The invention discloses a method for removal of uranium from wastewater with modified gangue, and the method is a novel representation of the utilization approach of mine solid waste. The main implementation steps include: (1) crushing and grinding gangue, and performing washing and drying to obtain gangue powder particles; (2) using acid and alkali for corresponding modification operation experiment on the prepared gangue powder respectively to form loose and porous powdery medium particles; and (3) placing the prepared medium particles with developed pores respectively in solutions containing heavy metal uranium under different acidic conditions, performing stirring for full contact reaction, and then testing heavy metal uranium in the leachate to obtain the result of acidic wastewater treatment with gangue as the adsorbent. The invention provides a novel approach for green, energy-saving and pollution-free treatment of uranium wastewater under different acidic conditions with ganguewaste, by contrasting the difference of adsorption performance under acid and alkali conditions, the method finds out the effective component for uranium adsorption, and provides the theoretical basis for directional modification.

Method for removal of uranium from wastewater with modified gangue

The invention discloses a novel sliding mode prediction fault-tolerant control algorithm for a multi-time-lag system with sensor faults. The sliding mode prediction fault-tolerant control method basedon an improved whale optimization algorithm is designed to overcome a fault-tolerant control problem of a multi-time-lag discrete uncertain system under the condition of sensor faults. A global sliding mode surface is designed as a prediction model to replace a traditional linear sliding mode surface, so that the global robustness of the system is ensured. For sensor faults and sliding mode buffeting, a power function reference trajectory with fault compensation is designed to weaken buffeting and obtain better robust stability. In the rolling optimization process, the improved whale optimization algorithm is designed, the optimization process can be prevented from falling into a local minimum value while high convergence speed and precision are achieved, and the early-maturing convergence problem is solved. The robust fault-tolerant control method is used for robust fault-tolerant control of the multi-time-lag discrete system with sensor faults.

Sliding mode prediction fault-tolerant control method for multi-time-lag system with sensor faults

The invention discloses an upflow anaerobic biological double-layer filter tank based on acidic uranium-containing wastewater treatment, and belongs to the field of uranium treatment field. The double-layer filter tank comprises a filter tank body, wherein the filter tank body comprises an outer isolation tank body and an inner isolation tank body; a cavity channel is formed between the outer isolation tank body and the inner isolation tank body; uranium absorption plants are planted in the through holes in the upper end of a dispersion layer; roots of the uranium absorption plants extend intothe inner side of the dispersion layer and the inner side of the cavity channel and are fully distributed on the inner side of the dispersion layer and the inner side of the cavity channel; regenerative uranium radiation isolation layers are formed on the inner side of the dispersion layer and the inner side of the cavity channel; and uranium radiation generated in the tank body is isolated through the regenerative uranium radiation isolation layers; trace uranium radiation generated in the tank body instead promotes growth and regeneration of tumbleweed roots to further reduce uranium radiation; compared with a simple concrete layer, the concrete layer with vegetation cultivation not only enhances the isolation effect of uranium radiation, but also reduces concrete materials and saves cost.

Upflow anaerobic biological double-layer filter tank based on acidic uranium-containing wastewater treatment

The invention provides a working device for electrolytic decontamination of surface-radioactively-contaminated metal. The working device comprises a crane, a power source system and a crane system, wherein a contaminated sample stage, a first ultrasonic cleaning device, a radioactivity/size measuring instrument, an electrolytic decontamination tank, a second ultrasonic cleaning device, a radioactivity measuring instrument and a decontaminated sample stage are sequentially arranged in the crane range, a titanium clamp is fixed on the crane, and the titanium clamp can move into the components through a crane slidway; the anode of the power source system is connected with the titanium clamp, a contaminated sample is clamped through the titanium clamp so that the contaminated sample can becomethe anode in the electrolytic decontamination process, and the cathode of the power source system is connected with the electrolytic decontamination tank; the crane system is used for controlling thecrane to realize the up-down and left-right movement of the titanium clamp and the process of clamping or releasing the sample. According to the working device, the cleaning, radioactivity measurement, size measurement and electrolytic decontamination of the contaminated sample are realized through the clamp arranged on the crane, remote operation is realized to protect the health of staff, and continuous operation can be realized to improve the efficiency.

Working device for electrolytic decontamination of surface-radioactively-contaminated metal

The invention discloses a decontamination treatment system for decommissioning of a nuclear facility. The decontamination treatment system comprises a decontamination treatment base body, an electrochemical decontamination tank arranged on the decontamination treatment base body, electrodes arranged in the electrochemical decontamination tank, an electrochemical power supply connected with the electrodes, a water inlet part and a water discharge part arranged in the side wall of the electrochemical decontamination tank, and an ultrasonic decontamination treatment device arranged below the electrochemical decontamination tank and can communicate with the electrochemical decontamination tank. Compared with the prior art, the decontamination treatment system for decommissioning of a nuclear facility has the following advantages that the generation amount of secondary wastes is low, and decontamination efficiency is remarkably improved.

