Co-transport of Cr(VI) and Bentonite Colloid in Saturated Porous Media

Xinfeng Gu; Huijing Mo; Lei Wang; Lianyi Zhang; Zhuhong Ding

doi:10.1007/s00128-022-03675-4

Co-transport of Cr(VI) and Bentonite Colloid in Saturated Porous Media

Xinfeng Gu, Huijing Mo, Lei Wang, Lianyi Zhang, Zhuhong Ding

School of Environmental Science and Engineering

Nanjing Tech University

Research output: Contribution to journal › Article › peer-review

6 Scopus citations

Abstract

Transport of Cr(VI) at the presence of bentonite colloid was carried out in saturated porous media of 16–18 mesh and 40–60 mesh sand columns. Effects of flow rate, pH, ion strength, humic acid and bentonite concentrations on Cr(VI) migration were investigated. The results show that the increase of flow rate accelerated the breakthrough of Cr(VI) and BP, but the transport mass of dissolved Cr(VI) decreased by ~ 15.0% when flow rate increased to 2.5 ml min⁻¹. Increasing IS to 10mM resulted in decrease of Cr(VI) transport mass by 6.86%–21.4%. Increase of pH and decrease of bentonite concentration favored the transport of dissolved Cr(VI). Humic acid had little effect on transport amount of Cr at pH7. Cr(VI) transport was dominated by the dissolved Cr(VI). The transport data of dissolved Cr(VI) were well described by the two-site model. The presence of BP reduced total Cr(VI) transport mass in co-transport.

Original language	English
Article number	30
Journal	Bulletin of Environmental Contamination and Toxicology
Volume	110
Issue number	1
DOIs	https://doi.org/10.1007/s00128-022-03675-4
State	Published - Jan 2023

Keywords

Bentonite
Cr(VI)
Hydrochemical parameters
Transport

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10.1007/s00128-022-03675-4

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title = "Co-transport of Cr(VI) and Bentonite Colloid in Saturated Porous Media",

abstract = "Transport of Cr(VI) at the presence of bentonite colloid was carried out in saturated porous media of 16–18 mesh and 40–60 mesh sand columns. Effects of flow rate, pH, ion strength, humic acid and bentonite concentrations on Cr(VI) migration were investigated. The results show that the increase of flow rate accelerated the breakthrough of Cr(VI) and BP, but the transport mass of dissolved Cr(VI) decreased by ~ 15.0% when flow rate increased to 2.5 ml min−1. Increasing IS to 10mM resulted in decrease of Cr(VI) transport mass by 6.86%–21.4%. Increase of pH and decrease of bentonite concentration favored the transport of dissolved Cr(VI). Humic acid had little effect on transport amount of Cr at pH7. Cr(VI) transport was dominated by the dissolved Cr(VI). The transport data of dissolved Cr(VI) were well described by the two-site model. The presence of BP reduced total Cr(VI) transport mass in co-transport.",

keywords = "Bentonite, Cr(VI), Hydrochemical parameters, Transport",

author = "Xinfeng Gu and Huijing Mo and Lei Wang and Lianyi Zhang and Zhuhong Ding",

note = "Publisher Copyright: {\textcopyright} 2022, The Author(s), under exclusive licence to Springer Science+Business Media, LLC, part of Springer Nature.",

year = "2023",

month = jan,

doi = "10.1007/s00128-022-03675-4",

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volume = "110",

journal = "Bulletin of Environmental Contamination and Toxicology",

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T1 - Co-transport of Cr(VI) and Bentonite Colloid in Saturated Porous Media

AU - Gu, Xinfeng

AU - Mo, Huijing

AU - Wang, Lei

AU - Zhang, Lianyi

AU - Ding, Zhuhong

PY - 2023/1

Y1 - 2023/1

N2 - Transport of Cr(VI) at the presence of bentonite colloid was carried out in saturated porous media of 16–18 mesh and 40–60 mesh sand columns. Effects of flow rate, pH, ion strength, humic acid and bentonite concentrations on Cr(VI) migration were investigated. The results show that the increase of flow rate accelerated the breakthrough of Cr(VI) and BP, but the transport mass of dissolved Cr(VI) decreased by ~ 15.0% when flow rate increased to 2.5 ml min−1. Increasing IS to 10mM resulted in decrease of Cr(VI) transport mass by 6.86%–21.4%. Increase of pH and decrease of bentonite concentration favored the transport of dissolved Cr(VI). Humic acid had little effect on transport amount of Cr at pH7. Cr(VI) transport was dominated by the dissolved Cr(VI). The transport data of dissolved Cr(VI) were well described by the two-site model. The presence of BP reduced total Cr(VI) transport mass in co-transport.

AB - Transport of Cr(VI) at the presence of bentonite colloid was carried out in saturated porous media of 16–18 mesh and 40–60 mesh sand columns. Effects of flow rate, pH, ion strength, humic acid and bentonite concentrations on Cr(VI) migration were investigated. The results show that the increase of flow rate accelerated the breakthrough of Cr(VI) and BP, but the transport mass of dissolved Cr(VI) decreased by ~ 15.0% when flow rate increased to 2.5 ml min−1. Increasing IS to 10mM resulted in decrease of Cr(VI) transport mass by 6.86%–21.4%. Increase of pH and decrease of bentonite concentration favored the transport of dissolved Cr(VI). Humic acid had little effect on transport amount of Cr at pH7. Cr(VI) transport was dominated by the dissolved Cr(VI). The transport data of dissolved Cr(VI) were well described by the two-site model. The presence of BP reduced total Cr(VI) transport mass in co-transport.

KW - Bentonite

KW - Cr(VI)

KW - Hydrochemical parameters

KW - Transport

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U2 - 10.1007/s00128-022-03675-4

DO - 10.1007/s00128-022-03675-4

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AN - SCOPUS:85145242307

SN - 0007-4861

VL - 110

JO - Bulletin of Environmental Contamination and Toxicology

JF - Bulletin of Environmental Contamination and Toxicology

IS - 1

M1 - 30

ER -

Co-transport of Cr(VI) and Bentonite Colloid in Saturated Porous Media

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