Adsorption characteristics of ammonium ion by zeolite 13X

Zheng, Hong; Liang, Han; Hongwen, MA; Zheng, Yan; Zhang, Hongmei; Liu, Donghong; Liang, Shuai

doi:10.1016/j.jhazmat.2008.01.115

Cited by 166 publications

(88 citation statements)

References 19 publications

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“…A partir dos resultados obtidos, calculou-se conforme Zheng et al (2008) a capacidade máxima da coluna -q max (mg) -, a capacidade no equilíbrio -q exp (mg.g -1 ) -que corresponde à massa de N-NH 4 + adsorvida por unidade de massa seca de adsorvente, a quantidade total de N-NH 4 + que passou pela coluna -W (mg) -e a porcentagem de remoção para os diferentes ensaios -Y (%). Os dados foram modelados através da equação de Thomas, a qual é amplamente utilizada para prever a troca iônica heterogênea em fluxo (ZHENG et al, 2008) e é aplicável a sistemas que apresentam cinética de adsorção-dessorção descritas por Langmuir e taxa de remoção do adsorvato seguindo a uma reação cinética de segunda ordem (ROZADA et al, 2007).…”

Section: Remoção De Amônia De Efluentes Reaisunclassified

“…Os dados foram modelados através da equação de Thomas, a qual é amplamente utilizada para prever a troca iônica heterogênea em fluxo (ZHENG et al, 2008) e é aplicável a sistemas que apresentam cinética de adsorção-dessorção descritas por Langmuir e taxa de remoção do adsorvato seguindo a uma reação cinética de segunda ordem (ROZADA et al, 2007). Estudos anteriores, conduzidos em batelada, demonstraram que o sistema avaliado no presente trabalho cumpre os requisitos supracitados (HIGARASHI et al, 2008).…”

Section: Remoção De Amônia De Efluentes Reaisunclassified

“…Embora o método dos mínimos quadrados não lineares seja considerado mais preciso do que o método linear, quando aplicados à modelagem dos dados de colunas de adsorção (HAN et al, 2007), alguns trabalhos recentes continuam empregando a análise linear, demonstrando que o mesmo também pode descrever adequadamente a adsorção de amônia em zeólitas (ZHENG et al, 2008). Assim, tanto o método linear como não linear foram testados no presente estudo para fins comparativos.…”

Section: Remoção De Amônia De Efluentes Reaisunclassified

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Utilização De Colunas De Leito Fixo Com Adsorventes Naturais Para a Remoção De Amônia De Efluentes Da Suinocultura

Higarashi

2012

RHE

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RESUMOO presente trabalho avaliou a eficiência de uma coluna de leito fixo preenchida com zeólita natural como uma opção de tratamento terciário para a remoção de amônia de efluentes suinícolas. Os experimentos foram conduzidos utilizando efluentes reais, previamente tratados em uma planta comercial através de processos biológicos e físico-químicos. Os resultados demonstraram que, nas condições experimentais avaliadas, a taxa de fluxo volumétrica de 4,7 L.h -1 apresentou o melhor desempenho e a zeólita pode ser regenerada e reutilizada, embora ocorram perdas de 4-5% da sua capacidade de remoção a cada regeneração. Palavras-chave: Coluna de leito fixo. Zeólita natural. Efluente suinícola. Modelagem. ABSTRACTThis work evaluated the efficiency of fixed-bed column filled with natural zeolite, as a tertiary treatment option to remove ammonium from swine effluent. Experiments were carried out with real swine wastewater, previously treated in a commercial treatment plant by biological and physicalchemical processes. Results have shown that under these experimental conditions, volumetric flow rate of 4.7 L.h -1 presented the better performance and zeolite can be regenerated and reused although after each regeneration, decreases of 4-5% on removal capacity were observed.

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Section: Remoção De Amônia De Efluentes Reaisunclassified

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Utilização De Colunas De Leito Fixo Com Adsorventes Naturais Para a Remoção De Amônia De Efluentes Da Suinocultura

Higarashi

2012

RHE

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“…Ammonium often present in different types of waters and wastewater, can end up in lakes, rivers and drinking water reservoirs with effluent discharges. Higher concentration of ammonium will cause a sharp decrease of dissolved oxygen and obvious toxicity in aquatic organisms [4,5,6]. For those instances, ammonia removal from the polluted waters has become necessary in order to maintain proper water quality for the environmental problems.…”

Section: Introductionmentioning

confidence: 99%

“…For those instances, ammonia removal from the polluted waters has become necessary in order to maintain proper water quality for the environmental problems. Different physical, chemical and biological methods such as adsorption, chemical precipitation, membrane filtration, reverse osmosis, ion exchange, air stripping, breakpoint chlorination and biological nitrification and denitrification were used for removal of ammonia from polluted waters [4,5,6]. Several authors have reported the adsorption of ammonia from polluted waters on activated carbon and zeolite [7,8,9]; however, the high cost of activated carbon and the low abundance of zeolite in many countries, as well as the high costs of regeneration processes by chemical and thermal procedures, are a problem [6].…”

Section: Introductionmentioning

confidence: 99%

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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Aqueous nitrate removal by D417 resin: thermodynamic, kinetic and response surface methodology studies

Wang

et al. 2011

Asia-Pacific J Chem Eng

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In this study, D417 resin was characterized using scanning electron microscopy, Fourier transform infrared spectrometry and thermogravimetric analysis (TGA). Batchwise experiments were carried out to evaluate the thermodynamic and kinetic behaviors of the aqueous nitrate adsorption onto D417 resin. Response surface methodology (RSM) with Box–Behnken design (BBD) was employed to analyze the competition disturbance and matrix effects in terms of pH, organic matter concentration, contact time (CT) and salinity. Test results revealed that the resin was composed of the quaternary ammonium functional group and exhibited a considerable adsorption capacity of 23.46 to 22.81 mg·g−1 at the temperature ranging from 293.15 to 313.15 K. Mean free energy of adsorption calculated from the Dubinin–Radushkevich model showed that the adsorption was realized through ion‐exchange pathway. Gibbs free energy change, enthalpy change and entropy change illustrated that the aqueous nitrate sorption was feasible and spontaneous. It was also found that the pseudo‐second‐order model could well describe the adsorption kinetics, and the intraparticle diffusion was the main rate‐limiting step. RSM with BBD showed that CT and salinity had significant effects on aqueous nitrate adsorption, whereas the impacts of pH and dissolved organic matter were negligible. © 2011 Curtin University of Technology and John Wiley & Sons, Ltd.

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Adsorption characteristics of ammonium ion by zeolite 13X

Cited by 166 publications

References 19 publications

Utilização De Colunas De Leito Fixo Com Adsorventes Naturais Para a Remoção De Amônia De Efluentes Da Suinocultura

Utilização De Colunas De Leito Fixo Com Adsorventes Naturais Para a Remoção De Amônia De Efluentes Da Suinocultura

Çam Kozalak Tozunun Bi̇osorbent Olarak Kullanilrak Sudan Amonyumun Uzaklaştirilmasi

Aqueous nitrate removal by D417 resin: thermodynamic, kinetic and response surface methodology studies

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