This paper aims to uncover the spatial distribution of waste mobile phones and perform a preliminary optimization of the location of waste mobile phone recycling centers in China. This study first selects the best-suited among the logistic, Gompertz, and Bass models to forecast the per capita holding quantity of mobile phones. Combined with the population projected by the GM(1,1) and logistic models, the spatial distribution of waste mobile phones is uncovered through the stock-based model. Finally, a mixed-integer programming model is established to optimize the location of recycling centers upon the spatial distribution of waste mobile phones. Accordingly, the logistic model is concluded as the best-suited in terms of forecasting the per capita holding quantity of mobile phones for all 31 provinces in mainland China. The spatial distribution of waste mobile phones indicates the largest number in Guangdong, Shandong, and Jiangsu while the fewest are in Xizang, Qinghai, and Ningxia, in 2016. Furthermore, a remarkable increase in waste mobile phones from 2016 to 2036 in Guangdong and Beijing is projected. The location planning study indicates that a total of 175 recycling centers will be required to cover all waste mobile phones in China in 2036. Guangdong, Beijing and Zhejiang are the top three provinces regarding the number of recycling centers, with 29, 12, and 11 centers, respectively. The authors also propose the effective promoting of waste mobile phone recycling through regional cooperation and the establishment of regional management centers. The results of this study are expected to benefit waste mobile phone recycling in China.
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Appetite
January 2025
Department of Family Relations and Applied Nutrition, University of Guelph, Guelph, Canada. Electronic address:
The primary objective of this research was to evaluate the feasibility and acceptability of "Supper Heroes", a superhero-themed mobile health (mHealth) intervention designed to reduce food waste and increase plant-based protein food intake among families with children aged 9-14 in Ontario, Canada. A single arm, pre-post mixed methods design was used to evaluate the intervention. The 4-month mHealth intervention included 7 online modules with infographics, videos, and activities to help families reduce their food waste and eat more plant-based protein foods.
View Article and Find Full Text PDFMaterials (Basel)
December 2024
Department of Agricultural and Environmental Chemistry, University of Agriculture in Krakow, al. Mickiewicza 21, 31-120 Krakow, Poland.
Composite materials based on diatomite (DT) with the addition of biochar (BC), dolomite (DL), and bentonite (BN) were developed. The effect of chemical modification on the chemical structure of the resulting composites was investigated, and their influence on heavy metal immobilization and the ecotoxicity of post-flotation sediments was evaluated. It was demonstrated that the chemical modifications resulted in notable alterations to the chemical properties of the composites compared to pure DT and mixtures of DT with BC, DL, and BN.
View Article and Find Full Text PDFWaste Manag
January 2025
Beijing Key Laboratory of Farmland Soil Pollution Prevention and Remediation, College of Resources and Environmental Science, China Agricultural University, Beijing 100193, China. Electronic address:
The mycelial networks of fungi promote the interaction between the originally isolated bacteria, thereby potentially enhancing the exchange of nutrients and the horizontal transfer of genetic materials. However, the driving effect of fungi on antibiotic resistance genes (ARGs) during mesophilic facultative composting is still unclear. This study aims to elucidate the changes in ARGs and underlying mechanisms during the mesophilic composting of manure.
View Article and Find Full Text PDFJ Air Waste Manag Assoc
January 2025
ICF International, San Francisco, California.
The R-LINE model, which was released in 2013 as a stand-alone model for roadway-type applications and was based on a set of newly developed dispersion curves, exhibited favorable model performance in a limited set of evaluations (Heist et. al, 2013, Snyder et al. 2013, Venkatram et al.
View Article and Find Full Text PDFEnviron Sci Process Impacts
January 2025
Environmental Chemistry Section, Faculty of Environmental Sciences and Natural Resource Management, Norwegian University of Life Sciences, Aas, Norway.
Alum shale formations in Scandinavia are generally enriched in uranium (U) and, when exposed to air and water, may produce acidic rock drainage (ARD), releasing potentially harmful elements into the environment. Taraldrud is a legacy site in southeast Norway where approx. 51 000 m of alum shale was deposited in the 1980s-1990s.
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