OCCURRENCE AND REMOVAL OF MICROCONTAMINANTS FROM MUNICIPAL SEWAGE TREATMENTS PLANTS (STP)

Jany Hellen Ferreira de Jesus; Karla Virgínia Leite Lima; Agustín Paris-Reche; Ana Agüera; Raquel Fernandes Pupo Nogueira

Todos os Trabalhos

Trabalho

Título do Trabalho

OCCURRENCE AND REMOVAL OF MICROCONTAMINANTS FROM MUNICIPAL SEWAGE TREATMENTS PLANTS (STP)

Autores

Jany Hellen Ferreira de Jesus
Karla Virgínia Leite Lima
Agustín Paris-Reche
Ana Agüera
Raquel Fernandes Pupo Nogueira

Modalidade

Resumo

Área temática

Contaminantes emergentes e Agrotóxicos

Data de Publicação

15/04/2024

País da Publicação

Brasil

Idioma da Publicação

Português

Página do Trabalho

https://www.even3.com.br/anais/xv-laseac-x-enqamb-2024i/787242-occurrence-and-removal-of-microcontaminants-from-municipal-sewage-treatments-plants-(stp)

ISBN

978-65-272-0404-6

Palavras-Chave

emerging contaminants, pharmaceutical, wastewater treatment

Resumo

The presence of contaminants of emerging concern (CECs) from anthropogenic origin, such as pharmaceutical and their metabolites, personal care products, pesticides and sweeteners, has emerged as an aquatic environment problem worldwide. Because of the low efficiency in the removal of most microcontaminants after conventional treatment in STPs, they are released into aqueous ecosystems, making domestic sewage one of the main sources of CECs [1]. In this study, 226 target microcontaminants were monitored. The raw influent and effluent samples were collected weekly during March and April 2023 from two STPs that employ different sewage treatments and serve different population (STP 1, aerated lagoon + sedimentation lagoon, 224.034 people; STP 2, activated sludge followed by a disinfection step with sodium hypochlorite, 480 people). After membrane filtration, the samples were analyzed using a UHPLC-QqQ-MS/MS system, and a validated method previously described for monitoring the target microcontaminants [2]. The overall variability of the CEC levels in different sampling days was not significant for most samples (n=5), showing their constant presence. Despite the larger population attended in STP1, the sum of all quantified CECs in the influent was lower (625.3 µg L-1 ? 111.4) compared with STP 2 (710.4 µg L-1 ? 225.7), indicating that there is a dilution in the way to the STP1. In contrast, STP 2 presented a lower variety of CECs (54) in comparison to STP1 (61), since it serves a population with different profiles of consumption. The iodinated contrast agents iomeprol, iopamidol and iopromide appeared only in STP 1, which receives also sewage from several hospitals, while STP 2 serves a small and rural population without a hospital system. Both STPs showed a great CECs removal efficiency, 82% and 97% of the total concentration found in STP 1 and STP 2, respectively. However, only in STP 2, a decrease of total organic carbon concentration was verified. It is also important to highlight that the different treatments employed in the two STPs reflects directly on the quality of the effluent. Furthermore, a high removal variability of different CECs was observed, likely due to differences in their chemical structure and properties, which can affect their occurrence and fate. Caffeine occurs at high levels in both STPs (218 µg L-1), and is equally removed during the treatments (>99%). However, the artificial sweetener acesulfame-K (27 µg L-1) is only efficiently removed at STP 2 (>99%) compared to STP 1 (48%). In contrast, a negative balance occurred for some classes of pharmaceuticals, which can be due to: i) an enhancement of analyte responses after treatment (lower matrix effect in the effluent), commonly encountered in electrospray mass spectrometry or ii) to a process where undetected metabolites can undergo retransformation during microbial activity and then turn back into the parent compound [3,4]. Some examples include chlorothiazide, venlafaxine, mycophenolic acid, carbendazim and lamotrigine. Despite the surveillance of CECs is not mandatory in Brazil, this study can provide useful data regarding CECs occurrence and sewage treatment plants efficiency toward degradation of microcontaminants. References [1] Marson, E.O., Paniagua, C.E.S., Gomes Júnior, O., Gonçalves, B.R., Silva, V.M., Ricardo, I.A., Maria, M.C., Amorim, C.C., Trovó, A.G. 2022. Sci. Total Environ. 836. 155605. [2] Martínez-Piernas, A.B, Plaza-Bolaños, P., Gilabert, A. Agüera, A., 2021. J. Chromatogr. A. 1653, 462396. [3] Blair, B., Nikolaus, A., Hedman, C., Klaper, R., Grundl, T., 2015. Chemosphere 134, 395–401. [4] Watkinsona, A.J., Murby, E.J., Kolpin, D.W., Costanzo, S.D., 2009. Sci. Total Environ. 407, 2711–2723. Acknowledgments: PROPe-PROPG/UNESP for postdoctoral financial support to J. H. F. de Jesus. A. Paris-Reche and A. Agüera acknowledge the Regional Ministry of University, Research and Innovation, Andalusian Regional Government (ref. ProyExcel_00585, MODITRAGUA project).

Título do Evento: XV LASEAC - X ENQAmb 2024.
Cidade do Evento: Ouro Preto
Título dos Anais do Evento: Anais do XV LASEAC (Latin American Symposium on Environmental Analytical Chemistry) & X ENQAmb (Encontro Nacional de Química Ambiental)
Nome da Editora: Even3
Meio de Divulgação: Meio Digital

Como citar

JESUS, Jany Hellen Ferreira de et al.. OCCURRENCE AND REMOVAL OF MICROCONTAMINANTS FROM MUNICIPAL SEWAGE TREATMENTS PLANTS (STP).. In: . Disponível em: https//www.even3.com.br/anais/xv-laseac-x-enqamb-2024i/787242-OCCURRENCE-AND-REMOVAL-OF-MICROCONTAMINANTS-FROM-MUNICIPAL-SEWAGE-TREATMENTS-PLANTS-(STP). Acesso em: 15/06/2025