Adsorption of Cr (VI) on lignocellulosic wastes adsorbents: an overview and further perspective

Bachmann, Suyanne Angie Lunelli; Dávila, Ivone Vanessa Jurado; Calvete, Tatiana; Féris, Liliana Amaral

doi:10.1007/s13762-022-03928-z

Cited by 9 publications

(4 citation statements)

References 204 publications

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“…Similarly, Bayuo et al ( 2019) observed that the maximum chromium adsorption on ground nut shell was 5.56 mg g −1 [42]. Recently, Bachmann et al ( 2022) reported an adsorption of 0.32 to 403.23 mg Cr (VI) per gram of lignocellulosic waste adsorbent [43]. Therefore, it is concluded that the struvite-humic acid composite derived herein is an effective adsorbent for chromium.…”

Section: Cr (Vi) Sorption By S-hamentioning

confidence: 69%

Unveiling the Potential of Novel Struvite–Humic Acid Composite Extracted from Anaerobic Digestate for Adsorption and Reduction of Chromium

Wang

Muhmood

et al. 2022

Catalysts

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A novel struvite–humic acid composite (S–HA) was derived from an anaerobic digestate and evaluated for the adsorption and reduction of chromium [Cr (VI)] in this study. The results indicated that the struvite–humic acid composite (S–HA) contains higher contents of oxygen-containing and aromatic functional groups (47.05% and 34.13%, respectively) and a higher specific surface area (19.3 m2 g−1). These special characteristics of S–HA contributed to its higher adsorption capacity (207.69 mg g−1 and 254.47 mg g−1 for pseudo-first and second-order kinetic models, respectively) for chromium. Furthermore, XPS analysis showed that a portion of the bonded Cr (VI) was reduced to Cr (III) by carboxyl and hydroxyl functional groups, which oxidized and changed into ketone and phenol functional groups. Based on the findings, it was concluded that the phosphate–humic acid composite has an outstanding chromium adsorptive and reduction capacity. However, more research is needed to fully understand the potential of the struvite–humic acid composite for chromium adsorption and reduction.

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Section: Cr (Vi) Sorption By S-hamentioning

confidence: 69%

Unveiling the Potential of Novel Struvite–Humic Acid Composite Extracted from Anaerobic Digestate for Adsorption and Reduction of Chromium

Wang

Muhmood

et al. 2022

Catalysts

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“…The adsorption performance decreases after 40 °C in each of the cases which can be analyzed in Figure 11. This might be due to devastation, decimation, and disintegration of the structure lignocellulosic biomass of each adsorbent [53]. This behavior can be analyzed for PWM at 60 °C which has been shown to have an 80% eradication of CGR, and for PWC, which has shown a decrease in adsorption at 40 to 50 °C from 80% to 73.5%, with an afterward increase in adsorption to 80% again at 50 to 60 °C.…”

Section: Optimization Of Temperature For Adsorptionmentioning

confidence: 99%

“…The Gibbs free energy calculated from Equation ( 17) [53], for the adsorption of CGR on chemically modified adsorbents CPWM (-13.7, -6.67, and -4.95 kJmol -1 ) and CPWC (-8.95, -5.9, and -4.5 kJmol -1 ), as compared to their unmodified forms, PWM (-7.4, -5.3, and -4.1 kJmol -1 ) and PWC (-6.5, -4.8, and -3.7 kJmol -1 ) at 298, 308, and 318 kelvin temperatures, respectively, suggests that the process is spontaneous in standard conditions. [67].…”

Section: Adsorption Kinetic Investigationmentioning

confidence: 99%

Eco-Friendly Detoxification of Congo Red Dye from Water by Citric Acid Activated Bioadsorbents Consisting of Watermelon and Water Chestnuts Peels Collected from Indigenous Resources

