From the "M² Memories in Materials" art practice collection plan launched at the end of 2017 to the final finalist list, the comprehensive upgrade project of Dongchang Cinema is also underway. The material and non-material materials left by the cinema are the spiritual umbilical cord between us and the past, connecting, transmitting, and transmitting to the new future – making Dongchang Cinema a new generation of cultural memory.
Dongchang Encyclopedia is a series of UNArt's research topics on Dongchang Cinema Materials. Through the review and interview of architecture, video, community and human history, the memories that have dissipated in the fog of time will be re-constructed.
Chinese name: 旧电池 English name: Wasted Battery
Details: metal casing, containing the positive and negative points, the shell is slightly corroded
Uses: Convert chemical energy into electrical energy, and stabilize power supply for various electrical devices
Features: easy to carry, power supply is affected by the outside world, containing various metal substances such as mercury, manganese, cadmium and lead
Battery means a space in a cup, tank or other container or composite container containing an electrolyte solution and a metal electrode to generate electrical current, a device capable of converting chemical energy into electrical energy. By using the battery as an energy source, it is possible to obtain a stable voltage, a stable current, a stable power supply for a long time, and convenient and reliable carrying performance, and play a great role in various aspects of modern social life.
Old batteries are batteries that have been used and discarded. The environmental impact of old batteries and their treatment methods are still controversial. Many people think that old batteries are seriously harmful to the environment and should be collected in a centralized manner.
Hazard: 96% of the batteries produced in China are zinc-manganese batteries and alkaline-manganese batteries. The main components are heavy metals such as manganese, mercury and zinc. Waste batteries, whether in the atmosphere or buried deep underground, their heavy metal components will overflow with the seepage, causing pollution of groundwater and soil, which will seriously endanger human health. In 1998, the National Hazardous Waste List identified mercury, cadmium, zinc, lead and chromium as hazardous wastes.
Development: Almost all developed countries currently prohibit the addition of mercury to batteries. In some developed countries, battery (sub) industrial associations and individual cities have organized ordinary dry battery collection activities. There is one waste battery recycling plant in Japan and Switzerland. Germany placed the collected waste batteries in abandoned pits. Nickel-metal hydride batteries and lithium batteries are gradually replacing nickel-cadmium batteries. In some countries, the Electronics Manufacturers Association has carried out the recycling of rechargeable batteries, and the effect is also remarkable. This is mainly because the total consumption of rechargeable batteries is relatively small (compared to ordinary dry batteries); the application range is small, and it is easy to collect by trade-in; the recovery value is high.
Old battery with water
On November 9, 1939, a brain hospital in Kanagawa Prefecture, Japan, took in an unconscious man. At the beginning of the man's onset, there was only an unexplained edema on the ground. After the development, he became unconscious. After being sent to the hospital, the man was finally in extreme pain and died of heart failure.
The investigation revealed that it was caused by drinking water contaminated with waste batteries. A button battery can pollute 600,000 liters of water, which is equal to the amount of water a person has in a lifetime, so it is not too much to say that a section of used batteries is a "pollution bomb".
Old battery meets soil
A battery is rotten in the ground, which can make one square meter of land useless. The ordinary dry batteries we use every day mainly include acid zinc-manganese batteries and alkaline zinc-manganese batteries. They all contain various metal substances such as mercury, manganese, cadmium, lead, zinc, etc. After the discarded batteries are abandoned, the outer casing of the battery will Slowly corroded, heavy metal substances will gradually penetrate into the soil, causing pollution. The biggest characteristic of heavy metal pollution is that it cannot be degraded in nature and can only be eliminated by purification.
Wasted Battery caught fire
On July 17, 2012, a fire broke out in a scrap yard near the old middle of the road at the Qingzhou Riverside Road in Macau. A group of open-end stored batteries suddenly caught fire. The fire was once fierce and a lot of smoke was emitted. The firefighting received the report and was put out in time. The fire broke into a truck on the mountain. Fortunately, it did not cause mountain fires or affected the houses. Fire suspected waste battery continued to expose to the sun and leakage caused a fire, no one was injured in the incident. Residents of the area hope that the waste yard personnel will properly store the old batteries.