TY  - JOUR
AU  - Andrade, Deborah C.
AU  - Đolić, Maja B.
AU  - Martínez-Huitle, Carlos A.
AU  - dos Santos, Elisama V.
AU  - Silva, Tânia F.C.V.
AU  - Vilar, Vítor J.P.
PY  - 2022
UR  - http://TechnoRep.tmf.bg.ac.rs/handle/123456789/5316
AB  - This work proposes an eco-efficient treatment technology for the remediation of a kaolinite-based clay soil artificially contaminated with hexavalent chromium (50 mg Cr(VI) kg–1 soil), combining electrokinetics (EK) with permeable reactive barriers (PRB) composed of cork granules, the major by-product of cork stoppers production. This 100% natural and sustainable material can act as (i) an electron donor in the Cr(VI) reduction into trivalent chromium [Cr(III)], the less toxic state, and as (ii) a binder for the reduced Cr(III) on its pre-oxidized surface. The EK and Cr(VI) reduction efficiencies were assessed over 15 days as a function of the: (i) supporting electrolyte solution (demineralized water – DW, tap water, citric acid – CA, and sodium chloride – NaCl); and (ii) cork-PRB inclusion and position (near the anodic compartment, using direct current, or in the soil middle section, applying reversal polarity). Results showed that DW was the best supporting electrolyte solution, removing about 33% of total chromium (CrT) from the soil towards the anode, mainly under the Cr(VI) form, even though CA and NaCl presented higher electrical conductivity. Besides, nearly 67% Cr(VI) was reduced into less mobile Cr(III) only by soil-borne electron donor constituents, especially iron (> 6 g kg–1), which impaired the overall Cr migration due to the Cr(III) precipitation/adsorption over/onto the soil. Such reaction was boosted by CA and NaCl electrolytes, which increased H+ ions availability, reaching reduction efficiencies higher than 98%. When the cork-PRB was incorporated into the DW-driven EK process near the anode, the best position owing to the low pH, the Cr(VI) reduction and CrT removal efficiencies improved to about 97% and 42%, respectively. Furthermore, virtually no Cr(VI) migrated to the anolyte/catholyte, and less than 2% Cr(III) was found in the anodic chamber, being c.a. 40% of CrT retained in the cork-PRB as Cr(III) and c.a. 3%/55% of Cr(VI)/Cr(III) into the soil. Notwithstanding, the EK-PRB process can render polluted soil somewhat less dangerous and prevent the spreading of contamination to natural aquifers.
PB  - Elsevier Ltd.
T2  - Electrochimica Acta
T1  - Coupling electrokinetic with a cork-based permeable reactive barrier to prevent groundwater pollution: A case study on hexavalent chromium-contaminated soil
SP  - 140936
VL  - 429
DO  - 10.1016/j.electacta.2022.140936
ER  - 

