Adsorption isotherms and kinetics of vanadium by shale and coal waste

Kajjumba, George William; Aydın, Serdar; Güneysu, Sinan

doi:10.1177/0263617417733586

Cited by 41 publications

(15 citation statements)

References 46 publications

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“…This is because at high adsorbent mass, the active sites for V uptake form solution increases (Mojiri et al, 2017). However, metal ion uptake decreases from 23.08 to 3.46 mg/g, with an increase in the dose from 0.025 to 0.3 g. Similar results were reported on the adsorption of V using adsorbent derived from agricultural waste (Kajjumba et al, 2018). Also, the results reveal that at higher sorbent dosage beyond 0.1 g, a slight increase in adsorption efficiency was attained.…”

Section: Effect Of Adsorbent Masssupporting

confidence: 83%

Functionalized Sawdust-Derived Cellulose Nanocrystalline Adsorbent for Efficient Removal of Vanadium From Aqueous Solution

Zulu

Oyewo

Sitholé

et al. 2020

Front. Environ. Sci.

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Water quality degradation due to noxious heavy metals has become a serious concern because of its impact on human health and the ecosystem. In this study, cellulose nanocrystal (CNC) derived from sawdust as a green renewable and sustainable resource was functionalized and used as adsorption media to remove pentavalent vanadium (V) from aqueous solution. The physicochemical properties of the adsorbent were studied using various characterization techniques such as Fourier transform infrared (FTIR) spectroscopy, scanning electron microscopy (SEM), and X-ray diffraction (XRD). The performance of the functionalized CNC adsorbent was explored as a function of solution pH, temperature, adsorbent mass, time, and initial concentration in batch adsorption. XRD results confirmed the crystalline nature of the CNC, which was more pronounced upon modification. The SEM micrograph revealed rough surface and high porosity, which suggested that the CNC possessed prerequisite properties of a good adsorbent. From the FTIR spectra results, the interaction between anionic vanadium species and functionalized CNC was confirmed by the reduction in wavelength of carboxylic groups (-COOH) of the CNC. Meanwhile, from the adsorption results, V removal efficiency was found to be affected by solution pH, temperature, adsorbent mass, and initial concentration. The Langmuir maximum adsorption capacity was 37.9-47.2 mg/g in the temperature range studied. In evaluating the reusability of the CNC through adsorption-desorption studies, results confirmed that the functionalized CNC could be used more than once with about 20% reduction in adsorption of V in each adsorption-desorption cycle. So far, there are indications that modified CNC may be an alternative adsorption media for V.

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Section: Effect Of Adsorbent Masssupporting

confidence: 83%

Functionalized Sawdust-Derived Cellulose Nanocrystalline Adsorbent for Efficient Removal of Vanadium From Aqueous Solution

Zulu

Oyewo

Sitholé

et al. 2020

Front. Environ. Sci.

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“…Water is a cardinal pillar of life; without it, life is impossible (Kajjumba et al 2018 , 2019 ). The survival duration of coronavirus ranges from 2 h to 9 days, depending on the prevailing conditions (World Health Organisation 2020 ).…”

Section: Municipal Wastewater and Wastementioning

confidence: 99%

Environmental impact of coronavirus (COVID-19) from Turkish perceptive

Aydın

Nakiyingi

Esmen

et al. 2020

Environ Dev Sustain

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COVID-19 was not taken seriously by many of us until the wave hit our countries and impacted daily life routines and travel plans, similar to our responses to climate change. COVID-19 led to a decrease of anthropogenic activities in Turkey, largely due to lockdown. Changes in the air quality index (AQI) were assessed before and during coronavirus. In this study, the authors investigated the changes of AQI for 2.5 µm particulate matter (PM 2.5), a primary air pollutant, as well as ozone, a secondary air pollutant, in Turkey during December 2019, April 2020, and May 2020. Overall, the PM 2.5 index improved by 34.5% by the end of April 2020. However, the ozone index increased from 16.8 to 28.8 by the end of April. The increase in ozone is attributed to the reduction of PM levels, which increased sunlight penetration. Before COVID-19, the AQI for Turkey was categorized as unhealthy for sensitive groups (PM 2.5 = 103); however, during the pandemic, AQI fell to lower boundaries of the moderate category by May 2020 (PM 2.5 = 56.9). Changes in municipal wastewater were also assessed. Municipal wastewater quality and hospital waste generation did not change during the pandemic in Turkey. Therefore, we should not expect COVID-19 risks in treatment plant effluents. This study gives confidence to regulators that when strict measures are implemented, air quality can improve.

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“…Treatment of water was estimated to follow IP model [10,11]. However, in many studies film diffusion is the limiting step during the initial stages of the process followed by IP diffusion when particles reach the surface of the adsorbent [1,12,13]. There is barely any non-linear form of IP model.…”

Section: Boyd Modelmentioning

confidence: 99%

Modelling of Adsorption Kinetic Processes—Errors, Theory and Application

Kajjumba¹,

Emik²,

Öngen³

et al. 2019

Advanced Sorption Process Applications

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142

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Adsorption has become a competitive method in the field of wastewater and air treatment. Adsorption kinetics is one of the main factors that must be understood before the applicability of any adsorbent. In every adsorption process, linear or nonlinear analysis of the kinetics is applied. The goodness of fit index (coefficient of correlation or sum of squares) is applied to access the best model. The usage of linear or non-linear from of the adsorption kinetics has an impact on the distribution of error function. Almost in every adsorption study, linear forms have been used to conclude the best kinetic model that influence the adsorption mechanismwhich might be an error. Therefore, this review highlights the mistakes in the usage of linear and non-linear models. The applicability of the adsorption kinetics in wastewater treatment is also illuminated.

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Adsorption isotherms and kinetics of vanadium by shale and coal waste

Cited by 41 publications

References 46 publications

Functionalized Sawdust-Derived Cellulose Nanocrystalline Adsorbent for Efficient Removal of Vanadium From Aqueous Solution

Functionalized Sawdust-Derived Cellulose Nanocrystalline Adsorbent for Efficient Removal of Vanadium From Aqueous Solution

Environmental impact of coronavirus (COVID-19) from Turkish perceptive

Modelling of Adsorption Kinetic Processes—Errors, Theory and Application

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