What is hazardous waste? What are its characteristics?

Hazardous waste: Hazardous waste refers to the waste with hazardous characteristics listed in the national hazardous waste list or identified according to the national hazardous waste identification standards and methods. Characteristics: corrosiveness, toxicity, flammability, reactivity, infectivity and danger.

Introduction: With the development of industry, hazardous waste discharged in the process of industrial production is increasing. It is estimated that the annual output of hazardous waste in the world is 330 million tons. Hazardous waste is called "political waste" in industrialized countries because of its serious pollution and potential serious impact. The public is very sensitive to the problem of hazardous waste and opposes the establishment of hazardous waste treatment plants in their own areas. In addition, the disposal cost of hazardous waste is very high, and some companies try their best to transfer hazardous waste to countries and regions with underdeveloped industries.

Definition: According to the definition in the National Hazardous Waste List, hazardous waste refers to waste with one or more hazardous characteristics such as corrosiveness, toxicity, flammability, reactivity or infectivity; It is not excluded that it is dangerous and may have harmful effects on the environment or human health, so it needs to be managed according to hazardous waste.

Harm: Destroy the ecological environment: Hazardous wastes discharged and stored at will will pollute water and soil under the long-term infiltration and diffusion of rainwater and groundwater, and reduce the environmental function level of the region. Impact on human health: hazardous wastes are poisoned through ingestion, inhalation, skin absorption and eye contact, or lead to dangerous events such as burning and explosion; Long-term hazards include long-term poisoning, carcinogenesis, teratogenesis and mutation caused by repeated contact. Restrict sustainable development: air, water and soil pollution caused by untreated or irregular treatment and disposal of hazardous wastes will also become the bottleneck restricting economic activities.

Recycling: Environmental protection regulations or laws and regulations should be formulated together with relevant enterprises that produce hazardous wastes, so that they can be carefully observed. The government should allocate some funds to support enterprises to develop ways to reuse or treat waste. The government should plan the land use plan for the enterprises that produce hazardous waste, and shall not affect the water source, environment, distance from residential areas and other relevant measures.

Disposal: Which best and practical method to choose for a certain waste is related to many factors? For example, the composition, nature, state, climatic conditions, safety standards, treatment costs, operation and maintenance of waste. Although many methods can be successfully used to treat hazardous waste, the common treatment methods are still classified as physical treatment, chemical treatment, biological treatment, heat treatment and solidification treatment.