Removal of phosphate from aqueous solution by red mud using a factorial design

Zhao, Ying; Wang, Jun; Luan, Zhaokun; Peng, Xianjia; Liang, Zhen; Shi, Li

doi:10.1016/j.jhazmat.2008.10.114

Cited by 123 publications

(60 citation statements)

References 36 publications

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“…The average chemical composition of RM was listed in Table 1, RM is mainly consisted of Ca, Si, Fe and Al oxides. The single-point N 2 -BET method indicated that the specific surface area of a typical RM sample was about 14.76 m 2 g −1 [18].…”

Section: Materials and Reagentsmentioning

confidence: 99%

Arsenic removal from aqueous solution using ferrous based red mud sludge

Wang

Luan

et al. 2010

Journal of Hazardous Materials

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a b s t r a c tFerrous based red mud sludge (FRS) which combined the iron-arsenic co-precipitation and the high arsenic adsorption features was developed aimed at low arsenic water treatment in rural areas. Arsenic removal studies shown that FRS in dosage of 0.2 or 0.3 g/l can be used effectively to remove arsenic from aqueous solutions when initial As(V) concentration was 0.2 or 0.3 mg/l. Meanwhile, turbidity of supernatant in disturbing water was lower than 2 NTU after 24 h. The pH range (4.5-8.0) for FRS in effective arsenic removal was applicable in natural circumstance. Phosphate can greatly reduce the arsenic removal efficiency while the presence of carbonate had no significant effect on arsenic removal. Arsenic fractionation experiments showed that amorphous hydrous oxide-bound arsenic was the major components. When aqueous pH was decreased from 8.0 to 4.5, arsenic in FRS was not obviously released. The high arsenic uptake capability, good settlement performance and cost-effective characteristic of FRS make it potentially attractive material for the arsenic removal in rural areas.

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Section: Materials and Reagentsmentioning

confidence: 99%

Arsenic removal from aqueous solution using ferrous based red mud sludge

Wang

Luan

et al. 2010

Journal of Hazardous Materials

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“…Previous studies have shown that the adsorption capacity of the phosphorus exists in many lowcost sorbents, such as fly ash [13], bentonite, natural zeolite, alum sludge [14], red mud [15][16][17][18], and other waste materials [19]. Red mud (RM) is a waste residue formed after the caustic digestion of bauxite during the production of alumina.…”

Section: Desalination and Water Treatmentmentioning

confidence: 99%

Phosphorus removal from domestic sewage by adsorption combined photocatalytic reduction with red mud

Zeng¹,

Xia²,

Dandan³

et al. 2013

Desalination and Water Treatment

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A B S T R A C TPhosphorus removal from domestic sewage by adsorption combined photocatalytic reduction with raw and modified red mud (RM) was studied in this paper. The results indicated that RM dosage, reaction time, stirring rate, phosphorus concentration, and initial pH of solution (pH i ) were the main factors to effect on phosphorus removal. It was found that the phosphorus removal efficiency of modified red mud (RM-m) under the photocatalytic test conditions was higher than only by adsorption process, while raw red mud (RM-raw) showed no significant difference under the two conditions. With initial phosphorus concentration 8.26 mg/L, reaction time 60 min, stirring rate 200 r/min, under the adsorption and photocatalytic test conditions, the optimum dosage and pH i of both RM-raw and RM-m were 1.8 g/L and 4.0, respectively, and the corresponding phosphorus removal of RM-raw and RM-m were 90.18 and 91.70%, respectively. The optimum amount of RM-m under the two conditions were 1.6 and 1.5 g/L, respectively, the optimal pH i 3.0, correspondingly, the phosphorus removal could reach high up to 94.30 and 99.96%, respectively.

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“…Different types of low-cost, high-capacity materials have long been used to remove phosphate, such as granulated coal ash (Asaoka and Yamamoto, 2010), red mud Zhao et al, 2009;Yue et al, 2010) and lanthanum-doped vesuvianite (Li et al, 2009). Researchers have investigated ferric manganese oxide as an adsorbent for phosphate and arsenic removal .…”

Section: Phosphate Removal Using Novel Combinedmentioning

confidence: 99%

Phosphate removal using novel combined Fe-Mn-Si oxide adsorbent

Maeng¹,

Lee²,

Dockko³

2013

Journal of Korean Society of Water and Wastewater

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:The removal of phosphate from surface water is becoming increasingly vital to prevent problems such as eutrophication, particularly near urban areas. Recent requirements to reduce high concentrations of phosphate rely on physicochemical methods and adsorbents that must be effective even under strict conditions. The phosphate removal efficiencies of two adsorbents, Fe-Mn-Si oxide and Fe-Mn oxide, were investigated and the data used to compare kinetics and isotherm models. The maximum adsorption capacities of the two adsorbents were 47.8 and 35.5 mg-PO 4 3-/g, respectively. Adsorptions in both cases were highly pH dependent; i.e., when the pH increased from 3 to 9, the average adsorption capacities of the two adsorbents

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Removal of phosphate from aqueous solution by red mud using a factorial design

Cited by 123 publications

References 36 publications

Arsenic removal from aqueous solution using ferrous based red mud sludge

Arsenic removal from aqueous solution using ferrous based red mud sludge

Phosphorus removal from domestic sewage by adsorption combined photocatalytic reduction with red mud

Phosphate removal using novel combined Fe-Mn-Si oxide adsorbent

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