Vocational Training Council
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S3-1 [5] Applying Big Data in Higher Education: A Case Study of TeacherFocused Data Analytics
No full textS11-2 [10] Perceived benefits of studying general education for vocational education students in Hong Kong
No full textParallel Presentation Session 1, 5, 9
No full textPlease refer to separate entries of Parallel Presentation Session 1, 5, 9 Presentation 01 Presentation 05 Presentation 0
Trace elements and polycyclic aromatic hydrocarbons in road gully sediments from different land uses, Hong Kong
No full text© 2018, Springer-Verlag GmbH Germany, part of Springer Nature. Purpose: This study investigated the concentrations of cadmium (Cd), chromium (Cr), copper (Cu), lead (Pb), nickel (Ni), zinc (Zn), and polycyclic aromatic hydrocarbons (PAHs) in sediments collected from gully pots for road drainage in Hong Kong. The presence and intensity of anthropogenic contamination of road gully sediments were assessed. Identifications of potential sources of trace elements and PAHs were performed to help understand the situation for future control of pollution to the land and aquatic environments. Materials and methods: Gully sediment samples were collected from gully pots of 18 roads that are potentially exposed to different pollution sources in Hong Kong. The selection of roads considered different road features, adjacent land uses, and traffic volumes. Composite samples were collected for the analysis of trace elements (Cd, Cr, Cu, Pb, Ni, and Zn) and PAHs by an accredited environmental testing laboratory. Geo-accumulation index (I geo ), contamination factor (C f ), modified degree of contamination (mC d ), ecological risk factor (Er), and pollution load index (PLI) were used to assess the level of ecological risk of trace element contamination. Positive matrix factorization (PMF) and PAH diagnostic ratios were applied to identify the sources of trace elements and PAHs. Results and discussion: Elevated trace element concentrations were commonly found in gully sediments. The concentrations of Zn (267–3700 mg kg −1 ) were the highest compared to the other trace elements. Noticeable high concentrations of Cu (27–1020 mg kg −1 ), Pb (21–332 mg kg −1 ), and Cr (14–439 mg kg −1 ) were found in all samples. The PAH contents were moderate to high (0.6 to 24.7 mg kg −1 ). Commercial/industrial emissions and road features that cause frequent acceleration-deceleration and turning events showed important influences on the contaminant levels. Strong correlations between the concentrations of Cd, Cr, Pb, and Zn were identified, implying that these trace elements are likely from common sources. The contamination assessment indices reflect significant sediment pollution. The ecological risk ranges from the considerable/moderate-risk class to over the high-risk class. Conclusions: The collected gully sediments are identified as highly contaminated and need to be isolated from the environment upon final disposal. Through the comprehensive analysis of the collected data, this study provides a detailed insight into the contaminant levels of road gully sediments and potential sources of contamination. Disposal of gully sediments and potential impacts due to release of contaminants into the downstream aquatic environment during rainstorm events should receive attention and need further investigation
Gastropedia 美食百科
Get PDFGlobal warming
熱力四射
Fiery, flavourful and variegated, the chilli is powering a culinary heatwave
色彩繽紛、味道強烈的辣椒是佳餚美食的刺激夥
Less is more 化腐朽為佳餚
Get PDFThrough creative cooking, pioneering chefs are using food waste and overlooked ingredients to change our relationship with produce and the way we eat, thereby creating a more sustainable food culture.
廚師們發揮創意，將廚餘和備受忽視的食材變成可口美食，改變我們跟農產品的關係和飲食習慣，從而創造可持續發展的飲食文化
Industry and Professional Perspectives: Value Chain Disruption and Other Game Changers (Industry/HR professional panel)
No full textThe disruptive challenges of the C21st and development of new workforce skills within the context of Industry 4.0 has never been greater. In this panel session, professionals from the creative industries, public utilities, technology and innovation, and human resources share the challenges and opportunities for workforce futures and recruitment now and into the future
