Simultaneous removal of ammonium and phosphate by zeolite synthesized from fly ash as influenced by salt treatment

Wu, Deyi; Zhang, Baohua; Li, Chunjie; Zhang, Zhenjia; Kong, Hainan

doi:10.1016/j.jcis.2006.09.011

Cited by 173 publications

(87 citation statements)

References 26 publications

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“…High pH shows that adsorption capability was decreased. This is contradictory to the trends noticed for the adsorption of ammonium ions by zeolites synthesized from fly ash and by coconuts shell activated carbon treated at 800˚C [5] [35]. This could be attributed to the competition between negative and positive ions as well as the addition of surfactant (ethanol) into the solution.…”

Section: Effect Of Phcontrasting

confidence: 68%

Removal of Methylene Blue, Rhodamine B and Ammonium Ion from Aqueous Solution by Adsorption onto Sintering Porous Materials Prepared from Coconut Husk Waste

Dabwan¹,

Nakane²,

Asri³

et al. 2015

OJINM

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The present work was done in order to develop and find out suitable conversion methods for coconut husk wastes into value-added products. It is well-known that coconuts husk waste is hydrophobic therefore ethanol with different doses was used as a surfactant to enhance the removal efficiency. Treated samples at different adsorbent amounts, sintering temperatures & sintering time, stirring time, pH, and solution temperatures for color removal of Methylene Blue (MB) & Rhodamine B (RhB) and ammonium concentration were evaluated by using UV-Visible Spectroscopy. At 300˚C, results showed complete removal for MB and more than 75% for RhB, whereas removal of ammonium ion reached around 52% when sintering product from husk waste was used. Further investigation was carried out for ammonium ion to understand the desorption kinetic behaviors and isotherm models. Kinetics indicated that desorption of ammonium ion followed pseudo-first order equation. Adsorption thermodynamic parameters such as ΔG, ΔH, and ΔS followed Van't Hoff plot for adsorption and found to be negative which indicated that the adsorption process for ammonium onto coconut husk was physical, spontaneous and exothermic.

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Section: Effect Of Phcontrasting

confidence: 68%

Removal of Methylene Blue, Rhodamine B and Ammonium Ion from Aqueous Solution by Adsorption onto Sintering Porous Materials Prepared from Coconut Husk Waste

Dabwan¹,

Nakane²,

Asri³

et al. 2015

OJINM

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show abstract

“…Adsorption capacity of adsorbent increased remarkably with increasing pH values up to 8, and then increase rate was lower with increasing pH over 8. It was observed for the adsorption of ammonium by zeolite synthesized from fly ash, sawdust and Posidonia oceanica fibers within the pH range 5.5-10.5 [5,6,22] and by composites of g-alumina/KAS gel within the pH range 5-10 [23]. However the optimum removal efficiency of ammonium by the most types of zeolite tested is achieved when operating at pH value of 6 and 7 [8,24].…”

Section: Influence Of Phmentioning

confidence: 94%

Çam Kozalak Tozunun Bi̇osorbent Olarak Kullanilrak Sudan Amonyumun Uzaklaştirilmasi

Demirak¹,

Keskin²,

Şahin³

et al. 2015

Mugla Journal of Science and Technology

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Pine cone, a popular agricultural waste, was investigated as a novel ammonium biosorbent in its raw and sodium hydroxide modified form. Surface modification of pine cone powder were carried out using sodium hydroxide solution of concentarions (0,05 and 0,1mg/L) was described by a pseudo-second-order model predicting a chemisorption process. In addition, the equilibrium data were well characterized by the Langmuir isotherm model that confirmed the mono-layer coverage. The surface properties of raw pine cone powder and its sodium hydroxide modified form were analyzed by Scanning Electron Microscopy with Energy Dispersive Spectroscopy (SEM-EDS) and powder X-ray diffraction (XRD). The chemical composition of pine cone powder before and after biosorption of ammonium is discussed in relation to the XRD and SEM-EDS results. The results showed that the surface of pine cone powder samples is modified by sodium hydroxide solution and the chemical composition of pine cone powder samples is changed after biosorption of ammonium. This from presents an interesting option for tertiary wastewater treatment (as a possible non-conventional biosorbent for the removal of ammonium

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“…In addition, iron-and aluminiumbased crystalline and amorphous phases can become positively charged and, through a ligand exchange mechanism, their adsorption capabilities increase at neutral to acidic equilibrium pH values in comparison to alkaline conditions (Parfitt, 1979;Geelhoed et al, 1997). As a result, this zeolite was proposed as a P absorbent from wastewater (Wu et al, 2006). In AP systems, where ammonium (NH4 + ) ions are continuously produced by fish and bacteria, the zeolite can adsorb these ions on its surface, and it can also act as substrate for nitrifying bacteria.…”

Section: Substrate Typesmentioning

confidence: 99%

Hydroponic systems and water management in aquaponics: a review

et al. 2017

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Aquaponics (AP), the integrated multi-trophic fish and plants production in quasi-closed recirculating system, is one of the newest sustainable food production systems. The hydroponic component of the AP directly influences water quality (in turn influencing fish growth and health), and water consumption (through evapotranspiration) of the entire system. In order to assess the role of the design and the management of the hydroponic component on the overall performance, and water consumption of the aquaponics, 122 papers published from 1979 to 2017 were reviewed. Although no unequivocal results were found, the nutrient film technique appears in several aspects less efficient than medium-based or floating raft hydroponics. The best system performance in terms of fish and plant growth, and the highest nutrient removal from water was achieved at water flow between 0.8 L min -1 and 8.0 L min -1 . Data on water consumption of aquaponics are scarce, and no correlation between the ratio of hydroponic unit surface/fish tank volume and the system water loss was found. However, daily water loss was positively correlated with the hydroponic surface/fish tank volume ratio if the same experimental conditions and/or systems were compared. The plant species grown in hydroponics influenced the daily water loss in aquaponics, whereas no effect was exerted by the water flow (reciprocating flood/drain cycle or constant flow) or type (medium-based, floating or nutrient film technique) of hydroponics.

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Simultaneous removal of ammonium and phosphate by zeolite synthesized from fly ash as influenced by salt treatment

Cited by 173 publications

References 26 publications

Removal of Methylene Blue, Rhodamine B and Ammonium Ion from Aqueous Solution by Adsorption onto Sintering Porous Materials Prepared from Coconut Husk Waste

Removal of Methylene Blue, Rhodamine B and Ammonium Ion from Aqueous Solution by Adsorption onto Sintering Porous Materials Prepared from Coconut Husk Waste

Çam Kozalak Tozunun Bi̇osorbent Olarak Kullanilrak Sudan Amonyumun Uzaklaştirilmasi

Hydroponic systems and water management in aquaponics: a review

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