Decontamination treatment system for decommissioning of nuclear facility

The invention relates to a preparation method of a modified river sand adsorbent and application thereof. The preparation method of the modified river sand adsorbent comprises the following steps: cleaning collected river sand, and performing drying, pulverization and sieving on the river sand to obtain river sand powder; mixing the river sand powder with a sodium hydroxide solution with concentration of 0.1 to 3mol/L based on the proportion of the mass to a volume ratio is (1 to 1) to (1 to 6) to obtain a mixture; putting the mixture in a constant-temperature oscillator to be oscillated for 1to 24 hours at a temperature of 20 to 30 DEG C at oscillation speed of 150 to 200r/min; filtering the river sand soaked with the sodium hydroxide solution, performing air-drying or drying under a natural condition, and putting in a muffle furnace of 550 to 850 DEG C to be roasted; making the roasted river sand cool by spreading so as to obtain the modified river sand adsorbent. The adsorbent prepared by the preparation method is applied to uranium-containing wastewater treatment; the prepared modified river sand adsorbent is put into uranium-containing wastewater of which a pH value is 2 to 6; the concentration of uranium in the uranium-containing wastewater is 1 to 50mg/L; the input quantity of the adsorbent is 8 to 60g/L; uranyl ions are removed when oscillation is carried out for 1 to24 hours in the constant-temperature oscillator.

Preparation method of modified river sand adsorbent and application thereof

The invention discloses a quick-grading accurate positioning method and device for wireless sensor network nodes, equipment and a readable storage medium. Aiming at the problems of low efficiency andlow positioning precision of a traditional node positioning scheme, a curve distance analysis method is firstly used for roughly positioning a node to be positioned to obtain a rough relative coordinate so as to improve the node positioning efficiency; the relative coordinates are converted into absolute coordinates by utilizing linear transformation; and finally, global and local search optimization processing is performed on the to-be-positioned node through adoption of an adaptive Levy flight whale optimization method, so that the positioning precision is improved, and the purpose of improving the positioning efficiency and the positioning accuracy at the same time is achieved.

Quick-grading accurate positioning method and device for wireless sensor network nodes

The invention relates to a preparation method and application of an adsorbent for treating uranium-containing wastewater The adsorbent for treating uranium-containing wastewater is obtained by modifying brick powder The preparation method comprises the following steps: crushing and sieving washed and dried bricks to obtain brick powder; mixing the brick powder and a 05-3mol/L sodium hydroxide solution according to a mass to volume ratio of 1 to (1-5); shaking the mixture of brick powder and sodium hydroxide solution in a constant temperature oscillator for 2 to 24 hours for modification toobtain modified brick powder; filtering the modified brick powder, air-drying or baking under natural conditions, so as to obtain the adsorbent for treating uranium-containing wastewater The adsorbent is added to the uranium-containing wastewater, and then is placed in the constant temperature oscillator for shaking adsorption for 1 to 24 hours to adsorb and remove uranyl ions in the water

Preparation method and application of adsorbent for treating uranium-containing wastewater

The invention discloses a wireless sensor network clustering routing method, device and equipment based on improved genetic tabu search and a readable storage medium. According to the scheme, in orderto prevent some nodes in the wireless sensor network from failing due to excessive energy consumption earlier than other nodes, nodes are periodically selected to serve as cluster head nodes, optimalsearching is performed on a transmission path between the target cluster head node and the base station by utilizing a genetic algorithm and a tabu search algorithm. The genetic algorithm iteration ensures global convergence, the tabu search algorithm iteration ensures diversity and local convergence, the genetic algorithm iteration and the tabu search algorithm iteration are combined to have good global and local search capabilities, and the balance of energy loss of each node in the network is considered in the optimization process to ensure the network life cycle. And finally, the target cluster head node is controlled to route according to the optimal transmission path, so that the purposes of reducing the energy loss of the network node and improving the whole network survival periodare achieved.

Peng Guowen

Papers

Decontamination treatment system for decommissioning of nuclear facility

Preparation method of modified river sand adsorbent and application thereof

Quick-grading accurate positioning method and device for wireless sensor network nodes

Preparation method and application of adsorbent for treating uranium-containing wastewater

Deep well roadway WSN clustering routing method and device for improving genetic tabu search