Effect of water pollution, Biology

(i) Effect of Human Health:

(a) Mercury compounds in waste water in converted into methyl mercury by

Bacterial action which causes numbness of limbs, lips and tongue, deafness blurring of vision and mental derangement.

1. Mina Mata disease (Crippling deformity) of Japan detected in 1952 due to Consumption fish contaminated with mercury.

2. Consumption of cadmium contaminated water lead to itai itai disease and also known as ouch-ouch disease (a painful disease of bones and joints) and cancer of lungs and lever.

3. Compounds of lead cause anemia, headache, loss of muscle power and bluish line around the gum.

 

(ii) Effect of aquatic life:

(a)  Biocides, polychlorinated biphenyls (PCBS) and other heavy metals such as Hg, Pb, Cd, Cu, as etc directly eliminate certain species of animals.

(b)  An organic and inorganic waste in water decreases the dissolved oxygen (D.O.) content of water.

(c)  Inorganic nutrients like phosphorus, Nitrogen form animals, plants and fertilizers causes eutrophication of lakes.

 

(iii) Biological magnification:

The phenomenon through which certain pollutants get accumulated in to the tissues in increasing or at ration along the food chain is called biological magnification.

E.g. Accumulation of DDT and other pesticides, radio nuclides in the tissues of aquatic animals.

 

(iv) Eutrophication:

Addition of waste water containing phosphorus and nitrogen compound and decomposition of grams wastes in water bodies increases the nutrient content in water which causes excessive growth of gae especially blue green.

 

(v) Hazards of ground water pollution:

Due to seepage from industrial wastes and agricultural run off, ground water get contaminated.

(1)   Presence of excess nitrate in drinking water is dangerous for human health because it reacts with hemoglobin to form non-functional met hemoglobin, and impairs oxygen transport. It is called blue baby syndrome.

(2)   Excess fluoride in drinking water causes teeth deformity, hardening of bones and stiff and painful joints (skeletal Fluor sis).

(3)   Over exploitation of ground water may lead to leaching of arsenic from soil and rock sources which will contaminate ground water.

 

(vi) Effect of land and soil pollution:

(1) Industries manufacturing paper, textile, steel, fertilizers etc. release many organic and inorganic pollutants in the soil. 

Posted Date: 7/11/2012 3:56:27 AM | Location : United States







Related Discussions:- Effect of water pollution, Assignment Help, Ask Question on Effect of water pollution, Get Answer, Expert's Help, Effect of water pollution Discussions

Write discussion on Effect of water pollution
Your posts are moderated
Related Questions
Which one of the following statements about human sperm is correct? 1. Acrosome has a conical pointed structure used for piercing and penetrating the egg, resulting in fertilis

Using the words 'cilia' and 'mucus', describe, very briefly, how the body gets rid of dust which enters the lungs. The lining of the air passages makes mucus which traps dust p

Define Criteria for Assessment of Vitamin D Status? You may recall the events involved in calcium homeostasis described earlier in this section. We studied that sufficient 25-O

Q. How respiratory pigments act? Respiratory pigments are oxygen-carrying molecules present in the blood. When the oxygen concentration is high for instance, in the pulmonary a

Describe the process of biosynthetic phase of photosynthesis occurring in the chloroplast. Explain the process of development of root nodules in a leguminous plant. Name the ox

why vegetative reproduction use in marchantia

What are special properties of transparency factors in corneal hydration of cornea? The factors affecting the transparency include special properties of the corneal epitheliu

Influence of LV Function :  LV functions, whether normal or impaired is important while selecting a patient for CABG and for long-term results of surgical revascularisation. If le

How could knowledge of a pest organism's tolerance limits be used in pest control? Pesticides could be developed that make those limits narrower, environmental conditions could

what is wrong with pasteurs conclusion