Coating magnetic biochar with humic acid for high efficient removal of fluoroquinolone antibiotics in water

“…It depicts the state of the absorbent's surface when the overall charge on it is zero. (Zhao et al, 2019). It verifies how easily a material can uptake potential injurious ions.…”

Section: Point Of Zero Chargementioning

confidence: 96%

Amine-grafted Walnut Shell for Efficient Removal Phosphate and Nitrate from Aqueous Solution

Dovi¹,

Aryee²,

Li³

et al. 2021

Preprint

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The presence of emerging pollutants such as PO43− and NO3− in water bodies has attracted worldwide concern about their severe effects on water bodies and the health of humankind in general. Therefore, to preserve the health of humankind and environmental safety, it is of the essence that industrial effluents are treated before they are discharged into water bodies. To accomplish this, the walnut shell was functionalized (ACWNS) with amine for effective removal of PO43− and NO3−. Characterization studies of ACWNS were conducted using FTIR, XRD, XPS and BET techniques. Removal of both ions was enhanced at lower temperature (293 K). The maximum uptake capacity of phosphate and nitrate, at 293 K, was 82.2 and 35.7 mg g− 1, respectively. The primary mechanism by which these ions were uptaken onto ACWNS could be electrostatic interactions and hydrogen bonding.Pseudo-second-order kinetics fitted the PO43̶ and NO3− adsorption, while Freundlich and Langmuir models best fitted the PO43̶ and NO3̶ adsorption, respectively. Furthermore, in the binary system, the uptake capacity of phosphate decreased by 14.4% while nitrate witnessed a reduction in its uptake capacity by 10.4 %. So ACWNS has a higher attraction towards both ions and this could be attributed to the existence of a variety of active areas on ACWNS that exhibit a degree of specificity for the individual anions. Results obtained from real water samples analysis confirmed ACWNS as highly efficient to be utilized for practical remediation processes.

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“…Another type of antibiotics that represents a hidden danger to human health is the fluoroquinolones (FQs). Enrofloxacin (ENR), norfloxacin (NOR), and ciprofloxacin (CIP) were employed as FQs adsorbates to study the adsorp-tion properties of a humic acid-magnetic BC [30]. These authors prepared a magnetic BC from potato stems and leaves, which were coated with humic acid (HA), see Figure 8.…”

Section: Use Of Magnetic Adsorbents For Water Pollutant(s) Removalmentioning

confidence: 99%

Engineered Magnetic Carbon-Based Adsorbents for the Removal of Water Priority Pollutants: An Overview

Reynel-Ávila

Camacho-Aguilar

Bonilla-Petriciolet

et al. 2021

Adsorption Science & Technology

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This review covers the preparation, characterization, and application of magnetic adsorbents obtained from carbon-based sources and their application in the adsorption of both inorganic and organic pollutants from water. Different preparation routes to obtain magnetic adsorbents from activated carbon, biochar, hydrochar, graphene, carbon dots, carbon nanotubes, and carbon nanocages, including the magnetic phase incorporated on the solid surface, are described and discussed. The performance of these adsorbents is analyzed for the removal of fluoride, arsenic, heavy metals, dyes, pesticides, pharmaceuticals, and other emerging and relevant water pollutants. Properties of these adsorbents and the corresponding adsorption mechanisms have been included in this review. Overall, this type of magnetic adsorbents offers an alternative for facing the operational problems associated to adsorption process in water treatment. However, some gaps have been identified in the proper physicochemical characterization of these adsorbents, the development of green and low-cost preparation methods for their industrial production and commercialization, the regeneration and final disposal of spent adsorbents, and their application in the multicomponent adsorption of water pollutants.

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Coating magnetic biochar with humic acid for high efficient removal of fluoroquinolone antibiotics in water

Cited by 126 publications

References 72 publications

Removal of abamectin and conventional pollutants in vertical flow constructed wetlands with Fe-modified biochar

Removal of abamectin and conventional pollutants in vertical flow constructed wetlands with Fe-modified biochar

Amine-grafted Walnut Shell for Efficient Removal Phosphate and Nitrate from Aqueous Solution

Engineered Magnetic Carbon-Based Adsorbents for the Removal of Water Priority Pollutants: An Overview

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