Highly efficient removal of arsenic (III/V) from groundwater using nZVI functionalized cellulose nanocrystals fabricated via a bioinspired strategy

Chai, Fei; Zhang, Rui; Min, Xin; Yang, Zhiwei; Chai, Liyuan; Zhao, Feiping

doi:10.1016/j.scitotenv.2022.156937

Cited by 42 publications

(4 citation statements)

References 41 publications

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“…In addition, oxygen atoms on -OH and C=O can provide free electron pairs to interact with ions of As [ 41 ]. In this process, adsorption, co-precipitation, and complexation are the main mechanisms for immobilizing As and are essential for stabilizing and controlling the diffusion of As in soils [ 42 ].…”

Section: Discussionmentioning

confidence: 99%

Fe-CGS Effectively Inhibits the Dynamic Migration and Transformation of Cadmium and Arsenic in Soil

Yin,

Zhou,

Wang

et al. 2024

Toxics

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The iron-modified coal gasification slag (Fe-CGS) material has excellent performance in purifying heavy-metal-contaminated water due to its good surface properties and adsorption capacities. However, it is unclear whether it can provide long-term simultaneous stabilization of Cd and As in composite-contaminated soils in extreme environments. This study investigated the long-term stabilization of Cd and As in acidic (JLG) and alkaline (QD) soils by simulating prolonged heavy rainfall with the addition of Fe-CGS. Multiple extraction methods were used to analyze the immobilization mechanisms of Cd and As in soil and their effects on bioavailability. The results indicate that the stabilization efficiency was related to the dosage of Fe-CGS. The concentrations of Cd and As in the JLG soil leachate were reduced by 77.6% (2.0 wt%) and 87.8% (1.0 wt%), respectively. Additionally, the availability of Cd and As decreased by 46.7% (2.0 wt%) and 53.0% (1.0 wt%), respectively. In the QD soil leachate, the concentration of Cd did not significantly change, while the concentration of As decreased by 92.3% (2.0 wt%). Furthermore, the availability of Cd and As decreased by 22.1% (2.0 wt%) and 40.2% (1.0 wt%), respectively. Continuous extraction revealed that Fe-CGS facilitated the conversion of unstable, acid-soluble Cd into oxidizable Cd and acid-soluble Cd. Additionally, it promoted the transformation of both non-specifically and specifically adsorbed As into amorphous iron oxide-bound and residual As. Fe-CGS effectively improved the soil pH, reduced the bioavailability of Cd and As, and blocked the migration of Cd and As under extreme rainfall leaching conditions. It also promoted the transformation of Cd and As into more stable forms, exhibiting satisfactory long-term stabilization performance for Cd and As.

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Section: Discussionmentioning

confidence: 99%

Fe-CGS Effectively Inhibits the Dynamic Migration and Transformation of Cadmium and Arsenic in Soil

Yin,

Zhou,

Wang

et al. 2024

Toxics

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“…Typically, the inorganic states of antimony, namely Sb(III) and Sb(V), are identified in waste media based on the prevailing pH 13 , 14 . In oxidizing conditions within the pH range of 3 to 10, antimony takes the form of Sb(OH) 6 - , indicating Sb(V), while Sb(OH) 3 predominantly represents the form of Sb(III) 15 .…”

Section: Introductionmentioning

confidence: 99%

Exploring the feasibility of Zr-based metal–organic frameworks for the recovery of Sb (V) and Sb (III) from mining waste

Bu,

Yang,

Zhang

et al. 2024

Sci Rep

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The present study investigates the efficacy of newly developed Zr-based metal–organic frameworks, specifically MIP-206, and its amine-modified counterpart, MIP-206-NH2, for the re-covery of antimony (Sb) from both synthetic and actual mining wastewater. Batch method studies were employed to examine the effect of waste media pH, Sb concentration, process kinetics, and the performance of the regeneration solution. MIP-206-NH2 exhibited impressive separation capabilities, achieving 102.18 mg/g and 63.23 mg/g for Sb (V) and Sb (III), respectively. In contrast, the pristine MIP-206 reached maximum values of 26.26 mg/g for Sb (V) and 16.95 mg/g for Sb (III). The separation process was well-described by the Langmuir equation, and the kinetics followed the pseudo-second-order model. Although the amine modification resulted in a decrease in the surface area of MIP-206 from 1345.21 to 1169.86 m2/g, SEM and XRD analyses confirmed that the structural integrity of MIP-206-NH2 remained unchanged. In terms of reusability, MIP-206-NH2 maintained up to 90% of its separation performance over 9 cycles, while MIP-206 demonstrated effectiveness for 7 cycles. The regeneration solution exhibited a capacity of approximately 0.63 mol/L for Sb (V) and 0.71 mol/L for Sb (III). Furthermore, MIP-206 and MIP-206-NH2 demonstrated successful application in selectively separating Sb from real mining wastewater.

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“…The adsorption method has been considered as one of the most frequently used and affordable water remediation techniques due to its simple operation, environmental friendliness, and low cost. 7 Over the past decades, numerous adsorbents, such as biochar, 8 hydroxyapatite, 9 nano zero-valent iron, 10 and clay minerals, 11 have been developed for the removal of heavy metals from aqueous solutions. However, these materials still suffer from the drawbacks of low efficiency, slow kinetics, and poor selectivity and stability.…”

Section: Introductionmentioning

confidence: 99%

Unveiling the dual roles of the intercalation of [MoS₄]²⁻ clusters in boosting heavy metal capture by Ca–Al layered double hydroxide

Yang

Zhao

et al. 2023

Environ. Sci.: Nano

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Highly efficient removal of arsenic (III/V) from groundwater using nZVI functionalized cellulose nanocrystals fabricated via a bioinspired strategy

Cited by 42 publications

References 41 publications

Fe-CGS Effectively Inhibits the Dynamic Migration and Transformation of Cadmium and Arsenic in Soil

Fe-CGS Effectively Inhibits the Dynamic Migration and Transformation of Cadmium and Arsenic in Soil

Exploring the feasibility of Zr-based metal–organic frameworks for the recovery of Sb (V) and Sb (III) from mining waste

Unveiling the dual roles of the intercalation of [MoS₄]²⁻ clusters in boosting heavy metal capture by Ca–Al layered double hydroxide

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Highly efficient removal of arsenic (III/V) from groundwater using nZVI functionalized cellulose nanocrystals fabricated via a bioinspired strategy

Cited by 42 publications

References 41 publications

Fe-CGS Effectively Inhibits the Dynamic Migration and Transformation of Cadmium and Arsenic in Soil

Fe-CGS Effectively Inhibits the Dynamic Migration and Transformation of Cadmium and Arsenic in Soil

Exploring the feasibility of Zr-based metal–organic frameworks for the recovery of Sb (V) and Sb (III) from mining waste

Unveiling the dual roles of the intercalation of [MoS4]2− clusters in boosting heavy metal capture by Ca–Al layered double hydroxide

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Unveiling the dual roles of the intercalation of [MoS₄]²⁻ clusters in boosting heavy metal capture by Ca–Al layered double hydroxide