Enhanced Cr(VI) removal from water using a green synthesized nanocrystalline chlorapatite: Physicochemical interpretations and fixed-bed column mathematical model study

Han, Xuan; Zhang, Yong; Chen, Kewei; Yu, Xiangnan; Li, Shiyin; Wei, Wei

doi:10.1016/j.chemosphere.2020.128421

Cited by 51 publications

(17 citation statements)

References 92 publications

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“…40 The Cr 2p3/2 orbital also has two peaks, which are located at 576.6 and 578.7 eV, corresponding to the Cr(III) 2p3/2 orbital and the Cr(VI) 2p3/2 orbital, respectively. 80,81 It proves that LDF-3-70000 can reduce part of Cr(VI) to Cr(III). By calculating the corresponding peak areas of Cr(III) and Cr(VI), the atomic ratio of Cr(III) and Cr(VI) is 1.84:1, which indicates that LDF-3-70000 has strong reducibility, and 64.79% of the adsorbed Cr(VI) is reduced to Cr(III).…”

Section: ■ Results and Discussionmentioning

confidence: 91%

Biomimetic Polylactic Acid Electrospun Fibers Grafted with Polyethyleneimine for Highly Efficient Methyl Orange and Cr(VI) Removal

Deng

et al. 2023

Langmuir

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The rapid growth of industrialization has resulted in the release of large quantities of pollutants into the environment, especially dyes and heavy metals, which are environmentally hazardous for humans and animals. It is considered as the most promising and environmentally friendly route to develop green materials by using the green modification method, which has no negative impact on the environment. In this work, the green material of polylactic acid (PLA) was used as the substrate material, and a novel modification method of polydopamine (PDA)-assisted polyethyleneimine (PEI) grafting was developed. The electrospun PLA fibers are mainly composed of stereocomplex crystallites, which were achieved via the electrospinning of poly(l-lactic acid) and poly(d-lactic acid). The water-soluble PEI was grafted onto the PDA-modified PLA fibers through the glutaraldehyde-assisted cross-linking reaction. The prepared composite fibers can be degraded, which is environmentally friendly and meets the requirements of sustainable development. The potential application of such PLA composite fibers in wastewater treatment was intensively evaluated. The results show that at appropriate fabrication conditions (PDA concentration of 3 g·L–1 and a PEI molecular weight of 70,000 g·mol–1), the composite fibers exhibit the maximum adsorption capacities of 612 and 398.41 mg·g–1 for methyl orange (MO) and hexavalent chromium [Cr(VI)], respectively. Simultaneously, about 64.79% of Cr(VI) adsorbed on the composite fibers was reduced to Cr(III). The above results show that the PLA composite fibers have a good development prospect in the field of wastewater treatment.

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Section: ■ Results and Discussionmentioning

confidence: 91%

Biomimetic Polylactic Acid Electrospun Fibers Grafted with Polyethyleneimine for Highly Efficient Methyl Orange and Cr(VI) Removal

Deng

et al. 2023

Langmuir

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“… Reference Biomass Contaminate Treat Elution Capacity (mg/g) Capacity (mg/g) with the Eq. ( 6 ) Present article Cellulose xanthogenate (ECx) Cr (VI) EDTA 16 51 Present article Cellulose Alkaline (EC-Na) Cr (VI) EDTA 11 32 39 Phanera vahlii Cr (VI) NaOH 30 62 40 A. barbadensis Miller Ni (II) HCl 14 20 41 Brown algae Al (III) CaCl 2 12 20 EDTA 30 HNO 3 35 HCl 35 42 Green synthesized nanocrystalline chlorapatite Cr (VI) NaOH 20 35 43 Graphite Cr (VI) HNO 3 20 52 44 Biochar alginate ...…”

Section: Resultsmentioning

confidence: 99%

“…In Ref. 39 used the biomass of Phanera vahlii to remove Cr (VI) obtaining results of 30 mg/g and with NaOH they reached capacities in the reuse process of this biomass up to 62 mg/g, reaching almost double of its total capacity 41 , also used NaOH for desorption processes with green synthesized nanocrystalline chlorapatite biomass, achieving results of 75% more. The eluent HCl is also a good chemical agent to use in desorption processes since it reached more than 100% in the reuse of biochar alginate for Cr (VI) but not so significant with biomass A. barbadensis Miller to remove Ni (II) and in 40 significant results were also obtained to remove Pb (II) with pine cone Shell biomass.…”

