RO/NF treatment of wastewater from fertilizer factory — removal of fluoride and phosphate

Dolar, Davor; Košutić, Krešimir; Vučić, Barbara

doi:10.1016/j.desal.2010.07.057

Cited by 118 publications

(63 citation statements)

References 28 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…In addition to natural dissolution of minerals, industrial operations such as fertilizer plants, metallurgical industries, semiconductor production generate effluents with high F − and As. In the case of phosphate production, F − in effluents can reach up to 3000 ppm (Ndiaye et al 2005;Dolar et al 2011). The sources of As in Pakistan include natural processes such as the dissolution of As compounds adsorbed onto pyrite ores.…”

Section: Global Perspectivesmentioning

confidence: 99%

Co-occurrence of arsenic and fluoride in the groundwater of Punjab, Pakistan: source discrimination and health risk assessment

Rasool

Xiao

Baig

et al. 2015

Environ Sci Pollut Res

View full text Add to dashboard Cite

The present study discusses elevated groundwater arsenic (As) and fluoride (F(-)) concentrations in Mailsi, Punjab, Pakistan, and links these elevated concentrations to health risks for the local residents. The results indicate that groundwater samples of two areas of Mailsi, Punjab were severely contaminated with As (5.9-507 ppb) and F(-) (5.5-29.6 ppm), as these values exceeded the permissible limits of World Health Organization (10 ppb for As and 1.5 ppm for F(-)). The groundwater samples were categorized by redox state. The major process controlling the As levels in groundwater was the adsorption of As onto PO4 (3-) at high pH. High alkalinity and low Ca(2+) and Mg(2+) concentrations promoted the higher F(-) and As concentrations in the groundwater. A positive correlation was observed between F(-) and As concentrations (r = 0.37; n = 52) and other major ions found in the groundwater of the studied area. The mineral saturation indices calculated by PHREEQC 2.1 suggested that a majority of samples were oversaturated with calcite and fluorite, leading to the dissolution of fluoride minerals at alkaline pH. Local inhabitants exhibited arsenicosis and fluorosis after exposure to environmental concentration doses of As and F(-). Estimated daily intake (EDI) and target hazard quotient (THQ) highlighted the risk factors borne by local residents. Multivariate statistical analysis further revealed that both geologic origins and anthropogenic activities contributed to As and F(-) contamination in the groundwater. We propose that pollutants originate, in part, from coal combusted at brick factories, and agricultural activities. Once generated, these pollutants were mobilized by the alkaline nature of the groundwater.

show abstract

Section: Global Perspectivesmentioning

confidence: 99%

Co-occurrence of arsenic and fluoride in the groundwater of Punjab, Pakistan: source discrimination and health risk assessment

Rasool

Xiao

Baig

et al. 2015

Environ Sci Pollut Res

View full text Add to dashboard Cite

show abstract

“…As a result of the serious efforts of researchers all over the world in the field of pollution control and management, a number of methodologies with varying degrees of success have been developed to remove chromate and phosphate from water and wastewater. Common methods include chemical precipitation [5], reverse osmosis [6], ion exchange [7], electro-dialysis [8], uptake [9] and biosorption [10]. However, these techniques have some disadvantages such as high cost, low efficiency, low selectivity, high-energy requirements, and sludge generation [11].…”

Section: Introductionmentioning

confidence: 98%

Kinetics and thermodynamics of chromate and phosphate uptake by polypyrrole: batch and column studies

Hammud

Abbas

Al-khalili

2015

J Incl Phenom Macrocycl Chem

View full text Add to dashboard Cite

Polypyrrole sorption performance for removal of phosphate and chromate anions from water was evaluated by batch and column studies. The uptake isotherms, kinetics, chromate recycling, and experimental conditions such as temperature, pH, and dosage were optimized. The uptake data fitted Freundlich isotherm model very well, and the removal process was found to be endothermic and spontaneous in nature. The results indicate that the removal of both anions is a physisorption process. The kinetic data were described better by the pseudo second-order kinetic model. The maximum uptake capacities for phosphate and chromate anions were 120 and 26 mg/g respectively. The uptake equilibrium for phosphate and chromate was attained in 120 and 60 min respectively. The solution pH showed insignificant effect on anions removal over a pH range from 2.0 to 10.0. Three well known column uptake models, Thomas, Yoon and Nelson and Yan et al., were used to analyze the experimental data of chromate removal from water by polypyrrole. Thomas model showed better fitting than other models. Polypyrrole was regenerated and reused by using 0.1 M HCl solution. This polymer is a promising sorbent than other materials for phosphate and chromate removal from wastewater.

