Impacts of salinity level and flood irrigation on Cd mobility through a Cd-contaminated soil, Thailand: experimental and modeling techniques

Waleeittikul, Athiya; Chotpantarat, Srilert; Ong, Say Kee

doi:10.1007/s11368-018-2207-9

Cited by 18 publications

(3 citation statements)

References 52 publications

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“…It may also be said that Freundlich's model adjusts better for Cu than Cd data. Waleeittikul et al (2019), in the investigation of the effect of salinity levels in the Cd sorption in sandy loam soils, observed that, for all salinity levels, the sorption was well explained by the Freundlich isotherm. Similarly, this isothermal model fit the adsorption characteristics for Zn, Cd, Cu and Pb, alone or as a mixture, in different soils classified as loam, clay, silty clay and clay (Mouni et al, 2017).…”

Section: Sorption Isothermsmentioning

confidence: 93%

Sorption studies of Cd and Cu on Brazilian alluvial soils

Barros¹,

Coutinho²,

Alves³

et al. 2021

Rev. ambiente água

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The Local Production Arrangement, located in the Pernambuco’s Agreste state, has been significantly developing the region's economy. Despite its importance, industrial activity has caused relevant environmental concerns regarding the disposal of textile effluents, especially from industrial laundries. This waste is made up of many chemicals, and among them are various types of heavy metals. The evaluation of the sorption behavior of contaminant transport mechanisms such as heavy metals is essential to assess the risk of contamination of alluvial aquifers. This study evaluated the sorption of heavy metals (Cu and Cd) in an alluvial sediment deposit in the Capibaribe River. Kinetics and isotherm experiments allowed the analyses of Cu and Cd sorption. Kinetics sorption showed an equilibrium tendency after 16 h for Cu and 18 h for Cd and was better described by a pseudo-second order model. The isotherm data were adjusted to the Linear, Freundlich and Langmuir models. Both linear and Freundlich models satisfactorily described sorption isotherms for the two pollutants. The metals in the study represent a risk of contamination of the groundwater of alluvial aquifers, mainly due to physicochemical attributes of the soil, such as high sand content (85%), low MO (2.1 g kg-1) and alkaline pH (8.2). The environmental conditions decrease absorption and facilitate metal mobility, greatly increasing the environmental risks inherent in pollutant leaching. Cu showed a higher affinity with the soil studied in all assays performed compared with the results of the tests for Cd.

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Section: Sorption Isothermsmentioning

confidence: 93%

Sorption studies of Cd and Cu on Brazilian alluvial soils

Barros¹,

Coutinho²,

Alves³

et al. 2021

Rev. ambiente água

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“…At the same time, there is a sorption–desorption coupling between the concentration of solute in the soil solution and the concentration of solute adsorbed by the soil matrix. This is mainly influenced by the exchange properties of the soil and the interaction of several types of solutes, governed by Equation (4) 41 where S is the solute solid-phase adsorption concentration, in g/g; c is the solute liquid-phase adsorption concentration, in g/g; ks is the distribution coefficient and β and η are empirical parameters. Based on the available literature, 42–44 the problem of soil solute solid-phase adsorption has been studied by many researchers.…”

Section: Methodsmentioning

confidence: 99%

Preservation of earthen relic sites against salt damages by using a sand layer

Chang

Wen

Yu³

et al. 2022

Indoor and Built Environment

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Salt damage is one of the main problems facing the preservation of earthen sites in heritage museums. The use of salt-inhibiting materials on the surface of earthen sites to prevent damages could cause secondary damage. A method of placing a sand layer as a water and salt barrier was introduced and evaluated based on the law of unsaturated soil water and salt transport. The method involves placing a sand layer on the lower layer of the earthen site to inhibit the migration of water and salt from the deep soil to the surface of the earthen site. Experiments and numerical simulations were conducted to study the long-term effect and efficiency of water and salt barrier of sand layers with different particle sizes. The results show that the sand layer could successfully block the continuous upwards transport of water. The salt was shown to stagnate at the boundary between the bottom of the sand layer and the experimental soil. According to the simulation results, the water and salt barrier effect of the sand layer is proportional to the particle size of the sand layer. The sand layer with particle sizes much larger than the experimental soil has a durable water and salt barrier effect. These results are important for understanding the mechanism of salt damage to earthen sites and for the sustainable preservation of relics against salt damage in a soil environment.

