Nutrients adsorption from seawater by new porous carrier made from zeolitized fly ash and slag

Khelifi, Olfa; Kozuki, Yasunori; Murakami, Hitoshi; Kurata, K.; Nishioka, Mamuro

doi:10.1016/s0025-326x(02)00107-8

Cited by 35 publications

(21 citation statements)

References 10 publications

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“…The removal of heavy metal ions, such as Pb, Ni, Cu, Zn and Cr from slag has been found to depend mainly on the replacement of Ca 2+ by the target heavy metal ions [7][8][9][10]. The adsorption of ammonium and phosphate ions from seawater by acid-treated slag has been studied [11]. In the present study, steel-making slag was activated by grinding and calcining at various temperatures.…”

Section: Introductionmentioning

confidence: 93%

“…Although the maximum uptake of PO 4 3− by the slag sample is lower than Ni 2+ uptake, it is much higher than reported for fly ash (0.009 mmol/g), shale (0.007 mmol/g), bauxite (0.0064 mmol/g), burnt oil shale (0.006 mmol/g), limestone (0.007 mmol/g), zeolite (0.005 mmol/g), lightweight expanded clay aggregates (0.0044 mmol/g) [15], alum (0.03 mmol/g) [16], ␥-alumina (0.33 mmol/g) [17] and acid treated slag (1.05 mmol/g) [11]. Furthermore, the maximum NH 4 + uptake by the present samples is higher than by sepiolite (0.1 mmol/g) [18] and acid treated slag (0.007 mmol/g) [11] but lower than for composites of ␥-alumina/potassium aluminisilicate gel (3 mmol/g) [17], clinoptilolite (0.8 mmol/g) [19].…”

Section: Nh 4 + and Po 4 3− Uptake Propertiesmentioning

confidence: 99%

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Hazardous ions uptake behavior of thermally activated steel-making slag

Jha

Kameshima

Nakajima

et al. 2004

Journal of Hazardous Materials

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Section: Introductionmentioning

confidence: 93%

Section: Nh 4 + and Po 4 3− Uptake Propertiesmentioning

confidence: 99%

Hazardous ions uptake behavior of thermally activated steel-making slag

Jha

Kameshima

Nakajima

et al. 2004

Journal of Hazardous Materials

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“…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). In recent decades, booming studies have been focused on the selection of ideal P adsorption materials (Agyei et al 2000;Arias et al 2001;Khelifi et al 2002;Tanada et al 2003;Zeng et al 2004). Among them, hydrous zirconium oxide has remarkable selectivity to phosphoric ion (Urnius et al 2000), and also high resistance against attacks by acids, alkalis, oxidants, and reductants (Suzuki et al 2000).…”

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

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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.

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“…Among natural materials, sand has been observed to act as a sorbent for phosphorus in constructed reed beds (Arias et al, 2001;Bubba et al, 2003). Many researchers (Ugurlu and Salman, 1998;Khelifi et al, 2002;Agyei et al, 2000Agyei et al, , 2002Grubb et al, 2000;Cheung and Venkitachalam, 2000;Sakadevan and Bavor, 1998;Johansson, 1999;Johansson and Gustafsson, 2000;Oguz, 2004) have all reported that fly ash and/or slag are highly efficient media for removing phosphorus in filtration and constructed wetland systems. Clay minerals and soils such as reactive Ca, Fe and Al have also been shown to strongly adsorb phosphorus, the efficiency depending on their composition (Yuan et al, 2005).…”

Section: Introductionmentioning

confidence: 99%

Evaluation of phosphorus removal from wastewater by soils in rural areas in China

Liang

Liu

Wei

et al. 2010

Journal of Environmental Sciences

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Low-cost, easy-maintenance and high-efficiency decentralized wastewater treatment technologies are urgently needed in rural areas of China. Processes with high potential for phosphorus removal are of great interest. However, commonly used treatment methods often do not meet the strict criteria for removing phosphorus from rural wastewater. In order to search an economic and simple technology for phosphorus removal from the common bio-technologies effluent, seven soil types collected from different rural areas in China were investigated for their ability to remove phosphorus. X-ray diffraction (XRD) was used to analyse the mineral structure, and inductively coupled plasma optical emission spectrometer (ICP-OES) was used to analyse the geochemical composition of the soil samples. Three primary minerals -quartz, albite and montmorillonite -were clearly detected. The samples were divided into two soil types, acidic soils and alkaline soils, based on their pH values. The geochemical composition study indicated that a higher percentage of Ca and Mg occurred in alkaline soils (pH > 8) than in acidic soils (pH < 6.5). Adsorption isotherms from batch experiments fitted the Langmuir and Freundlich models well, the maximum P adsorption capacities ranged from 0.256 to 1.598 mg P/g, indicating a high phosphorus removal potential for all of these soils. The P fractions extracted revealed that the sum of NaOH-extracted inorganic P (NaOH-Pi) was the major P component in the acidic soils, and CaCO 3 -bound phosphorus (Ca-P) in the alkaline soils. Dynamic adsorption simulation showed that these soils have the ability to remove phosphorus from wastewater.

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Nutrients adsorption from seawater by new porous carrier made from zeolitized fly ash and slag

Cited by 35 publications

References 10 publications

Hazardous ions uptake behavior of thermally activated steel-making slag

Hazardous ions uptake behavior of thermally activated steel-making slag

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

Evaluation of phosphorus removal from wastewater by soils in rural areas in China

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