Smartphone-powered efficient water disinfection at the point of use
Smartphone-powered efficient water disinfection at the point of use
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DOI：
10.1038/s41545-020-00089-9
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发表时间：
2020-10
期刊：
影响因子：
11.4
通讯作者：
Jianfeng Zhou;Fang Yang;Yuxiong Huang;Wenbo Ding;Xing Xie
中科院分区：
文献类型：
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作者：
Jianfeng Zhou;Fang Yang;Yuxiong Huang;Wenbo Ding;Xing Xie
在没有集中供水设施的地区，没有细菌的清洁水是一种宝贵的资源。传统的氯消毒受到化学品运输、储存和致癌副产物产生的限制。在这里，开发了一种智能手机供电的消毒系统，用于使用点（POU）细菌灭活。该集成系统使用智能手机电池作为电源，并将一个定制的移动（OTG）硬件连接到手机上，以实现所需的电力输出。通过可下载的移动应用程序，可以通过屏幕上用户友好的图形界面轻松配置恒定电流（20-1000 μ a）或电压（0.7-2.1 V）的电输出。该消毒装置是一种同轴电极铜离子电池（CECIC），通过低能量消耗的低水平电化学生成的铜来灭活细菌。本研究采用恒流控制策略，解决以往恒压控制铜释放不可控的问题。采用电流控制，具有较高的失活效率。在盐浓度（0.2-1 mmol L - 1）范围内的水样中，低水平的流出铜（~200µg L - 1）可以达到大肠杆菌（~6 log）。基于智能手机的电源工作站通过简单的图形用户界面提供多功能和准确的电力输出。该消毒装置坚固、高效，不需要复杂的设备。随着智能手机在现代生活中无处不在，智能手机驱动的CECIC系统可以为农村地区和户外活动提供另一种分散的水消毒方法。
Clean water free of bacteria is a precious resource in areas where no centralized water facilities are available. Conventional chlorine disinfection is limited by chemical transportation, storage, and the production of carcinogenic by-products. Here, a smartphone-powered disinfection system is developed for point-of-use (POU) bacterial inactivation. The integrated system uses the smartphone battery as a power source, and a customized on-the-go (OTG) hardware connected to the phone to realize the desired electrical output. Through a downloadable mobile application, the electrical output, either constant current (20–1000 µA) or voltage (0.7–2.1 V), can be configured easily through a user-friendly graphical interface on the screen. The disinfection device, a coaxial-electrode copper ionization cell (CECIC), inactivates bacteria by low levels of electrochemically generated copper with low energy consumption. The strategy of constant current control is applied in this study to solve the problem of uncontrollable copper release by previous constant voltage control. With the current control, a high inactivation efficiency ofE. coli(~6 logs) is achieved with a low level of effluent Cu (~200 µg L−1) in the water samples within a range of salt concentration (0.2–1 mmol L−1). The smartphone-based power workstation provides a versatile and accurate electrical output with a simple graphical user interface. The disinfection device is robust, highly efficient, and does not require complex equipment. As smartphones are pervasive in modern life, the smartphone-powered CECIC system could provide an alternative decentralized water disinfection approach like rural areas and outdoor activities.