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“…Moreover, each column was treated with a similar average linear velocity of 2.30 m/day. Our previous study 35 used columns prepared with the same technique, the so-called wet packing method [36][37][38] , and the dispersivity of each column (~1.07 cm) was quite similar. Furthermore, to assure the reproducibility of the column experiment, another previous study 39 duplicated the column test, performed with the wet packing technique, to investigate Ni and Pb transport; the retardation factor (RF) and sorbed metal values in the duplicate columns provided similar results.…”

Section: Methodsmentioning

confidence: 99%

Influences of pH on transport of arsenate (As5+) through different reactive media using column experiments and transport modeling

Chotpantarat

Amasvata

2020

Sci Rep

Self Cite

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This research aims to evaluate the effects of pH, including both acidic and neutral conditions to simulate an acid mine environment, on the sorption and transport of As(V) in contaminated groundwater through different reactive materials by using column experiments and mathematical modeling. Six saturated columns were set up to evaluate the migration and removal efficiency of As(V) with three different materials acting as permeable reactive barrier (PRB) media under different pH conditions (pH 4 and pH 7). The reactive materials consisted of pure sand (control column), iron oxide-coated sand (IOCS) and a combination of IOCS and zero-valent iron-coated sand (ZVICS) (ZVICS + IOCS). According to the column experiments, the descending order of removal capacity (mg As/g) for ZVICS + IOCS, IOCS and sand was 0.452 > 0.062 > 0.0027 mg As/g at pH 4 and 0.117 > 0.0077 > 0.0022 mg As/g, respectively, at pH 7. The column experiments showed that the removal and retardation factor (RF) of As(V) generally increased with decreasing pH. The SEM images and the corresponding EDX spectra of acid-washed natural sand, IOCS and ZVICS + IOCS from the columns showed that the peak of As was detectable on the reactive materials. The mechanism of As(V) sorption onto sand at pH 4 and pH 7 corresponded to the uniform (equilibrium) solute transport model, whereas the IOCS and ZVICS + IOCS columns corresponded to the two-site model (TSM) with the Freundlich isotherm. The fraction of instantaneous sites (f) for As(V) sorption onto IOCS and ZVICS + IOCS appeared to decrease with increasing pH, especially for ZVICS + IOCS, which indicates that nonequilibrium sorption/desorption mainly dominated during As(V) migration.Arsenic (As) can contaminate the environment via natural processes (e.g., erosion and weathering processes of soils, minerals, and ores) and human activities (e.g., mining activities, combustion of fossil fuels, and use of pesticides and herbicides) 1 . Arsenic is often found at elevated concentrations in groundwater. Its occurrence in groundwater depends on the types of rock and soil in the area. Regarding the increased concentrations of As in natural groundwater, there are many areas in the world, including some areas in Thailand, where As is found in higher concentrations than the World Health Organization (WHO) guideline of 10 μg/L 2 . For example, Choprapawon et al. 3 has studied the impact of As for decades in the Ronpibool District, Nakorn Sri Thammarat, the Southern province of Thailand. The provincial administrative organization and the inhabitants of this district have recognized the harmful effects of As contamination in natural water sources in Ronpibool District for more than 10 years. Moreover, villagers who live near the area surrounding gold mines in the Wangsaphung District, Loei province, Thailand, complained in 2006 about contamination of As and found significant high levels of As in soils, water and plants near the gold mine area 4 . This has become a serious issue because groundwater has been increasingly used for ...

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Impacts of salinity level and flood irrigation on Cd mobility through a Cd-contaminated soil, Thailand: experimental and modeling techniques

Cited by 18 publications

References 52 publications

Sorption studies of Cd and Cu on Brazilian alluvial soils

Sorption studies of Cd and Cu on Brazilian alluvial soils

Preservation of earthen relic sites against salt damages by using a sand layer

Influences of pH on transport of arsenate (As5+) through different reactive media using column experiments and transport modeling

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