Synthesis of a novel three-dimensional porous carbon material and its highly selective Cr(VI) removal in wastewater

Liang, Hongxu; Zhang, Hongwei; Zhao, Pinye; Zhao, Xinkun; Sun, Huimin; Zhang, Geng; She, Diao

doi:10.1016/j.jclepro.2021.127204

Cited by 48 publications

(3 citation statements)

References 46 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Carbon-based adsorbents are considered to be excellent materials for removing Cr(VI) because of their low cost, highly aromatization, high pore volume, and good adsorption capacity. However, the chemical activation and modification can still increase specific surface area, surface defects, and enhance the adsorption capacity of Cr(VI) (Liang et al 2021)…”

Section: Introductionmentioning

confidence: 99%

Adsorption of Hexavalent Chromium on KOH Activated Carbon Derived from Water Hyacinth Leaf Coated with Polyaniline/Polypyrrole

Taye,

Mehretie,

Getachew

et al. 2024

SEJS

View full text Add to dashboard Cite

KOH-Activated carbon derived from Water Hyacinth (KOH-WHL-AC) was prepared and coated with Polyaniline-Polypyrrole (PANI/PPY) copolymer for the removal of hexavalent chromium (Cr(VI)) from wastewater. The prepared material was characterized by FT-IR and XRD. The effect of pH, contact time, dosage, and initial Cr(VI) concentrations were optimized using batch adsorption experiment. The adsorption kinetics was found to fit better to pseudo-second-order than the pseudo-first order model. Langmuir and Freundlich isotherm models were analyzed using linear fitting. It was found that the Langmuir adsorption model gives the best fit indicating that the monolayer adsorption of Cr(VI) on the KOH-WHL-AC. The highest adsorption capacity of 409.83 mg/g was achieved at pH 1.0, and equilibrium was achieved within 420 min. The reuse efficiency of the synthesized material was also found to be greater than 54% for five consecutive cycles. Thermodynamic studies have also been carried out and the adsorption was found to be spontaneous and endothermic

show abstract

Section: Introductionmentioning

confidence: 99%

Adsorption of Hexavalent Chromium on KOH Activated Carbon Derived from Water Hyacinth Leaf Coated with Polyaniline/Polypyrrole

Taye,

Mehretie,

Getachew

et al. 2024

SEJS

View full text Add to dashboard Cite

show abstract

“…The maximum concentration of Cr(VI) in surface water (0.1 mg L −1 ) has been restricted by the World Health Organization (WHO) [ 11 , 12 ]. Hence, numerous studies have been conducted to mitigate Cr(VI) poisoning and center the environmental remediation of polluted soil and water body, emphasizing the significant necessity for developing practical approaches to get rid of Cr(VI) from wastewater [ 13 , 14 ].…”

Section: Introductionmentioning

confidence: 99%

Enhanced Chromium (VI) Adsorption onto Waste Pomegranate-Peel-Derived Biochar for Wastewater Treatment: Performance and Mechanism

Chen

Yang

Abbas

2023

Toxics

View full text Add to dashboard Cite

Surface chemical modification allows for the rational construction of biochar with desirable structures and functionalities for environment purification. Fruit-peel-derived adsorbing material has been well studied in the adsorption of heavy-metal removal due to its abundance and non-toxicity, but its precise mechanism in removing chromium-containing pollutants remains unclear. Herein, we explored the potential application of engineered biochar prepared from fruit waste via chemical modification to remove chromium (Cr) from an aqueous solution. By synthesizing two types of agricultural residue-derived adsorbents, including pomegranate peel adsorbent (PG) and its modified product, pomegranate-peel-derived biochar (PG-B), via chemical and thermal decomposition methods, we elucidated the adsorption property of Cr(VI) on the studied materials and identified the cation retention mechanism of the adsorption process. Batch experiments and varied characterizations demonstrated that superior activity was exhibited in PG-B, which can contribute to the porous surfaces caused by pyrolysis and effective active sites resulting from alkalization. The highest Cr(VI) adsorption capacity is obtained at pH 4, a dosage of 6.25 g L−1, and a contact time of 30 min. The maximum adsorption efficiency of 90.50% in a short period (30 min) was obtained on PG-B, while PG reached a removal performance of 78.01% at 60 min. The results from kinetic and isotherm models suggested that monolayer chemisorption dominated the adsorption process. The Langmuir maximum adsorption capacity is 16.23 mg g−1. This study shortened the adsorption equilibrium time of pomegranate-based biosorbents and presents positive significance in designing and optimizing waste fruit-peel-derived adsorption materials for water purification.

show abstract

“…Among the reported approaches, selective adsorption is one of the most promising approaches for the removal of metallic pollutants from wastewater. The chemistry of the reported adsorbents used to remove Cr(VI) includes polymers [11,12], MOFs [10], transition metal embedded 3D hydrogel [13], metal sulphides [14,15], 3D porous carbon [16], iron oxide composites [17], TiO2 nanofibers [18] that could be prepared by electrospinning technique [19,20], amino-functionalized MXenes [21], PANI-WO 3 [22], transition metals ferrites [23], nanosized Fe(0) [24,25], and so on. Although these reported substrates have an acceptable Cr(VI) removal performance, they were still plagued with some disadvantages during process, such as high cost, limited chemical or thermal stability, and poor regeneration.…”

Section: Introductionmentioning

confidence: 99%

Facile Synthesis of Fe(0)@Activated Carbon Material as an Active Adsorbent towards the Removal of Cr (VI) from Aqueous Media

et al. 2022

View full text Add to dashboard Cite

A novel adsorbent substrate based on zero-valent iron in activated carbon (Fe(0)@AC) was introduced in this work, and was evaluated as a cheap adsorbent for the removal of Cr(VI) from aqueous solutions. The as-prepared Fe(0)@AC material was chemically prepared via NaBH4 reduction in the presence of ferric chloride as an iron source, followed by the addition of powdered activated carbon. The different physicochemical tools confirm the successful preparation of Fe(0) composite with activated carbon as a heterogeneous composite with heterogeneous morphology of the rock-shape structure, which could play a role in the metal adsorption application. Interestingly, the removal efficiency (RE) of Cr(VI) was increased from 52% to 84% due to the Fe(0)@AC adsorbent being changed from 0.2 to 0.4 g/100 mL. Following this, the increase rate was stabilized, and the RE reached 95% in the case of 0.8 g/100 mL from Fe(0)@AC adsorbent. This result could be due to the increase in the sorbent active sites with more contents from Fe(0)@AC. The adsorption model based on the Langmuir approach could successfully describe the experimental outcomes for Cr(VI) removal by Fe(0)@AC with the correlation coefficient of 0.977. To conclude, Fe(0)@AC heterogeneous material is an active adsorbent for Cr(VI) removal from aqueous solutions.

show abstract

Synthesis of a novel three-dimensional porous carbon material and its highly selective Cr(VI) removal in wastewater

Cited by 48 publications

References 46 publications

Adsorption of Hexavalent Chromium on KOH Activated Carbon Derived from Water Hyacinth Leaf Coated with Polyaniline/Polypyrrole

Adsorption of Hexavalent Chromium on KOH Activated Carbon Derived from Water Hyacinth Leaf Coated with Polyaniline/Polypyrrole

Enhanced Chromium (VI) Adsorption onto Waste Pomegranate-Peel-Derived Biochar for Wastewater Treatment: Performance and Mechanism

Facile Synthesis of Fe(0)@Activated Carbon Material as an Active Adsorbent towards the Removal of Cr (VI) from Aqueous Media

Contact Info

Product

Resources

About