Hussain

Rehman

Imran

et al. 2022

Adsorption Science & Technology

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The native peels of two cheap, locally available adsorbents, watermelon (PWM) and water chestnuts (PWC), were chemically processed with different chemicals as modifying agents for the determination and assessment of their adsorption ability for the removal and clearance of harmful, venomous, and pernicious Congo red (CGR), as an acidic nature anionic dye, from the aqueous system. In successive batch experiments, the citric acid-treated peels CPWM and CPWC have shown more promising adsorption performance than their raw and untreated peel counterparts due to the availability of additional adsorption active binding sites evidenced through FT-IR and SEM characterizations. In the Langmuir and Temkin models, the correlation coefficients ( R 2 ) for the adsorptive removal of CGR on CPWM, PWM, CPWC, and PWC are very close to unity, 0.99 for each case of adsorption performance. Furthermore, the q max nonlinear statistical results for the elimination of CGR on citric acid-treated adsorbents (CPWM and CPWC) are 8.3 and 7.95 mg/g whereas for their unmodified forms (PWM and PWC) are 2.23 and 4.32 mg/g, respectively, reflecting homogenous and monolayer adsorption mechanism. The greater values of B T 1.4 and 1.3 J/mole, for adsorptive removal of dye on CPWM and CPWC, respectively, as compared to their unmodified forms PWM and PWC which are 0.53 and 0.55 J/mole, respectively, indicate the stronger adsorbate-adsorbent associations. The mechanism follows the pseudo second order in the better mode, while thermodynamic statics for ΔH0,ΔG0, ΔS0, and ΔE0, indicate spontaneous and exothermic behavior of adsorption. This study tends to suggest that citric acid-modified adsorbents CPWM and CPWC may indeed be exploited efficiently to eliminate Congo red dye from wastewater.

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“…Until now, a variety of methods have been used to treat Cr(VI) contamination, for example, chemical precipitation [7], ion exchange [8,9], membrane filtration [10], solvent extraction, coagulation and adsorption [11,12]. Among these methods, adsorption technology is more economical than membrane filtration is, easier to operate than coagulation/precipitation is, and more versatile than ion exchange is, which is considered as the most practical technology [13][14][15][16].…”

Section: Introductionmentioning

confidence: 99%

One-Step Fabrication of Recyclable Konjac Glucomannan-Based Magnetic Nanoparticles for Highly Efficient Cr(VI) Adsorption

Zhang,

Ren,

Fan

et al. 2023

Molecules

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Recently, the natural polymer polysaccharide konjac glucomannan (KGM) has received attention as a promising adsorbent in water treatment due to its low toxicity, cost-effectiveness and biocompatibility. However, the high-level water absorbency of KGM makes it difficult to recover in water treatment. In this study, by combining KGM with magnetic nanoparticles, KGM-based magnetic nanoparticles (KGM-Fe3O4 NPs) with excellent adsorption properties and recyclability for heavy metals were prepared using an one-step precipitation method. The as-prepared KGM-Fe3O4 NPs have a spherical morphology of superparamagnetism with a small particle size (ca. 7.0 nm) and a large specific surface area (160.1 m2·g−1). Taking Cr(VI) as the target heavy metal ion, the above nanoparticles have a high adsorption capacity and fast adsorption rate for Cr(VI). The pseudo-second order kinetic model is more suitable to describe the adsorption process of Cr(VI) by KGM-Fe3O4 NPs, and the maximum adsorption capacity of Cr(VI) onto KGM-Fe3O4 NPs was calculated to be 41.67 mg·g−1 using the Langmuir isotherm model. In addition, KGM-Fe3O4 NPs with adsorbed heavy metal ions can be quickly recovered from a solution, regenerated, and reused in the next cycle. KGM-based Fe3O4 nanoparticles are promising adsorbents that show significant reusability for the removal of metal ions in water and wastewater treatment.

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Adsorption of Cr (VI) on lignocellulosic wastes adsorbents: an overview and further perspective

Cited by 9 publications

References 204 publications

Unveiling the Potential of Novel Struvite–Humic Acid Composite Extracted from Anaerobic Digestate for Adsorption and Reduction of Chromium

Unveiling the Potential of Novel Struvite–Humic Acid Composite Extracted from Anaerobic Digestate for Adsorption and Reduction of Chromium

Eco-Friendly Detoxification of Congo Red Dye from Water by Citric Acid Activated Bioadsorbents Consisting of Watermelon and Water Chestnuts Peels Collected from Indigenous Resources

One-Step Fabrication of Recyclable Konjac Glucomannan-Based Magnetic Nanoparticles for Highly Efficient Cr(VI) Adsorption

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