Environmental Science Part 2:Water Resources and Treatment Topic 2:Water pollution Hongtao WANG Ph.D.,Associate Professor hongtao@tongji.edu.cn College of Environmental Science and Engineering UNEP-Tongji Institute of Environment for Sustainable Development,Tongji University
Hongtao WANG Ph.D., Associate Professor hongtao@tongji.edu.cn College of Environmental Science and Engineering UNEP-Tongji Institute of Environment for Sustainable Development, Tongji University Environmental Science Part 2: Water Resources and Treatment Topic 2: Water pollution
Water pollution Sources of water pollution 1.Definition:Water pollution is any chemical,biological, or physical change in water quality that has harmful effects on living organisms or that makes water unsuitable for desired uses. 2.Types,effects,and sources of water pollution (see Table 1) 3. Self-Purification processes in rivers (Figure 1) 4.Point and non-point sources of water pollution.(Figure 2) s.Eutrophication in Lake from point and non-point sources(Figure 3) 6.Groundwater contamination(Figure 4
Water pollution Sources of water pollution 1. Definition: Water pollution is any chemical, biological, or physical change in water quality that has harmful effects on living organisms or that makes water unsuitable for desired uses. 2. Types, effects, and sources of water pollution (see Table 1) 3. Self-Purification processes in rivers (Figure 1) 4. Point and non-point sources of water pollution. (Figure 2) 5. Eutrophication in Lake from point and non-point sources (Figure 3) 6. Groundwater contamination (Figure 4 )
Table 1 Types,sources and effects of water pollution Major categories Examples Major human Harmful effects of water sources pollutants and sources Infectious agents Bacteria,viruses, Wastes from Diseases protozoa,and human and parasitic worms animals Oxygen demand Animal manure, Sewage,paper Depleting wastes plant debris,etc. mill, dissolved animal feedlots oxygen(DO)in water Inorganic Heavy metallic Surface runoff, Make fresh water chemicals ions(Pb,As),F industrial effluent unusable, .Cl,etc. diseases Organic Pesticides, Surface runoff, Make fresh water chemicals detergents,oil, industrial effluent unusable, carcinogens,etc. diseases
Major categories of water pollutants and sources Examples Major human sources Harmful effects Infectious agents Bacteria, viruses, protozoa, and parasitic worms Wastes from human and animals Diseases Oxygen demand wastes Animal manure, plant debris, etc. Sewage, paper mill, animal feedlots Depleting dissolved oxygen(DO) in water Inorganic chemicals Heavy metallic ions (Pb, As), F- ,Cl- , etc. Surface runoff, industrial effluent Make fresh water unusable, diseases Organic chemicals Pesticides, detergents, oil, carcinogens, etc. Surface runoff, industrial effluent Make fresh water unusable, diseases Table 1 Types, sources and effects of water pollution
Table 1 Types,sources and effects of water pollution Major categories Examples Major human Harmful effects of water pollutants sources and sources Plant nutrients NO3,PO3-,NH4", Sewage,manure, Excessive growth etc. Runoff from ind.& of blue,green ag. algae,etc. Sediments Soil,silt Soil erosion in Turbidity,disrupt lands aquatic food webs Radioactive Radioactive Nuclear and coal- Genetic mutation, materials isotopes burning power cancers of iodine,radon plants Heat Increasing water Cooling water from Lower DO level in (thermal pollution temperature thermal power waters,abrupt plants aquaculture growth
Major categories of water pollutants and sources Examples Major human sources Harmful effects Plant nutrients NO3 - , PO4 3- , NH4 +, etc. Sewage, manure, Runoff from ind.& ag. Excessive growth of blue, green algae, etc. Sediments Soil, silt Soil erosion in lands Turbidity, disrupt aquatic food webs Radioactive materials Radioactive isotopes of iodine, radon Nuclear and coalburning power plants Genetic mutation, cancers Heat (thermal pollution ) Increasing water temperature Cooling water from thermal power plants Lower DO level in waters, abrupt aquaculture growth Table 1 Types, sources and effects of water pollution
e Figure 19-4 Point and non-NONPOINT SOURCES point sources of water pollution lt is much easier to identify and con- trol point sources than more dispersed non- point sources Hural homes Jrban streets Cropland POINT development SOURCES Factory Wastewater treatment plant Figure 1 Point and Non-point Sources of Water Pollution(1)
Figure 1 Point and Non-point Sources of Water Pollution(1)