Furosemide removal in constructed wetlands: Comparative efficiency of LECA and Cork granulates as support matrix

Machado, Ana Isabel; Dordio, Ana V.; Fragoso, Rita; Leitão, André; Duarte, Élcio Roberto

doi:10.1016/j.jenvman.2017.08.002

Cited by 24 publications

(13 citation statements)

References 46 publications

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“…Apparently expanded clay has the ability to adsorb hydrocarbons, which then are slowly released after hexadecane addition. In accordance, Machado et al (2017) observed sorption kinetics in expanded clay lasting over several days, but with high final removal rates. Sorption by expanded clay appeared less relevant when decane was added, possibly because decane is more soluble and less hydrophobic.…”

Section: Mass Transfer Limiting Decane Biodegradationsupporting

confidence: 84%

“…At the moment there is no firm explanation for this behavior. Possibly initial sorption processes reduced bioavailability but after 42 days hexadecane became bioavailable, which has also been observed for pharmaceuticals and polycyclic aromatic hydrocarbons by Dordio et al (2010), Machado et al (2017) and Nkansah et al (2012).…”

Section: Established Microbial Community and Involvement In Hexadecanmentioning

confidence: 68%

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Unravelling the process of petroleum hydrocarbon biodegradation in different filter materials of constructed wetlands by stable isotope fractionation and labelling studies

et al. 2021

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Maintaining and supporting complete biodegradation during remediation of petroleum hydrocarbon contaminated groundwater in constructed wetlands is vital for the final destruction and removal of contaminants. We aimed to compare and gain insight into biodegradation and explore possible limitations in different filter materials (sand, sand amended with biochar, expanded clay). These filters were collected from constructed wetlands after two years of operation and batch experiments were conducted using two stable isotope techniques; (i) carbon isotope labelling of hexadecane and (ii) hydrogen isotope fractionation of decane. Both hydrocarbon compounds hexadecane and decane were biodegraded. The mineralization rate of hexadecane was higher in the sandy filter material (3.6 µg CO2 g−1 day−1) than in the expanded clay (1.0 µg CO2 g−1 day−1). The microbial community of the constructed wetland microcosms was dominated by Gram negative bacteria and fungi and was specific for the different filter materials while hexadecane was primarily anabolized by bacteria. Adsorption / desorption of petroleum hydrocarbons in expanded clay was observed, which might not hinder but delay biodegradation. Very few cases of hydrogen isotope fractionation were recorded in expanded clay and sand & biochar filters during decane biodegradation. In sand filters, decane was biodegraded more slowly and hydrogen isotope fractionation was visible. Still, the range of observed apparent kinetic hydrogen isotope effects (AKIEH = 1.072–1.500) and apparent decane biodegradation rates (k = − 0.017 to − 0.067 day−1) of the sand filter were low. To conclude, low biodegradation rates, small hydrogen isotope fractionation, zero order mineralization kinetics and lack of microbial biomass growth indicated that mass transfer controlled biodegradation.

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Section: Mass Transfer Limiting Decane Biodegradationsupporting

confidence: 84%

Section: Established Microbial Community and Involvement In Hexadecanmentioning

confidence: 68%

Unravelling the process of petroleum hydrocarbon biodegradation in different filter materials of constructed wetlands by stable isotope fractionation and labelling studies

et al. 2021

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“…Total organic carbon (TOC) was quantified according to American Public Health Association [30] with a LECO CR-412 analyzer TOC-L equipment. The pH and oxidation-reduction potential (ORP) in the water samples were measured using a multi-parameter tester (Hanna HI9828).…”

