Co-transport of Pb (II) and Cd (II) in saturated porous media: effects of colloids, flow rate and grain size

Xie, Bingyi; Jiang, Yanji; Zhang, Zhe; Cao, Gang; Sun, Huimin; Wang, Nong; Wang, Shengsen

doi:10.1080/09542299.2018.1531727

Cited by 24 publications

(5 citation statements)

References 40 publications

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“…Contaminant transport in soil occurs not only in dissolved form but also in association with moving colloids. This mechanism of contaminant migration has been reported for numerous contaminants in the literature, including heavy metals [22,140,141], pesticides [142,143], and pharmaceuticals [33,144,145]. Colloid-associated contaminants may migrate at a rate faster than the non-sorbing tracer [146], which contributes an essential pathway for rapid contaminant transport, especially for highly sorbing organic contaminants in natural soil and groundwater [22,34,[147][148][149].…”

Section: Colloid-facilitated Contaminant Transport Modelsmentioning

confidence: 77%

Transport of Veterinary Antibiotics in Farmland Soil: Effects of Dissolved Organic Matter

Gbadegesin

Tang

Liu

et al. 2022

IJERPH

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The application of manure as a fertiliser to farmland is regarded as a major source of veterinary antibiotic (VA) contamination in the environment. The frequent detection of such emerging contaminants and their potential adverse impacts on the ecosystem and human health have provoked increasing concern for VA transport and fate. Extrinsic dissolved organic matter (DOM) may be introduced into farmland soil along with Vas, and thus exert significant effects on the transport of VAs via hydrological processes upon rainfall. The leaching of VAs can be either enhanced or reduced by DOM, depending on the nature, mobility, and interactions of VAs with DOM of different origins. From the aspect of the diversity and reactivity of DOM, the state-of-the-art knowledge of DOM−VA interactions and their resulting effects on the sorption−desorption and leaching of VAs in farmland soil was reviewed. Spectroscopic techniques for examining the extent of binding and reactive components of DOM with VAs are summarized and their usefulness is highlighted. Models for simulating VA transport under the effects of DOM were also reviewed. It is suggested that distinct impacts of DOM of various organic fertiliser/amendment origins should be considered for predicting the transport of VAs in farmland soil.

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Section: Colloid-facilitated Contaminant Transport Modelsmentioning

confidence: 77%

Transport of Veterinary Antibiotics in Farmland Soil: Effects of Dissolved Organic Matter

Gbadegesin

Tang

Liu

et al. 2022

IJERPH

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“…Consequently, to understand the risk of Cu in groundwater, it is important to study how mineral colloids and HA influence the transport of Cu. It was found that mineral colloids such as HA can promote the migration of adsorbed heavy metals in groundwater, which acts as mobile media, 9 through carboxyl, phenol, and other groups present in HA that promotes the transportation of heavy metals in groundwater 10–12 . Many researches show that there is correlation among heavy metals, colloids, and HA 13–16 .…”

Section: Introductionmentioning

confidence: 99%

“…It was found that mineral colloids such as HA can promote the migration of adsorbed heavy metals in groundwater, which acts as mobile media, 9 through carboxyl, phenol, and other groups present in HA that promotes the transportation of heavy metals in groundwater. [10][11][12] Many researches show that there is correlation among heavy metals, colloids, and HA. [13][14][15][16] However, far too little attention has been paid to the interrelations among Cu, colloids, and HA in groundwater, including co-transport and release.…”

mentioning

confidence: 99%

Effects of humic acid and kaolinite on copper transport in water‐saturated porous media

Meng

Xue

Jiang

et al. 2022

Env Prog and Sustain Energy

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Mobile organic macromolecules and inorganic particles may act as carriers of strongly sorbing contaminants in subsurface materials, posing a potential facilitated transport risk. This study examined the influence of humic acid (HA) and kaolinite colloid on copper ion transport in saturated porous media. Column experiments were conducted to investigate the migration behavior and interactions of HA, kaolinite and copper under different experimental conditions in saturated porous media. The results showed that the individual presence of HA promoted the transport of Cu. However, the mixture of kaolinite and HA has less effect on Cu migration than HA alone. The presence of Cu reduced the mobility of kaolinite through the saturated porous media sand column by increasing the deposition rate of kaolinite. The transport of kaolinite increased significantly in the presence of HA, while kaolinite slightly decreased HA transport in the sand column. Compared with kaolinite, HA has a stronger ability to desorb copper from copper-bearing sand. Considering the presence of kaolinite and HA, this study provides a reference for the fate, migration and risk assessment of heavy metal pollutants.

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“…The retention and accumulation of NZVI onto different types of soils thus have attracted much research interest [16][17][18][19]. A large number of literature has reported that the adsorbed NZVI particles can be coalesced in soils and gradually lose their activities [20][21][22][23]. In addition, there are also a few studies reporting the release of NZVI particles from sludge [24][25][26][27][28].…”

Section: Introductionmentioning

confidence: 99%

Adsorption, transformation, and colloid-facilitated transport of nano-zero-valent iron in soils

Zhang

et al. 2019

Environmental Pollutants and Bioavailability

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Because of its unique reductive properties, nanoscale zero-valent iron (NZVI) has been widely used in soil and groundwater remediation. It is crucial to understand the fate of NZVI in soils. In this work, a range of laboratory experiments was conducted to examine the adsorption, transformation, and transport of NZVI. The NZVI particles showed relatively strong sorption onto vertic shajiang-aquic cambosols, typic-hapli-udic argosols and typic ochri-aquic cambosols and isotherms can be well described by the Langmuir model. When cultivated in the soils, the NZVI was oxidized within seven days and the particle size also increased with average size reaching around 100 nm at 28 days. Columns were packed with quartz sand, sandy soil and diatomite as saturated porous media to evaluate the role of soil colloids in affecting the transport of NZVI. The results showed that NZVI transport in the columns was strongly affected by medium types, dispersion agent types, and soil colloids. Comparisons of breakthrough curves of different types of dispersed NZVI and corresponding colloid-NZVI revealed that natural soil colloids facilitated NZVI transport in porous media. Findings from this work can provide useful information to better evaluate the applications and impacts of NZVI as an environmental remediation agent.

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Co-transport of Pb (II) and Cd (II) in saturated porous media: effects of colloids, flow rate and grain size

Cited by 24 publications

References 40 publications

Transport of Veterinary Antibiotics in Farmland Soil: Effects of Dissolved Organic Matter

Transport of Veterinary Antibiotics in Farmland Soil: Effects of Dissolved Organic Matter

Effects of humic acid and kaolinite on copper transport in water‐saturated porous media

Adsorption, transformation, and colloid-facilitated transport of nano-zero-valent iron in soils

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