Determination of micro-organic contaminants in groundwater (Maribor, Slovenia)

Koroša, Anja; Auersperger, Primož; Mali, Nina

doi:10.1016/j.scitotenv.2016.06.103

Cited by 51 publications

(20 citation statements)

References 36 publications

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“…The highest levels of TBA (up to 25.7 ng L − 1 ) were observed during the spring campaign, and the DET/TBA ratio, calculated for 29 samples, ranged from 1.4 to 2.9 (Korosa et al 2016), suggesting diffuse contamination. Indeed, in the case of a point source of pollution, the pesticide leaches directly into groundwaters without significant interaction with the soil, giving a DET/TBA ratio lower than unity.…”

Section: Groundwatermentioning

confidence: 93%

Terbuthylazine and desethylterbuthylazine: Recent occurrence, mobility and removal techniques

2018

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The herbicide terbuthylazine (TBA) has displaced atrazine in most of EU countries, becoming one of the most regularly used pesticides and, therefore, frequently detected in natural waters. The affinity of TBA for soil organic matter suggests prolonged contamination; degradation leads to the release of the metabolite desethylterbuthylazine (DET), which has higher water solubility and binds more weakly to organic matter compared to the parent compound, resulting in higher associated risk for contamination of groundwater resources. Additionally, TBA and DET are chemicals of emerging concern because of their persistence and toxicity towards aquatic organisms; moreover, they are known to have significant endocrine disruption capacity to wildlife and humans. Conventional treatments applied during drinking water production do not lead to the complete removal of these chemicals; activated carbon provides the greatest efficiency, whereas ozonation can generate by-products with comparable oestrogenic activity to atrazine. Hydrogen peroxide alone is ineffective to degrade TBA, while UV/HO advanced oxidation and photocatalysis are the most effective processes for oxidation of TBA. It has been determined that direct photolysis gives the highest degradation efficiency of all UV/HO treatments, while most of the photocatalytic degradation is attributed to OH radicals, and TiO solar-photocatalytic ozonation can lead to almost complete TBA removal in ∼30 min. Constructed wetlands provide a valuable buffer capacity, protecting downstream surface waters from contaminated runoff. TBA and DET occurrence are summarized and removal techniques are critically evaluated and compared, to provide the reader with a comprehensive guide to state-of-the-art TBA removal and potential future treatments.

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Section: Groundwatermentioning

confidence: 93%

Terbuthylazine and desethylterbuthylazine: Recent occurrence, mobility and removal techniques

2018

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“…Na podlagi suhe prostorninske teže materiala je ocenjena učinkovita poroznost vodonosnika približno 0,25, na podlagi prostorninske teže naravno vlažnega materiala pa na najmanj 0,15 (Žlebnik, 1982). Povprečna debelina nenasičene cone je ocenjena na podlagi izdelanega modela na 8,35 m (Urbanc et al, 2014, Mali & Koroša, 2016, povprečna debelina zasičene cone je 12,05 m (Urbanc et al, 2014), glede na podatke iz leta 1999 pa od 15 do 17 m (Žlebnik & Drobne, 1998). Podzemna voda se v kvartarnem vodonosniku Dravskega polja pretaka v generalni smeri od zahoda proti vzhodu.…”

Section: Območje Raziskavunclassified

Occurence of pesticides in Dravsko polje aquifer

Koroša¹,

Mali²

2019

Geologija

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V članku predstavljamo rezultate raziskave pojavnosti in koncentracij pesticidov v podzemni vodi Dravskega polja v obdobju 2013-2015. Na podlagi rezultatov smo ocenili prostorsko razširjenost pesticidov v podzemni vodi in jo povezali z rabo prostora. V obdobju dveh let smo odvzeli 76 vzorcev podzemne vode na 19 različnih lokacijah. V podzemni vodi smo določili 15 pesticidov z njihovimi metaboliti. Najpogosteje določen pesticid v podzemni vodi je še vedno atrazin in njegov razgradni produkt desetilatrazin. Sledijo mu metolaklor, terbutilazin in njegov razgradni produkt desetilterbutilazin. Pesticidi alaklor, dimetenamid, metazaklor in terbutrin niso bili določeni. Analiza zaznanih pesticidov z rabo prostora kaže na višje vrednosti na območjih z intenzivno kmetijsko dejavnostjo. V severnem delu Dravskega polja, južnem robu mesta Maribor, so koncentracije pesticidov manjše, povišane vrednosti pesticidov pa se pojavljajo v južnem delu Dravskega polja, kar sovpada tudi z intenzivnejšo kmetijsko rabo tal na tem območju. Z vrednotenjem razmerij med razgradnim produktom in primarnim pesticidom iz naslova atrazina in terbutilazina (DAR in DTA/TBA) smo ocenili »starosti« onesnaženja. Presenetljiva je visoka pojavnost atrazina, ki je lahko posledica starih bremen, počasne razgradnje in hidrogeoloških pogojev ali pa uporabe atrazina po uveljavitvi prepovedi uporabe.

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“…Although polar benzotriazoles are quite non-volatile, they can be determined either with derivatization (trimethylsulfonium hydroxide (TMSH), acetylation [ 33 , 44 , 45 ]) or without [ 7 , 46 ], to reduce the complexity of the method [ 47 ]. The stationary phase used is 5%-phenyl-methylpolysiloxane or equivalent [ 5 , 7 , 45 , 46 , 48 , 49 , 50 ], except in rare cases, for example [ 51 ], where the authors tested various ionic liquids as stationary phases and reported faster separation and better peak shape than with conventional columns. A two-dimensional GC × GC-TOF method has been developed by Jover et al [ 47 ], who separated co-eluted analytes and achieved LODs similar to LC-MS/MS.…”

Section: Analytical Techniques For the Determination Of Polar Benzmentioning

confidence: 99%

“…Almost invariably, MS [ 5 , 45 , 49 , 50 , 52 ] or MS/MS [ 7 , 46 ] detectors are used after separation. In one case, isotope ratio MS was also performed, but the authors reported difficulties with low sensitivity, low volatility, and interactions of analytes with the exposed metal components of the instrument, demanding instrument modification or derivatization of the analytes [ 44 ].…”

Section: Analytical Techniques For the Determination Of Polar Benzmentioning

confidence: 99%

Solid-Phase Extraction of Polar Benzotriazoles as Environmental Pollutants: A Review

Kraševec

Prosen

2018

Molecules

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Polar benzotriazoles are corrosion inhibitors with widespread use; they are environmentally characterized as emerging pollutants in the water system, where they are present in low concentrations. Various extraction methods have been used for their separation from various matrices, ranging from classical liquid–liquid extractions to various microextraction techniques, but the most frequently applied extraction technique remains the solid-phase extraction (SPE), which is the focus of this review. We present an overview of the methods, developed in the last decade, applied for the determination of benzotriazoles in aqueous and solid environmental samples. Several other matrices, such as human urine and plant material, are also considered in the text. The methods are reviewed according to the determined compounds, sample matrices, cartridges and eluents used, extraction recoveries and the achieved limits of quantification. A critical evaluation of the advantages and drawbacks of the published methods is given.

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Determination of micro-organic contaminants in groundwater (Maribor, Slovenia)

Cited by 51 publications

References 36 publications

Terbuthylazine and desethylterbuthylazine: Recent occurrence, mobility and removal techniques

Terbuthylazine and desethylterbuthylazine: Recent occurrence, mobility and removal techniques

Occurence of pesticides in Dravsko polje aquifer

Solid-Phase Extraction of Polar Benzotriazoles as Environmental Pollutants: A Review

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