Removal of phosphate and fluoride from wastewater by a hybrid precipitation–microfiltration process

Lu, Nash C.; Liu, J.C.

doi:10.1016/j.seppur.2010.06.023

Cited by 130 publications

(42 citation statements)

References 24 publications

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“…Despite several advantages, MF cannot remove contaminants of size <1 µm (i.e., dissolved solids) and it is not useful for the removal of ECs [127,128]. Figure 2.…”

Section: Membrane Technologymentioning

confidence: 99%

Treatment technologies for emerging contaminants in water: A review

Rodríguez-Narváez

Peralta‐Hernández

Goonetilleke

et al. 2017

Chemical Engineering Journal

957

287

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“…Despite several advantages, MF cannot remove contaminants of size <1 µm (i.e., dissolved solids) and it is not useful for the removal of ECs [127,128]. Figure 2.…”

Section: Membrane Technologymentioning

confidence: 99%

Treatment technologies for emerging contaminants in water: A review

Rodríguez-Narváez

Peralta‐Hernández

Goonetilleke

et al. 2017

Chemical Engineering Journal

957

287

View full text Add to dashboard Cite

“…The excessive discharge of these pollutants into water bodies has deteriorated water quality subsequently [4]. Therefore, it is necessary to develop effective methods to remove phosphate and chromate anions from water and wastewater, especially at low concentrations in order to satisfy the stringent water standards.…”

Section: Introductionmentioning

confidence: 99%

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

Hammud

Abbas

Al-khalili

2015

J Incl Phenom Macrocycl Chem

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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.

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“…Various treatment procedures have been reported for the removal of excess fluoride from water e.g. adsorption (Tor et al, 2009), precipitation-micro filtration (Lu and Liu, 2010), ion-exchange (Solangi et al, 2009), electrocoagulation (Behbahani et al, 2011, Khatibikamal et al, 2010, reverse osmosis (Sehn, 2008) and electrodialysis (Banasiak and Schäfer, 2009). Among the methods, adsorption technique is economical, efficient and produces high-quality water.…”

Section: Introductionmentioning

confidence: 99%

A new adsorbent for fluoride removal: The utilization of sludge waste from electrocoagulation as adsorbent

2015

Global NEST Journal

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This work investigated the potential of calcined electrocoagulation sludge (CES) within metals hydroxide generated during removal of boron using Al electrode for adsorption of fluoride from aqueous solution. The effects of contact time, pH of the solution (2-10), stirrer speed (50-450 rpm), initial concentration (5-100 mg l ), solution temperature (293-333 K) and particle size (0.125-1000 µm) on fluoride removal were investigated. All the experiments were carried out by batch mode. It was found that the maximum adsorption takes place within 2 h at pH 6.0. The adsorption removal increased with increase in the adsorbent dose, but decreased with increase in fluoride concentration. It was found that the adsorption removal decreases with increase in temperature, which showed that the adsorption process was exothermic in nature. The decrease in particle size increased fluoride removal efficiency. The maximum adsorption capacity (qm) increased from 45.5 to 124.6 mg g -1 when the adsorbent dosage was adjusted to 1 instead of 4 g l -1. The Freundlich isotherm and Langmuir isotherm were used to fit the data of equilibrium experiments. The adsorption data fitted well into the linearly transformed Langmuir equation. The efficiency of CES to remove fluoride was found to be 99.99% at pH 6, contact time for 2 h, dose of 4 g l -1, when 25 mg l -1 of fluoride was present in 100 ml of water. Comparison with literature reported values of qm, it was found that CES was an attractive adsorbent.

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Removal of phosphate and fluoride from wastewater by a hybrid precipitation–microfiltration process

Cited by 130 publications

References 24 publications

Treatment technologies for emerging contaminants in water: A review

Treatment technologies for emerging contaminants in water: A review

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

A new adsorbent for fluoride removal: The utilization of sludge waste from electrocoagulation as adsorbent

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