Effects of sinking distance and unit weight of LAF-Contained PET bottles on evaporation suppression efficiency from water surfaces
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Abstract
Evaporation causes water loss in reservoirs. One common approach to reduce evaporation is to use floating materials to cover the water's surface. There are different commercial products available for this purpose, such as round plastic balls, round discs, and square discs, but these can be expensive. Recycling materials like PET water bottles and laminated aluminum foil (LAF) waste offers a cost-effective alternative. This study conducted a field experiment to determine the most efficient sinking distance or unit weight of LAF-contained PET bottles for suppressing evaporation. Seven plastic basins were used, including one control and six experimental basins. Each basin had a floating cover 75% of the total surface area, allowing space for bottles to float freely without overlapping. The sinking distances of horizontally placed LAF-contained PET bottles were set at 0.5, 1.0, 1.5, 2.0, 2.5, and 3.0 cm in each basin. The experimental results showed that LAF-contained PET bottles with a sinking distance of 3.0 cm (half the bottle's width when floating horizontally) and a unit weight of 442 kg/cm³ demonstrated the highest evaporation suppression efficiency as 56.9%. Therefore, the findings of this study are a guideline for preparing LAF-contained PET bottles with the appropriate sinking distance and unit weight to achieve the most effective evaporation suppression.
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References
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