Magnetic SN-functionalized diatomite for effective removals of phenols

Yu, Yichang; Hu, Zhangjun; Wang, Yue; Gao, Hong‐Wen

doi:10.1016/j.minpro.2017.02.001

Cited by 25 publications

(7 citation statements)

References 30 publications

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“…Phenolic compounds are pollutants presenting acute toxicity, low biodegradability, with high accumulation and persistence in the environment. In this regard, the U.S. Environmental Protection Agency has categorized such chemicals as priority toxic pollutants (Yu et al 2017;Víctor-Ortega et al 2016;Rayati and Nejabat 2017;Soni et al 2017). Several methods including adsorption, membrane separation, and advanced oxidation processes have been reported for removing phenolic pollutants (Yu et al 2017;Chagas et al 2015;Savic et al 2014).…”

Section: Introductionmentioning

confidence: 99%

“…In this regard, the U.S. Environmental Protection Agency has categorized such chemicals as priority toxic pollutants (Yu et al 2017;Víctor-Ortega et al 2016;Rayati and Nejabat 2017;Soni et al 2017). Several methods including adsorption, membrane separation, and advanced oxidation processes have been reported for removing phenolic pollutants (Yu et al 2017;Chagas et al 2015;Savic et al 2014). These methods suffer from drawbacks such as high cost, low efficiency, sensitivity to concentration, and formation of hazardous by-products (Chiong et al 2016;Lloret et al 2012;Singh et al 2017;Alneyadi and Ashraf 2016;Elsayed et al 2017).…”

Section: Introductionmentioning

confidence: 99%

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Biotransformation of phenol in synthetic wastewater using the functionalized magnetic nano-biocatalyst particles carrying tyrosinase

et al. 2018

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Low conversion efficiency and long-processing time are some of the major problems associated with the use of biocatalysts in industrial processes. In this study, modified magnetic iron oxide nanoparticles bearing tyrosinase (tyrosinase-MNPs) were employed as a magnetic nano-biocatalyst to treat phenol-containing wastewater. Different factors affecting the phenol removal efficiency of the fabricated nano-biocatalyst such as catalyst dosage, pH, temperature, initial phenol concentration, and reusability were investigated. The results proved that the precise dosage of nano-biocatalyst was able to degrade phenol at the wide range of pHs and temperatures. The immobilized tyrosinase showed proper phenol degradation more than 70%, where the substrate with a high concentration of 2500 mg/L was subjected to phenol removal. The nano-biocatalyst was highly efficient and reusable, since it displayed phenol degradation yields of 100% after the third reuse cycle and about 58% after the seventh cycle. Moreover, the immobilized tyrosinase was able to degrade phenol dissolved in real water samples up to 78% after incubation for 60 min. It was also reusable at least seven cycles in the real water sample. The results proved the effectiveness and applicability of the fabricated nano-biocatalyst to treat phenol-containing wastewaters in a shorter time and higher efficiency even at high phenol concentration. The developed nano-biocatalyst can be promising for the micropollutants removal and an alternative for the catalysts used in traditional treatment processes.

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Biotransformation of phenol in synthetic wastewater using the functionalized magnetic nano-biocatalyst particles carrying tyrosinase

et al. 2018

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“…For that reason, the adsorption capacities of some adsorbents reported in the literature for phenol adsorption were determined and listed in table 2. As compared with the reported data in table 2 [30][31][32][33][34][35][36][37][38][39][40] the maximum adsorption capacity of PNAM for phenol is much higher than that of the adsorbents described in the literature. This suggests its potential use in actually removing phenol from wastewater.…”

Section: Adsorption Effect Of Phenolmentioning

confidence: 71%

A simple method to prepare carbon-based mesoporous materials by coal gasification of fine slag and its application in phenol adsorption

Guo,

Zhang,

Dai

et al. 2023

Mater. Res. Express

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Phenol is a common organic pollutant that is difficult to degrade and widely exists in all kinds of wastewater. In this study, an economical and environmentally friendly alternative process for phenol-containing wastewater has been developed using porous nano-adsorption material (PNAM) prepared from coal gasification fine slag. The morphology, crystal structure, surface functional groups, gap structure, and specific surface area of PNAM were characterized by SEM, XRD, FT-IR, and BET. The effects of adsorbent dosage, temperature, pH, and reaction time on adsorption were further investigated. In addition, the adsorption kinetics, thermodynamics, and adsorption mechanism were explored. The results show that the surface area of PNAM is high, up to 602 m2/g, and the pore volume is 0.507 cm3/g. Adsorption processes mainly occur in mesopores between 2 and 5 nm, including physical and chemical adsorption, and here chemical adsorption plays a significant role. The adsorption rate of phenol in a 1000 mg/L simulated phenol solution by PNAM reaches 96.14%, while the unit adsorption capacity is 32.045 mg/g. As a result, it is expected that employing coal gasification fine slag to prepare adsorption materials for phenol-containing wastewater treatment may be an economically feasible and environmentally sustainable strategy.

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“…The pore size is appropriate, and the CNTs synthesized on the surface do not affect the pore structure of the pore. There are a large number of silicon hydroxyl groups which can form a good connection with polar organic compounds, making up for the defects of poor adsorption capacity of CNTs for nonpolar organic substances on the surface of diatomite, leading scientists to use diatomite to purify phenolic organics in wastewater. − Murathan et al studied the adsorption performance of natural diatomite on the heavy metal ions Pb 2+ , Zn 2+ , and Cu 2+ using fixed bed technology. Liao et al used diatomite impregnated with polyethylene imine to adsorb phenolic organic compounds.…”

Section: Introductionmentioning

confidence: 99%

In Situ Synthesis of Diatomite–Carbon Nanotube Composite Adsorbent and Its Adsorption Characteristics for Phenolic Compounds

Wang

Yang

et al. 2018

J. Chem. Eng. Data

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Carbon nanotubes (CNTs) were synthesized on a Ni catalyst−diatomite substrate using a chemical vapor deposition (CVD) method. By controlling the synthesis conditions, we explored the influence of synthesis time and temperature on the synthesis of CNTs. The carbon yield and microstructure of the resulting CNTs were investigated by thermogravity (TG), scanning electron microscopy (SEM), transmission electron microscopy (TEM), and Raman spectroscopy analysis. Then, two kinds of purification methods, annealing and acid treatment, were used on the synthesis products, diatomite−CNT, and can effectively increase the specific surface area of the product. The adsorption behaviors of diatomite−CNT composite adsorbents for phenolic compounds have been investigated. The adsorption experiments showed that the adsorption process reached equilibrium quickly, while the adsorption kinetics followed the pseudo-second-order model and the adsorption isotherm followed the Langmuir model well, respectively. The thermodynamics parameters indicated that the adsorption behavior is an exothermic process performing spontaneously. The diatomite−CNT adsorbent will perform well for removal of phenolic compounds from wastewater.

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Magnetic SN-functionalized diatomite for effective removals of phenols

Cited by 25 publications

References 30 publications

Biotransformation of phenol in synthetic wastewater using the functionalized magnetic nano-biocatalyst particles carrying tyrosinase

Biotransformation of phenol in synthetic wastewater using the functionalized magnetic nano-biocatalyst particles carrying tyrosinase

A simple method to prepare carbon-based mesoporous materials by coal gasification of fine slag and its application in phenol adsorption

In Situ Synthesis of Diatomite–Carbon Nanotube Composite Adsorbent and Its Adsorption Characteristics for Phenolic Compounds

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