Effects of bacterial cells and two types of extracellular polymers on bioclogging of sand columns

Xia, Lu; Zheng, Xilai; Shao, Haibing; Xin, Jia; Sun, Zhaoyue; Wang, Leyun

doi:10.1016/j.jhydrol.2016.01.075

Cited by 40 publications

(11 citation statements)

References 57 publications

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“…EPS content was also expressed as µg C•g DW -1 considering all EPS was built of glucose polysaccharides. Polysaccharides have been proved to be the main component of EPS in sands (Xia et al 2016;Xia et al 2014;Hoffmann and Gunkel, 2011).…”

Section: Biofilm Biomass: Content Of Polysaccharides In Epsmentioning

confidence: 99%

“…Several works have studied bioclogging processes focusing on the spatial and temporal evolution of bacteria and/or EPS concentrations (Xia et al 2016;Dupin et al 2001;Vandevivere and Baveye, 1992). In outdoor infiltration systems, where biofilms include phototrophs and heterotrophs, the contribution of algae in bioclogging might be also relevant (Gette-Bouvarot et al 2014), since main producers of EPS are both bacteria and algae (Malarkey et al 2015;Hirst et al 2003).…”

Section: Introductionmentioning

confidence: 99%

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A bilayer coarse-fine infiltration system minimizes bioclogging: The relevance of depth-dynamics

Perujo

Romaní

Sánchez-Vila

2019

Science of The Total Environment

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Section: Biofilm Biomass: Content Of Polysaccharides In Epsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

A bilayer coarse-fine infiltration system minimizes bioclogging: The relevance of depth-dynamics

Perujo

Romaní

Sánchez-Vila

2019

Science of The Total Environment

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“…Biofouling is a major problem, with some groundwater recharge schemes, where water is reinjected, or infiltrated, into an aquifer [155].…”

Section: C64 Biofouling Biofilmsmentioning

confidence: 99%

Provision of Desalinated Irrigation Water by the Desalination of Groundwater within a Saline Aquifer

Antia¹

2016

Hydrology

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Irrigated land accounts for 70% of global water usage and 30% of global agricultural production. Forty percent of this water is derived from groundwater. Approximately 20%-30% of the groundwater sources are saline and 20%-50% of global irrigation water is salinized. Salinization reduces crop yields and the number of crop varieties which can be grown on an arable holding. Structured ZVI (zero valent iron, Fe 0 pellets desalinate water by storing the removed ions as halite (NaCl) within their porosity. This allows an "Aquifer Treatment Zone" to be created within an aquifer, (penetrated by a number of wells (containing ZVI pellets)). This zone is used to supply partially desalinated water directly from a saline aquifer. A modeled reconfigured aquifer producing a continuous flow (e.g., 20 m 3 /day, 7300 m 3 /a) of partially desalinated irrigation water is used to illustrate the impact of porosity, permeability, aquifer heterogeneity, abstraction rate, Aquifer Treatment Zone size, aquifer thickness, optional reinjection, leakage and flow bypass on the product water salinity. This desalination approach has no operating costs (other than abstraction costs (and ZVI regeneration)) and may potentially be able to deliver a continuous flow of partially desalinated water (30%-80% NaCl reduction) for $0.05-0.5/m 3 .

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“…In addition, bacteria EPS are made up of protein, polysaccharide, organic acid, and a small amount of DNA. Xia et al [ 17 ] found that the main bacteria that may cause clogging in aquifer recharge were Methylobacterium , Janthinobacterium , Yersinia , Staphylococcus , and Acidovorax . The main components of their EPS are proteins and polysaccharides.…”

Section: Introductionmentioning

confidence: 99%

Extracellular Polymeric Substances Facilitate the Adsorption and Migration of Cu2+ and Cd2+ in Saturated Porous Media

Yang

et al. 2021

Biomolecules

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Heavy metal contamination in groundwater is a serious environmental problem. Many microorganisms that survive in subsurface porous media also produce extracellular polymeric substances (EPS), but little is known about the effect of these EPS on the fate and transport of heavy metals in aquifers. In this study, EPS extracted from soil with a steam method were used to study the adsorption behaviors of Cu2+ and Cd2+, employing quartz sand as a subsurface porous medium. The results showed that EPS had a good adsorption capacity for Cu2+ (13.5 mg/g) and Cd2+ (14.1 mg/g) that can be viewed using the Temkin and Freundlich models, respectively. At a pH value of 6.5 ± 0.1 and a temperature of 20 °C, EPS showed a greater affinity for Cu2+ than for Cd2+. The binding force between EPS and quartz sand was weak. The prior saturation of the sand media with EPS solution can significantly promote the migration of the Cu2+ and Cd2+ in sand columns by 8.8% and 32.1%, respectively. When treating both metals simultaneously, the migration of Cd2+ was found to be greater than that of Cu2+. This also demonstrated that EPS can promote the co-migration of Cu2+ and Cd2+ in saturated porous media.

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Effects of bacterial cells and two types of extracellular polymers on bioclogging of sand columns

Cited by 40 publications

References 57 publications

A bilayer coarse-fine infiltration system minimizes bioclogging: The relevance of depth-dynamics

A bilayer coarse-fine infiltration system minimizes bioclogging: The relevance of depth-dynamics

Provision of Desalinated Irrigation Water by the Desalination of Groundwater within a Saline Aquifer

Extracellular Polymeric Substances Facilitate the Adsorption and Migration of Cu2+ and Cd2+ in Saturated Porous Media

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