Effect of inorganic carbonate and organic matter in thermal treatment of mercury-contaminated soil

Cho, Kanghee; Kang, Jin‐Kyu; Kim, Songbae; Purev, Oyunbileg; Myung, Eunji; Kim, Hyunsoo; Choi, Nag-Choul

doi:10.1007/s11356-021-14024-z

Cited by 13 publications

(9 citation statements)

References 45 publications

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“…The spectrum of the original soil sample exhibited bands at 3696, 3619, and 3421 cm −1 (O-H stretching); 1636 and 1419cm −1 (C=N stretching); 1031, 912, 778, 694, and 534 cm −1 (Si-O stretching); and 470 cm −1 (Fe-O stretching). The Si-O stretching vibration band corresponded to quartz; these quartz bands were prominent in the spectrum of the soil [7]. Furthermore, the peaks at 2917 and 2849 cm −1 were ascribed to the asymmetric C-H stretching vibrations (-CH2 and -CH) in aliphatic hydrocarbons [35], which corresponded to organic matter.…”

Section: Characterization Of Cavitating Flow By Using a Washing Ejectormentioning

confidence: 94%

“…Soils near smelters accumulate contaminants and can be analyzed to investigate the long-term effects of metal contaminants on soils [6]. The accumulation of metals is significantly affected by the contents of organic matter, clay minerals, and Fe oxides in the soil [7]. Generally, fine soil fractions can adsorb more contaminants than coarse soil fractions through various complexation reactions because of their higher surface-to-mass ratios [8].…”

Section: Introductionmentioning

confidence: 99%

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Physical Separation of Contaminated Soil Using a Washing Ejector Based on Hydrodynamic Cavitation

et al. 2021

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A washing ejector is a pre-treatment technology used to remediate contaminated soil by separating fine particles. The washing ejector developed in this study is a device that utilizes fast liquid jets to disperse soil aggregates by cavitation flow. The cavitation phenomenon is affected by the Bernoulli principle, and the liquid pressure decreases with the increase in kinetic energy. The cavitating flow of the fluid through the Ventrui nozzle can remove surface functional groups and discrete particles. The main methodology involves the removal of small particles bound to coarse particles and the dispersion of soil aggregates. Particle collisions occur on the surface soil, such as the metal phase that is weakly bound to silicate minerals. It was observed that the dispersed soil affected the binding of toxic heavy metals and the mineralogical characteristics of the soil. The quantity of oxides, organic matter, and clay minerals affected the properties of the soil. An almost 40–60% removal efficiency of total metals (As, Zn, and Pb) was obtained from the contaminated soils. After treatment by a washing ejector, the volume of fine particles was reduced by 28–47%. When the contaminants are associated with particulates, separation using a washing ejector can be more effective. Therefore, physical separation improves the removal efficiency of heavy metals from soil aggregates.

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Section: Characterization Of Cavitating Flow By Using a Washing Ejectormentioning

confidence: 94%

Section: Introductionmentioning

confidence: 99%

Physical Separation of Contaminated Soil Using a Washing Ejector Based on Hydrodynamic Cavitation

et al. 2021

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“…The absorption band at 874 cm − 1 was assigned to CO 3 . The bands at 1420 and 874 cm − 1 were assigned to the asymmetric stretching and in-plane bending of carbonate in amorphous calcite, respectively (Cho et al, 2021). The peak at 790 cm − 1 was assigned to Si-O.…”

Section: Characterization Of Ac Ballmentioning

confidence: 99%

Aqueous benzene, toluene, ethylbenzene and xylene (BTEX) removal using core-shell structure activated carbon ball as a permeable reactive barrier material