Section: Resultsmentioning

confidence: 99%

Development of a treatment for water contaminated with Cr (VI) using cellulose xanthogenate from E. crassipes on a pilot scale

Sayago

Ballesteros

2023

Sci Rep

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Water care is an imperative duty in industries with effluents loaded with pollutants such as heavy metals, especially chromium (VI), extremely dangerous for humans and the environment. One way of treating water is possible through a continuous system with dry and crushed vegetable biomass of cellulose xanthogenate because it can adsorb heavy metals, especially due to its low production costs. Through continuous systems and with the waste of PET plastics, it is possible to develop a water treatment process adapting this system and biomass. The objective of this research is the development of a treatment for water contaminated with Cr (VI) using cellulose xanthogenate from E. crassipes on a pilot scale. Where a mass balance conducted to determine the adsorption capacity of this heavy metal, corroborating it through the Thomas model. The treatment process eliminated around 95% of Cr (VI) present in the water, in addition, biomass reuse cycles carried out, which maintained a considerable adsorption capacity in all the cycles conducted through EDTA reagent.

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“…En la banda con un máximo de alrededor de 3429 cm -1 correspondiente al modo vibracional de estiramiento y en 1636 cm -1 se asigna a la banda con un modo vibracional de flexión simétrica (𝜈𝜈 2 ) pertenecientes al grupo 𝑃𝑃𝐻𝐻 − , del agua adsorbida presente en la hidroxiapatita (Panda et al, 2003). Asimismo, se observa una elongación en la banda de la región de las vibraciones del grupo 𝑃𝑃𝐻𝐻 − , en 3640, 3570 y 3498 cm -1 , atribuidas a la interacción entre el grupo 𝑃𝑃𝐻𝐻 − de la HAp y los iones de 𝐶𝐶𝐶𝐶 − de la ClAp (Díaz González, 1974;Han et al, 2021).…”

Section: Espectroscopia Infrarroja Por Transformada De Fourierunclassified

“…Por otra parte, la cloroapatita (ClAp) y la HAp, se estudian para el desarrollo de materiales, con uso en la contención de desechos nucleares e industriales (Rulis et al, 2004). Así mismo la ClAp, ha sido estudiada para sintetizar un nuevo tipo de nanocloroapatita estabilizada (nClAp) para la remediación de sedimentos contaminados de Pb(II), Cd(II) y Cr(VI) (Deng et al, 2020;Han et al, 2021;Huang et al, 2018;Wan et al, 2018).…”

Section: Introductionunclassified

El pH como parámetro en la síntesis de hidroxiapatita y cloroapatita a partir del método hidrotermal asistido por microondas

Villaseñor-Cerón

Reyes-Valderrama

López-Ortiz

et al. 2021

ICBI

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En el presente trabajo se realiza la síntesis de apatitas, a través del método hidrotermal asistido por microondas, variando el pH en 5, 6, 7, 8, 9 y 10. La caracterización fisicoquímica y estructural se realizó por las técnicas: MEB-EDS, DRX y FTIR, determinando una tamaño de cristal de 8 a 10 nm en función del pH; se observó la formación de aglomerados longitud, constituidos por fibras de entre 43.4 a 108.5 nm de diámetro y 412.4 a 1603.8 nm de longitud, así mismo se determina la presencia de planos cristalográficos característicos de HAp y ClAp . Además, se identifican los modos vibracionales pertenecientes a ambas estructuras y una elongación en la banda del grupo OH-, atribuida a la interacción entre el grupo OH- de la HAp y los iones de Cl- de la ClAp. Los resultados obtenidos contribuyen a establecer el efecto del pH en el tamaño de cristal y de partícula para la síntesis de HAp y ClAp

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Enhanced Cr(VI) removal from water using a green synthesized nanocrystalline chlorapatite: Physicochemical interpretations and fixed-bed column mathematical model study

Cited by 51 publications

References 92 publications

Biomimetic Polylactic Acid Electrospun Fibers Grafted with Polyethyleneimine for Highly Efficient Methyl Orange and Cr(VI) Removal

Biomimetic Polylactic Acid Electrospun Fibers Grafted with Polyethyleneimine for Highly Efficient Methyl Orange and Cr(VI) Removal

Development of a treatment for water contaminated with Cr (VI) using cellulose xanthogenate from E. crassipes on a pilot scale

El pH como parámetro en la síntesis de hidroxiapatita y cloroapatita a partir del método hidrotermal asistido por microondas

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