Equilibrium and kinetic studies of adsorption of phosphate onto ZnCl2 activated coir pith carbon

Namasivayam, C.; Sangeetha, D.

doi:10.1016/j.jcis.2004.08.015

Cited by 238 publications

(126 citation statements)

References 16 publications

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“…Though a high correlation coefficient (R 2 > 0.9) is obtained in each model, the phosphate adsorption in the present study most closely followed pseudo-second-order kinetics, by which a very accurate estimation of q e is achieved as well as the highest correlation coefficient (R 2 > 0.99) ( Table 3). Comparable results were observed in phosphate adsorption onto ZnCl 2 activated coir pith carbon [31], calcined electrocoagulated metal hydroxides sludge [32], amorphous zirconium hydroxide [14] and dolomite [33].…”

Section: Adsorption Kineticsmentioning

confidence: 74%

“…where C e (mg/L) is the phosphate concentration at equilibrium, q e (mg/L) the corresponding adsorption capacity, q m (mg/g) the maximum adsorption capacity and b (L/mg) the affinity coefficient [31]. The essential characteristics of the Langmuir model can be described by a dimensionless constant called the equilibrium parameter R L ,…”

Section: Adsorption Isothermmentioning

confidence: 99%

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Phosphate adsorption from sewage sludge filtrate using zinc–aluminum layered double hydroxides

Cheng

Huang

Wang

et al. 2009

Journal of Hazardous Materials

207

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a b s t r a c tA series of layered double hydroxides (LDHs) with different metal cations were synthesized to remove phosphate in waste sludge filtrate from a municipal wastewater treatment plant for phosphorus recovery and to help control eutrophication. The highest phosphate adsorption capacity was obtained by using Zn-Al-2-300, that is LDHs with Zn/Al molar ratio of 2 and calcined at 300 • C for 4 h. Circumneutral and mildly alkaline waters appeared suitable for the possible application of Zn-Al LDHs due to the amphoteric nature of aluminum hydroxide. Phosphate adsorption from the sludge filtrate by the LDHs followed pseudo-second-order kinetics, and the adsorption capacity at equilibrium was determined to be ∼50 mg P/g. Adsorption isotherms showed that phosphate uptake in this study was an endothermic process and had a good fit with a Langmuir-type model. The absorbed phosphate can be effectively desorbed (more than 80%) from LDHs particles by a 5 wt% NaOH solution. The regeneration rate of used LDHs was ∼60% after six cycles of adsorption-desorption-regeneration.

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Section: Adsorption Kineticsmentioning

confidence: 74%

Section: Adsorption Isothermmentioning

confidence: 99%

Phosphate adsorption from sewage sludge filtrate using zinc–aluminum layered double hydroxides

Cheng

Huang

Wang

et al. 2009

Journal of Hazardous Materials

207

View full text Add to dashboard Cite

show abstract

“…Furthermore, clay is known to effectively capture phosphorus via anion exchange. Additionally the average pH values of the influent and effluent from the Bold & Gold™ bio-filtration system tests are 6.92 and 7.74 respectively, which is in the effective pH range for phosphate adsorption by tire crumb [17].…”

Section: Soluble Reactive Phosphorusmentioning

confidence: 92%

Assessment of Biosorption Activated Media Under Roadside Swales for the Removal of Phosphorus from Stormwater

Hood

Chopra

Wanielista

2013

Water

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Stormwater runoff from highways is a source of pollution to surface water bodies and groundwater. Excess loadings of phosphorus in stormwater discharged to surface water bodies can result in eutrophication. Treatment of stormwater for phosphorus is necessary in order to sustain ecological and economical benefits related to aquatic resources. If phosphorus is removed, the water can be sustained for other uses, such as irrigation and industrial applications. The data presented in this paper is used to evaluate the treatment performance of a roadside biosorption activated media system with regards to the removal of total phosphorus and soluble reactive phosphorus from highway runoff. The evaluation also compares removal efficiencies and effluent concentrations using biosorption activated media (BAM) to that with sandy soil commonly found in the Florida area. The results presented in this paper indicate that BAM bio-filtration systems are a feasible treatment method for removing phosphorus from highway runoff. A discussion concerning the additional treatment and reuse of water by harvesting, as part of a Bio-filtration & Harvesting Swale System, is also presented in the paper.

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“…Based on the effect of pH and desorption results, Anirudhan et al (2006) and Namasivayan and Sangeetha (2004) concluded that ion exchange and chemisorption mechanisms could be important pathways for the removal of P by quaternized banana stem and ZnCl2 activated carbon, respectively. Tshabalala et al (2004) ions onto cationized milled wood residues.…”

Section: Co-existing Mechanismsmentioning

confidence: 99%

Agricultural By-Products for Phosphorous Removal and Recovery from Water and Wastewater: A Green Technology

Ngo

Guo

Nguyen

et al. 2016

Green Technologies for Sustainable Water Management

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Equilibrium and kinetic studies of adsorption of phosphate onto ZnCl2 activated coir pith carbon

Cited by 238 publications

References 16 publications

Phosphate adsorption from sewage sludge filtrate using zinc–aluminum layered double hydroxides

Phosphate adsorption from sewage sludge filtrate using zinc–aluminum layered double hydroxides

Assessment of Biosorption Activated Media Under Roadside Swales for the Removal of Phosphorus from Stormwater

Agricultural By-Products for Phosphorous Removal and Recovery from Water and Wastewater: A Green Technology

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