Removal of arsenic and metals from groundwater impacted by mine waste using zero-valent iron and organic carbon: Laboratory column experiments

Angai, Joanne U.; Ptacek, Carol J.; Pakostová, Eva; Bain, Jeff; Verbuyst, Brent; Blowes, David W.

doi:10.1016/j.jhazmat.2021.127295

Cited by 24 publications

(19 citation statements)

References 64 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…26 Compared to that of sediment PRBs (0.0012 day −1 ), the k in Bio-PRBs (0.033 day −1 ) increased by 2650%. 26 In addition, municipal leaf compost, sawdust, wood chips, silica sand, gravel, and stream sediment with ZVI were used to construct Bio-PRBs for the remediation of Se(VI)-contaminated groundwater. 30 The reaction rate of Se(VI) increased from 0.137 day −1 in ZVI-PRBs 65 to 0.428 day −1 in Bio-PRBs, 30 i.e., a 212% increase.…”

Section: Current Status Of Bio-prb Technologymentioning

confidence: 99%

“…84,85 The results showed that Bio-PRBs significantly improved the remediation of groundwater contaminated with As(III) 44 or As(V). 25,26 Nonsterilized sheep manure, compost, wood chips, and glass beads with ZVI or sterilized sheep manure, compost, wood chips, and glass beads with ZVI were used to construct two Bio-PRB columns for the remediation of simulated groundwater contaminated with As(III). Sheep manure was used as the source of microorganisms.…”

Section: Arsenicmentioning

confidence: 99%

“…Sediments were the source of microorganisms, and organic carbon was used to stimulate the growth and activity of microorganisms (Figure 4). 26 Compared to that of organic-rich sediment Bio-PRBs (22.6%), the η (99.9%) of total influent As(V) increased by 342% in organic-rich sediment + ZVI Bio-PRBs. The k (0.033 day −1 ) of organic-rich sediments + ZVI Bio-PRBs increased by 2438% compared to that of organic-rich sediment Bio-PRBs (0.0013 day −1 ).…”

Section: Arsenicmentioning

confidence: 99%

“…Fe(III) as an electron acceptor was utilized by SRB and promoted the formation of a precipitate (Figure 4). 26 Generally, compared to conventional PRBs, Bio-PRBs are more effective (k increased by 50−2438%) for As(V) and As(III) removal. Moreover, organic matter from organic-rich sediments enhanced the growth of SRB and maintained its high activity, so that SO 4 2− can be continuously reduced to reductant H 2 S. Subsequently, As can be removed by adsorption, reduction, and coprecipitation with sulfide.…”

Section: Arsenicmentioning

confidence: 99%

“…21,22 The fillers include microorganism activation materials, microorganism immobilization materials (carriers), and abiotic reactive materials. Glucose, 23 wheat straw, 24 glycerin, 25 compost leaf mulch, 26 CaO 2 nanoparticles, 27 and coconut shell biochar 28 were the microorganism activation materials. They can promote the activity of native or added microorganisms to promote the removal of o-nitrochlorobenzene (o-NCB), 24 As(V), 25,26 Cr(VI), 29 Se(VI), 30 and phenanthrene (PHE) 28 (Table 1).…”

Section: Introduction 1current Situation Of Soil and Groundwatermentioning

confidence: 99%

See 4 more Smart Citations

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

et al. 2023

View full text Add to dashboard Cite

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.

show abstract