Improving the ammonium ion uptake onto natural zeolite by using an integrated modification process

Zhu, Liang; Ni, Jinren

doi:10.1016/j.jhazmat.2008.11.002

Cited by 82 publications

(43 citation statements)

References 29 publications

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“…Instead, the Si/Al atomic ratio decreased with the increase in the concentration of NaOH and NaCl, particularly in NaOH modification; these results are in accord with previous report [13]. The mechanism of silica dissolution is shown in Scheme 2.…”

Section: Si/al Atomic Ratiosupporting

confidence: 91%

Preparation of Stellerite Loading Titanium Dioxide Photocatalyst and Its Catalytic Performance on Methyl Orange

Chen

Wang

et al. 2015

Journal of Nanomaterials

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TiO 2 /stellerite composite photocatalysts were prepared by dispersing TiO 2 onto the surface of HCl, NaOH, or NaCl treated stellerite using a sol-gel method. The materials were characterized by scanning electron microscopy (SEM), energy dispersive X-ray (EDX), Fourier transform infrared spectroscopy (FT-IR), BET surface area analysis, and X-ray diffraction (XRD). HCl and NaCl modification result in the promotion of the pore formation at the stellerite surfaces and induced the microscopic changes, while the surface morphology and structure of the stellerite were almost ruined by NaOH modification. Supported TiO 2 calcinated at 200 ∘ C presented anatase structure. The photocatalytic degradation activities of TiO 2 loaded HCl and NaCl modified stellerite were better than that of natural stellerite, accompanied with increasing specific surface area. On the contrary, NaOH modification induced the loss of photocatalytic ability of composite due to the generation of silicates.

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Section: Si/al Atomic Ratiosupporting

confidence: 91%

Preparation of Stellerite Loading Titanium Dioxide Photocatalyst and Its Catalytic Performance on Methyl Orange

Chen

Wang

et al. 2015

Journal of Nanomaterials

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“…The extent of porosity and rough surface of HMP was greater than that of MGMP. The improvement of porous structure and adsorption by salt treatment was reported by Liang and Ni [54]. As the number of channels/cavities increased, the surface area and heterogeneous nature of the materials increased in the following order: NP (2.34 m 2 g À1 ) < MGMP (41.63 m 2 g À1 ) < HMP (53.11 m 2 g À1 ).…”

Section: Sem Studymentioning

confidence: 55%

“…The remarkable improvement of the surface area in the modified pumice may be attributed to the removal of oxidisable and soluble impurities occupying the pores of the pumice which consequently results with more accessibility for adsorbate (fluoride) with larger surface area. The expanded pore volume and pore diameter of natural zeolites by salt treatment leading to increased surface area was reported by Liang and Ni [54]. The chemical composition of natural pumice is shown in Table 1.…”

Section: Characterization Of Np Mgmp and Hmpmentioning

confidence: 56%

Surface modification of pumice enhancing its fluoride adsorption capacity: An insight into kinetic and thermodynamic studies

Sepehr

Sivasankar

Zarrabi

et al. 2013

Chemical Engineering Journal

118

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“…Among these organic toxicants, phenol is the most common (Liang and Ni 2009). Phenol is very toxic, with a fixed low admissible level of 0.5 mg L −1 in water (Polat et al 2006;Girods et al 2009).…”

Section: Introductionmentioning

confidence: 99%

“…Phenol is very toxic, with a fixed low admissible level of 0.5 mg L −1 in water (Polat et al 2006;Girods et al 2009). Ammonium ion (NH 4 + ) is one of the important pollutants in municipal sewage and industrial wastewater because it can cause increased oxygen demand and eutrophication in rivers and lakes (Liang and Ni 2009). Therefore, the wastewater biological treatment requires the simultaneous removal of aromatic organic compounds and ammonium.…”

Section: Introductionmentioning

confidence: 99%

Simultaneous Removal of Phenol and Ammonium Using Serratia sp. LJ-1 Capable of Heterotrophic Nitrification-Aerobic Denitrification

Lü

Jin

et al. 2014

Water Air Soil Pollut

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The simultaneous removal of phenol and ammonium using heterotrophic nitrifying-denitrifying bacterium Serratia sp. LJ-1 was investigated. The maximum removal rates of ammonium nitrogen and phenol were 1.08±0.05 and 2.14±0.08 mg, respectively. The ammonium oxidation had much higher tolerance to phenol toxicity than that of the autotrophic nitrifying bacteria. The increase in phenol concentration led to an increase in ammonium oxidation rate under the phenol concentration of 600 mg L . Maximum rates of phenol biodegradation and total nitrogen removal in the treatments with nitrification metabolite (nitrate or nitrite) as the sole nitrogen source were more than 30 % lower than those of the treatment with ammonium as the sole nitrogen source. Ammonium was removed through nitrification and subsequent aerobic denitrification while phenol was biodegraded through the ortho-cleavage pathway and subsequently mineralized. Since phenol often coexists with nitrogen pollutants, these findings have significant environmental implications in terms of the simultaneous removal of these contaminants.

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Improving the ammonium ion uptake onto natural zeolite by using an integrated modification process

Cited by 82 publications

References 29 publications

Preparation of Stellerite Loading Titanium Dioxide Photocatalyst and Its Catalytic Performance on Methyl Orange

Preparation of Stellerite Loading Titanium Dioxide Photocatalyst and Its Catalytic Performance on Methyl Orange

Surface modification of pumice enhancing its fluoride adsorption capacity: An insight into kinetic and thermodynamic studies

Simultaneous Removal of Phenol and Ammonium Using Serratia sp. LJ-1 Capable of Heterotrophic Nitrification-Aerobic Denitrification

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