PPT-Acid Deposition

Impact on Ecosystems The study of environmental chemistry involves more than just the detection of substances Scientists who study the environment conduct investigations to determine whether there is evidence of change in the environment. By: Habiba Sallam . What is acid rain?. Acid . rain is a type of acid deposition which can appear in many formations, for example, wet deposition is rain, sleet, snow or fog than has turned acidic. Dry deposition is another kind of acid deposition and it when gases and dust particles become more acidic than usual. Wet and dry deposition can both be carried by the wind. Sometimes for very long distances. And deposition in both forms falls on buildings, cars, and trees and can make water bodies acidic too. Dry deposition can be inhaled by humans and that can cause health issues. . Chris Evans, Jane Hall, Ed Rowe. Why revisit peat? . Country. Peat area (km. 2. ). Russia (European). 213,000 . Finland. 85,000 . Sweden. 66,000 . (PVD and CVD). 1. Plan of presentation. Deposition methods. . CVD(. . Chemical . Vapor . Deposition) . . PVD ( Physical . Vapor . Deposition. ). Principles, processes on . the surface . . 2. The . surface. features of the Earth change as a result of observable physical and chemical processes . Weathering and Erosion. This is a monument . called Cleopatra’s . Needle. It was carved in Egypt around 1450B.C. The sides are carved with hieroglyphs, the writing of ancient Egypt. It stood in the dry, hot Egyptian desert for over 3000 years. During that time, the hieroglyphs remained distinct.. What does it mean to be malleable and ductile?. List 5 acids and 5 bases!. WHAT IS ACID RAIN?. "Acid rain" is a broad term referring to a mixture of wet and dry deposition (deposited material) from the atmosphere containing higher than normal amounts of nitric and sulfuric acids. A. State what is meant by the term acid deposition and outline its origins.. Discuss . the environmental effects of acid deposition and possible methods to counteract them.. . acid deposition. Acid deposition refers to the process by which acidic particles, gases and precipitation leave the atmosphere . Lecture 20. Aqueous Phase Chemistry Part II Wrap-Up /. Acid Deposition. AQUEOUS PHASE CHEMICAL KINETICS. Units for aqueous phase rate (R. a. ): . M/s (moles/L. solution. /s), if multiplied by L (vol/vol) then the rate is converted to moles/L. pH Scale. PRIMARY POLLUTANTS (sulfur dioxide & nitrogen oxides) are emitted by combustion.. Primary pollutants can travel as far as 1,000 km. .. As the primary pollutants react with H. 2. O vapor and O. Acidic Deposition. The deposition of acidic or acid-forming pollutants from the atmosphere onto Earth’s surface. Often takes place as acid rain, but includes acid snow, sleet, hail, fog, or gases. Acid Deposition. Josh . Verseman. Background. Sulfur Dioxide: . chemical compound (SO. 2. ). . Acid Rain. : forms when sulfur dioxide particles combine in the atmosphere, creates sulfuric acid. . Environmental concern. Stretch across much of India, Bangladesh, China, and the western Pacific Ocean. Air pollution connects the world. Pollutants can circle the globe in about two weeks. Stricter air pollution standards and continued shifts towards cleaner fuels are needed. Starter:. What pH’s are acidic?. What colour does universal indicator turn in the presence of acid?. What are acids?. Rain is naturally slightly acidic pH 5.6. Caused by carbon dioxide in the air dissolving into the water forming . (2) Citizen Acid Rain Monitoring Networks (LCC+UVM and Audubon) . Vermont Acid Precipitation Monitoring Program. Utility Acid Precipitation Study Program . EPRI Operational Evaluation Network. Atmospheric Integrated Research Monitoring . Network in East Asia . ): monitoring data assessment . for 2000-2014 period. Based on Reports by . :. Chair of the Scientific Advisory Committee for EANET. Chairperson of Drafting Committee for PRSAD3.