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How Should We Deal with Hazardous Waste?
Transcript of How Should We Deal with Hazardous Waste?
reduce by producing less hazardous waste
covert to less hazardous or nonhazardous substances
place the rest of the waste in long-term, safe storages In some countries where E-waste is recycled, workers (mostly children) are exposed to harmful chemicals and dangerous working conditions.
Some cities, like Guiyu, have chemical levels 86 times as high as the WHO standards. This is a result of E-waste recycling plants. Recycling E-Waste The first step is to collect the waste. Then its taken to treatment facilities where 3/4 of the waste is detoxified
physically- includes using charcoal or resins to filter out harmful solids and distilling liquid mixtures to separate out harmful chemicals
chemically- used to convert hazardous chemicals into harmless or less harmful chemicals. This can be done using nanomagnets or with a plasma arc torch
and biologically- This can be done through bioremediation or phytoremediation. We Can Detoxify Hazardous Waste We Can Store Some Forms of
Hazardous Waste About 5% of all hazardous waste produced in the United States is regulated under the Resource Conservation and the Recovery Act (RCRA).
Cradle-to-grave system is a system used to keep track of waste they transfer from a point of generation (cradle) to an approved disposal facility (grave).
CERCLA (Comprehensive Environmental Response, Compensation, and Liability Act) aims to identify sites where hazardous wastes have contaminated the environment. Underground injection well E-Waste
Recycling Plant Storing waste should be a last resort when it comes to hazardous waste, but it is the most widely used method. The most common form of burial is deep-well disposal.
Deep-well disposal is when liquid waste is pumped through a pipe into dry, porous rock formations far beneath aquifers.
Surface Impoundments are ponds, pits, or lagoons where liners are placed and liquid hazardous wastes are stored. (As the water evaporates, the waste settles and becomes more concentrated)