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Human exposure to lead (Pb) is a growing global public health concern. Elevated blood lead is thought to cause the mental retardation of >0.6 million children globally each year, and has recently been attributed to ~18% of all-cause mortality in the US. Due to the severe health risk, the international community, led by the United Nations Environment Programme (UNEP) and the World Health Organization (WHO), is actively supporting the global phase-out of lead-based paint by 2020. However, there are many significant hurdles on the way to achieving this goal. In light of the importance of the lead-based paint issue, and the urgency of achieving the 2020 phase-out goal, this review provides critical insights from the existing scientific literature on lead-based paint, and offers a comprehensive perspective on the overall issue. The global production and international trade of lead-based paints across Asia, Africa, Latin America, and Europe are critically discussed - revealing that lead-based paints are still widely used in many low and middle-income developing countries, and that the production and trade of lead-based paint is still wide-spread globally. In India, as well as many south-east Asian, African, Latin American and European countries, lead concentrations in paints often exceed 10,000 mg/kg. This will certainly pose a serious global threat to public health from surfaces painted with these products for many decades to come. The sources and pathways of exposure are further described to shed light on the associated health risk and socioeconomic costs. Finally, the review offers an overview of the potential intervention and abatement strategies for lead-based paints. In particular, it was found that there is a general lack of consensus on the definition of lead based paint; and, strengthening regulatory oversight, public awareness, and industry acceptance are vital in combating the global issue of lead based paint.

Due to the fast growing hotel industry in Taiwan, recent hospitality studies has paid attention to how various factors affect the Taiwanese hotel performance and offered interesting and valuable findings. To expand the financial literature of the Taiwanese hotel industry and the hospitality literature as a whole, this article is the first hospitality study to investigate how board size affects firm performance of publicly traded hotels in Taiwan. Panel regression test results reveal an interesting finding. Specifically, there is an inverted U-shaped relationship between board size and hotel performance in terms of return on assets, return on equity, and Tobin’s Q with an optimal value of board size equal to 10. This indicates that while board size up to 10 has a positive impact on hotel performance (supporting the resource dependence theory), board size can deteriorate hotel performance when it is larger than 10 (supporting the agency theory).

In the present work, coal fly ash-derived mesoporous silica material (CFA-MS) has been successfully fabricated without employing any extra silica source. The obtained CFA-MS was characterized by Fourier transform infrared spectroscopy, nitrogen adsorption-desorption measurement, powder X-ray diffraction and transmission electron microscopy. Nitrogen adsorption-desorption measurement disclosed that CFA-MS possesses Brunauer-Emmett-Teller-specific surface area of 497 m 2 Ág À1 and pore volume of 0.49 cm 3 Ág À1 , respectively. Furthermore, CFA-MS was evaluated for the adsorptive removal of methylene blue from aqueous solution. Several influence parameters on the removal of methylene blue including contact time, pH, initial concentration and temperature were studied in detail. Moreover, Langmuir, Freundlich, Temkin and Dubinin-Radushkevich isotherm models were employed for interpretation of the adsorption process, while the pseudo-first-order and pseudo-second-order kinetics equations were applied to investigate the adsorption kinetics. Results in the current work demonstrate that CFA-MS can be used as an efficient adsorbent for methylene blue removal.

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