Soil flushing and simultaneous degradation of organic pollutants in soils by electrokinetic-Fenton treatment

Popescu, Marius; Rosales, Emílio; Sandu, Ciprian; Meijide, Jéssica; Pazos, Marta; Lazăr, Gabriel; Sanromán, M. Ángeles

doi:10.1016/j.psep.2016.03.012

Cited by 31 publications

(9 citation statements)

References 38 publications

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“…Conflicting results on the use of citrate in MF process for the remediation of TPHs contaminated soils have been found in the literature. As summarized in Table 5, some authors have obtained interesting results when using CitrA [38,72,74,160,161]. Chang et al reported that the stabilizing effect order for different CAs on the decomposition of hydrogen peroxide and TPHs removal was: Citrate > Phosphate > EDDS > EDTA, as summarized in Table 7 [72].…”

Section: Total Petroleum Hydrocarbons (Tphs)mentioning

confidence: 99%

Application of Chelating Agents to Enhance Fenton Process in Soil Remediation: A Review

et al. 2021

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Persistent organic contaminants affecting soil and groundwater pose a significant threat to ecosystems and human health. Fenton oxidation is an efficient treatment for removing these pollutants in the aqueous phase at acidic pH. However, the in-situ application of this technology for soil remediation (where pHs around neutrality are required) presents important limitations, such as catalyst (iron) availability and oxidant (H2O2) stability. The addition of chelating agents (CAs), forming complexes with Fe and enabling Fenton reactions under these conditions, so-called chelate-modified Fenton process (MF), tries to overcome the challenges identified in conventional Fenton. Despite the growing interest in this technology, there is not yet a critical review compiling the information needed for its real application. The advantages and drawbacks of MF must be clarified, and the recent achievements should be shared with the scientific community. This review provides a general overview of the application of CAs to enhance the Fenton process for the remediation of soils polluted with the most common organic contaminants, especially for a deep understanding of the activation mechanisms and influential factors. The existing shortcomings and research needs have been highlighted. Finally, future research perspectives on the use of CAs in MF and recommendations have been provided.

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Section: Total Petroleum Hydrocarbons (Tphs)mentioning

confidence: 99%

Application of Chelating Agents to Enhance Fenton Process in Soil Remediation: A Review

et al. 2021

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“…In addition to chelating soluble Fe(II) or Fe(III), CAs can also be advantageous in improving the catalytic ability of iron-based solids (hematite, zero-valent Fe etc.) or soil native Fe minerals (Polli et al, 2018;Popescu et al, 2017;Sherwood and Cassidy, 2014). These CAs facilitate the desorption of soil entrapped Fe allowing the formation of CA/soluble Fe complexes which can then participate in Fenton oxidation.…”

Section: Modified Fenton Oxidation and Role Of Chelating Agentsmentioning

confidence: 99%

Fenton oxidation for soil remediation: A critical review of observations in historically contaminated soils

Usman

Jellali

Anastopoulos

et al. 2022

Journal of Hazardous Materials

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“…Various advanced oxidation process (AOP) methods are remediation techniques, effective in the removal of PPCPs. They include treatment methods using UV radiations in combination with H 2 O 2 , ozone, or titanium dioxide [11][12][13][14]. Most AOP methods can effectively remove CBZ residues (93-100%) from water [15][16][17][18].…”

Section: Introductionmentioning

confidence: 99%

Photocatalytic Oxidative Degradation of Carbamazepine by TiO2 Irradiated by UV Light Emitting Diode

Ran

Fang²,

Sun

et al. 2020

Catalysts

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Here, ultraviolet light-emitting diodes (UV-LED) combined with TiO2 was used to investigate the feasibility of carbamazepine (CBZ) degradation. The effects of various factors, like crystal form of the catalyst (anatase, rutile, and mixed phase), mass concentration of TiO2, wavelength and irradiation intensity of the UV-LED light source, pH of the reaction system, and coexisting anions and cations, on the photocatalytic degradation of CBZ were studied. The mixed-phase (2.8 g/L) showed the best degradation efficiency at 365 nm among three kinds of TiO2, wherein CBZ (21.1 µM) was completely oxidized within 1 h. The results of batch experiments showed that: (i) CBZ degradation efficiency under UV-LED light at 365 nm was higher than 275 nm, due to stronger penetrability of 365 nm light in solution. (ii) The degradation efficiency increased with increase in irradiation intensity and pH, whereas it decreased with increase in initial CBZ concentration. (iii) The optimal amount of mixed-phase TiO2 catalyst was 2.8 g/L and excessive catalyst decreased the rate. (iv) The co-existence of CO32−, HCO3−, and Fe3+ ions in water significantly accelerated the degradation rate of photocatalytic CBZ, whereas Cu2+ ions strongly inhibited the degradation process of CBZ. ·OH was found to be the main active species in the UV-LED photocatalytic degradation of CBZ. UV-LED is more environmentally friendly, energy efficient, and safer, whereas commercial TiO2 is economical and readily available. Therefore, this study provides a practically viable reference method for the degradation of pharmaceuticals and personal care products (PPCPs).

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Soil flushing and simultaneous degradation of organic pollutants in soils by electrokinetic-Fenton treatment

Cited by 31 publications

References 38 publications

Application of Chelating Agents to Enhance Fenton Process in Soil Remediation: A Review

Application of Chelating Agents to Enhance Fenton Process in Soil Remediation: A Review

Fenton oxidation for soil remediation: A critical review of observations in historically contaminated soils

Photocatalytic Oxidative Degradation of Carbamazepine by TiO2 Irradiated by UV Light Emitting Diode

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