محصول

A review for recent advances on soil washing remediation

To have high sustainability, the removal capacity of the washing agents should be also important. The deep eutectic solvent mixed with choline chloride and …

كوبي اولیه برای مرحله خوب مخرب، regrinding، و به عنوان مرحله…

Removal of arsenic and cadmium with sequential soil washing …

Soil washing with the use of a single washing agent was not effective in remediating soil samples for both of the target metals. Removal efficiency of arsenic was very low (<5%) for the first-step of Na 2 EDTA washing, even using a relatively high concentration, for its ineffectiveness in removing anionic metal form (Tokunaga and …

كوبي اولیه برای مرحله خوب مخرب، regrinding، و به عنوان مرحله…

Soil-washing technologies in Europe (Journal Article) | OSTI.GOV

Currently, it must be followed by some soil treatment because direct deposition in a nuclear repository is too expensive to be an economical solution. On-site …

كوبي اولیه برای مرحله خوب مخرب، regrinding، و به عنوان مرحله…

Soil Washing – Remediation of contaminated sites

Posted on: 15 July 2021. Soil Washing is a technique for the remediation of contaminated soil, through a process of physical separation of the pollutant and the recovery of the valuable part of the treated material. The technique consists in washing the contaminated soil with water, aqueous solutions of surfactants, biosurfactants or organic ...

كوبي اولیه برای مرحله خوب مخرب، regrinding، و به عنوان مرحله…

Calibration and Validation of a Two-Step Kinetic

The kinetic trend for Cu extraction from contaminated soil through ethylenediamine-N,N′-disuccinic acid (EDDS)-enhanced soil washing is investigated. Long-term tests are conducted over 96 h at five different values of EDDS-Cu (M) molar ratio (mol/mol) and five different values of liquid-to-soil (L/S) ratio (v/w). The overall Cu …

كوبي اولیه برای مرحله خوب مخرب، regrinding، و به عنوان مرحله…

IJERPH | Free Full-Text | Effect of Soil Washing Solutions on

In this study, we investigated the feasibility of using a solution of sulfuric acid and phosphoric acid as an extraction method for soil-washing to remove Cu, Pb, Zn, and As from contaminated soil. We treated various soil particles, including seven fraction sizes, using sulfuric acid. In addition, to improve Cu, Pb, Zn, and As removal efficiencies, …

كوبي اولیه برای مرحله خوب مخرب، regrinding، و به عنوان مرحله…

Combined effects of soil particle size with washing time and soil-to

Soil-to-liquid ratio is another parameter influencing soil washing efficiency. The ratio used was site specific in some cases, but it is most often applied without proper consideration. A wide range of solid/liquid ratios (1:1 to 1:100) have been reported for soil washing (Mousset et al., 2014). Five different washing ratios are mentioned in ...

كوبي اولیه برای مرحله خوب مخرب، regrinding، و به عنوان مرحله…

Sustainability | Free Full-Text | Remediation of Sb-Contaminated Soil

In comparison with other remediation approaches, soil washing is an efficient way of treating metal-polluted soil since it can permanently and swiftly extract metals from the soil [17,18]. Serafimovska et al. [ 19 ] applied a four-step sequential extraction procedure (BCR) to analyze the species composition of Sb in soil …

كوبي اولیه برای مرحله خوب مخرب، regrinding، و به عنوان مرحله…

Soil Flushing

Soil-washing (solvent extraction) Soil-washing is a solvent-extraction process. It uses the difference in the solubility of petroleum and the soil in water as the driving force. First, contaminated soils are usually excavated (although in situ soil flushing systems do exist) and the soil screened to remove large rocks and materials. If there ...

كوبي اولیه برای مرحله خوب مخرب، regrinding، و به عنوان مرحله…

SOIL WASHING TREATMENT

from soils through soil washing applications. Removal efficiencies depend on the type of contaminant as well as the type of soil. Volatile organic contaminants often are easily …

كوبي اولیه برای مرحله خوب مخرب، regrinding، و به عنوان مرحله…

4-19 Soil Washing

Description: Figure 4-19: Typical Soil Washing Process Ex situ soil separation processes (often referred to as "soil washing"), mostly based on mineral processing techniques, are widely used in Northern Europe and America for the treatment of contaminated soil. Soil washing is a water-based process for scrubbing soils ex situ to remove contaminants.

