Conversion of oil shale ash into zeolite for cadmium and lead removal from wastewater

Shawabkeh, Reyad; Al-Harahsheh, Adnan; Hami, M. L.; Khlaifat, Abdelaziz

doi:10.1016/j.fuel.2003.10.009

Cited by 144 publications

(51 citation statements)

References 16 publications

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“…The removal of arsenic, from drinking water was also reported (Goswami and Das 2000). FA was converted to zeolites by also for the removal of metal ions, radiocesium (Mimura et al 2001), Lead and Cadmium (Shawabkeh et al 2004). Surface modified zeolite from FA was employed for the adsorption of phenol and o-chlorophenol (Kamble et al 2008) and thiophene and benzothiophene (Ngamcharussrivichai et al 2008).…”

Section: Synthesis Of Zeolitementioning

confidence: 99%

Fly Ash Pollutants, Treatment and Recycling

Gianoncelli

Zacco

Struis

et al. 2013

Environmental Chemistry for a Sustainable World

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Section: Synthesis Of Zeolitementioning

confidence: 99%

Fly Ash Pollutants, Treatment and Recycling

Gianoncelli

Zacco

Struis

et al. 2013

Environmental Chemistry for a Sustainable World

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“…However, minor peaks were observed at 2θ = 32 and 41.5 zeolite X and mullite, respectively. These minerals might be formed after washing and neutralizing the produced carbon with sodium hydroxide which could react with the remaining aluminosilicates in the yielding zeolite according to the following equation (Shawabkeh et al, 2004):…”

Section: Characterization Of the Produced Carbonmentioning

confidence: 99%

Production and characterization of granular activated carbon from activated sludge

Al-Qodah

Shawabkah

2009

Braz. J. Chem. Eng.

186

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-In this study, activated sludge was used as a precursor to prepare activated carbon using sulfuric acid as a chemical activation agent. The effect of preparation conditions on the produced activated carbon characteristics as an adsorbent was investigated. The results indicate that the produced activated carbon has a highly porous structure and a specific surface area of 580 m 2 /g. The FT-IR analysis depicts the presence of a variety of functional groups which explain its improved adsorption behavior against pesticides. The XRD analysis reveals that the produced activated carbon has low content of inorganic constituents compared with the precursor. The adsorption isotherm data were fitted to three adsorption isotherm models and found to closely fit the BET model with R 2 equal 0.948 at pH 3, indicating a multilayer of pesticide adsorption. The maximum loading capacity of the produced activated carbon was 110 mg pesticides/g adsorbent and was obtained at this pH value. This maximum loading was found experimentally to steeply decrease as the solution pH increases. The obtained results show that activated sludge is a promising low cost precursor for the production of activated carbon.

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“…Most of the interactions between the ash and sodium hydroxide solution at room temperature (25°C) are expected to adsorb water and alkali ions, according to the following reaction (Shawabkeh et al 2004):…”

Section: The Substratesmentioning

confidence: 99%

Concurrent dyes adsorption and photo-degradation on fly ash based substrates

et al. 2010

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Most of the dyes are organic compounds, with different degree of polarization and different groups with various steric effects, making their complete biodegradation slow or even impossible. Adsorption on fly ash and fly ash based substrates represents a possible alternative for simultaneous removal of dyes and heavy metals form wastewaters resulted in the textile industry. Adsorption (under visible light) and adsorption and photodegradation (under UV irradiation) studies were done on Methylene blue solutions and on their mixtures with heavy metals (copper and cadmium), in systems using fly ash as single substrate, or mixed with a wide band gap semiconductor (TiO 2 ). The titanium oxides and hematite content in fly ash proved to be responsible for photodegradation processes even in the absence of the TiO 2 powder, confirming that modified fly ash is a viable candidate in developing up scalable processes for advanced wastewater treatment. The kinetic and thermodynamic studies allow to calculate the parameters and to describe the complex mechanisms, involving competitive adsorption.

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Conversion of oil shale ash into zeolite for cadmium and lead removal from wastewater

Cited by 144 publications

References 16 publications

Fly Ash Pollutants, Treatment and Recycling

Fly Ash Pollutants, Treatment and Recycling

Production and characterization of granular activated carbon from activated sludge

Concurrent dyes adsorption and photo-degradation on fly ash based substrates

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