Photodegradation characteristics of PPCPs in water with UV treatment

Kim, Il-Ho; Tanaka, Hiroaki

doi:10.1016/j.envint.2009.01.003

Cited by 296 publications

(138 citation statements)

References 14 publications

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“…After mixing and aging for 24 h (Schlusener et al 2003), the soil samples were extracted with 15 mL of the mixture of acetonitrile and EDTA-McIlvaine buffer (pH 4.0) (2:1) in the presence of ultrasonic treatment, and then (Zorita et al 2009) b (Babić et al 2007) c (Feitosafelizzola and Chiron 2009) d (Park and Choi 2008) e (Sanderson and Thomsen 2009) f (Tolls 2001) g (Lutzhoft et al 1999) h (Diaz-Cruz et al 2006) i (Kan and Petz 2000) j (Jacobsen et al 2004) k l (Kim and Tanaka 2009) m (Calza et al 2009) n (Skinner and Kanfer 1992) p (Chee-Sanford et al 2009) q (Suárez et al 2008) Group Analytes Molecular weight…”

Section: Methodsmentioning

confidence: 99%

Occurrence and distribution of antibiotics in urban soil in Beijing and Shanghai, China

Gao

Shi

et al. 2015

Environ Sci Pollut Res

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The recycling of reclaimed wastewater for irrigation and road cleaning is an important strategy to minimize water scarcity in megacities. However, little is known regarding the potential accumulation of antibiotics contained in reclaimed wastewater in urban soil. We investigated the occurrence and distribution of eight quinolones (QNs), nine sulfonamides (SAs), and five macrolides (MLs) antibiotics in urban surface soil in Beijing and Shanghai, China. QNs, especially norfloxacin (NOR), ofloxacin (OFL), and ciprofloxacin (CIP) were the predominant antibiotics in urban surface soil, and NOR revealed the highest average concentration of 94.6 μg kg −1 . The antibiotic concentrations in urban soil in our study were higher than those detected in agricultural soils after long-term wastewater irrigation and manure fertilization. The concentrations of antibiotics in Shanghai urban soil showed a significant negative correlation with soil pH and a positive correlation with total organic carbon (TOC), reflecting the effect of speciation and soil organic matter content on sorption and retention. In addition, antibiotic concentrations in the urban soil were positively correlated with heavy metal contents, likely due to their coexistence in reclaimed wastewater and the promoting effect of metals on the sorption of antibiotics. In several soil samples, NOR, OFL, CIP, enrofloxacin (ENR), and fleroxacin (FLE) showed higher concentrations than the trigger value of 100 μg kg −1 in soil, indicating a potential risk for the environment.

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Section: Methodsmentioning

confidence: 99%

Occurrence and distribution of antibiotics in urban soil in Beijing and Shanghai, China

Gao

Shi

et al. 2015

Environ Sci Pollut Res

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“…The excretion from human and animals has caused their ubiquitous detection in surface water with relatively high concentrations (Lindsey et al, 2001;Xu et al, 2007). In surface waters photochemical degradation was reported as one of the major removal pathways for SAs (Khaleel et al, 2012;Boreen et al, 2005;Guerard et al, 2009;Kim and Tanaka, 2009). SAs usually contain five-or six-membered heterocyclic groups which make them easily absorb light and undergo direct photodegradation under UV-vis irradiation (Boreen et al, 2004;Trovó et al, 2009).…”

Section: Introductionmentioning

confidence: 99%

Photodegradation of sulfapyridine under simulated sunlight irradiation: Kinetics, mechanism and toxicity evolvement