كوبي اولیه برای مرحله خوب مخرب، regrinding، و به عنوان مرحله…

Remediation of iron oxide bound Pb and Pb-contaminated soils …

Soil washing is an efficient, rapid, and cost-effective remediation technique to dissolve target pollutants from contaminated soil. Here we studied the effects of leaching agents: hydrochloric acid (HCl), ethylenediamine tetraacetic acid disodium salt (Na 2 EDTA) and citric acid (CA), and reductants: hydroxylamine hydrochloride (NH 2 OH·HCl) and L …

كوبي اولیه برای مرحله خوب مخرب، regrinding، و به عنوان مرحله…

Version 1.1/03.10

The quantity of soil applied to tiles or another substrate shall be the same for each tile or substrate-part, weighed in grams to one decimal point (within a tolerance ± 0,5g). The test must be capable of generating results that provide a measure of the cleaning performance according to the product tested. Cleaning performance can be measured

كوبي اولیه برای مرحله خوب مخرب، regrinding، و به عنوان مرحله…

Enhancing Soil Remediation of Copper-Contaminated Soil through Washing

The results showed that a single washing with HS solution achieved an optimal removal efficiency of 37.5% for Cu in soil, with a subsequent reuse achieving a removal efficiency of over 30.5%. To further enhance Cu removal efficiency, a two-step soil washing approach using a chemical reductant NH2OH·HCl coupled with an HS …

كوبي اولیه برای مرحله خوب مخرب، regrinding، و به عنوان مرحله…

Full article: Remediation of soils contaminated with total …

In Europe, the main sources of contamination are related to the inappropriate use and disposal of waste (38.1%), industrial and commercial activities ... Despite the undeniable efficiency of soil washing, the high costs of this process require the optimization of the operating conditions as a crucial step for its implementation [Citation 30].

كوبي اولیه برای مرحله خوب مخرب، regrinding، و به عنوان مرحله…

sbm/sbm soil washing efficiency europe.md at master

You can not select more than 25 topics Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.

كوبي اولیه برای مرحله خوب مخرب، regrinding، و به عنوان مرحله…

A critical review on soil washing during soil remediation for heavy

كوبي اولیه برای مرحله خوب مخرب، regrinding، و به عنوان مرحله…

Remediation of petroleum hydrocarbons-contaminated soil

In Europe, 45% of natural soil are polluted by PHs and their derivatives (Borowik and Wyszkowska, 2018). ... The influence of bioaugmentation and biosurfactant addition on bioremediation efficiency of diesel-oil contaminated soil: feasibility during field studies ... Removal of hydrophobic organic pollutants from soil washing/flushing …

كوبي اولیه برای مرحله خوب مخرب، regrinding، و به عنوان مرحله…

An evaluation of different soil washing solutions for remediating

The soil samples were then sieved through a 2 mm mesh and thoroughly mixed. The prepared soil samples were stored before sample characterization and soil washing tests. The concentrations of arsenic, Al, Effect of different soil washing solutions on arsenic removal. Fig. 1 shows the arsenic extraction efficiency for different washing …

كوبي اولیه برای مرحله خوب مخرب، regrinding، و به عنوان مرحله…

Remediation of Heavy Metal-Contaminated Soils with Soil …

In situ soil washing is also named soil flushing, and the procedure of in situ washing is shown in Figure 2 [14]. Makino et al. [15] applied the in situ technology for Cd-contaminated ... caused an environmental risk. Moreover, the washing efficiency was significantly influenced by soil permeability. Porous and permeable soil with hydraulic ...

كوبي اولیه برای مرحله خوب مخرب، regrinding، و به عنوان مرحله…

The efficacy of soil washing for the remediation of per- and poly

Long-chain compounds, especially >C 8, were the most resistant to leaching from the untreated soil and this is consistent with the results showing poorer soil washing efficiency for these compounds (Fig. 2) and with previous studies on desorption of PFASs from AFFF-contaminated soils (Kabiri et al., 2021, Kabiri et al., 2022, Kabiri and ...