show abstract

“…En los procesos industriales llevados a cabo por las empresas dedicadas a la industria galvánica o de recubrimientos superficiales, a la manufactura de vidrio y semiconductores [1,2], metalúrgicos como el sangrado del magnesio y los licores de las plantas electrolíti-cas de zinc [3], o la industria del aluminio, fertilizantes o aditivos al agua [4], compuestos organofluorados, fundiciones de aluminio, fabricación de ladrillos y las centrales térmicas de carbón [5], etc. se genera un vertimiento contaminado principalmente por fluoruro de sodio (NaF), que puede llegar a tener una concentración de 3 g/L de fluoruro [5] y mediante la electrodiálisis es posible tratar estas corrientes para disminuir la concentración de contaminantes hacia los cuerpos de agua y como valor agregado obtener ácido fluorhídrico (HF) e hidróxido de sodio (NaOH), que posteriormente podrían ser comercializados o reutilizados en los procesos industriales.…”

Section: Introductionunclassified

“…se genera un vertimiento contaminado principalmente por fluoruro de sodio (NaF), que puede llegar a tener una concentración de 3 g/L de fluoruro [5] y mediante la electrodiálisis es posible tratar estas corrientes para disminuir la concentración de contaminantes hacia los cuerpos de agua y como valor agregado obtener ácido fluorhídrico (HF) e hidróxido de sodio (NaOH), que posteriormente podrían ser comercializados o reutilizados en los procesos industriales.…”

Section: Introductionunclassified

“…Para la adsorción, se usan distintos materiales, como por ejemplo materiales compuestos de Zr-Mn [12]. El tratamiento por precipitación reduce altas concentraciones de fluoruro hasta 2 mg/L [16], mientras que las técnicas de membrana (nanofiltración, osmosis inversa, electrodiálisis) se han desarrollado para remover fluoruros de aguas que contienen entre 5 y 20 mg/L [15] y remover más del 95% de los fluoruros [5]; para la comprensión del fenómeno electrocinético en soluciones concentradas puede remitirse a algunos estudios presentados [17].…”

Section: Introductionunclassified

See 1 more Smart Citation

Diseño básico de una celda electrolítica para la defluorización de aguas residuales industrialespor electrodialisis

Mayorga¹,

Ariza

2013

Ingenium Rev. fac. ing.

View full text Add to dashboard Cite

ResumenEl diseño básico presentado tiene por objetivo elaborar un modelo matemático, que basándose en los modelos teóricos, permita estudiar el transporte de los iones en disolución a través de las membranas de intercambio iónico y teniendo en cuenta la configuración de los diferentes circuitos de los que consta la celda objeto de estudio, se plantean las ecuaciones que describen los principales fenómenos de hidrodinámica y transferencia de masa que tienen lugar dentro de la misma celda de electrodiálisis. Dicho modelo puede ser aplicado para dimensionar equipos para la remoción de fluoruro de sodio en vertimientos industriales, reduciendo así la carga excesiva de flúor en las fuentes hídricas (que puede generar enfermedades como la fluorosis dental en la población) y la recuperación de materiales que pueden ser transformados en otros productos comerciales.

show abstract

RO/NF treatment of wastewater from fertilizer factory — removal of fluoride and phosphate

Cited by 118 publications

References 28 publications

Co-occurrence of arsenic and fluoride in the groundwater of Punjab, Pakistan: source discrimination and health risk assessment

Co-occurrence of arsenic and fluoride in the groundwater of Punjab, Pakistan: source discrimination and health risk assessment

Kinetics and thermodynamics of chromate and phosphate uptake by polypyrrole: batch and column studies

Diseño básico de una celda electrolítica para la defluorización de aguas residuales industrialespor electrodialisis

Contact Info

Product

Resources

About