ENV 101 sec-6

Ferdous Ahmed id:1430300 Md. Nuruddin Zahid id:1430497

Jahidul Islam Shamon id:1430349 Md. Jahidul Alam id:1430311

Ikram Hossain id:1421091

Water Pollution.It is the contamination

of water bodies (e.g. lakes, rivers, oceans, aquifers and

groundwater). Water pollution occurs when

pollutants are directly or indirectly discharged

into water bodies without adequate treatment to remove

harmful compounds.

INTRODUCTION

Types Of Water Pollution1.Biological • Infectious Disease ( Pathogens )• Oxygen-Demading Waste

2. Chemical • Nutrients ( Fertilizers )• Toxic Inorganic Materials• Persistent Organic Pollutants (POPs)

3. Physical • Sediments• Thermal Pollution• Solid waste

Causes of Water Pollution1. Industrial waste: Industries produce huge

amount of waste which contains toxic chemicals and pollutants which can causes water pollution as well as air pollution to our environment. They contain pollutants such as lead, mercury, sulphur, asbestos, nitrates and many other harmful chemicals.

2. Sewage and waste water: The sewage and waste water

that is produced by each household is chemically treated and released in to sea with fresh water. The sewage water carries harmful bacteria and chemicals that can cause serious health problems. Pathogens are known as a common water pollutant.

3. Marine Oil Spilling: Oil spill pose a huge concern

as large amount of oil enters into the sea and does not dissolve with water; there by opens problem for local marine wildlife such as fish, birds and sea otters. For e.g.: a ship carrying large quantity of oil may spill oil if met with an accident and can cause varying damage to species in the ocean depending on the quantity of oil spill, size of ocean, toxicity of pollutant.

4. Radioactive Waste: Nuclear energy is produced using

nuclear fission or fusion. The element that is used in production of nuclear energy is Uranium which is highly toxic chemical. The nuclear waste that is produced by radioactive material needs to be disposed off to prevent any nuclear accident. Nuclear waste can have serious environmental hazards if not disposed off properly. Few major accidents have already taken place in Russia and Japan.

5. Chemical fertilizers and pesticides: Chemical fertilizers and pesticides are

used by farmers to protect crops from insects and bacterias. They are useful for the plants growth. However, when these chemicals are mixed up with water produce harmful for plants and animals. Also, when it rains, the chemicals mixes up with rainwater and flow down into rivers and canals which pose serious damages for aquatic animals.

and ets..

Effects Of Water Pollution• Ecosystems are destroyed by the rising

temperature in the water, as coral reefs are affected by the bleaching effect due to warmer temperatures. Additionally,

the warm water forces indigenous water species to seek cooler water in

other areas, causing an ecological damaging shift of the affected area.

• Oil spills in the water causes animal to die when they ingest it or encounter it.

Oil does not dissolve in water so it causes suffocation in fish and birds.

• Swimming in and drinking contaminated water causes skin rashes and health problems like cancer, reproductive problems, typhoid fever and stomach sickness in humans. Which is why it’s very important to make sure that your water is clean and safe to drink.

• Human-produced litter of items such as plastic bags and 6-pack rings can get aquatic animals caught and killed from suffocation.

• Industrial chemicals and agricultural pesticides that end up in aquatic environments can accumulate in fish that are later eaten by humans. Fish are easily poisoned with metals that are also later consumed by humans. Mercury is particularly poisonous to small children and women. Mercury has been found to interfere with the development of the nervous system in fetuses and young children.

Water Pollution Control Water pollution prevention and control measures are critical

to improving water quality and reducing the need for costly wastewater and drinking water treatment. Because water pollution can come from many different sources, a variety of pollution prevention and control measures are needed.The preferred approach for the protection of groundwater resources is pollution prevention. Although drinking water standards generally apply to the use of groundwater supplies, the raw water supplies require protection from contamination. Governmental entities such as ministries of health, natural resources agencies, and environmental protection agencies are generally responsible for such activities. Groundwater pollution control efforts are largely directed at protection of water bodies.

Conclusion Water pollution is bad and it’s not good for people to drink

the water that’s polluted and for all organisms that need water to survive. There are millions of people that don’t have good clean access to water and that they even have to drink the bad polluted water for them it survive, Sewage can cause water pollution along with the toxic chemicals from Industrial business. There are a bunch of water pollutions like toxic and organic and thermal water. And solutions to stop the water pollution are to clean up the garbage and keep your yard clean. To try to stop the water pollution clean up your yard and make sure there is no garbage left anywhere around in the area you live like the streets and neighborhood.