Simple method for removal of pollutants from water by freezing a portion of aquatic solution using a PET bottle, shredder scrap, and household freezer.
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引用次数: 0
Abstract
A simple method for purifying water using household items has been developed. The solution containing an environmental pollutant was added to the PET bottle. The lid of the PET bottle was closed, and the bottle was then placed with the lid down in a freezer for 9 h. The pourer of the PET bottle was surrounded by shredded paper scraps as a lagging material. Before the solution was completely frozen, the sample was removed from the freezer. The unfrozen portion (liquid) was sampled. The pollutant was concentrated in the liquid. The remaining frozen portion was completely thawed. As results, the concentration of the pollutant (Congo Red, Cr (VI), Pb (II), pentachlorophenol, fluoride, nitrate, or phosphate) in the thawed liquid was decreased by more than 90% compared with the initial concentration (0.10 mM). PRACTITIONER POINTS: A pollutant in a water sample can be removed by freezing a portion of the solution using a PET bottle, shredder scrap, and household freezer. Fluorine and hexavalent chromium can be removed from water to levels that meet water quality standards. The present method can efficiently remove a wide range of contaminants from water, including azo dyes, heavy metals, and pentachlorophenol.
我们开发了一种利用家用物品净化水的简单方法。在 PET 瓶中加入含有环境污染物的溶液。将 PET 瓶的瓶盖盖上，然后将瓶盖朝下放入冰箱冷冻 9 小时。在溶液完全冻结之前，将样品从冰箱中取出。对未冻结的部分（液体）进行采样。污染物浓缩在液体中。剩余的冷冻部分完全解冻。结果显示，解冻后的液体中污染物（刚果红、六价铬、二价铅、五氯苯酚、氟化物、硝酸盐或磷酸盐）的浓度比初始浓度（0.10 mM）降低了 90% 以上。实践点：使用 PET 瓶、碎纸机废料和家用冰箱冷冻部分溶液，可去除水样中的污染物。可以将水中的氟和六价铬去除到符合水质标准的水平。本方法可有效去除水中的各种污染物，包括偶氮染料、重金属和五氯苯酚。
期刊介绍：
Published since 1928, Water Environment Research (WER) is an international multidisciplinary water resource management journal for the dissemination of fundamental and applied research in all scientific and technical areas related to water quality and resource recovery. WER''s goal is to foster communication and interdisciplinary research between water sciences and related fields such as environmental toxicology, agriculture, public and occupational health, microbiology, and ecology. In addition to original research articles, short communications, case studies, reviews, and perspectives are encouraged.
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