Arsenic and fluoride removal from groundwater by electrocoagulation using a continuous filter-press reactor

Guzmán, Athziri; Nava, José L.; Coreño, Oscar; Rodríguez, Israel; Gutiérrez, Silvia

doi:10.1016/j.chemosphere.2015.10.108

Cited by 133 publications

(25 citation statements)

References 30 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Arsenic is considered as the reason of some diseases in the human organs such as skin, lung, bladder, and kidney, and also some health problems, including change of tissues pigments, thickening of the skin, neurological disorders, muscle weakness, anorexia, and nausea. The permitted value of arsenic in drinking water which has been reported by the World Health Organization (WHO), the European Union (EU), and the United States Environmental Protection Agency (EPA) is 10 μg/L …”

Section: Introductionmentioning

confidence: 99%

Adsorption of Lead and Arsenic Ions from Aqueous Solution by Activated Carbon Prepared from Tamarix Leaves

Koohzad¹,

Jafari

Esmaeili

2019

ChemistrySelect

View full text Add to dashboard Cite

Lead and arsenic are regarded as the significant heavy metal ions which have a great contribution in the pollution of industrial wastewaters. In this research, the adsorption of Pb (II) and As (III) ions from the aqueous solution was studied using activated carbon prepared from Tamarix leaves as a new adsorbent. The adsorbent was characterized by Brunauer, Emmett, and Teller (BET), X‐ray fluorescence spectrometer (XRF), scanning electron microscope (SEM), energy dispersive X‐ray and mapping (EDX/Map), X‐ray diffraction (XRD), and Raman techniques. Batch experiments were designed to investigate the significance of adsorption parameters including pH, adsorbent dosage, time, temperature, and initial concentration on Pb and As ions removal efficiencies. The experiments indicated that the highest adsorption efficiencies were 97.86% for lead and 96.18% for arsenic ions in pH values of 6 for Pb and 7 for As, adsorbent dosage of 3 g/L and initial concentration of 10 mg/L for both of them, and contact time of 60 min and 40 min for Pb and As ions, respectively. Additionally, the results of adsorption kinetics showed that the pseudo second‐order model was more effective for the description of adsorption mechanism of both metals compared to the pseudo first‐order model. The equilibrium behavior of arsenic and lead ions were described well by Langmuir and Freundlich models, respectively. In addition, thermodynamic studies showed that the current adsorption processes were exothermic and spontaneous. Based on the results, the prepared adsorbent can be considered as a good adsorbent for the removal of Pb and As ions from aqueous solutions.

show abstract

Section: Introductionmentioning

confidence: 99%

Adsorption of Lead and Arsenic Ions from Aqueous Solution by Activated Carbon Prepared from Tamarix Leaves

Koohzad¹,

Jafari

Esmaeili

2019

ChemistrySelect

View full text Add to dashboard Cite

show abstract

“…is a simple, versatile, and appropriate process for treating a drinking water system, especially for small communities. Adsorption can remove ions over a wide pH range and to residual concentrations lower than precipitation, and it is an economical technique (Guzmán, Nava, Coreño, Rodríguez & Gutiérrez, 2016;Rafique, Awan, Wasti, Qazi & Arshad, 2013;Sujana & Anand, 2010). Today, there is a need to focus greater attention on the potential future damage to human health and the environmental impact caused by the fluoride ion, which has been found in drinking water (Mohapatra, Anand, Mishra, Giles & Singh, 2009;Valdez-Jiménez, Soria-Fregozo, Miranda-Beltrán, Gutiérrez-Coronado & Pérez-Vega, 2011).…”

Section: Introductionmentioning

confidence: 99%

Synthesis and characterization of gamma alumina and compared with an activated charcoal on the fluoride removal from potable well water

