Decontamination of soil washing wastewater using solar driven advanced oxidation processes

Bandala, Erick R.; Velasco, Yuridia; Torres, Luis G.

doi:10.1016/j.jhazmat.2008.03.011

Cited by 47 publications

(12 citation statements)

References 44 publications

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“…In fact, previous studies have shown that Fe 2+ -mediated processes are sensitive to light up to a wavelength of 600 nm [38]. The Fe 2+ /H 2 O 2 process, for example, has been reported to exhibit higher degradation efficiency under solar light irradiation than dark Fenton [39,40]. The …”

Section: Resultsmentioning

confidence: 99%

Efficient degradation of lindane in aqueous solution by iron (II) and/or UV activated peroxymonosulfate

Khan

et al. 2016

Journal of Photochemistry and Photobiology A: Chemistry

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Section: Resultsmentioning

confidence: 99%

Efficient degradation of lindane in aqueous solution by iron (II) and/or UV activated peroxymonosulfate

Khan

et al. 2016

Journal of Photochemistry and Photobiology A: Chemistry

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“…The photocatalytic degradation of surfactants in water by solar fenton like oxidation reaction and the infl uence of various chemical parameters on degradation is critically studied (Bhatkhande et al 2002 ;Amat et al 2004 ;Venhuis and Mehrvar 2004 ;Bandala et al 2008a ;Bandala et al 2008b ). Comparison of photo-fenton reaction and cobalt/peroxymonosulfate/ultraviolet (Co/PMS/UV) process showed that the use of solar radiation increased the degradation rate in one magnitude order when compared with dark experiments and further increase of Co/PMS reagent concentration increased reaction rate twice to achieve almost complete surfactant degradation in 5 min (Bandala et al 2008a ).…”

Section: Photocatalytic Degradationmentioning

confidence: 99%

Pollutant Diseases, Remediation and Recycling

2013

Environmental Chemistry for a Sustainable World

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“…This work is original. In fact, few studies have been reported that deal with the chemical oxidation process for the treatment of wastewater originating from the soil washing process [28][29][30], or with hot water extraction combined with in situ wet oxidation for the removal of polycyclic aromatic hydrocarbons (PAHs) from soil [31,32]. To our knowledge, no research dealing solely with the direct application of the WO process for the remediation of contaminated soils has been published.…”

Section: Introductionmentioning

confidence: 99%

Wet Oxidation of Fine Soil Contaminated with Petroleum Hydrocarbons: A Way towards a Remediation Cycle

et al. 2018

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The aim of this experimental study was to assess the feasibility of using a wet oxidation (WO) process for treating fine soil with a high level of total petroleum hydrocarbons (TPHs). Two samples of soil were spiked with two different contaminants (motor oil, and motor oil + diesel). The samples were subjected to a WO bench plant test, where the effect of the main process parameters (i.e., temperature and reaction time) on the removal of TPHs was investigated. Results show that the WO process is effective for the decontamination of hydrocarbons, and a strong reduction (>85%) can be obtained with the typical working conditions of a full-scale plant (temperature = 250 • C, reaction time = 30 min). The solid residue resulting from the WO process was characterized in order to evaluate the recovery options. In terms of chemical characterization, the contents of the pollutants comply with the Italian regulations for commercial and industrial site use. Moreover, the results of the leaching test suggested that these residues could be reused for ceramic and brick manufacturing processes.In addition, it must be taken into account that due to the tendency of contaminants to accumulate in the fine fraction of soil [4], in many cases, that fraction is not treated, but instead directly landfilled, and the remediation cycle is not completed; something that occurs, as reported by Dermont et al. [5], in soil washing treatment. Another aspect to be taken into account is the change in the partition of the contaminant amongst the different fractions of the soils due to the washing process [6].In recent times, the European Commission has adopted an ambitious Circular Economy Package [7], aiming to stimulate Europe's transition towards a circular economy. The proposed actions will contribute to "closing the loop" of product life cycles through greater recycling and reuse, and will bring benefits for both the environment and the economy. Therefore, the technicians are motivated to improve or find alternative remediation technologies finalized to close the remediation cycle, and give a new life to waste.A technology that can be useful in reaching the aforementioned targets is the wet oxidation (WO) process, which is reliable and effective in the treatment of a wide spectrum of organic aqueous waste, even toxic waste, produced by various branches of industrial activity [8,9], and sewage sludge [10].Typical treatment conditions for sludge and hazardous wastes reported in the literature are as follows: 200-325 • C for temperature; 5000-17,500 kPa for pressure; and 15-120 min for the reaction time. The preferred COD load ranges from 10-80 kg·m −3 .One of the biggest advantages related to the WO process is that decontamination is obtained with low polluting output gases, composed mainly of CO 2 , water steam, and oxygen, without hazardous by-products and low organic content in the final residue [8,11,12]. In addition, the WO effluent can be conveniently treated in a conventional wastewater treatment plant because of its high biodegradability...

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Decontamination of soil washing wastewater using solar driven advanced oxidation processes

Cited by 47 publications

References 44 publications

Efficient degradation of lindane in aqueous solution by iron (II) and/or UV activated peroxymonosulfate

Efficient degradation of lindane in aqueous solution by iron (II) and/or UV activated peroxymonosulfate

Pollutant Diseases, Remediation and Recycling

Wet Oxidation of Fine Soil Contaminated with Petroleum Hydrocarbons: A Way towards a Remediation Cycle

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