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Electro-bioremediation of a mixture of structurally different contaminants of emerging concern: Uncovering electrokinetic contribution
- Source :
- Journal of Hazardous Materials
- Publication Year :
- 2021
- Publisher :
- Elsevier BV, 2021.
-
Abstract
- (SOE2/P5/F0505) UIDB/04085/2020 UIDB/04612/2020 UIDP/04612/2020 SFRH/BPD/114660/2016 CEECIND/04210/2017) This study analyses the electrokinetic (EK) contribution to the removal from a clay soil of a mixture of 10 different contaminants of emerging concern (CECs; 17β-estradiol, E2; sulfamethoxazole, SMX; bisphenol A, BPA; ibuprofen, IBU; 17α-ethinylestradiol, EE2; oxybenzone, OXY; diclofenac, DCF; triclosan, TCS; caffeine, CAF; carbamazepine, CBZ). After 4 days, the CECs natural attenuation was between 0% (CBZ) and 90% (E2) yet increasing with the application of EK (20 mA, 12 h ON/OFF) to 14% (CBZ) and 100% (E2). When EK was applied, the CECs more recalcitrant to biodegradation (i.e. ≤ 13% biotic decay) mostly underwent electro-chemical induced degradation (OXY, DCF, TCS, CAF, CBZ). Daily irrigation enhanced the rates of the electro-oxidation -osmosis and -migration, increasing the CECs decay. After 8 days of EK treatment, the CECs decay increased, surpassing the decay lag phase of some compounds (OXY, TCS, and CBZ). Yet after 16 days, most CECs showed similar removals with and without EK, with EK only acting positively on SMX, OXY, TCS and CBZ (ca. +10%). Our results support that EK application can improve the removal of CECs from soil, however, under the conditions tested, 16-day treatment lead to pH alterations that decreased the bioremediation efficiency and inhibited electro-degradation near the cathode. proof epub_ahead_of_print
- Subjects :
- Bisphenol A
Environmental Engineering
Health, Toxicology and Mutagenesis
Pharmaceuticals and personal care products
0211 other engineering and technologies
Electrokinetic remediation
02 engineering and technology
010501 environmental sciences
Osmosis
01 natural sciences
Environmental impact of pharmaceuticals and personal care products
Soil
chemistry.chemical_compound
Bioremediation
Soil Pollutants
Environmental Chemistry
Waste Management and Disposal
Clay soil
Environmental Restoration and Remediation
0105 earth and related environmental sciences
021110 strategic, defence & security studies
Microbiota
Abiotic removal
Biodegradation
Pollution
Triclosan
6. Clean water
Biodegradation, Environmental
chemistry
13. Climate action
Environmental chemistry
Oxybenzone
Subjects
Details
- ISSN :
- 03043894
- Volume :
- 406
- Database :
- OpenAIRE
- Journal :
- Journal of Hazardous Materials
- Accession number :
- edsair.doi.dedup.....f7fd6632cb9b8168dec5ef0bfc89c90f