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In this study, the influence of oxyranylmethanol over physiochemical properties and Pb (II) adsorption potential of RF aerogels was investigated. Three variants of RF aerogels were catalyzed with 1 mL (RF-1), 2 mL (RF-2), and 3 mL (RF-3) of oxyranylmethanol respectively. The color of the aerogels changed from light orange, dark orange, and reddish brown as the catalyst concentration increased from 1 to 3 mL. Similarly, higher catalyst concentration resulted in higher surface area, pore volume, and porosity; however, the pore size and density decreased. The best morphological and structural properties were indicated by the sample (RF-3) that was catalyzed with 3 mL of oxyranylmethanol with surface area of 290 m2/g, pore volume of 0.7 cm3/g, pore size of 4.8 nm, and density of 90 mg/cm3 respectively. The synthesized oxyranylmethanol catalyzed RF aerogels were investigated for Pb (II) adsorption from synthetic solutions. As per results, RF-3 indicated highest removal % than RF-2 and RF-1 with maximum adsorption capacity (Qm) of 210 mg/g. On the other hand, RF-2 indicated second highest removal with Qm of 153 mg/g followed by RF-1 with Qm of 112 mg/g respectively. When compared with 15 relevant studies that used other agents as catalysts/functionalizing agents for aerogel synthesis, RF-3 indicated the second highest maximum adsorption capacity (Qm). Overall, the present investigation confirmed that the higher catalyst concentration (oxyranylmethanol) in RF aerogel promotes higher degree of polymerization between R and F; hence, results in lower density, higher surface area, higher pore volume, smaller pore size, and enhanced Pb (II) adsorption from synthetic wastewater. [ABSTRACT FROM AUTHOR]

The surging global demand for food, textiles, and medicines has led to widespread exploitation, maltreatment, and contamination of water sources. The ecological and health impacts of this situation have become increasingly evident. Industries generate untreated or partially treated waste liquids known as effluents, which include wastewater, human sewage, and cooling water, as well as various inorganic and organic components. These contaminants differ among industries, making it challenging to categorize them. To tackle this pressing issue, innovative water treatment technologies are required, with recent efforts focusing on the use of modern chemicals for the adsorption and photocatalytic removal of hazardous water pollutants. One promising development in this field is the use of carbon dots, or fluorescent carbon nanoparticles. These nanomaterials have great potential for environmental monitoring and remediation. Metal-doped carbon dots (MCDs) have been shown to improve their photoluminescence capabilities and expand their application range. Compared to unmodified carbon dots, MCDs possess more catalytically active centers and enhanced catalytic activity, making them valuable in photocatalysis, electrocatalysis, chemical catalysis, and biocatalysis. This comprehensive review provides a synopsis of the most recent advancements in metal-doped carbon dots, highlighting their sensing, adsorption, and degradation applications in the remediation of water effluents. It also presents the novel and unique synthesis methods employed by recent studies in creating MCDs, along with the challenges and future prospects for their implementation. [ABSTRACT FROM AUTHOR]

The use of selective serotonin reuptake inhibitors (SSRIs) can increase the risk of gastrointestinal (GI) bleeding. Similarly, it is well known that the use of NSAIDs predisposes patients to upper GI bleeding. The aim of this study was to explore if the addition of SSRIs in patients already taking NSAIDs significantly increases their risk for upper GI bleeding. An electronic literature search was conducted using the SCOPUS and MEDLINE databases from inception through September 2020. Cohort and case–control trials that reported patients with upper GI bleeding on NSAIDs with SSRIs, compared to controls on NSAIDs only were included. Newcastle–Ottawa checklist was used to ensure inclusion of high-quality studies. Data was extracted by the lead investigator and cross-checked by the second author. Dichotomous data was pooled to obtain an odds ratio (OR) of the risk of upper GI bleeding in patients on NSAIDs with concomitant SSRI use. The primary endpoint of the study was the risk of upper GI bleeding with SSRIs and NSAIDs compared to NSAIDs alone. A total of 366 citations were reviewed, and 21 were selected for full-text evaluation. 1 cohort and 9 case–control studies were eligible. There was an additional increased risk of upper GI bleeding in patients on NSAIDs with concomitant SSRI use (OR 1.75, 95% CI = 1.32–2.33). In patients already on NSAID therapy, the concomitant use of SSRIs can significantly increase the risk of upper of GI bleeding. [ABSTRACT FROM AUTHOR]