Hefei Institute of Chinese Academy of Sciences: progress in heavy metal ion detection research
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Determination of Pb(II), Cd(II), Hg(II) and Cu(II) by irradiated attapulgite-ionic liquid complexes
The researchers first used high-energy electron beams to irradiate attapulgite. By optimizing the irradiation parameters and a series of characterizations, the attapulgite-ionic liquid composite was used to construct the electrode materials. At the same time, Pb(II), Cd(II), and Hg were used. (II) and Cu(II) were separately and simultaneously electrochemically detected. The dissolution behavior was analyzed and compared. It was found that the sensitivity and detection limit of the two assays were changed to different degrees. In the simultaneous detection, the detection limit and sensitivity of the composite materials on Hg(II) and Cu(II) were significantly improved, while the detection effect on Pb(II) and Cd(II) was reduced, among which Pb( The detection limits of II), Cd(II), Cu(II), and Hg(II) were 0.8, 0.5, 0.2, and 0.06 nM, respectively, while the sensitivity to Hg(II) was as high as 242.4 μA/μM.
The work has a certain reference value for the study of a variety of heavy metal ions and the detection of heavy metals in actual soil, and also provides a reference for the detection and analysis of a variety of heavy metal ions. The relevant research results were published in Chemical Engineering Journal 316 (2017) 383–392. The above research work was supported by the National Natural Science Foundation of China and the Institute of Technology Biology.
(Original title: Hefei Research Institute made progress in detection and analysis of heavy metal ions)
The hydraulic cylinder of an excavator is an important component, mainly used to control the movement of the excavator's mechanical arm, stick, bucket head, and other parts. Specific application scenarios include:
1. Construction engineering: Excavator hydraulic cylinders can be used for excavation and transportation of earthwork, excavation of foundation pits, road construction, pipeline laying, and other construction projects.
2. Mining: Excavator hydraulic cylinders can be used for ore mining, blasting, transportation, and loading in mining.
3. Agricultural production: excavator hydraulic cylinder can be used for Land consolidation, irrigation and drainage, ditch excavation, crop harvesting and other work in agricultural production.
4. Hydraulic engineering: Excavator hydraulic cylinders can be used for river dredging, embankment construction, reservoir construction, and other work in hydraulic engineering.
5. Garbage treatment: The excavator hydraulic cylinder can be used for garbage cleaning, compression, transportation, and landfill in garbage treatment.
In summary, excavator hydraulic cylinders are widely used in various engineering and production fields, and are important tools for improving work efficiency and production efficiency.