@article{
author = "Andrade, Deborah C. and Đolić, Maja B. and Martínez-Huitle, Carlos A. and dos Santos, Elisama V. and Silva, Tânia F.C.V. and Vilar, Vítor J.P.",
year = "2022",
abstract = "This work proposes an eco-efficient treatment technology for the remediation of a kaolinite-based clay soil artificially contaminated with hexavalent chromium (50 mg Cr(VI) kg–1 soil), combining electrokinetics (EK) with permeable reactive barriers (PRB) composed of cork granules, the major by-product of cork stoppers production. This 100% natural and sustainable material can act as (i) an electron donor in the Cr(VI) reduction into trivalent chromium [Cr(III)], the less toxic state, and as (ii) a binder for the reduced Cr(III) on its pre-oxidized surface. The EK and Cr(VI) reduction efficiencies were assessed over 15 days as a function of the: (i) supporting electrolyte solution (demineralized water – DW, tap water, citric acid – CA, and sodium chloride – NaCl); and (ii) cork-PRB inclusion and position (near the anodic compartment, using direct current, or in the soil middle section, applying reversal polarity). Results showed that DW was the best supporting electrolyte solution, removing about 33% of total chromium (CrT) from the soil towards the anode, mainly under the Cr(VI) form, even though CA and NaCl presented higher electrical conductivity. Besides, nearly 67% Cr(VI) was reduced into less mobile Cr(III) only by soil-borne electron donor constituents, especially iron (> 6 g kg–1), which impaired the overall Cr migration due to the Cr(III) precipitation/adsorption over/onto the soil. Such reaction was boosted by CA and NaCl electrolytes, which increased H+ ions availability, reaching reduction efficiencies higher than 98%. When the cork-PRB was incorporated into the DW-driven EK process near the anode, the best position owing to the low pH, the Cr(VI) reduction and CrT removal efficiencies improved to about 97% and 42%, respectively. Furthermore, virtually no Cr(VI) migrated to the anolyte/catholyte, and less than 2% Cr(III) was found in the anodic chamber, being c.a. 40% of CrT retained in the cork-PRB as Cr(III) and c.a. 3%/55% of Cr(VI)/Cr(III) into the soil. Notwithstanding, the EK-PRB process can render polluted soil somewhat less dangerous and prevent the spreading of contamination to natural aquifers.",
publisher = "Elsevier Ltd.",
journal = "Electrochimica Acta",
title = "Coupling electrokinetic with a cork-based permeable reactive barrier to prevent groundwater pollution: A case study on hexavalent chromium-contaminated soil",
pages = "140936",
volume = "429",
doi = "10.1016/j.electacta.2022.140936"
}

Andrade, D. C., Đolić, M. B., Martínez-Huitle, C. A., dos Santos, E. V., Silva, T. F.C.V.,& Vilar, V. J.P.. (2022). Coupling electrokinetic with a cork-based permeable reactive barrier to prevent groundwater pollution: A case study on hexavalent chromium-contaminated soil. in Electrochimica Acta
Elsevier Ltd.., 429, 140936.
https://doi.org/10.1016/j.electacta.2022.140936

Andrade DC, Đolić MB, Martínez-Huitle CA, dos Santos EV, Silva TF, Vilar VJ. Coupling electrokinetic with a cork-based permeable reactive barrier to prevent groundwater pollution: A case study on hexavalent chromium-contaminated soil. in Electrochimica Acta. 2022;429:140936.
doi:10.1016/j.electacta.2022.140936 .

Andrade, Deborah C., Đolić, Maja B., Martínez-Huitle, Carlos A., dos Santos, Elisama V., Silva, Tânia F.C.V., Vilar, Vítor J.P., "Coupling electrokinetic with a cork-based permeable reactive barrier to prevent groundwater pollution: A case study on hexavalent chromium-contaminated soil" in Electrochimica Acta, 429 (2022):140936,
https://doi.org/10.1016/j.electacta.2022.140936 . .

TY  - JOUR
AU  - Silva, Karyn NO
AU  - Henrique, João MM
AU  - Đolić, Maja B.
AU  - Martínez-Huitle, Carlos A
AU  - Dos Santos, Elisama V
AU  - Moreira, Francisca C
AU  - Vilar, Vítor JP
PY  - 2022
UR  - http://TechnoRep.tmf.bg.ac.rs/handle/123456789/5196
AB  - Soil washing is a well-known technology for the remediation of soils polluted by organic contaminants, including polycyclic aromatic hydrocarbons (PAHs). This study aimed to go further by integrating soil washing and permeable reactive barriers (PRBs) made of cork granules to remove PAHs from the soil. While PAHs may be transferred from the soil to the washing solution in the soil washing step, the cork PRB may provide the removal of PAHs from the washing solution, ultimately leading to the reuse of this solution. RESULTS: The integrated approach was tested by means of packed bed column experiments in the absence and presence of cork PRBs. Two PAHs were under focus: fluorene (FLU) and phenanthrene (PHE). In soil with 0.5 mmol L−1 kgsoil−1 of FLU and PHE, the soil washing technique employing thermally treated cork granules and a solution of 70%/30% water/acetonitrile (v/v) flowing at 2.2 mL min−1 promoted the transfer of ~58% of PAHs from the soil to the washing solution, while the cork PRB retained ~98% of the PAHs from the washing solution. The acetonitrile content of the water/acetonitrile washing solutions contributed to the soil washing since it was responsible for PAH desorption and elution, however it was unfavorable for PAH sorption onto the cork as acetonitrile competed with PAHs for cork sorption sites. CONCLUSION: Cork PRBs were able to retain PAHs from soil washing solutions and provide final solutions free of PAHs, demonstrating the viability of integrating solvent-aided soil washing with cork PRBs. © 2022 Society of Chemical Industry (SCI).
PB  - John Wiley and Sons Ltd
T2  - Journal of Chemical Technology and Biotechnology
T1  - Integration of soil washing and cork permeable reactive barriers for the remediation of soil contaminated with polycyclic aromatic hydrocarbons
DO  - 10.1002/jctb.7203
ER  - 