Section: Uv/h 2 O 2 -Cw System Coupling and Analytical Proceduresmentioning

confidence: 99%

Efficient Malathion Removal in Constructed Wetlands Coupled to UV/H2O2 Pretreatment

et al. 2020

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Intensive agriculture has led to the increasing application of pesticides, such as malathion, thus generating large volumes of untreated cropland wastewater (CropWW). In this work, a hybrid system constructed wetlands (CW) coupled in continuous with an optimized UV/H2O2 pretreatment was evaluated for the efficient removal of malathion contained in CropWW. In the first stage, 90 min UV irradiation time (UV IR) and 65 mM hydrogen peroxide (H2O2) were identified as optimal operation parameters through a central composite design. The second stage consisted of CW planted with Phragmites australis collected from the agricultural discharge area and operated as a piston flow reactor. Furthermore, CW hydraulic residence times (HRT) of 1, 2 and 3 days, including hydraulic coupling, were evaluated. The removal efficiencies obtained in the first stage (UV/H2O2) were 94 ± 2.5% of malathion and 45 ± 2.5% of total organic carbon (TOC). In stage two (CW) 65 ± 9.6% TOC removal was achieved during the first 17 days, from which around 24% was associated to the biosorption of malathion byproducts. Subsequently, and until the operation ends, CW removed about 80% of TOC for 2 and 3 days HRT, with no significant differences (p > 0.2), which is higher than those reported in several studies involving only advanced oxidation processes (AOP) with UV IR times above 240 min and even for systems using catalysts. The results obtained indicate that the system UV/H2O2-CW is a technically suitable option for the treatment of CropWW with a high content of malathion mainly found in developing countries. Moreover, the hybrid system proposed also represent significant reduction in the size of the treatment plant.

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“…It accounted only 30% ACT removal in the co-processes of adsorption and biodegradation (Lin et al, 2010). To improve ACT adsorption efficiency, we suggested using light expanded clay aggregates media, so-called LECA, as this material contains alkaline of oxides and carbonates (Machado et al, 2017). They would increase adsorption efficiency by enhancing electrostatic interaction of LECA's surface and pollutants.…”

Section: Acetaminophen Removal By Constructed Wetlandmentioning

confidence: 99%

“…Hence, we suggest using advanced oxidation process to diminish high-dose TDS, but it would generate extra cost. Otherwise, LECA media was an alternative to augment both TN and dissolved solids removal (Liu et al, 2014;Machado et al, 2017). This media was highly useful for removing water-soluble compounds in hospital wastewater, such as furosemide, benzene, alcohol and acid.…”

Section: Nutrient Removal In Constructed Wetlandmentioning

confidence: 99%

Removal and monitoring acetaminophen-contaminated hospital wastewater by vertical flow constructed wetland and peroxidase enzymes

Koottatep

Chapagain

et al. 2019

Journal of Environmental Management

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Hospital wastewater contains acetaminophen (ACT) and nutrient, which need adequate removal and monitoring to prevent impact to environment and community. This study developed a pilot scale vertical flow constructed wetland (CW) to (1) remove high-dose ACT and pollutants in hospital wastewater and (2) identify the correlation of peroxidase enzyme extruded by Scirpus validus and pollutants removal efficiency. By that correlation, a lowcost method to monitor pollutants removal was drawn. Plants, such as Scirpus validus, generated peroxidase enzymes to alleviate pollutants' stress. Results showed that the CW removed 3.5 to 6 logs of initial concentration 10 mg ACT/L to a recommended level for drinking water. The CW eliminated COD, TKN and TP efficiently, meeting the wastewater discharged standards of Thailand and Vietnam. By various multivariable regression models, concentrations of ACT in CW effluent and enzymes in S. validus exhibited a significant correlation (p < 0.01, R 2 = 68.3%). These findings suggested that (i) vertical flow CW could remove high-dose ACT and nutrient and (ii) peroxidase enzymes generated in S. validus, such as soluble and covalent ones, could track ACT removal efficiency. This would help to reduce facilities and analytical cost of micro-pollutants.

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Furosemide removal in constructed wetlands: Comparative efficiency of LECA and Cork granulates as support matrix

Cited by 24 publications

References 46 publications

Unravelling the process of petroleum hydrocarbon biodegradation in different filter materials of constructed wetlands by stable isotope fractionation and labelling studies

Unravelling the process of petroleum hydrocarbon biodegradation in different filter materials of constructed wetlands by stable isotope fractionation and labelling studies

Efficient Malathion Removal in Constructed Wetlands Coupled to UV/H2O2 Pretreatment

Removal and monitoring acetaminophen-contaminated hospital wastewater by vertical flow constructed wetland and peroxidase enzymes

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