Nutrient removal by NF and RO membranes in a decentralized sanitation system

Voorthuizen, E.M. van; Zwijnenburg, A.; Weßling, Matthias

doi:10.1016/j.watres.2005.06.005

Cited by 115 publications

(58 citation statements)

References 27 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…Several methods have been used to remove phosphate from wastewater, such as chemical precipitation [5], biological processes [6], adsorption [7], ion exchange [8], membrane technologies [9] and constructed wetlands [10]. Among these available approaches, adsorption method is believed to be one of the most economical, effective, and reliable methods.…”

Section: Introductionmentioning

confidence: 99%

Enhanced adsorption of phosphate from aqueous solution by nanostructured iron(III)–copper(II) binary oxides

Gao

Zhang

et al. 2014

Chemical Engineering Journal

179

View full text Add to dashboard Cite

Section: Introductionmentioning

confidence: 99%

Enhanced adsorption of phosphate from aqueous solution by nanostructured iron(III)–copper(II) binary oxides

Gao

Zhang

et al. 2014

Chemical Engineering Journal

179

View full text Add to dashboard Cite

“…De-Bashan and Bashan 2004), reverse osmosis (Van Voorthuizen et al 2005) and sorption processes (Morse et al 1998;Kang et al 2003). Among these techniques, adsorption is a promising method to treat waste water, especially at lower phosphate concentrations, which pose a challenge to the use of the traditional flocculation methods (Seida and Nakano 2002).…”

Section: Introductionmentioning

confidence: 99%

Adsorption of Phosphate from Aqueous Solution Using an Iron–Zirconium Binary Oxide Sorbent

Ren

Shao

Zhang

2012

Water Air Soil Pollut

119

View full text Add to dashboard Cite

In this study, an iron-zirconium binary oxide with a molar ratio of 4:1 was synthesized by a simple coprecipitation process for removal of phosphate from water. The effects of contact time, initial concentration of phosphate solution, temperature, pH of solution, and ionic strength on the efficiency of phosphate removal were investigated. The adsorption data fitted well to the Langmuir model with the maximum P adsorption capacity estimated of 24.9 mg P/g at pH 8.5 and 33.4 mg P/g at pH 5.5. The phosphate adsorption was pH dependent, decreasing with an increase in pH value. The presence of Cl − , SO 4 2− , and CO 3 2− had little adverse effect on phosphate removal. A desorbability of approximately 53 % was observed with 0.5 M NaOH, indicating a relatively strong bonding between the adsorbed PO 4 3− and the sorptive sites on the surface of the adsorbent. The phosphate uptake was mainly achieved through the replacement of surface hydroxyl groups by the phosphate species and formation of innersphere surface complexes at the water/oxide interface. Due to its relatively high adsorption capacity, high selectivity and low cost, this Fe-Zr binary oxide is a very promising candidate for the removal of phosphate ions from wastewater.

show abstract

“…Various techniques such as chemical precipitation [4], adsorption [5], reverse osmosis [6], biological removal [7,8], and constructed wetlands [9] have been employed for removal of phosphate from wastewaters. Among these available approaches, chemical precipitation and biological removal are generally not able to meet the stringent effluent standards and reverse osmosis is a high capital cost, while the adsorption methods proved to be more promising due to their low cost, effective treatment in dilute solutions, and high uptake capacity.…”

Section: Introductionmentioning

confidence: 99%

Removal of phosphate from water by a Fe–Mn binary oxide adsorbent

Zhang

Liu

et al. 2009

Journal of Colloid and Interface Science

386

155

View full text Add to dashboard Cite

a b s t r a c tPhosphate removal is important in the control of eutrophication of water bodies and adsorption is one of the promising approaches for this purpose. A Fe-Mn binary oxide adsorbent with a Fe/Mn molar ratio of 6:1 for phosphate removal was synthesized by a simultaneous oxidation and coprecipitation process. Laboratory experiments were carried out to investigate adsorption kinetics and equilibrium, in batch mode. The effects of different experimental parameters, namely contact time, initial phosphate concentration, solution pH, and ionic strength on the phosphate adsorption were investigated. The adsorption data were analyzed by both Freundlich and Langmuir isotherm models and the data were well fit by the Freundlich isotherm model. Kinetic data correlated well with the pseudo-second-order kinetic model, suggesting that the adsorption process might be chemical sorption. The maximal adsorption capacity was 36 mg/g at pH 5.6. The phosphate adsorption was highly pH dependent. The effects of anions such as Cl À ; SO 4 2À , and CO 3 2À on phosphate removal were also investigated. The results suggest that the presence of these ions had no significant effect on phosphate removal. The phosphate removal was mainly achieved by the replacement of surface hydroxyl groups by the phosphate species and formation of inner-sphere surface complexes at the water/oxide interface. In addition, the adsorbed phosphate ions can be effectively desorbed by dilute NaOH solutions. This adsorbent, with large adsorption capacity and high selectivity, is therefore a very promising adsorbent for the removal of phosphate ions from aqueous solutions.

show abstract

Nutrient removal by NF and RO membranes in a decentralized sanitation system

Cited by 115 publications

References 27 publications

Enhanced adsorption of phosphate from aqueous solution by nanostructured iron(III)–copper(II) binary oxides

Enhanced adsorption of phosphate from aqueous solution by nanostructured iron(III)–copper(II) binary oxides

Adsorption of Phosphate from Aqueous Solution Using an Iron–Zirconium Binary Oxide Sorbent

Removal of phosphate from water by a Fe–Mn binary oxide adsorbent

Contact Info

Product

Resources

About