Heavy metal concentrations of Cd, Cu, Pb and Zn were monitored during 10 rainfall runoff events occurred on a representative expressway road in Nanjing. Discharge rule of metal pollution, event mean concentrations (EMC) and the effect of hydrologic characteristics were evaluated. The results indicated that the discharge characteristics were various in different types of rainfall events. The metal concentrations fluctuated in the range of comparatively high levels during the events with short duration, light rainfall and low intensity. In the events with long duration, heavy rainfall and initial high intensity, the initial metal concentrations were high and metal exhibited a pronounced first flush. Second flush effect existed in the events with short duration, medium rainfall and double intensity peaks. The EMCs of Cd, Cu, Pb and Zn were 1.43 microg x L(-1), 0.092 mg x L(-1), 38.6 microg x L(-1) and 0.51 mg x L(-1), respectively. EMCs showed that the pollution extent of Pb was serious. Pollution of Cd, Cu and Pb were similar to other domestic reports, but Pb was lower than those studies. Cu and Zn were similar to related foreign studies, but Cd and Pb were lower. Correlation analysis suggested that the influence of rainfall on the discharge of Cu and the influence of antecedent dry period on the accumulation of Zn were significant.
Download full-text PDF |
Source |
|---|
Publication Analysis
Top Keywords
Similar Publications
Maturing conditions of bimetallic nanocomposites as a new factor influencing Au-Ag synergism and impact of Cu(II) and/or Fe(III) on luminescence.
R Soc Open Sci
January 2025
Department of Experimental Physics, Faculty of Science, Palacký University Olomouc, Olomouc, Czech Republic.
Gold-silver synergism has been well documented in many scientific works dealing with luminescent nanostructures that are exploitable in biomedical and environmental application. Frequently, the ratio of Au : Ag in synthetic mixtures was varied to influence the extent of Au-Ag synergism of the resulting luminescent gold-silver nanoclusters (GSNCs). However, in our approach, a new step, maturing under differing conditions using the same Au : Ag ratio (5 : 1), has been investigated systematically for the very first time.
View Article and Find Full Text PDFEmerging contaminants in the Mediterranean Sea endangering Lebanon's Palm Islands Natural Reserve.
RSC Adv
January 2025
Department of Physical Sciences, School of Arts and Sciences, Lebanese American University Beirut 1102-2801 Lebanon +961 1 786456, ext. 3950.
The Mediterranean Sea is an intercontinental marine environment renowned for its biodiversity and ecological significance. However, it is also one of the most polluted seas globally with significant levels of microplastics and heavy metals among other emerging contaminants. In Lebanon, inadequate waste management infrastructure and unregulated industrial discharges have exacerbated water quality deterioration by introducing these complex contaminants into surface and seawater.
View Article and Find Full Text PDFE-waste recycling in an optimized way for copper recovery by leaching and a case study on E-waste generation and management in Dhaka city.
Heliyon
January 2025
Department of Chemical Engineering, Bangladesh University of Engineering and Technology (BUET), Dhaka, 1000, Bangladesh.
The widespread adoption of electronic devices has enhanced living standards but has also led to a surge in electronic waste (e-waste), creating serious environmental and health challenges. Although various methods exist to recover valuable metals from e-waste, each has notable drawbacks. Among these, chemical leaching with aqua regia is widely used but is both highly corrosive and hazardous.
View Article and Find Full Text PDFEnzyme-Instructed Interfacial Jamming of Pillar[5]arenes for Macroscopic Signal Amplification.
Langmuir
January 2025
Institute of Nano Science and Technology, Knowledge City, Sector 81, SAS Nagar, Mohali, Punjab 140306, India.
Enzyme-instructed signal generation at liquid-liquid interfaces presents a novel strategy for controlling and detecting biochemical processes on macroscopic scales. Here, we explore the self-assembly and jamming of pillar[5]arene (P[5]A) derivatives at the oil-water interface via a copper-mediated "click" reaction, providing a versatile platform for generating observable signals. The formation of a pillar[5]arenes network at the droplet interface reduces interfacial tension, allowing droplets to adopt various nonequilibrium shapes based on the interfacial jamming process.
View Article and Find Full Text PDFCation Effect on the Electrochemical Platinum Dissolution.
J Am Chem Soc
January 2025
Department of Chemistry, Pohang University of Science and Technology, Pohang 37673, Republic of Korea.
Ensuring the stability of electrocatalysts is paramount to the success of electrochemical energy conversion devices. Degradation is a fundamental process involving the release of positively charged metal ions into the electric double layer (EDL) and their subsequent diffusion into the bulk electrolyte. However, despite its vital importance in achieving prolonged electrocatalysis, the underlying causality of catalyst dissolution with the EDL structure remains largely unknown.
View Article and Find Full Text PDFWant AI Summaries of new PubMed Abstracts delivered to your In-box?
Enter search terms and have AI summaries delivered each week - change queries or unsubscribe any time!