58 documents found, page 1 of 6

Low-cost acoustic cavitation characterization inside of opaque chamber through ...

[Excerpt] Acoustic cavitation, induced by ultrasound, is key in sonolysis (Weissler, 1994). Effective cavitation monitoring is essential but current methods are costly, complex, and polluting. Piezoelectric sensors offer a promising alternative due to their affordability, simplicity, and real-time monitoring capability (Wu et al., 2022).

Effects of ultrasonic cavitation on chemical parameters in wastewater treatment

Enhanced effects of ultrasonic cavitation on the removal efficiency of ciproflo...

This study investigates the potential of ultrasonic-assisted (20kHz and 65±5 W) adsorption processes in wastewater treatment. The enhanced effects of ultrasonic cavitation on Ciprofloxacin and Cu (II) removal efficiency by adsorption on a Kaolinite and municipal organic waste compost (OC) adsorption media were studied and discussed. Experimental results indicate that within the first minute, more than 95% of th...

Road infrastructure resilience to climate change: a hydrological-based model fo...

Climate change is increasing the incidence and severity of extreme weather events around the world, and flooding is a growing risk factor for road infrastructure drainage systems. Extreme events are becoming more frequent, more intense and of longer duration, and heavy precipitation is no exception, so flooding is also becoming more frequent and of greater magnitude. Hydrodynamic modelling of the hydrological p...

UMinho’s seven guiding principles for sustainability strategies - a critical as...

The University of Minho, in 2009, published her first sustainability report. It was, at the time, the first Portuguese University to do so. This publication grew out of a voluntary and informal group of faculty members from diverse scientific areas. The commitment with sustainability reporting, and most fundamentally to the sustainability quest, was constant until 2017. During these 9 years UMinho’s public repo...

Potential recovery of phosphorus in the portuguese urban sector: an opportunity...

Phosphorus (P), which plays an important role in the food sector, is facing a global shortage. It has been identified as one of the materials at risk of scarcity, and in 2014 was declared as a critical raw material by the European Union. Studies indicate that the only way to close the P loop in the European Union is to recycle P from waste streams back into the food chain. In Portugal, the loss of P after waste...

Evaluating territorial metabolism for phosphorus (P) valorization from waste in...

Phosphorus (P) has been identified as one of the materials at risk of scarcity, and in 2014 was included in the critical raw material list by the European Union, where the vulnerability in imports is up to 90%. In view of the European regulatory picture around the circularity of P, there is great potential to reduce the consumption of primary material, through the recovery from wastes of specific sectors, such ...

A hydrological-based model for the estimation of road drainage infrastructures ...

Flood events are one of the greatest risk factors associated with road drainage infrastructures and climate change has been increasing the uncertainty around hydrological phenomena. Also, the large increase in population, and its concentration in dense urban centers, has promoted a significant increase in soil imperviousness, leading to a scenario where, for the same hyetograph, the resulting hydrograph shows a...

Evaluation of municipal waste compost in relation to the environmental retentio...

This study investigates the performance of municipal compost as a heavy metals adsorbent 1 for environmental protection systems. The performed assays test the effects of pH (2-9) and contact time (5-250 minutes) on metal retention. To simulate leaching in natural systems, the soluble organic fraction was removed, leading to variations in the surface properties, including a 10% increase of cation exchange capaci...

Who knows the price of water services, and does it make a difference? An explor...

Water scarcity represents an increasingly worldwide concern. Policies designed to address water scarcity either focus on the water supply or consumers’ demand. This paper proposes to analyze the relevance that water price plays in regulating households’ demand and, the role it could play if set differently, to induce more sustainable water use. In particular, in Portugal, the quantity of water can represent les...