Tags

Type your tag names separated by a space and hit enter

Formation of chlorinated by-products during photo-Fenton degradation of pyrimethanil under saline conditions. Influence on toxicity and biodegradability.
J Hazard Mater. 2012 May 30; 217-218:217-23.JH

Abstract

This study evaluated the formation of chlorinated transformation products during photo-Fenton treatment of pyrimethanil (PYR-20 mg L(-1)) in two water matrices, demineralised water (DW) and water containing 5 g L(-1) of NaCl (DW(NaCl)). All experiments were carried out in compound parabolic collectors (CPC) at an initial Fe(2+) concentration of 5 mg L(-1) and H(2)O(2) concentration of 150-350 mg L(-1). Dissolved Organic Carbon (DOC), High-Performance Liquid Chromatography with Diode-Array Detection (HPLC-DAD), Liquid Chromatography-Time-Of-Flight Mass Spectrometry (LC-TOF-MS), toxicity and biodegradability tests were conducted to control the photocatalytic treatment. In DW, PYR was completely eliminated after 11.8 min of illumination and initial DOC was reduced 50% after 79 min of illumination with 33 mM of H(2)O(2) consumed. On the other hand, in DW(NaCl) water matrix, the same reduction in DOC took 110 min of illumination and H(2)O(2) consumption of 39 mM, and total degradation of PYR was observed at 12 min of illumination. PYR transformation products (TPs) were identified by LC-TOF-MS. It was demonstrated that photo-Fenton in a DW(NaCl) produces some chlorinated TPs in addition to the non-chlorinated TPs identified during degradation in the DW. All TPs formed were eliminated during photo-Fenton. Additionally, the presence of chlorinated TPs does not increase the toxicity of the water, and TPs formed are more biodegradable than PYR.

Authors+Show Affiliations

Plataforma Solar de Almería (CIEMAT), Tabernas, Almería, Spain. carla.sirtori@unila.edu.brNo affiliation info availableNo affiliation info availableNo affiliation info available

Pub Type(s)

Journal Article
Research Support, Non-U.S. Gov't

Language

eng

PubMed ID

22459976

Citation

Sirtori, Carla, et al. "Formation of Chlorinated By-products During photo-Fenton Degradation of Pyrimethanil Under Saline Conditions. Influence On Toxicity and Biodegradability." Journal of Hazardous Materials, vol. 217-218, 2012, pp. 217-23.
Sirtori C, Zapata A, Malato S, et al. Formation of chlorinated by-products during photo-Fenton degradation of pyrimethanil under saline conditions. Influence on toxicity and biodegradability. J Hazard Mater. 2012;217-218:217-23.
Sirtori, C., Zapata, A., Malato, S., & Agüera, A. (2012). Formation of chlorinated by-products during photo-Fenton degradation of pyrimethanil under saline conditions. Influence on toxicity and biodegradability. Journal of Hazardous Materials, 217-218, 217-23. https://doi.org/10.1016/j.jhazmat.2012.03.017
Sirtori C, et al. Formation of Chlorinated By-products During photo-Fenton Degradation of Pyrimethanil Under Saline Conditions. Influence On Toxicity and Biodegradability. J Hazard Mater. 2012 May 30;217-218:217-23. PubMed PMID: 22459976.
* Article titles in AMA citation format should be in sentence-case
TY - JOUR T1 - Formation of chlorinated by-products during photo-Fenton degradation of pyrimethanil under saline conditions. Influence on toxicity and biodegradability. AU - Sirtori,Carla, AU - Zapata,Ana, AU - Malato,Sixto, AU - Agüera,Ana, Y1 - 2012/03/15/ PY - 2011/11/20/received PY - 2012/03/04/revised PY - 2012/03/06/accepted PY - 2012/3/31/entrez PY - 2012/3/31/pubmed PY - 2012/8/4/medline SP - 217 EP - 23 JF - Journal of hazardous materials JO - J. Hazard. Mater. VL - 217-218 N2 - This study evaluated the formation of chlorinated transformation products during photo-Fenton treatment of pyrimethanil (PYR-20 mg L(-1)) in two water matrices, demineralised water (DW) and water containing 5 g L(-1) of NaCl (DW(NaCl)). All experiments were carried out in compound parabolic collectors (CPC) at an initial Fe(2+) concentration of 5 mg L(-1) and H(2)O(2) concentration of 150-350 mg L(-1). Dissolved Organic Carbon (DOC), High-Performance Liquid Chromatography with Diode-Array Detection (HPLC-DAD), Liquid Chromatography-Time-Of-Flight Mass Spectrometry (LC-TOF-MS), toxicity and biodegradability tests were conducted to control the photocatalytic treatment. In DW, PYR was completely eliminated after 11.8 min of illumination and initial DOC was reduced 50% after 79 min of illumination with 33 mM of H(2)O(2) consumed. On the other hand, in DW(NaCl) water matrix, the same reduction in DOC took 110 min of illumination and H(2)O(2) consumption of 39 mM, and total degradation of PYR was observed at 12 min of illumination. PYR transformation products (TPs) were identified by LC-TOF-MS. It was demonstrated that photo-Fenton in a DW(NaCl) produces some chlorinated TPs in addition to the non-chlorinated TPs identified during degradation in the DW. All TPs formed were eliminated during photo-Fenton. Additionally, the presence of chlorinated TPs does not increase the toxicity of the water, and TPs formed are more biodegradable than PYR. SN - 1873-3336 UR - https://www.unboundmedicine.com/medline/citation/22459976/Formation_of_chlorinated_by_products_during_photo_Fenton_degradation_of_pyrimethanil_under_saline_conditions__Influence_on_toxicity_and_biodegradability_ L2 - https://linkinghub.elsevier.com/retrieve/pii/S0304-3894(12)00285-3 DB - PRIME DP - Unbound Medicine ER -