2016

View full text Add to dashboard Cite

Fluoride compounds are widely distributed in nature and are generated in many industrial processes. In many parts of the world, significant causes of diseases are associated with elevated concentrations in drinking water. In comparison with other techniques, adsorption onto a solid surface (activated alumina, activated charcoal, zeolites, etc.) is a simple, versatile, and appropriate process for removal the fluoride. In this study, we synthesized Gamma alumina (γ-Al 2 O 3 ) by homogeneous precipitation and compared its effectiveness at removing fluoride from water to a commercial brand activated charcoal. Process was carried out at pH 5 and 7. Fibrillar morphology of the γ-Al 2 O 3 powder presents high porosity in comparison with the activated charcoal that has many small pores in its compact structure. Mesoporous γ-Al 2 O 3 powder has a lower surface area (332 m 2 • g -1 ) than microporous charcoal powder (601 m 2 • g -1 ), as determined by both gas nitrogen adsorption-desorption and scanning electron microscopy. However, γ-Al 2 O 3 has a higher zeta potential and lower particle size than that determined for the activated charcoal. Adsorption isotherms of the fluoride removal concur with the Langmuir model for both adsorbents. γ-Al 2 O 3 removes up to 95.5% of fluoride ions, significantly more than the activated charcoal (26%) at pH 5. Thus, based on results obtained, the adsorption process is controlled by the diffusion of fluoride ions in liquid immediately adjacent the outer surface of the adsorbent material. RESUMENLos compuestos de fluoruro están ampliamente distribuidos en la naturaleza y se generan en varios procesos industriales. En muchas partes del mundo, las causas importantes de enfermedades están asociadas con concentraciones elevadas de estos elementos en el agua potable. En comparación con otras técnicas, la adsorción sobre una superficie sólida (alúmina activada, carbón activado, zeolitas, etc.) es un proceso simple, versátil y adecuado para la eliminación del fluoruro. La gamma alúmina (γ-Al 2 O 3 ) sintetizada por precipitación homogénea se comparó con carbón activado comercial para la eliminación del fluoruro presente en el agua. El proceso se realizó a pH 5 y pH 7. La morfología fibrilar del polvo de γ-Al 2 O 3 presenta alta porosidad en comparación con el carbón activado, que muestra una gran cantidad de pequeños poros en su estructura compacta. Según lo determinado por adsorción-desorción de gas nitrógeno, el polvo de γ-Al 2 O 3 mesoporosa tiene un área de superficie menor (332 m 2 • g -1 ) que la obtenida para el polvo de carbón activado microporoso (601 m 2 • g -1 ), concordando con la porosidad observada por microscopía electrónica de barrido. Por otra parte, la γ-Al 2 O 3 tiene un potencial zeta mayor y tamaño de partícula menor que la determinada para el carbón activado. Las isotermas de adsorción del fluoruro concuerdan con el modelo de Langmuir para ambos adsorbentes. La γ-Al 2 O 3 elimina hasta el 95.5% de ion fluoruro mucho más que el carbón activado (26%) a pH 5. Así, con...

show abstract

“…In B ranges from 1.0 to 1.5, PACl includes different Al species such as Al 2 , Al 4 , Al 7 and Al 13 et al [27], the ratios of monomeric Al species were observed to increase with lowered B. In this case coagulation dominated in the removal of fluoride, and different mechanisms such as complexed precipitation, charge attraction, and ion exchanges involve in and facilitated fluoride removal accordingly [32,33]. At low B of below 0.5, the monomeric Al species tends to dissolve at low pH and cannot effectively remove fluoride.…”

Section: Removal Efficiency Of Fluoride By Pacl With Different Basicitymentioning

confidence: 99%

Coagulation behaviors of aluminum salts towards fluoride: Significance of aluminum speciation and transformation

Lan

Gong

et al. 2016

Separation and Purification Technology

View full text Add to dashboard Cite

a b s t r a c tThis study investigates the effects of aluminum (Al) and F interactions on the coagulation behaviors of Al salts, i.e., AlCl 3 and polymer aluminum chloride (PACl) at different basicity (B) towards fluoride. These coagulants achieve the optimum fluoride removal over pH 6-7, and PACl exhibits higher removal efficiency than AlCl 3 does over pH 4-9. The removal of fluoride is positively correlated with the content of either Al 13 or Al b in Al-based coagulants over pH 4-9 and increases in the order: PACl 2 > PACl 1 > AlCl 3 . As for PACl, the increased B from 0 to 2.4 improves fluoride removal owing to the elevated ratios of Al b . However, at further increased B to 2.8, the formation of colloidal Al species

show abstract

Arsenic and fluoride removal from groundwater by electrocoagulation using a continuous filter-press reactor

Cited by 133 publications

References 30 publications

Adsorption of Lead and Arsenic Ions from Aqueous Solution by Activated Carbon Prepared from Tamarix Leaves

Adsorption of Lead and Arsenic Ions from Aqueous Solution by Activated Carbon Prepared from Tamarix Leaves

Synthesis and characterization of gamma alumina and compared with an activated charcoal on the fluoride removal from potable well water

Coagulation behaviors of aluminum salts towards fluoride: Significance of aluminum speciation and transformation

Contact Info

Product

Resources

About