Dry-cell batteries include alkaline and carbon zinc (9-volt, D, C, AA, AAA), mercuric-oxide (button, some cylindrical and rectangular), silver-oxide and zinc-air (button), and lithium (9-volt, C, AA, coin, button, rechargeable). On average, each person in the United States discards eight dry-cell batteries per year. Secondary batteries (rechargeable) include lead-acid, nickel-cadmium, and potentially nickel-hydrogen. Americans purchase nearly 3 billion dry-cell batteries every year to power radios, toys, cellular phones, watches, laptop computers, and portable power tools.
In landfills, heavy metals from batteries have the potential to leach slowly into soil, groundwater or surface water. Dry cell batteries contribute about 88 percent of the total mercury and 50 percent of the cadmium in the municipal solid waste stream. In the past, batteries accounted for nearly half of the mercury used in the United States and over half of the mercury and cadmium in the municipal solid waste stream. When burned, some heavy metals such as mercury may vaporize and escape into the air, and cadmium and lead may end up in the ash.
Using rechargeable batteries are one way to cut down on toxic waste caused by the reckless disposal of batteries. These are known as secondary cell batteries and are commonly used for cameras, rechargeable appliances such as portable power tools, camcorders, computers, portable radios and tape players, cellular phones and other hand held devices. Unfortunately there are not many ways to recycle non-rechargeable batteries and most get discarded as waste. However the use of rechargeable batteries such as Nickel cadmium (NiCd), nickel Metal Hydride (NiMH) and Lithium Ion (Li?ion) is increasing at a rapid pace. These batteries last longer. They should also be recycled. The NiCd battery is one of the more hazardous batteries in terms of disposal. If used in landfills, the cadmium will eventually dissolve itself and the toxic substance will seep into the water supply, and into the food chain causing serious health problems. Our oceans are already beginning to show traces of cadmium along with other toxins, but the source of the contamination is unknown. Under no circumstances can batteries be incinerated as this can cause them to explode. Although NiMH batteries are considered environmentally friendly, this chemistry is also being recycled. The main derivative is nickel, which is considered semi-toxic. NiMH also contains an electrolyte that, in large amounts, is dangerous to the environment.
Other Electronic E-Waste:
There is other electronic waste or e-waste that many people throw out. Stereos, clocks, alarm clocks, radios, watches, hairdryers, smoke detectors, lamps, portable heaters and other consumer electronics are being thrown out at a record pace.
Smoke alarms are items we need to discard of properly. The most common type of smoke detector contains a small amount of Americium 241, a radioactive material. On your wall this presents little threat. When broken open in an incinerator or landfill, the material can pose a serious health hazard. Also we throw away a lot of damaged and unwanted CDs. Damaged CD's can be repaired, and repair or reuse is definitely a better environmental option than recycling. Obsolete or unrepairable CD's can be recycled. Also we have thrown away unwanted vinyl records that we no longer use along with cassettes and other sources that hold media.
We normally dispose off used light bulbs along with the household garbage which is dumped in landfills. By disposing of this e-waste in this manner toxins are released in the air and gradually reach our water system. CFL or Compact Flourescent Bulbs are dangerous if not disposed of properly. Even though they lower greenhouse gas emissions but a used CFL bulb contains hazardous componds and if a bulb breaks at home harmful compounds are released. It contains mercury vapour which is injurious and poisonous. Mercury in any form is injurious to humans and can lead to serious complications including impairment of the nervous system, major organs and numerous other ailments including effecting brain development in children.
The amount of this e-waste is very toxic to the environment and contributes to human health issues and even global warming.
Electronic Environmental Fees:
Some areas in North America and Europe have imposed environmental fees
These environmental fees are used for the collection, transportation and recycling of unused and unwanted electronics. It's also used for research into new recycling technologies, and public information and awareness-building programs as well.
To achieve the highest environmental outcome, e-waste items must be manually dismantled into individual materials and components. This is labour intensive and expensive, as difficult waste streams such as glass, mercury, batteries and wood must be forwarded on at a charge for environmentally friendly recycling. The costs involved, are higher than the returns from the materials contained within electronic waste. Therefore to provide this service a fee must be charged to cover the gap between the costs of disassembly and revenue earned from the components and materials of the discarded electronics. Recycling electronics involves processing the materials and recovering metals, glass and plastics that can be recycled into new products. Other disposal methods may be cheaper or free. The electronics will be transported to a consolidation centre where they will be sorted for processing. From there,all material will be transferred to approved processingand recycling facilities. Recyclers will be required to meet quidelines which outlines the requirements for environmentally sound recycling in accordance with appropriate health, safety and export provisions.
These are most likely to result in large volumes of material which can be recycled and toxic materials often contained in electronic waste going to landfill. Disposal routes for e-waste which are cheap or free do not reflect the true cost of recycling this material. If we do not recycle electronics and reduce the pace of electronic disposal, the environment and communities living in future generations will bear the expense of living and cleaning up contaminated land and water. One individual may think that his or her decision to either recycle or to throw out electronic items may not make an environmental impact. Multiply one individual by a few billion people and you can see we have a potential environmental catastophe to deal with. There is certainly an environmental price to pay for our modern lifestyle in North America and many other parts of the world.