平面光极技术在水土环境精细化检测中的应用：实时捕获DO/pH/CO2的微区变化

       平面光极技术（PO）基于光电和荧光分析技术，可原位、实时获取环境指标的高分辨信息。在激发光照射下，光敏物质与分析物相互作用并伴随荧光信号（如：强度、寿命）变化，利用数字成像技术实时记录其二维特征发射光谱，将被测物质的浓度进行可视化呈现，分辨率可达亚毫米。

平面光极结构图

配套耗材

平面光极测量优势

1、实时、快速地获取微区DO/pH/CO2的分布；非侵入性成像测量，不破坏原生环境；

2、配备1250w(便携式)/2000w(封闭式)像素的CMOS相机，实现时间分辨率毫秒，空间分辨率亚毫米；

3、PO2100设备自带封闭式箱体，满足测定所需的暗室条件；

4、配套软件集成校准、获取图像、处理图像于一体，操作简单；

5、与其他高分辨技术具有互补性。

设备分析软件

实物场景及二维数据成像

案例一：苦草根际周围CO2浓度的时空变化

案例二：藻类从生长到分解过程中DO和pH的二维空间变化

案例三：随光照强度增加，植物根际溶解氧的动态变化

案例四：好氧、厌氧条件下溶解氧、pH的同步变化

案例五：底栖动物间歇性活动造成的水底土壤表层DO动态变化

案例六：苦草根系附近CO2的二维空间分布

平面光极 ▏文献导读：

1. Cai Li, Shiming Ding, Xin Ma,, et al., Sediment arsenic remediation by submerged macrophytes via root-released O2 and microbe-mediated arsenic biotransformation, Journal of Hazardous Materials, Volume 449, 2023, 131006, ISSN 0304-3894, doi.org/10.1016/j.jhazmat.2023.131006.

2. Yao He, Na Ding, Guo Yu, et al., High-resolution imaging of O2 dynamics and metal solubilization in the rhizosphere of the hyperaccumulator Leersia hexandra Swartz, Journal of Hazardous Materials, Volume 455, 2023, 131580, ISSN 0304-3894, doi.org/10.1016/j.jhazmat.2023.131580.

3. Zhilin Zhong, Cai Li, Musong Chen, et al., The Root Tip of Submerged Plants: An Efficient Engine for Carbon Mineralization, Environ. Sci. Technol. Lett. 2023, 10, 4, 385–390, doi. org/10. 1021/acs. estlett. 3c00065

4. Juan Lin, Mengling Liu, Sunling Zhuang, et al., Effects on the migration and speciation of heavy metals by combined capping and biochemical oxidation during sediment remediation, Science of The Total Environment, Volume 871, 2023, 162055, ISSN 0048-9697, doi.org/10.1016/j.scitotenv.2023.162055.

5. Cai Li, Shiming Ding, Musong Chen, et al., Visualizing biogeochemical heterogeneity in soils and sediments: A review of advanced micro-scale sampling and imaging methods. Critical Reviews in Environmental Science and Technology, 2023, 53(12), 1229–1253. doi.org/10.1080/10643389.2022.2128239

6. Li, X.-Y., Li, X.-Y., Jiang, Y.-F, et al., High-resolution chemical imaging to understand Cd activation in rice rhizosphere of karstic soils. Chemosphere, 2024, 349(140988), 1-10. doi.org/10.1016/j.chemosphere.2023.140988

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