The multi-process reaction model and underlying mechanisms of 2,4,6-trichlorophenol removal in lab-scale biochar-microorganism augmented ZVI PRBs and field-scale PRBs performance

Wang, Wenbing; Gong, Tiantian; Li, Hui; Liu, Yiming; Dong, Qianling; Zan, Rixia; Wu, Yongbin

doi:10.1016/j.watres.2022.118422

Cited by 37 publications

(17 citation statements)

References 51 publications

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“…Peaks at 725.0 and 711.0 eV indicated the presence of iron oxide and hydroxyl oxides such as FeO, Fe 2 O 3 , Fe 3 O 4 , Fe(OH) 2 /Fe(OH) 3 , and FeOOH on the AZVI surface, , while 706.6 and 720.0 eV were attributed to the Fe 0 peak . For the surface O species, the peaks at 532.4, 531.4, and 529.9 eV were assigned to adsorbed water (H 2 O), iron hydroxide (Fe–OH), and iron oxide (Fe–O) (Figure b) …”

Section: Resultsmentioning

confidence: 99%

“…20 For the surface O species, the peaks at 532.4, 531.4, and 529.9 eV were assigned to adsorbed water (�H 2 O), 21 iron hydroxide (Fe−OH), and iron oxide (Fe−O) (Figure 2b). 22 The content of valence state percentage was further calculated by using the peak area. As shown in Figure S3a, the Fe 0 proportion increased from P-AZVI to AZVI@3, and the highest surface Fe 0 proportion was observed in AZVI@3 with a value of 35.2%.…”

Section: ■ Materials and Methodsmentioning

confidence: 99%

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Fabricating Amorphous Zero-Valent Iron for Cr(VI) Efficient Reduction: Unveiling the Effect of Ethylenediamine on Physicochemical Properties

et al. 2023

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Amorphous zero-valent iron (AZVI) has attracted wide attention due to its high-efficiency reduction ability. However, the effect of different EDA/Fe(II) molar ratios on the physicochemical properties of the synthesized AZVI requires further investigation. Herein, series of AZVI samples were prepared by changing the molar ratio of EDA/Fe(II) to 1/1 (AZVI@1), 2/1 (AZVI@2), 3/1 (AZVI@3), and 4/1 (AZVI@4). When the EDA/Fe(II) ratio increased from 0/1 to 3/1, the Fe 0 proportion on the AZVI surface increased from 26.0 to 35.2% and the reducing ability was enhanced. As for AZVI@4, the surface was severely oxidized to form a large amount of Fe 3 O 4 , and the Fe 0 content was only 74.0%. Moreover, the removal ability of Cr(VI)

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Section: Resultsmentioning

confidence: 99%

Section: ■ Materials and Methodsmentioning

confidence: 99%

Fabricating Amorphous Zero-Valent Iron for Cr(VI) Efficient Reduction: Unveiling the Effect of Ethylenediamine on Physicochemical Properties

et al. 2023

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“…Compared to that of wheat straw pellet Bio-PRBs (0.013 mg g –1 ), the PHE adsorption capacity (0.035 mg g –1 ) increased by 169% in coconut shell biochar Bio-PRBs . The biochar-immobilized microorganism and ZVI gel beads were developed to construct Bio-PRBs for the treatment of 2,4,6-TCP-contaminated groundwater . Compared to that of ZVI-PRBs (0.096 day –1 ), the k (0.264 day –1 ) of Bio-PRBs increased by 175% .…”

Section: Advances In Bio-prb Technologymentioning

confidence: 99%

“…21 Compared to that of ZVI-PRBs (0.096 day −1 ), the k (0.264 day −1 ) of Bio-PRBs increased by 175%. 21 organic-rich sediments with ZVI were used to construct Bio-PRBs for the remediation of groundwater contaminated with As(V). 26 Compared to that of sediment PRBs (0.0012 day −1 ), the k in Bio-PRBs (0.033 day −1 ) increased by 2650%.…”

Section: Current Status Of Bio-prb Technologymentioning

confidence: 99%

“…19 Currently, Bio-PRBs can be divided into two types: nonremovable reaction barriers and removable reaction columns. 20,21 Compared to nonremovable reaction barriers, the removable reaction columns are more conducive to installation, disassembly, and regular replacement of fillers. 21,22 The fillers include microorganism activation materials, microorganism immobilization materials (carriers), and abiotic reactive materials.…”

Section: Introduction 1current Situation Of Soil and Groundwatermentioning

confidence: 99%

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Microbe–Mineral Interaction-Induced Microorganism-Augmented Permeable Reactive Barriers for Remediation of Contaminated Soil and Groundwater: A Review

et al. 2023

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Conventional zerovalent iron permeable reactive barriers (PRBs) are limited by unknown iron corrosion kinetics and permeability loss, hindering access to desirable remediation targets. Against this background, microbe−mineral interactioninduced microorganism-augmented PRBs (Bio-PRBs) are considered a promising cutting-edge technology for increasing reaction rate k and enhancing removal efficiency η. This study provides original insights into the various active media and microbial carriers and the mechanisms of interaction among microorganisms, active media, and various contaminants. The results showed that microorganism-activated and microorganism-immobilized Bio-PRBs increased k and η by 40−2650% and 25−400%, respectively. In Bio-PRBs, the removal of contaminants involves the coupling of biodegradation, chemical reduction, and adsorption processes. Microorganisms promote the liquefaction of metal minerals into metal ions, thus forming a positive cycle by "microbe−mineral" interaction. Moreover, nonmetallic fillers affect k through synergistic effects of biodegradation, biological reduction, and electron donor groups. Microorganisms accelerate the e − transfer to promote the contaminants' transformation, and nonmetallic fillers are also conducive to improving diversity and abundance. Furthermore, some suggestions are made regarding the development and application of Bio-PRBs. Bio-PRBs provide efficient and novel approaches and strategies for eliminating soil and groundwater contamination based on microbe−mineral interaction and stimulation.

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Biochar-assisted degradation of oxytetracycline by Achromobacter denitrificans and underlying mechanisms

Zhang,

Hou,

Zhang

et al. 2023

Bioresource Technology

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The multi-process reaction model and underlying mechanisms of 2,4,6-trichlorophenol removal in lab-scale biochar-microorganism augmented ZVI PRBs and field-scale PRBs performance

Cited by 37 publications

References 51 publications

Fabricating Amorphous Zero-Valent Iron for Cr(VI) Efficient Reduction: Unveiling the Effect of Ethylenediamine on Physicochemical Properties

Fabricating Amorphous Zero-Valent Iron for Cr(VI) Efficient Reduction: Unveiling the Effect of Ethylenediamine on Physicochemical Properties

Microbe–Mineral Interaction-Induced Microorganism-Augmented Permeable Reactive Barriers for Remediation of Contaminated Soil and Groundwater: A Review

Biochar-assisted degradation of oxytetracycline by Achromobacter denitrificans and underlying mechanisms

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