Synthesis of floatable magnetic iron/biochar beads for the removal of chromium from aqueous solutions

Qiao, Kaili; Tian, Weijun; Bai, Jie; Zhao, Jing; Du, Zhaoyang; Song, Ting; Chu, Meile; Wang, Liang; Xie, Wenlong

doi:10.1016/j.eti.2020.100907

Cited by 38 publications

(14 citation statements)

References 56 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…3 According to the World Health Organization (WHO), total chromium concentration must be lower than 0.05 mg/L in drinking water and 0.1 mg/L in surface waters. 4,5 So, removal of chromium ions from water samples is very important for human, animal and environmental health.…”

Section: Introductionmentioning

confidence: 99%

Removal of Cr Ions from Aquatic Solutions Using Olive Leaves as Low-cost Bio-sorbent

Sahin¹,

Aslan²,

Tüzen³

et al. 2020

At.Spectrosc.

View full text Add to dashboard Cite

Contamination of water by chromium (Cr) creates serious pollution in terms of the environment and public health, since its different forms become released into air, water, soil and residential areas. In the present work, olive leaf powder (OLP) was evaluated as a novel low-cost sorbent due to its various functional groups such as amide, hydroxyl, carboxyl, and carbonyl which are responsible for the bio-removal of chromium ions from aqueous solutions. The chemical functional groups and microstructure of the OLP bio-sorbent were characterized by the Fourier Transform Infrared (FT-IR) spectroscopy and scanning electron microscopy (SEM) techniques. The bio-sorption conditions were optimized as pH 4, contact time 60 min, bio-sorbent dosage 40 g/L, temperature 40 °C. The bio-sorption isotherm was well fitted to the Langmuir model, and the predicted maximum bioremoval capacity of the OLP was estimated at 42.4 mg/g under the above-mentioned experimental conditions. The reuse performance of the bio-sorbent was determined after repeated sorption/desorption cycles. The thermodynamic examination showed that the chromium sorption by OLP was endothermic in thermal nature. The kinetic evaluations indicated that the bio-sorption process well followed with the pseudo-second-order model. The overall results demonstrated that the OLP can be thought as a potential bio-sorbent for cleaning of chromium-contaminated water and wastewater due to its advantageous properties such as low cost, availability, renewable nature, and remarkable bio-sorption capacity.

show abstract

Section: Introductionmentioning

confidence: 99%

Removal of Cr Ions from Aquatic Solutions Using Olive Leaves as Low-cost Bio-sorbent

Sahin¹,

Aslan²,

Tüzen³

et al. 2020

At.Spectrosc.

View full text Add to dashboard Cite

show abstract

“…It emerged that Langmuir isotherm was well fitted with R 2 value of 0.997. Wan et al (2018) tested m-phenylenediamine-modified magnetic chitosan for the concurrent reduction-absorption of Cr 6+ and 227.27 mg/g Cr could be removed at pH < 4 [ 137 ]. Wang et al (2019) used a β-cyclodextrin (b-CD) functionalized three-dimensional structured graphene foam for the removal of Cr 6+ and achieved 99.8% efficiency at pH 3 [ 136 ].…”

Section: Cr Removal Methodsmentioning

confidence: 99%

A Comprehensive Review of the Current Progress of Chromium Removal Methods from Aqueous Solution

Islam

Mohana

Rahman

et al. 2023

Toxics

View full text Add to dashboard Cite

Chromium (Cr) exists in aqueous solution as trivalent (Cr3+) and hexavalent (Cr6+) forms. Cr3+ is an essential trace element while Cr6+ is a dangerous and carcinogenic element, which is of great concern globally due to its extensive applications in various industrial processes such as textiles, manufacturing of inks, dyes, paints, and pigments, electroplating, stainless steel, leather, tanning, and wood preservation, among others. Cr3+ in wastewater can be transformed into Cr6+ when it enters the environment. Therefore, research on Cr remediation from water has attracted much attention recently. A number of methods such as adsorption, electrochemical treatment, physico-chemical methods, biological removal, and membrane filtration have been devised for efficient Cr removal from water. This review comprehensively demonstrated the Cr removal technologies in the literature to date. The advantages and disadvantages of Cr removal methods were also described. Future research directions are suggested and provide the application of adsorbents for Cr removal from waters.

show abstract

“…Many researchers have observed a similar trend, that is, as the mass of the adsorbent increased, the binding sites for the adsorbate also increased. [22,36,52] Enhanced reduction of Cr(VI) to Cr(III) was observed when lower masses (0.05, 0.10, and 0.15 g) were used, but the % removal of total Cr ranged between 15 and 55 %. Although 100 % removal of Cr(VI) was observed in this range, it can be speculated that as the adsorption of Cr(VI) occurred, desorption was also simultaneously occurring, leaving behind less toxic Cr(III) in solution.…”

Section: Adsorption Dosage Concentrationmentioning

confidence: 99%

“…[33,34] In adsorption, biochar has been investigated for the removal of organic and inorganic pollutants. [12,29,33,35,36] Yang et al reported the degradation of para-nitrophenols by persistent free radicals supported by biochar. [37] The sorption of copper ions [38] as well as nitrate and phosphate ions [39] onto biochar demonstrated the versatility of these types of materials in metal cation and anionic compound removal applications.…”

Section: Introductionmentioning

confidence: 99%

Reduction and Adsorption of Hexavalent Chromium by Iron Sulfide Loaded Biochar: Isotherms, Kinetics and Thermodynamics

Qhubu,

Lesaoana,

Nomngongo

et al. 2023

ChemistrySelect

View full text Add to dashboard Cite

The removal of noxious Cr(VI) from water has gained worldwide attention. In this study, biochar derived from macadamia nut shells (MHP) was embedded with iron sulfide (FeS) nanoparticles produced through a solid‐phase reduction of pyrite. The MHP‐FeS composite was evaluated for the adsorption of Cr(VI) and its subsequent reduction to Cr(III). The scanning electron microscope images revealed that the particles were of irregular shape, while the energy dispersive spectroscopy results showed the existence of Fe, S, O, and C atoms. X‐ray diffraction peaks at 2=29.8°, 33.7°, 43.7°, and 53.1° were characteristic of the formation of FeS nanoparticles. A maximum Cr(VI) adsorption capacity of 4.95 mg/g was obtained at pH 3, 60 min, and 25 °C. The higher correlation coefficient (R2>0.873) and lower residual standard error (RSE=1.43) values pointed to the adsorption process favoring Langmuir and pseudo‐second‐order models. As per thermodynamic reaction calculations, the remediation process was spontaneous and endothermic. With further optimization, this material could be a potential adsorbent and reductant for Cr(VI) in water.

show abstract

Synthesis of floatable magnetic iron/biochar beads for the removal of chromium from aqueous solutions

Cited by 38 publications

References 56 publications

Removal of Cr Ions from Aquatic Solutions Using Olive Leaves as Low-cost Bio-sorbent

Removal of Cr Ions from Aquatic Solutions Using Olive Leaves as Low-cost Bio-sorbent

A Comprehensive Review of the Current Progress of Chromium Removal Methods from Aqueous Solution

Reduction and Adsorption of Hexavalent Chromium by Iron Sulfide Loaded Biochar: Isotherms, Kinetics and Thermodynamics

Contact Info

Product

Resources

About