Overview of As(V) adsorption on Zr-functionalized activated carbon for aqueous streams remediation

Velázquez-Jiménez, Litza Halla; Arcibar‐Orozco, Javier A.; Rangel-Méndez, J. Rene

doi:10.1016/j.jenvman.2018.01.072

Cited by 30 publications

(29 citation statements)

References 47 publications

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“…Above pH 6.0, As adsorption declined due to increased negative charges on the two adsorbents and on As species (increased concentration ratio of HAsO4 2-/ H2AsO4 -). Furthermore, competition between increased concentrations of OHand negatively charged As species (H2AsO4and HAsO4 2-) for adsorption occurred (Liu et al 2012, Velazquez-Jimenez et al 2018. The final pH of the suspensions was lower than the initial pH at final pHs greater than pH 6, but the change in pH was negligible at pHs lower than 6.…”

Section: Ph Effect On Zeta Potential and As Adsorptionmentioning

confidence: 99%

Iron-impregnated granular activated carbon for arsenic removal: Application to practical column filters

Kalaruban

Loganathan

Nguyễn

et al. 2019

Journal of Environmental Management

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Section: Ph Effect On Zeta Potential and As Adsorptionmentioning

confidence: 99%

Iron-impregnated granular activated carbon for arsenic removal: Application to practical column filters

Kalaruban

Loganathan

Nguyễn

et al. 2019

Journal of Environmental Management

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“…ZnCl 2 impregnation could signicantly increase the generation of mesopores and micropores, the specic surface area, and the yields of biochar. [23][24][25][26] Recently, transitional Zr(IV)-binding chitosan complexes, orange waste gel and AC have been applied for the removal of phosphate, 27,28 As(V) and As(III), 29,30 Cr(VI) and vanadium(V), 13,31,32 because hydrous Zr(IV) can form tetrahedral geometries with abundant water molecules and hydroxyl ions, which could give rise to adsorption sites and high adsorption affinity toward oxyanions. Moreover, Zr(IV) in its hydrated form can resist the adsorption of alkalis, acids, reductants and oxidants, which can improve the selectivity of the absorbents.…”

Section: -19mentioning

confidence: 99%

“…Finally, Cs-BC and Zn-BC were obtained. Zr(IV)-impregnated CS was prepared in accordance with the procedures described by Liao et al 34 First, 30 g CS was added to 400 mL of designed solution with a pH value between 1.7 and 2.0 for 24 h. Then, 20 g of Zr(SO 4 ) 2 was added, and the mixture was stirred for 4 h at 30 C. Aer this, we gradually added NaHCO 3 solution (15% w/w) over 2 h, until the desired pH between 4.0 and 4.5 was reached, aer which, the reaction was continued for another 4 h at 40 C. Aer impregnation, the Zr(IV)-impregnated CS was collected via ltration, washed with deionized water and nally dried at 70 C for 24 h. The product was carbonized at 700 C according to the fast pyrolysis process described above. The carbonized material was sieved to obtain a particle size of 40 mesh.…”

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confidence: 99%

Development, modification, and application of low-cost and available biochar derived from corn straw for the removal of vanadium(v) from aqueous solution and real contaminated groundwater

et al. 2018

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In this work, a low-cost and available material for use as a permeable reactive barrier (PRB) to prevent vanadium in groundwater from leaking into river water was developed. Three modified biochars were prepared from available corn straw pretreated with CsCl, Zn(II), and Zr(IV) to enhance ion exchange capacity (IEC) and specific surface area, and were designated as Cs-BC, Zn-BC, and Zr-BC, respectively. These materials were characterized via IEC, N 2 adsorption-desorption, Fourier-transform infrared spectroscopy (FTIR), and X-ray diffraction (XRD) analyses. The Langmuir isotherm model could be applied for the best fit for the adsorption data of Cs-BC and Zr-BC, indicating that vanadium(V) sorption occurred in a monolayer. The vanadium(V) adsorption capacities of Cs-BC, Zn-BC, and Zr-BC were 41.07, 28.46, and 23.84 mg g À1 , respectively, which were 3.22-5.55 times higher than that of commercial activated carbon (AC) (7.40 mg g À1 ), probably because of their higher IECs and specific surface areas after modification. In addition, no heavy metal leaching was found from the modified biochars during the adsorption processes when pH > 2. According to the FTIR and XRD patterns, the adsorption mechanism of Cs-BC and Zr-BC was ion exchange, whereas for Zn-BC, it was mainly surface precipitation and electrostatic attraction. The adsorption of vanadium(V) onto the modified biochars was independent of pH in the range of 4.0 to 8.0. Furthermore, the removal efficiency of the vanadium(V) in real contaminated groundwater from the catchment of the Chaobei River by Zn-BC reached 100% at a dose of 4 g L À1. Hence, modified biochars are promising PRB filling materials for removing vanadium(V) from contaminated groundwater.

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“…The experimental data presented in Table 1 indicated that uptake of phosphate onto ACWNS was was well fitted by the Freundlich isotherm models. Thus, the adsorption of phosphate onto ACWNS suggests multilayer heterogeneous removal of phosphate (Velazquez-jimenez et al, 2018). Moreover, from Table 1, the Freundlich equation presented the highest R 2 values and lowest SSE values compared to both the Langmuir and Temkin equations.…”

Section: Effect Of Equilibrium Concentration and Fitting Of Isotherm Modelsmentioning

confidence: 86%

Amine-grafted Walnut Shell for Efficient Removal Phosphate and Nitrate from Aqueous Solution

Dovi¹,

Aryee²,

Li³

et al. 2021

Preprint

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The presence of emerging pollutants such as PO43− and NO3− in water bodies has attracted worldwide concern about their severe effects on water bodies and the health of humankind in general. Therefore, to preserve the health of humankind and environmental safety, it is of the essence that industrial effluents are treated before they are discharged into water bodies. To accomplish this, the walnut shell was functionalized (ACWNS) with amine for effective removal of PO43− and NO3−. Characterization studies of ACWNS were conducted using FTIR, XRD, XPS and BET techniques. Removal of both ions was enhanced at lower temperature (293 K). The maximum uptake capacity of phosphate and nitrate, at 293 K, was 82.2 and 35.7 mg g− 1, respectively. The primary mechanism by which these ions were uptaken onto ACWNS could be electrostatic interactions and hydrogen bonding.Pseudo-second-order kinetics fitted the PO43̶ and NO3− adsorption, while Freundlich and Langmuir models best fitted the PO43̶ and NO3̶ adsorption, respectively. Furthermore, in the binary system, the uptake capacity of phosphate decreased by 14.4% while nitrate witnessed a reduction in its uptake capacity by 10.4 %. So ACWNS has a higher attraction towards both ions and this could be attributed to the existence of a variety of active areas on ACWNS that exhibit a degree of specificity for the individual anions. Results obtained from real water samples analysis confirmed ACWNS as highly efficient to be utilized for practical remediation processes.

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Overview of As(V) adsorption on Zr-functionalized activated carbon for aqueous streams remediation

Cited by 30 publications

References 47 publications

Iron-impregnated granular activated carbon for arsenic removal: Application to practical column filters

Iron-impregnated granular activated carbon for arsenic removal: Application to practical column filters

Development, modification, and application of low-cost and available biochar derived from corn straw for the removal of vanadium(v) from aqueous solution and real contaminated groundwater

Amine-grafted Walnut Shell for Efficient Removal Phosphate and Nitrate from Aqueous Solution

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