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      • KCI등재

        Recent advances on the adsorption of herbicides and pesticides from polluted waters: Performance evaluation via physical attributes

        Joshua O. Ighalo,Adewale George Adeniyi,Adedeji A. Adelodun 한국공업화학회 2021 Journal of Industrial and Engineering Chemistry Vol.93 No.-

        Due to the need to ameliorate the incessant presence of herbicides and pesticides (H & P) in our waters,we appraised the recent advances in using adsorption technology. Of the numerous adsorbents,montmorillonite and activated carbon (AC) cloth showed the highest adsorption capacity (q) of 1067 and421.6 mg/g for 2,4-D herbicide and aldicarb, respectively. However, atrazine and aldrin (the mostresearched H & P, respectively) were best removed using eucalyptus bark-derived biosorbent (936.1 mg/g) and acid-treated patellidae shells (208.3 mg/g), respectively. We carried out further investigation intotwo newly derived adsorption attributes (effective surface area (eSBET) and preferential adsorption (qp). The eSBET correlates more strongly with q than the conventional specific surface area (SBET) becausesurface chemistry influences the former. Likewise, qp is a more reliable attribute than q because qpconsiders the adsorbent's chemical properties and adsorbate’s solubility. The correlation between eSBETand qp was strongest for 2,4-D (95%) and AC (62.25%). Future research could use spent heavy metaladsorbents and photo-assisted adsorption to improve the removal of competitive adsorptives (H & P). Conclusively, adsorption is excellent for mitigating H & P pollution, and the novel adsorption attributesprovided here would aid more liable performance optimization.

      • KCI등재

        Adsorption of ciprofloxacin from water: A comprehensive review

        Chinenye Adaobi Igwegbe,Stephen N. Oba,Chukwunonso O. Aniagor,Adewale George Adeniyi,Joshua O. Ighalo 한국공업화학회 2021 Journal of Industrial and Engineering Chemistry Vol.93 No.-

        In this paper, the adsorption of Ciprofloxacin (CIP) from water in studies over the last decade wasreviewed. The purpose of this review is to analyse the vast body of literature on the subject, identify keyempiricalfindings on specific investigation domains, establish knowledge gaps and grey areas that couldserve as a foundation for other investigations by researchers and predict future perspectives in theresearch area. The highest reported adsorption capacity for CIP was 1564 mg/g for magnetic N-dopedporous carbon. The major mechanisms of CIP uptake are electrostatic interactions, p-p interactions, Hbonds,hydrophobic interactions and pore diffusion. CIP uptake was best-fit to either the Langmuir andFreundlich isotherm and the pseudo-second-order kinetic model. For most adsorbent types, reusabilityof up to 4 cycles could be achieved with good retention of uptake capacity. The review further showedthat CIP uptake in adsorption columns was majorly bestfitted to the Thomas and Yoon-Nelson models. Incompetitive adsorption scenarios, the presence of other pharmaceuticals usually decreases the uptake ofCIP. Looking to the future, studies on novel hybrid processes, adsorbent modification, compositeadsorbent development, neural network modelling, molecular simulations and used adsorbent disposaltechniques are likely to increase for CIP adsorption.

      • KCI등재

        Zeolitic Imidazolate Frameworks (ZIFs) for aqueous phase adsorption – A review

        Joshua O. Ighalo,Selvasembian Rangabhashiyam,Comfort Abidemi Adeyanju,Samuel Ogunniyi,Adewale George Adeniyi,Chinenye Adaobi Igwegbe 한국공업화학회 2022 Journal of Industrial and Engineering Chemistry Vol.105 No.-

        Zeolitic Imidazolate Frameworks (ZIFs) represents a subclass of the metal-organic frameworks (MOFs),composed mainly of tetrahedrally coordinated transition metals. The aim of this review was to evaluatethe experimental findings on the adsorption of different aqueous pollutants using ZIFs. ZIF adsorptionmechanism was electrostatic attraction, p-p interaction and complexation though others were observedbased on pollutant type and nature of the solution chemistry. Thermodynamic modelling revealed thatZIF adsorption is usually spontaneous and endothermic. The adsorbent can be re-used for 3–4 cycles with>70% retention of uptake performance. NaOH, methanol and ethanol were observed to be the more suitableand effective eluents for desorption of adsorbate from ZIF. The nature of the adsorbate and the typeof uptake mechanism are the two key considerations in competitive adsorption systems. When theuptake mechanism of the main adsorbate species is different from that of the competing species, thenthe adsorption process is unaffected. Investigations on adsorbent disposal, targeted modification, functionalisation,emerging contaminants removal, column adsorption studies and molecular modellingwould be needed to fill in gaps in knowledge in ZIF related studies.

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