كوبي اولیه برای مرحله خوب مخرب، regrinding، و به عنوان مرحله…

Soil washing for the remediation of dioxin-contaminated soil: A …

Soil washing (removal efficiency 66–99%) is a promising remediation technology for dioxin-contaminated soil. This review aims at summarizing critical information about soil washing treatment of dioxin-contaminated soil (e.g. current status of dioxin contamination in soil, description, advantages and limitations of current washing …

كوبي اولیه برای مرحله خوب مخرب، regrinding، و به عنوان مرحله…

Suitability of environmental indices in assessment of soil

The efficiency of metals removal via soil washing in batch and dynamic conditions can vary widely. The efficiency of washing at the level of 70–80% is considered to be substantial.

كوبي اولیه برای مرحله خوب مخرب، regrinding، و به عنوان مرحله…

Remediation of lead-contaminated soil by washing with choline …

Considering washing efficiency and consumption under optimal washing conditions, i.e. the soil/liquid (S/L) ratio of 1:20 and washing time of 48 h, the rates of Cd, Pb and As removal were 79.93%, 69.84% and 61.55%, respectively. ... The use of chelating agents in soil washing has been known to be an efficient, eco–friendly, and …

كوبي اولیه برای مرحله خوب مخرب، regrinding، و به عنوان مرحله…

Soil washing with biodegradable chelating agents and EDTA

Abstract. In washing soils contaminated with toxic metals, the replacement of recalcitrant EDTA with biodegradable chelators has gained high expectations. Herein we investigated the feasibility of using EDTA and biodegradable GLDA, EDDS and IDS under conditions pertinent to operational remediation technology, in a pilot-scale experiment.

كوبي اولیه برای مرحله خوب مخرب، regrinding، و به عنوان مرحله…

Effect of concentration on soil washing efficiency (volume 1 L

Ahn et al. [18] also evaluated the speciation of F in the soil using the sequential extraction method and reported that the residual F fraction increased from 80.5% before soil washing to 98.9% ...

كوبي اولیه برای مرحله خوب مخرب، regrinding، و به عنوان مرحله…

Integrated soil washing and bioreactor systems for the treatment …

A total of 450,000 tons of lindane was utilized globally between 1950 and 2000 period mainly by Europe (63%) followed by Asia (17%), and the United States. ... Furthermore, we briefly discuss the operational and environmental factors affecting soil washing efficiency and soil and surfactant properties affecting surfactant adsorption. …

كوبي اولیه برای مرحله خوب مخرب، regrinding، و به عنوان مرحله…

Demonstration gardens with EDTA-washed soil. Part III: Plant …

The applied soil washing method was similar to the current ReSoil® technology and already included intensive soil rinsing, EDTA and process water recycling. A high dose of EDTA (120 mmol kg −1 ) removed on average 70% of Pb and 58% of Cd and reduced Pb and Cd plant uptake by up to 10 and 9.5 times, respectively.

كوبي اولیه برای مرحله خوب مخرب، regrinding، و به عنوان مرحله…

Mechanism and Optimization of Polyepoxysuccinic Acid in Washing …

Soil washing is an important technique for remediating metal-contaminated soils, and screening promising eluant and optimizing its washing conditions can enhance the restoration efficiencies. Biodegradable polyepoxysuccinic acid (PESA) was employed to remove Cd, Pb, and Zn from two contaminated soils. FTIR analysis suggested that …

كوبي اولیه برای مرحله خوب مخرب، regrinding، و به عنوان مرحله…

Remediation of soil polluted with petroleum

Contaminated soil-washing. It is a crucial ex-situ method applied based on the physico-chemical separation and leaching process. In this method, dispersion of toxic PHs occurs between soil clay particles and the washing solution (Tran et al., 2022). PHs molecules bind to soil silts and clay particles, disperse water, and raise groundwater ...

كوبي اولیه برای مرحله خوب مخرب، regrinding، و به عنوان مرحله…