Hao

Guo

et al. 2014

Chemosphere

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h i g h l i g h t sSulfapyridine was effectively photodegraded under UV-vis irradiation. Factors affecting the photodegradation process were investigated. Degradation intermediates were identified and possible pathway was proposed. Bioassay test showed reaction products were much more toxic than parent compound. a r t i c l e i n f o t r a c tIn this study, the photoinduced degradation of sulfapyridine (SPY) was investigated under simulated light irradiation (k > 200 nm). The effect of pH and main water constituents including nitrate ion, bicarbonate, dissolved organic matter (DOM) and iron(III) on the photodegradation was explored. SPY was effectively removed in aqueous solution at pH 8 under UV-vis irradiation, with removal efficiency of 100% within 120 min. DOM and iron(III) had retarding influence on the SPY removal, whereas nitrate ion and bicarbonate did not show any obvious effect. Under UV-vis irradiation, the formation of singlet oxygen ( 1 O 2 ) accelerated the SPY photodegradation and the contribution of indirect photolysis due to reaction with 1 O 2 was up to 42%. The transformation products of SPY were identified by HPLC-MS and the possible photoreaction pathways were proposed. It showed that photoinduced hydrolysis, photo-oxidation via 1 O 2 and desulfonation were the main degradation ways for SPY decomposition. Toxicity assays by Vibrio fischeri proved that the transformation products were more toxic than the parent compound.

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“…SAs are present in wastewaters involved with livestock production (Žegura et al, 2009), and this poses a health risk to human being when the SAs enter supplies of potable water (Kim and Tanaka, 2009;Periša M et al, 2013). Among the SAs, sulfadiazine (SD, C 10 H 10 N 4 O 2 S) is an important representative.…”

Section: Introductionmentioning

confidence: 99%

How UV photolysis accelerates the biodegradation and mineralization of sulfadiazine (SD)

et al. 2014

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Abstract:Sulfadiazine (SD), one of broad-spectrum antibiotics, exhibits limited biodegradation in wastewater treatment due to its chemical structure, which requires initial monooxygenation reactions to initiate its biodegradation. Intimately coupling UV photolysis with biodegradation, realized with the internal loop photobiodegradation reactor (ILPBR), accelerated SD biodegradation and mineralization by 40% and 71%, respectively. The main organic products from photolysis were 2-aminopyrimidine (2-AP), p-aminobenzenesulfonic acid (ABS), and aniline (An), and an SD-photolyisis pathway could be identified using C, N, and S balances. Adding An or ABS (but not 2-AP) into the SD solution during biodegradation experiments (no UV photolysis) gave SD removal and mineralization rates similar to intimately coupled photolysis and biodegradation. An SD biodegradation pathway, based on a diverse set of the experimental results, explains how the mineralization of ABS provided internal electron carriers that accelerated the initial mono-oxygenation reactions of SD biodegradation. Thus, multiple lines of evidence support that the mechanism by which intimately coupled photolysis and biodegradation accelerated SD removal and mineralization was through producing co-substrates whose oxidation produced electron equivalents that stimulated the initial mono-oxygenation reactions for SD biodegradation. Abstract:Sulfadiazine (SD), one of broad-spectrum antibiotics, exhibits limited biodegradation in wastewater treatment due to its chemical structure, which requires initial mono-oxygenation reactions to initiate its biodegradation. Intimately coupling UV photolysis with biodegradation, realized with the internal loop photobiodegradation reactor (ILPBR), accelerated SD biodegradation and mineralization by 40% and 71%, respectively. The main organic products from photolysis were 2-aminopyrimidine (2-AP), p-aminobenzenesulfonic acid (ABS), and aniline (An), and an SD-photolyisis pathway could be identified using C, N, and S balances. Adding An or ABS (but not 2-AP) into the SD solution during biodegradation experiments (no UV photolysis) gave SD removal and mineralization rates similar to intimately coupled photolysis and biodegradation. An SD biodegradation pathway, based on a diverse set of the experimental results, explains how the mineralization of ABS provided internal electron carriers that accelerated the initial mono-oxygenation reactions of SD biodegradation. Thus, multiple lines of evidence support that the mechanism by which intimately coupled photolysis and biodegradation accelerated SD removal and mineralization was through producing co-substrates whose oxidation produced electron equivalents that stimulated the initial mono-oxygenation reactions for SD biodegradation.

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Photodegradation characteristics of PPCPs in water with UV treatment

Cited by 296 publications

References 14 publications

Occurrence and distribution of antibiotics in urban soil in Beijing and Shanghai, China

Occurrence and distribution of antibiotics in urban soil in Beijing and Shanghai, China

Photodegradation of sulfapyridine under simulated sunlight irradiation: Kinetics, mechanism and toxicity evolvement

How UV photolysis accelerates the biodegradation and mineralization of sulfadiazine (SD)

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