On the wall of the house is written: Ion exchange method for treating nickel-containing wastewater. Nickel is a precious metal and can be recovered using ion exchange. Nickel in wastewater mainly exists in the form of Ni2+, and cation exchange resin can be used. Strong acidic resins are low-priced, have good mechanical strength and chemical stability, but have poor exchange and regeneration performance, while weakly acidic resins have good exchange capacity and regeneration performance, as well as good selectivity, but are more expensive and have poor mechanical strength. Currently, they are generally used Weakly acidic cationic resin uses a fixed-bed double cation column in series with a fully saturated process.
Nickel plating is used as the substrate coating for precious metals and base metals. It is also commonly used as the surface layer for some single-sided printed boards. For some surfaces that are subject to heavy load wear, such as switch contacts, contacts or plug gold, using nickel as the gold substrate coating can greatly improve the wear resistance. When used as a barrier layer, nickel effectively prevents diffusion between copper and other metals.
When cyanide copper plating wastewater breaks down cyanide, copper ions are converted into fine precipitate particles of basic copper carbonate. It is necessary to add a large amount of coagulant to adsorb, and then add flocculant to precipitate and separate.
A laminated product is made of alkali-free glass cloth impregnated with epoxy phenolic resin and hot-pressed, with one or both sides covered with copper foil. The board surface is light yellow. If melamine is used as the curing agent, the board surface will be light green and has good transparency. Mainly used as printed circuit boards in radio equipment with higher operating temperatures and operating frequencies.
In the chip manufacturing laboratory, Yang Yuling is using extracted copper and nickel, as well as other materials already available in the laboratory, to manufacture circuit boards. If you put a self-assembly chip and a solution element, you can let it communicate with nearby self-assembly chips.
In the control room next to the extraction equipment, there is an instruction sign on the wall. Extraction: The process of separating a mixture by using the difference in solubility of substances in different solvents is called extraction in chemical industry.
In the desk drawer of the control room, I saw the instruction manual. On the last page, trapezoids, cylinders, and circles were drawn. Can this be understood? The trapezoid corresponds to the tower type, the cylindrical shape corresponds to the tank type, and the circle corresponds to the centrifuge type.
They walked around the extraction equipment several times and saw a photoelectric probe near each equipment. It's small and not easily noticeable. Follow the instructions in the instruction manual and pass through each photoelectric probe to make the sound of the relay closing.
Maybe it's another password lock.
After passing all the equipment indicated in the manual, a hidden compartment opened behind the control room, revealing a magnetic card.
The method of using membranes to separate certain substances in aqueous solutions is called membrane separation. Membrane separation methods can be divided into diffusion dialysis (referred to as dialysis), reverse osmosis and ultrafiltration, electrodialysis, etc.
Ultrafiltration, also known as ultrafiltration, uses a membrane with a certain pore size to intercept macromolecular substances and particles in the solution, while the solvent and low molecular substances in the solution can pass through the membrane to achieve the purpose of separation. In addition to the mechanical interception and physical screening of the membrane surface pore size, the ultrafiltration process can generally be considered to include the adsorption of solutes on the membrane surface and the micropore walls. When the solute particle size is equivalent to the membrane pore size, the solute is embedded in the pores. blocking effect, etc. Screening and interception are the main forms of ultrafiltration. We should strive to avoid adsorption on the pore walls and blockage of the membrane pores. We should choose a membrane with weak interaction with the separated solute and an asymmetric membrane structure that is dense on the outside and sparse on the inside. The structural membrane used for ultrafiltration is called an ultrafiltration membrane. Ultrafiltration is actually a kind of dynamic filtration. Under the action of external force, the separated solution flows along the surface of the ultrafiltration membrane at a certain flow rate. The solvent and low molecular substances continuously pass through the ultrafiltration membrane and are discharged as filtrate, while the solution Polymer substances, colloids and microorganisms are retained by the ultrafiltration membrane, and the solution is concentrated. When low molecules and solvents pass through the ultrafiltration membrane, it is easy to cause the concentration of macromolecule substances on the membrane surface to continue to rise and form a concentration difference with the main fluid. , this phenomenon is called concentration polarization of the membrane.
It turns out that this magnetic card is used to open the door of the ultrafiltration laboratory. The key is used to start the ultrafiltration device. After the antacid passes through this equipment, the antacid with relatively high purity is extracted.
Generally speaking, antacids go through filtration equipment to extract antacids with relatively high purity.
Acid hydrolysis, neutralization reaction occurs with alkaline substances to generate hydrolytic salts.
Using an electrolytic cell, an oxidation-reduction reaction occurs between the decomposed salt and iron to generate decomposed substances and iron salts. This is how matter is understood.
In the electrical laboratory, circuit boards are made from extracted copper and nickel, as well as other materials already available in the laboratory. Put the self-assembly chip and the solution element. Let it communicate with nearby self-assembling chips.
Gao Zhouzhi said: "Why can communication be enabled by adding this element?"
Luo Shao said: "Maybe it's just an agreement. Two identical elements must be put in before they can communicate."
Yang Yuling said: "Maybe it has an effect on the transmission of signals. It changes its transmission frequency."
In some cases, adding certain substances may interfere with or absorb wireless communication signals, thereby affecting the quality and transmission distance of wireless communication. For example, some materials may have a strong absorption effect on signals at specific frequencies, causing the signal strength to weaken or the transmission distance to shorten.
Certain substances may also affect the transmission frequency of wireless communications. For example, water molecules have a strong absorption effect on high-frequency signals, so when wireless communication is performed underwater, it is usually necessary to use lower frequencies or other communication methods, such as ultrasonic communication.
Wireless transmitters in electrical laboratories can scan surrounding devices and self-assembled chips by sending radio signals, and send command signals to control their behavior. The wireless transmitter communicates with the self-assembled chip using specific coding and protocols to send command signals to the self-assembled chip and control its behavior.
When the wireless transmitter scans the self-assembly chip, it sends a command signal to the self-assembly chip that contains instructions on how to move or perform a specific task. After receiving this signal, the self-assembly chip will parse the instructions and perform corresponding actions.
If the self-assembling chip completes its mission or needs to return to the console, it can scan to the wireless transmitter again and send a return command. This return command tells the wireless transmitter that the self-assembly chip has completed its task or needs to return to the console.
Originally, self-assembled chips were moved with construction vehicles. But after the self-assembled chip came back, the truck body being dragged behind it was empty, and the vehicle construction materials were missing.
But fortunately, the solution elements and self-assembled chips were recovered.
