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引用次数: 0
摘要
我们感谢 Hale 和 Albert(1)对我们最近发表的论文《饮用煮沸的自来水可降低人体对纳米塑料和微塑料的摄入量》(2)的关注和认可,并感谢 Hale 和 Albert 为我们提供了进一步澄清这个广受关注的话题的机会。首先,Hale 和 Albert 指出,煮沸水以有效去除纳米塑料和微塑料(NMPs)需要附加条件,这就强化了我们研究的观点:"由于全球范围内 NMPs 的发生率和水质参差不齐,煮沸水在减少 NMPs 方面的功效可能因地区而异"。我们的论文表明,自来水中的钙离子和碳酸氢盐/碳酸氢盐离子在煮沸后会形成碳酸钙(CaCO3)沉淀物,这些沉淀物会包裹并沉淀 NMP。沸腾软水(CaCO3 含量为 60 mg L-1)几乎不会产生沉淀物。因此,在供应软水的地区和安装了软水器或净水器的住宅中,去除 NMP 可能效果不佳。Hale 和 Albert 还怀疑软水器中的塑料部件和离子交换树脂可能会释放出 NMP。这种猜测是合理的,但仍没有确凿证据证实 NMP 会从家用软水器或净水设备中释放出来。公众应根据制造商的建议及时更换净水设备。此外,Hale 和 Albert 还提到,提高煮沸时的温度可能会加速 NMP 释放塑料添加剂。我们欣然承认这种可能性。高温可能会增加 NMP 在自然环境中和塑料包装材料中塑料添加剂的释放速度,这一点已在几项已发表的研究中得到证实。(3,4)不过,关于自来水煮沸后 NMP 中污染物的释放情况,目前仍存在知识空白。CaCO3 晶体具有较大的表面积和丰富的活性位点,不仅能有效吸附、包裹和沉淀 NMP,还能吸附、包裹和沉淀磷酸盐、重金属和苯等。(5,6) CaCO3 激励剂有可能成为沸水中塑料添加剂和/或其他污染物的捕集器,这值得通过专门设计的实验来进一步验证。除了去除 NMP 外,沸水还能杀菌、杀死寄生虫卵和消除消毒副产物,(7,8)使饮用沸水成为一种健康的习惯,尤其是在没有先进水处理设施的地区。我们鼓励开展更多研究,探讨煮沸对 NMP 和塑料添加剂的影响,为健康饮用水策略提供更好的指导。本文引用了 8 篇其他出版物。本文尚未被其他出版物引用。本文参考了其他 8 篇出版物。
期刊介绍:
Environmental Science & Technology Letters serves as an international forum for brief communications on experimental or theoretical results of exceptional timeliness in all aspects of environmental science, both pure and applied. Published as soon as accepted, these communications are summarized in monthly issues. Additionally, the journal features short reviews on emerging topics in environmental science and technology.