砷捕捉化學物質或可淨化飲用水

加入我們的科學愛好者社群!


關於支援科學新聞業

如果您喜歡這篇文章,請考慮透過以下方式支援我們屢獲殊榮的新聞業 訂閱。 透過購買訂閱,您將幫助確保未來能夠繼續報道關於塑造我們當今世界的發現和想法的具有影響力的故事。


如果美國環境保護署 (EPA) 大幅降低飲用水中允許的砷含量(一專案前正在審議中的法規),公眾將受益於更高的標準。 實際上,攝入高濃度的砷與多種癌症和其他疾病有關。 但是,根據他們設定的限值有多低,EPA 的決定可能會帶來數十億美元的代價。 然而,桑迪亞國家實驗室的研究人員開發的新型砷捕捉材料可能有助於降低這一成本。

為了製造砷捕捉化學物質,桑迪亞的開發人員首先選擇了已知可以吸引帶負電原子團或陰離子的礦物族,例如含砷化合物砷酸鹽。 然後,他們利用超級計算機建模來快速評估數千種這些礦物的變體和組合的砷捕捉潛力。 模擬結果揭示了一系列有前景的材料——被稱為特定陰離子奈米工程吸附劑 (SANS)。 該團隊目前正在實驗室中驗證 SANS 的潛力,將受砷汙染的水透過它們並測量流出物中砷的含量。

接下來,研究人員希望在計劃在阿爾伯克基市(新墨西哥州)建立的城市淨水廠以及農村社群的較小供水系統中測試這些材料。 團隊成員 Pat Brady 評論說:“市政當局現在可以過濾掉汙垢、淤泥和汙水,但是以十億分之幾的濃度廉價地去除物質是一項新的且具有挑戰性的難題。”

Kate Wong is an award-winning science writer and senior editor at 大眾科學 focused on evolution, ecology, anthropology, archaeology, paleontology and animal behavior. She is fascinated by human origins, which she has covered for more than 25 years. Recently she has become obsessed with birds. Her reporting has taken her to caves in France and Croatia that Neandertals once called home, to the shores of Kenya's Lake Turkana in search of the oldest stone tools in the world, to Madagascar on an expedition to unearth ancient mammals and dinosaurs, to the icy waters of Antarctica, where humpback whales feast on krill, and on a "Big Day" race around the state of Connecticut to find as many bird species as possible in 24 hours. Kate is co-author, with Donald Johanson, of Lucy's Legacy: The Quest for Human Origins. She holds a bachelor of science degree in biological anthropology and zoology from the University of Michigan. Follow Wong on X (formerly Twitter) @katewong

More by Kate Wong
© .