Magnetic environment repair material, preparation method and application based on waste toner cartridge
A technology of environmental remediation and toner, which is applied in the field of environmental remediation, can solve the problems of strong toxicity of organic substances, water and soil pollution, and damage to the ecological environment, etc., and achieves the advantages of large-scale production, simple preparation process, and controllable operation. Effect
Active Publication Date: 2020-05-22
YANGZHOU UNIV
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Problems solved by technology
The residual amount of toner in a waste toner cartridge is about 7.8%, and the amount of residual toner is nearly 7500t. The particle size of the toner is only about 5-12μm, and the main components are polyacrylate-styrene, polyethylene / polypropylene paraffin, hydroxyl Aromatic acid derivatives, ferric oxide, silicon dioxide, etc., the organic substances in the toner are highly toxic. If they are discarded without treatment, they are easy to float in the atmosphere and will be inhaled into the human respiratory tract under frequent contact. and lungs, seriously affecting human health, and at the same time causing serious pollution to water and soil, destroying the ecological environment
Method used
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Embodiment 1
[0036] The first step is to collect waste toner cartridges through procedures such as crushing, magnetic separation, winnowing, and high-pressure cleaning to collect black powder and remove impurities to obtain a single waste toner (WTs). The scanning electron microscope image is as follows figure 1 (a) shown.
[0037]In the second step, the waste toner was calcined in a tube furnace at 600°C for 2h in an ammonia atmosphere (300-400mL / min), and the heating rate was 5°C / min to obtain WTs(NH 3 ), and its scanning electron micrograph is shown in figure 1 (d) shown.
[0038] WTs(NH 3 ) dosage is 4 g / L, the initial concentration of Cr(VI) prepared by potassium dichromate is 50 mg / L, shaken at constant temperature for 7 hours, and the rotating speed is 200r / min, and the pH value of the solution is adjusted to 2 with HCl. The removal rate of Cr(VI) is about 78%, with H 2 SO 4 The pH value of the solution was adjusted to be 2, and the removal rate of Cr(VI) was measured to be a...
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Abstract
The invention discloses a magnetic environment restoration material based on waste toner cartridge toner, a preparation method and its application. In the method, waste toner cartridges are collected through procedures such as crushing, magnetic separation, winnowing, and high-pressure cleaning to remove impurities. A single waste toner is obtained; the waste toner is calcined at a high temperature under an ammonia atmosphere, and the calcined product is magnetic nanometer ferroferric oxide and a small amount of silicon dioxide. The magnetic nano-environment restoration material obtained by the present invention is easy to obtain, the preparation process is simple, the operation is controllable, it has good magnetic properties and strong adsorption and reduction ability, and can efficiently remove heavy metal Cr(VI) in water, and reaches the level of waste toner The purpose of resource utilization.
Description
technical field [0001] The invention relates to an environmental restoration material for removing heavy metals in water bodies and soil environments and a preparation method thereof, in particular to a magnetic environmental restoration material prepared by using waste toner cartridge toner and a method thereof, belonging to the field of environmental restoration. Background technique [0002] With the rapid development of the electronics industry, the use of laser printers and copiers is very popular. Among them, laser printers account for about 30% of the market share. Modern offices have a greater demand for their accessories. As a necessary consumable for laser printers, toner cartridges are discarded. The amount is also increasing. According to statistics, in 2010, the number of waste toner cartridges in my country has reached 75 million. The residual amount of toner in a waste toner cartridge is about 7.8%, and the amount of residual toner is nearly 7500t. The particle...
Claims
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IPC IPC(8): C09K17/04B09C1/08B01J20/06B01J20/28C02F1/28C02F1/70B01J20/30C02F101/20C02F101/22
CPCB01J20/06B01J20/28009B09C1/08C02F1/281C02F1/70C02F2101/20C02F2101/22C09K17/04
Inventor 王小治朱红尹微琴王圣森侯建华封克
Owner YANGZHOU UNIV