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]

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

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

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

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

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 R_f (R_fTM-1 = 13.97, R_fTS-1 = 12.89) of Mn²⁺ is derived from thermodynamic principles.

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No potential conflict of interest was reported by the authors.

Funding

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

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Simulation of magnesium chloride vertical transport in column experiments

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Simulation of magnesium chloride vertical transport in column experiments

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