@article{
author = "Silva, Karyn NO and Henrique, João MM and Đolić, Maja B. and Martínez-Huitle, Carlos A and Dos Santos, Elisama V and Moreira, Francisca C and Vilar, Vítor JP",
year = "2022",
abstract = "Soil washing is a well-known technology for the remediation of soils polluted by organic contaminants, including polycyclic aromatic hydrocarbons (PAHs). This study aimed to go further by integrating soil washing and permeable reactive barriers (PRBs) made of cork granules to remove PAHs from the soil. While PAHs may be transferred from the soil to the washing solution in the soil washing step, the cork PRB may provide the removal of PAHs from the washing solution, ultimately leading to the reuse of this solution. RESULTS: The integrated approach was tested by means of packed bed column experiments in the absence and presence of cork PRBs. Two PAHs were under focus: fluorene (FLU) and phenanthrene (PHE). In soil with 0.5 mmol L−1 kgsoil−1 of FLU and PHE, the soil washing technique employing thermally treated cork granules and a solution of 70%/30% water/acetonitrile (v/v) flowing at 2.2 mL min−1 promoted the transfer of ~58% of PAHs from the soil to the washing solution, while the cork PRB retained ~98% of the PAHs from the washing solution. The acetonitrile content of the water/acetonitrile washing solutions contributed to the soil washing since it was responsible for PAH desorption and elution, however it was unfavorable for PAH sorption onto the cork as acetonitrile competed with PAHs for cork sorption sites. CONCLUSION: Cork PRBs were able to retain PAHs from soil washing solutions and provide final solutions free of PAHs, demonstrating the viability of integrating solvent-aided soil washing with cork PRBs. © 2022 Society of Chemical Industry (SCI).",
publisher = "John Wiley and Sons Ltd",
journal = "Journal of Chemical Technology and Biotechnology",
title = "Integration of soil washing and cork permeable reactive barriers for the remediation of soil contaminated with polycyclic aromatic hydrocarbons",
doi = "10.1002/jctb.7203"
}

Silva, K. N., Henrique, J. M., Đolić, M. B., Martínez-Huitle, C. A., Dos Santos, E. V., Moreira, F. C.,& Vilar, V. J.. (2022). Integration of soil washing and cork permeable reactive barriers for the remediation of soil contaminated with polycyclic aromatic hydrocarbons. in Journal of Chemical Technology and Biotechnology
John Wiley and Sons Ltd..
https://doi.org/10.1002/jctb.7203

Silva KN, Henrique JM, Đolić MB, Martínez-Huitle CA, Dos Santos EV, Moreira FC, Vilar VJ. Integration of soil washing and cork permeable reactive barriers for the remediation of soil contaminated with polycyclic aromatic hydrocarbons. in Journal of Chemical Technology and Biotechnology. 2022;.
doi:10.1002/jctb.7203 .

Silva, Karyn NO, Henrique, João MM, Đolić, Maja B., Martínez-Huitle, Carlos A, Dos Santos, Elisama V, Moreira, Francisca C, Vilar, Vítor JP, "Integration of soil washing and cork permeable reactive barriers for the remediation of soil contaminated with polycyclic aromatic hydrocarbons" in Journal of Chemical Technology and Biotechnology (2022),
https://doi.org/10.1002/jctb.7203 . .