In recent years, there have been frequent reports of marine pollution, and countries around the world have paid more and more attention to the protection of the marine environment. my country is a big maritime country, with more than 18,000 kilometers of continental coastline and an area of nearly 3 million square kilometers of ocean. With the rapid development of the marine economy, marine oil spill accidents frequently occur, and the oil film floating on the water surface after the spill accident occurs. It will consume the dissolved oxygen in the water body and destroy the balance of the water body ecosystem. At the same time, after the refractory organic matter in the oil film is absorbed by aquatic organisms, it will be enriched in the aquatic organisms and enter the food chain and eventually endanger human health. At present, marine oil spills have become a worldwide concern. major issues.
How to solve the urgent need in the field of marine and river water pollution emergency disposal technology? Let's first understand the current status of the disposal of oil spills:
after the oil spill occurs, first surround it with an oil boom to prevent it from spreading on the surface of the water body, and then use mechanical treatment, chemical treatment, and bioremediation technology. , combustion treatment method, adsorption treatment method and other technologies to clean up the oil slick, in which the adsorption treatment is to use oil absorbing felt, oil absorbing blanket, etc. to adsorb and remove the oil film floating on the surface of the water body.
Traditional adsorption materials are mainly divided into two categories:
(1) Natural adsorption materials: sawdust, straw, chaff, feathers.
(2) Synthetic adsorption materials: polypropylene, polyurethane foam, oil-absorbing resin.
Synthetic adsorbents have better adsorption properties than natural adsorbents, but they still have obvious shortcomings in the adsorption process.
Through years of research and development of graphene materials by researchers, it is found that graphene materials have many advantages such as good oil absorption, high oil retention, low solubility, and low sedimentation after preparation.
Fast adsorption rate: The oil absorption rate is 2.2 times that of traditional oil-absorbing felt.
High adsorption rate: 1 gram of material can absorb 80 grams of crude oil and absorb less than 5 grams of water.
Good retention: 20 ℃, oil retention rate of more than 80%.
Low cost: The new graphene material has a larger oil absorption under the same cost condition.
Resource reuse: After the oil absorption reaction, the material can be reused to make self-lubricating materials.
Environmental protection: It has no pollution to water quality, and has passed the evaluation of the Environmental Protection Center of the Ministry of Transport.
How are graphene products with super adsorption capacity prepared?
Graphene adsorption material is made of natural flake graphite raw ore through intercalation treatment. After high temperature expansion, graphene adsorption material can be obtained. Under the microscope, it has a loose worm-like structure and is an emerging environmentally friendly adsorption material.
With only one container of equipment, the graphene oil purification material can be prepared on-site at sea, and N containers of products can be produced.
Graphene is ideal for printing conductive tracks and regions onto flexible surfaces, such as plastic sheets, paper or fabric.
Graphene UV Sensor Patch: Wearable, real-time UV sensing for smart skin protection.
1. Graphene adsorption material products
The oil absorbing bag has the advantages of small size, convenient use and fast adsorption speed. has a significant effect.
The oil absorbing blanket increases the contact area with oil substances on the basis of the oil absorbing bag, which can quickly absorb and store oil liquids, effectively prevent the spread of leakage, and is suitable for oil spill treatment in oil depots, shipyards and factory docks.
Oil-absorbing felt has the characteristics of high oil absorption ratio, no deformation after full oil absorption, no looseness, and easy salvage.
The oil absorption cable has the characteristics of good flexibility, high strength, high oil absorption rate and oil absorption, and has the function of containment and recovery of oil spills on the water surface. The buckle can quickly connect the oil suction cable according to the demand, which is suitable for quick response to a large-scale sudden oil spill accident.
2. Complete sets of emergency disposal equipment for oil spills and hazardous chemicals
The complete set of emergency disposal equipment for oil spills and hazardous chemicals can realize on-site preparation and on-site delivery of graphene adsorption materials.
This equipment can expand graphite raw materials, and 1g of raw materials can reach 250ml after expanding. Compared with the traditional emergency disposal methods, this equipment completely subverts the emergency disposal mode of adsorption products out of storage, transportation, and on-site delivery, and reduces the transportation of adsorption products. The number of required equipment, one equipment can realize the role of multiple transport ships in the traditional way.
The equipment can be controlled by one button from opening to closing, and can be operated by one person, which is convenient, fast and reliable, and saves labor costs. At the same time, it can realize remote monitoring and ensure the safe and stable operation of the equipment.
3. Recovery of oil spills and hazardous chemicals emergency disposal methods
How to recycle the saturated materials floating at sea after adsorption, researchers have developed a powerful recycling and disposal device.
The equipment first automatically salvage saturated adsorption products, transported by crawler to crusher for crushing, transported by screw conveyor to extruder to achieve solid-liquid separation of crushed saturated adsorption products, and then the solid waste is stored in bags for self-lubricating Material preparation, oil-water separation and purification of liquid waste, and oil products can be reused.
Compared with the traditional recovery methods of oil spills and hazardous chemicals emergency disposal methods such as artificial salvage, coastal accumulation, transportation leakage, open burning and other treatment methods, the development of integrated container-type sea surface adsorption products cleaning and recycling and clean packaging equipment has been successfully realized. The purpose of efficient salvage, environmentally friendly disposal and waste reuse of saturated adsorption products at the emergency disposal site is achieved.
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