Publications by authors named "Marques-Dos-Santos C"
Pig farming generates highly polluted wastewater that requires effective treatment to minimize environmental damage. Microalgae can recover nutrients from piggery wastewater (PWW), but excessive nutrient and turbidity levels inhibit their growth. Solar photo-Fenton (PF) offer a sustainable and cost-effective pretreatment to allow microalgal growth for further PWW treatment.
View Article and Find Full Text PDFArticle Synopsis
- The study investigated two methods—high-pressure homogenization (HPH) at 100 and 1200 bar, and enzymatic hydrolysis (EH)—to extract biostimulants from Tetradesmus obliquus, a microalga grown in piggery wastewater.
- The extracts were tested on garden cress, mung beans, and cucumbers to assess their growth-promoting effects, with untreated microalgal cultures showing the best germination rates and cytokinin-like activity.
- High-pressure homogenization at 1200 bar and enzymatic hydrolysis yielded significant increases in auxin-like activity for mung beans and cucumbers, suggesting that the extracted biomass could be beneficial for sustainable agricultural applications.
Monitoring networks show that the European Union Nitrates Directive (ND) has had mixed success in reducing nitrate concentrations in groundwater. By combining machine learning and monitored nitrate concentrations (1992-2019), we estimate the total area of nitrate hotspots in Europe to be 401,000 km, with 47% occurring outside of Nitrate Vulnerable Zones (NVZs). We also found contrasting increasing or decreasing trends, varying per country and time periods.
View Article and Find Full Text PDFIrrigation, one of the 28 agri-environmental indicators defined in the European Common Agricultural Policy, is often neglected in agricultural nitrogen (N) budgets, while it can be a considerable source of N in irrigated agriculture. The annual N input from irrigation water sources (NIrrig) to cropping systems was quantified for Europe for 2000-2010 at a resolution of 10 × 10 km, accounting for crop-specific gross irrigation requirements (GIR) and surface- and groundwater nitrate concentration. GIR were computed for 20 crops, while spatially explicit nitrate concentration in groundwater was derived using a random forest model.
View Article and Find Full Text PDFAmmonia (NH) volatilization, nitrous oxide (NO) emissions, and nitrate (NO) leaching from agriculture cause severe environmental hazards. Research studies and mitigation strategies have mostly focused on one of these nitrogen (N) losses at a time, often without an integrated view of the agro-food system. Yet, at the regional scale, NO, NH, and NO loss patterns reflect the structure of the whole agro-food system.
View Article and Find Full Text PDFBackground: There is a need to find an effective treatment against reperfusion injury. The aim of the present study was to evaluate the capacity of the ischemic postconditioning and statin to prevent renal reperfusion injury.
Design And Setting: An experimental study developed at Universidade Anhanguera-Uniderp.