RESUMO
As global effects of water scarcity raise concerns and environmental regulations evolve, contemporary wastewater treatment plants (WWTPs) face the challenge of effectively removing a diverse range of contaminants of emerging concern (CECs) from municipal effluents. This study focuses on the assessment of advanced oxidation processes (AOPs), specifically UV-C/H2O2 and UV-C/Chlorine, for the removal of 14 target CECs in municipal secondary effluent (MSE, spiked with 10 µg L-1 of each CEC) or in the subsequent MSE nanofiltration retentate (NFR, no spiking). Phototreatments were carried out in continuous mode operation, with a hydraulic retention time of 3.4 min, using a tube-in-tube membrane photoreactor. For both wastewater matrices, UV-C photolysis (3.3 kJ L-1) exhibited high efficacy in removing CECs susceptible to photolysis, although lower treatment performance was observed for NFR. In MSE, adding 10 mg L-1 of H2O2 or Cl2 enhanced treatment efficiency, with UV-C/H2O2 outperforming UV-C/Chlorine. Both UV-C/AOPs eliminated the chronic toxicity of MSE toward Chlorella vulgaris. In the NFR, not only was the degradation of target CECs diminished, but chronic toxicity to C. vulgaris persisted after both UV-C/AOPs, with UV-C/Chlorine increasing toxicity due to potential toxic by-products. Nanofiltration permeate (NFP) exhibited low CECs and microbial content. A single chlorine addition effectively controlled Escherichia coli regrowth for 3 days, proving NFP potential for safe reuse in crop irrigation (<1 CFU/100 mL for E. coli; <1 mg L-1 for free chlorine). These findings provide valuable insights into the applications and limitations of UV-C/H2O2 and UV-C/Chlorine for distinct wastewater treatment scenarios.
Assuntos
Cloro , Filtração , Peróxido de Hidrogênio , Fotólise , Raios Ultravioleta , Eliminação de Resíduos Líquidos , Águas Residuárias , Poluentes Químicos da Água , Peróxido de Hidrogênio/química , Águas Residuárias/química , Poluentes Químicos da Água/química , Poluentes Químicos da Água/análise , Eliminação de Resíduos Líquidos/métodos , Cloro/química , Filtração/métodos , Purificação da Água/métodos , Chlorella vulgaris/efeitos dos fármacos , Escherichia coli/efeitos dos fármacos , OxirreduçãoRESUMO
a população vem se tornando mais inativa, improdutiva e ociosa. Esses maus hábitos acumulados durante muito tempo se tornam prejudiciais à saúde, podendo ocasionar várias doen ças cardiovasculares e dislipidemias. Para prevenir e tratar essas disfunções recomenda-se a prática regular de exercícios físicos aeróbios (EFA) aliado a um fortalecimento muscular. Objetivou-se avaliar os efeitos de quatro semanas do treinamento combinado de corrida de rua e treinamento em circuito funcio nal ( TCF) sobre variáveis relacionadas à saúde e desempenho físico de corredores de rua recreacionais. 32 indivíduos foram divididos, de acordo com a relação cintura/quadril (RCQ), em grupo de risco baixo (GRB; 22,0 ± 1,33 anos; 168,3 ± 3,18 cm; 65,4 ± 3,39 kg), grupo de risco moderado (GRM; 27,7 ± 2 ,04 anos; 167,7 ± 2,03 cm; 71,4 ± 4,66 kg), grupo de risco alto (GRA; 26,8 ± 3,16 anos; 1 63 ,0 ± 3 ,02 cm; 71,80 ± 5,9 kg). Realizaram avaliações físicas de composição corporal, testes das cap acidades físicas (cooper, RAST, flexibilidade, impulsão horizontal e vertical), foram submet idos a quat ro sem anas de treinamento aeróbio e TCF. Foram feitos os testes ANOVA two-way para verificar as diferenças entre o s grupos, e um pós-teste tukey, adotou-se o valor de p < 0,05. Resultados apontaram melho ra n a a ptidão cardiorrespiratória (p=0,0006), aumento na massa magra (p=0,039 1), redução da RCQ (p =0 ,011 6), aumentou a força dos membros inferiores (p=0,0315) e melhora na flexibilidade (p=0,0326). Portanto tais alterações são clinicamente importantes, mostrando assim um progresso na qualidade de v ida de fo rm a ampla e aperfeiçoando também o desempenho físico desse público...(AU)
the population has become more inactive, unproductive and idle. These bad habits accumulated for a long time can become harmful to health, causing various cardiovascular diseases an d dyslipidemias. To prevent and treat these dysfunctions it is recommended to p ractice regular aerobic physical exercises together with a muscular strengthening. The aim of this st udy was t o ev aluate t he effects of four weeks of the combined training of running and training in functional circuit o n v ariabl es related to health and physical performance of recreational street runners. 32 in dividuals were div ided according to waist/hip ratio, in low risk group (22,0 ± 1,33 years old; 168,3 ± 3,18 cm; 6 5,4 ± 3 ,3 9 k g) moderate risk group (27,7 ± 2,04 years old; 167,7 ± 2,03 cm; 71,4 ± 4,66 kg) high risk group (26,8 ± 3,1 6 years old; 163,0 ± 3,02 cm; 71,80 ± 5,9 kg). Physical evaluations of body composition were p erformed and also physical ability tests, they were submitted to four weeks of aerobic training and functional circuit training. The ANOVA two-way test was performed to verify the differences between t he gro up s and a tukey post-test. The p value adopted was p < 0,05. The results indicated an improvement in cardiorespiratory fitness (p=0,0006). Therefore, such improvements are clinically significant, sh o win g a broad progress in the quality of life and also improving the physical performance of this public...(AU)
Assuntos
Humanos , Masculino , Feminino , Adulto , Adulto Jovem , Corrida , Doenças Cardiovasculares , Maleabilidade , Dislipidemias , Comportamento Sedentário , Desempenho Físico Funcional , Treino Aeróbico , Qualidade de Vida , Composição Corporal , Exercício Físico , Saúde , Relação Cintura-Quadril , HábitosRESUMO
To disclose the molecular mechanisms involved in luminal midgut buffering of M.â¯domestica, we used RNA-seq analyses from triplicate samples of seven sections along the midgut to evaluate the expression levels of genes coding for selected manually curated protein sequences. Channels, pumps and transporters were confirmed as being apical by proteomics of purified microvillar membranes. Midgut pH determinations with a microsensor and a pH indicator were carried out in larvae in different diets with or without added compounds to evaluate the role of proteins in buffering. The data suggested that acidification occurs at middle midgut by the action of H+ V-ATPase with protons produced by carbonic anhydrase, followed by chloride ions transported by a K+Cl- symporter. K+ ions are recovered by an apical K+ channel and K+ homeostasis maintained by a basolateral Na+/K+-ATPase. Acidification is also affected by a Na+/H+ exchanger and a multidrug resistance protein. Posterior midgut alkalization results from the action of a NH3 transporter and H+-coupled peptide transporter, mainly in a diet rich in free peptides. A working model was proposed for the midgut luminal acidification and alkalization, as well as for mucosal protection against acid by a neutralized mucus layer.