed by SFAA followed Freundlich adsorption isotherm. Maximum sorption of arsenic by SFAA adsorbent occurred at pH 6.5. Arsenic sorption kinetics followed a pseudo-second-order model. The maximum sorption capacity at 303 K was found to be 54.32 mg/g for As(III) and 77.60 mg/g for As(V). Interference of other ions on the adsorption was in the order of PO43− > SO42− > HCO3− > NO3−.

Arsenic removal - experience with the GEH® process in Germany

2002 ◽  
Vol 2 (2) ◽  
pp. 275-280 ◽  
Author(s):  
W. Driehaus
Keyword(s):  
Drinking Water ◽  
Arsenic Removal ◽  
Ferric Hydroxide ◽  
Drinking Water Treatment ◽  
Treatment Results ◽  
Design Data ◽  
Drinking Water Standard ◽  
Water Treatment Plants ◽  
Trade Name ◽  
Granular Ferric Hydroxide

The reduced German drinking water standard for arsenic of 10 μg/L initiated the development of a new adsorbent, the granular ferric hydroxide. It was introduced into the market in 1997 under the trade name GEH®. 16 drinking water treatment plants for arsenic removal are now using this technique in Germany. The article gives a brief overview over this applications, the design data and the treatment results. This technique requires only small contact times between 3 and 10 minutes, whereas the treatment capacities are up to 250,000 bed volumes. The average treatment costs, including media supply, media exchange service and disposal, are 0.04 EURO per m3 treated water.

scholarly journals Arsenic removal from drinking water using granular ferric hydroxide

Water SA ◽  
2003 ◽  
Vol 29 (2) ◽  
Author(s):  
O.S. Thirunavukkarasu ◽  
T. Viraraghavan ◽  
K.S. Subramanian
Keyword(s):  
Drinking Water ◽  
Arsenic Removal ◽  
Ferric Hydroxide ◽  
Granular Ferric Hydroxide

Arsenic removal from groundwater through iron oxyhydroxide coated waste productsA paper submitted to the Journal of Environmental Engineering and Science.

2009 ◽  
Vol 36 (5) ◽  
pp. 881-888 ◽  
Author(s):  
Elsadig A.M. Abdallah ◽  
Graham A. Gagnon
Keyword(s):  
Ferric Oxide ◽  
Arsenic Removal ◽  
Ferric Hydroxide ◽  
Structure Surface ◽  
Seafood Industry ◽  
Isotherm Adsorption ◽  
Scallop Shells ◽  
Glass Recycling ◽  
By Products ◽  
Better Than

The goal of this research was to remove arsenic from groundwater supplies via adsorption into media obtained from waste material generated as by-products from glass recycling programs and the seafood industry such as crushed glass and scallop shells. During the course of this research four new adsorbents were developed: ferric hydroxide coated crushed glass (FHCCG); ferric oxide coated crushed glass (FOCCG); ferric hydroxide coated scallop shells (FHCSS); and ferric oxide coated scallop shells (FOCSS). The adsorbents were characterized through evaluation of their structure, surface area, chemical composition, iron content, and coating stability. Efficiency of the adsorbents to remove arsenic from water was examined through batch kinetic and isotherm adsorption experiments. The adsorption capacity of the adsorbents was also evaluated by performing column experiments using real ground waters and a synthetic water. Arsenic removal to a concentration less than 10 μg/L was achieved with the FHCSS and more than 9000 bed volumes of water were treated before the breakthrough point was reached. The research results revealed that scallop shells coated with ferric hydroxideperformed better than crushed glass coated with ferric hydroxide. Both FOCCG and FOCSS had poor arsenic removal compared with FHCSS and granular ferric hydroxide (GFH). Ferric hydroxide coated scallop shells performed similarly to GFH.

NOM removal by adsorption onto granular ferric hydroxide: Equilibrium, kinetics, filter and regeneration studies

2008 ◽  
Vol 42 (1-2) ◽  
pp. 238-248 ◽  
Author(s):  
Arne Genz ◽  
Benno Baumgarten ◽  
Mandy Goernitz ◽  
Martin Jekel
Keyword(s):  
Ferric Hydroxide ◽  
Granular Ferric Hydroxide

Silicate Hindering In Situ Formed Ferric Hydroxide Precipitation: Inhibiting Arsenic Removal from Water

2007 ◽  
Vol 24 (5) ◽  
pp. 707-715 ◽  
Author(s):  
Ruiping Liu ◽  
Jiuhui Qu ◽  
Shengji Xia ◽  
Gaosheng Zhang ◽  
Guibai Li
Keyword(s):  
Arsenic Removal ◽  
Ferric Hydroxide

Arsenic removal by ferric-chloride coagulation – effect of phosphate, bicarbonate and silicate

2011 ◽  
Vol 64 (5) ◽  
pp. 1046-1055 ◽  
Author(s):  
Dóra Laky ◽  
István Licskó
Keyword(s):  
Adverse Effect ◽  
Arsenic Removal ◽  
Linear Regression Analysis ◽  
Arsenic Concentration ◽  
Ferric Hydroxide ◽  
Multiple Linear Regression Analysis ◽  
Ph Values ◽  
Robust Model ◽  
Coagulant Dosage ◽  
Negative Effect

Jar tests with synthetic water were carried out in order to investigate the effect of phosphate, bicarbonate and silicate on arsenic removal efficiency by in-situ formed ferric hydroxide. Above 12 mg C/L inorganic carbon concentration, the adverse effect of bicarbonate was definite, and resulted in higher remaining arsenic concentration. At all pH values (7.5–7.8) and coagulant dosages (0.84–3.00 mg/L Fe) tested, the negative effect of phosphate on arsenic removal was also evident. In the presence of silicate small ferric-hydroxide colloids were formed, which were able to go through the 0.45 μm pore-size membrane. Compared to silicate-free systems, 2.5–3.5 times higher coagulant dose was needed to achieve the target arsenic concentration in the presence of 14–23 mg/L Si. At higher pH values the adverse effect of silicate was even more significant. All data were merged and multiple linear regression analysis was carried out in order to build up a robust model to predict the residual arsenic concentration if the raw water contains 50–60 μg/L initial arsenic concentration. The estimation was based on the following variables: PO4-P concentration, final pH, Si concentration, Fe(III) dose. The most important influencing factors proved to be the silicate concentration and applied coagulant dosage.

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