Efficiency of Coal Fly Ash Derived Zeolite in Removing Ammoniacal Nitrogen from Freshwater Pearl Farming Wastewater
SSRN, ISSN: 1556-5068
2024
- 65Usage
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Example: if you select the 1-year option for an article published in 2019 and a metric category shows 90%, that means that the article or review is performing better than 90% of the other articles/reviews published in that journal in 2019. If you select the 3-year option for the same article published in 2019 and the metric category shows 90%, that means that the article or review is performing better than 90% of the other articles/reviews published in that journal in 2019, 2018 and 2017.
Citation Benchmarking is provided by Scopus and SciVal and is different from the metrics context provided by PlumX Metrics.
Article Description
Given that freshwater pearl farming has emerged as a pillar industry for numerous local governments in China, overfeeding of pearl oysters has resulted in wastewater with high ammoniacal nitrogen (NH3-N) content, posing a serious threat to the local environment. This study utilized coal fly ash (CFA), an industrial waste, to prepare zeolite, which demonstrated high NH3-N removal efficiency from freshwater pearl farming wastewater. The CFA-derived zeolite was prepared using pickling pretreatment and hydrothermal synthesis methods. The resultant A-type zeolite featured cubic and spherical crystal microstructures, with a specific surface area of 17.5 m2/g, an average pore size of approximately 10.7 nm, and a pore volume of about 0.03 cm3/g. Additionally, its decomposition temperature exceeds 400 °C. The adsorption process of NH3-N was thoroughly investigated. Adsorption kinetics and isotherm analyses indicated that the pseudo-first-order and Dubinin-Radushkevich models more accurately represent the kinetics and adsorption behavior of CFA-derived zeolite in the NH3-N adsorption process. When applied to raw freshwater pearl farming wastewater, the zeolite achieved a removal efficiency of 74% at a dosage of 70 g/L. This strategy not only addresses the pollution problem associated with coal fly ash but also benefits freshwater pearl farming, achieving a "win-win" outcome.
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