TECHNOLOGY FOCUS - INORGANIC CHEMISTRY - Preferred Components: The absorbent comprises potassium hydroxide and/or sodium hydroxide.    TECHNOLOGY FOCUS - INSTRUMENTATION AND TESTING - Preferred Components: The irradiation reaction box is a double-layer flat box structure. The first layer is an irradiation reaction layer and the depth is 50 mm for facilitating the liquid to be processed to pass through and receiving irradiation of the electronic beam, and the other layer is a cooling water circulation system, where the depth is 20 mm. The cooling water enters from the upper port of the irradiation reaction box and flows from the lower port and flows inversely with the liquid to be processed, and two layers share the middle plate and each layer is provided with an independent liquid inlet/outlet. The internal part of the irradiation reaction layer is divided into seven cells, each cell is serially connected with adjacent cell through a slot and connected end to end, and hence the liquid to be processed in the flowing process is automatically and uniformly mixed. An inlet temperature sensor is arranged at the upper port of the cooling water circulation system. An outlet temperature sensor is arranged on the lower port. The cooling circulating water temperature is monitored by a temperature sensor, and the size of the cooling circulating water is adjusted in real time according to the temperature of the cooling circulating water. The electronic beam source of the irradiation degradation device is cut off when the temperature of the cooling circulating water exceeds the preset temperature. The pressure sensor is arranged in the internal part of the irradiation reaction box. The compression pump at the liquid inlet is automatically started when the pressure sensor senses that the liquid inlet pressure of the irradiation reaction box is not enough and the flow speed of the liquid to be processed is increased and mixed fully. The irradiation degradation device further comprises a liquid level control sensor, which is connected with the mixer. The rotation of the injection pump is automatically stopped through the liquid control sensor when the liquid in the mixer exceeds preset upper limit of the alarm liquid. The injection pump is opened to rotate through the liquid level control sensor and the liquid is injected into the mixer when the liquid in the mixer is lower than the preset upper limit of the alarm liquid.    TECHNOLOGY FOCUS - ORGANIC CHEMISTRY - Preferred Components: The solvent comprises isopropanol and/or ethanol. The liquid to be processed comprises polychlorinated biphenyl, organochlorine insecticide and polybrominated diphenyl ethers.