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Human and Ecological Risk Assessment: An International Journal Volume 26, 2020 - Issue 9
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Simulation of magnesium chloride vertical transport in column experiments

Yan DouSchool of Water and Environment, Chang’an University, Xi’an, Shaanxi, P.R. China; ;Key Laboratory of Subsurface Hydrology and Ecological Effects in Arid Areas of the Ministry of Education, Chang’an University, Xi’an, Shaanxi, P.R. China Correspondence[email protected]
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Mengyao LiSchool of Water and Environment, Chang’an University, Xi’an, Shaanxi, P.R. China; ;Key Laboratory of Subsurface Hydrology and Ecological Effects in Arid Areas of the Ministry of Education, Chang’an University, Xi’an, Shaanxi, P.R. China 
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Zhaoyu LiuSchool of Water and Environment, Chang’an University, Xi’an, Shaanxi, P.R. China; ;Key Laboratory of Subsurface Hydrology and Ecological Effects in Arid Areas of the Ministry of Education, Chang’an University, Xi’an, Shaanxi, P.R. China 
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Renjie FangSchool of Water and Environment, Chang’an University, Xi’an, Shaanxi, P.R. China; ;Key Laboratory of Subsurface Hydrology and Ecological Effects in Arid Areas of the Ministry of Education, Chang’an University, Xi’an, Shaanxi, P.R. China 
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Kaixi YanSchool of Water and Environment, Chang’an University, Xi’an, Shaanxi, P.R. China; ;Key Laboratory of Subsurface Hydrology and Ecological Effects in Arid Areas of the Ministry of Education, Chang’an University, Xi’an, Shaanxi, P.R. China 
Pages 2407-2419 | Received 15 Mar 2020, Accepted 12 Jun 2020, Published online: 07 Jul 2020
 
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Abstract

The transport characteristics of manganese was investigated by soil columns experiments and provide essential data for aquifer remediation and groundwater protection in Yinchuan City. Soil column experiments involved a solution of manganese chloride in which the chloride ion was the chemical tracer. In the two column experiments, the breakthrough curve (BTC) for Cl– revealed the average linear flow velocity (2.937 and 3.921 cm/h) and longitudinal dispersivity (8.52 and 40.09 cm) of the sediment. The BTC of Mn2+ showed a significant delay compared to Cl–. The adsorptive equilibrium isotherm experiments showed that Ca2+ was the main desorption cation in the cation exchange process. The nonlinear retardation factor Rf (RfTM-1 = 13.97, RfTS-1 = 12.89) of Mn2+ is derived from thermodynamic principles.

Disclosure statement

No potential conflict of interest was reported by the authors. 

Funding

The authors acknowledge financial support from (Program No: S201910710257).

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