Myung,

Kim,

Choi

et al. 2024

Preprint

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Permeable reactive barriers (PRBs) are passive and sustainable treatment systems for remediating the diffusion of contaminant plumes in groundwater. Several conventional reactive materials such as activated carbon (AC) have long been used as reactive media for PRBs. AC, which is known for its high adsorption capability and cost-effectiveness, is commonly used to remove multiple pollutants from groundwater. Unfortunately, among the reactive materials, AC can fill in the barrier and pose practical problems, such as a pressure drop, solid losses during handling, and safe disposal of filled sorbents, because of its low particle strength. In this study, AC balls were prepared using zeolite as the core and powdered AC, quartz, and calcite as the shell. AC ball with excellent mechanical strength and high permeability properties in the form of a core–shell layer is a good alternative to conventional reactive materials. The adsorption characteristics of benzene, toluene, ethylbenzene, and p-xylene (BTEX) from solutions using AC balls were investigated. The adsorption equilibrium is in the order of X > E > T > B. To validate the proposed models, batch experiments indicated that the pseudo-2nd-order and Langmuir models were the most suitable for describing the kinetics and equilibrium of benzene and toluene, respectively. Regeneration experiments were performed using chemical extraction (methanol) and microwave (MW) heating. MW heating is a promising alternative regeneration technique for AC balls. A series of experiments (six adsorption–desorption cycles) revealed that AC balls have considerable reusability. Based on these results, AC balls are a potential reactive medium for field-scale PRB practical remediation applications.

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“…It has been proven that when the temperature drops below 200 0 C, the effectiveness of remediation is significantly reduced, since the complete decomposition of pesticides does not occur. At the same time, when the temperature rises above 350 0 C, soil degradation and loss of nutrients can be observed, so it is necessary to choose the optimal temperature taking into account these factors [4].…”

Section: Introductionmentioning

confidence: 99%

“…Studies show that heat treatment can lead to changes in soil structure, depending on the type and duration of treatment. In addition, a change in soil pH is possible due to a decrease in the content of organic matter and water, as well as an effect on the content of organic matter and other elements that are important for plant development and human health [4,8].…”

Section: Introductionmentioning

confidence: 99%

Thermal Treatment as a Method of Remediation of Soil Contaminated With Pesticides

Phorostianenko,

Petruk

2023

PEI

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Thermal treatment of pesticide-contaminated soil is one of the effective methods of purifying soil from harmful pollution. Since pesticides have a harmful effect on humans and the environment, especially if they enter the body through food, there is a need to reduce their amount in the soil. Thermal treatment of soil contaminated with pesticides consists in raising the temperature of the soil to a certain level, which allows the destruction of pesticides and other harmful substances. The purpose of this work is to analyze the results of previously conducted studies using high-temperature processing and their conclusions regarding the effectiveness of the method. The review of research was conducted on the basis of the criteria for the effectiveness of thermal treatment and its potential use for the remediation of pesticide-contaminated soils. Recent research shows that thermal treatment of pesticide-contaminated soil can be a self- sufficient and simple method of soil purification. However, further research is needed in this area to improve methodology, techniques and environmental safety development regarding post-procedural soil behavior and waste disposal. All this can help in further work on solving the problems of soil pollution and help preserve the health of people and ecosystems. It has been established that heat treatment is one of the most effective methods of remediation of soil contaminated with pesticides. It allows you to reduce the level of pollution by a significant amount after just one application of this method. However, before using the treatment, it is necessary to study in detail all possible factors affecting the effectiveness of the method, including temperature, duration of treatment, type of soil and others. Various methods of heat treatment, their effectiveness and possibilities of use in real conditions were analyzed. The main factors affecting the effectiveness of the method, as well as various options for the application of heat treatment, depending on the type of soil and the level of contamination, were also investigated.

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Effect of inorganic carbonate and organic matter in thermal treatment of mercury-contaminated soil

Cited by 13 publications

References 45 publications

Physical Separation of Contaminated Soil Using a Washing Ejector Based on Hydrodynamic Cavitation

Physical Separation of Contaminated Soil Using a Washing Ejector Based on Hydrodynamic Cavitation

Aqueous benzene, toluene, ethylbenzene and xylene (BTEX) removal using core-shell structure activated carbon ball as a permeable reactive barrier material

Thermal Treatment as a Method of Remediation of Soil Contaminated With Pesticides

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