SOUTHEAST UNIVERSITYSCHOOL OF SCIENCE AND ENGINEERING DEPARTMENT OF TEXTILE ENGINEERING

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PRESENTATION ONUsage of Nitric AcidPollution Caused by Nitric Acid & Prevention of the Pollution Caused by Nitric Acid

ASSIGNORDr. Mehbuba Rukni YeamineAssistant ProfessorDepartment of Textile EngineeringSchool of Science & EngineeringSoutheast University

ASSIGNEE Name ID NoMaruf Muntasir 2011100400074Mamun Sharif 2011100400075Mohammad Mohiuddin Chowdhury 2011100400078Nazneen Jahan Tanni 2011100400079Izazul Haque 2011100400081Sazid Khan 2011100400082

OBJECTIVES

Objective of this report is to analyze the usage of nitric acid. This is also to analyze the pollution caused by Nitric Acid and to inform how to prevent it.

We tried to build up some solutions of the problems due to Nitric Acid so that we can make this world more beautiful and comfortable to survive.

Nitric Acid: Nitric acid ( HNO3) known as aqua forties and spirit of nitre, is a highly corrosive and toxic strong acid. 2 H2O + 4 NO2 + O2 4 HNO3 If the solution contains more than 86% nitric acid, it is referred to as Fuming Nitric Acid. 1INTRODUCTION

CONTINUE Properties of Nitric Acid: Colorless when pure Strong acid Poisonous liquid Miscible with water in all proportion Freezing point is -42 degree centigradeBoiling point is 83 degree centigrade 2

3USAGE Nirtic acid is used in many industries , research laboratories. Its used after processing and without processing. Nitric acid is mainly used in the production of fertilizers. This is massively used in food and medical industries. It is also used as AQUA REGAI in purification of gold and chemical synthesis.

Figure: Aqua Regai

4CONTINUE

Massive Usage of Nitric Acid:Rocket Fuel: Red fuming nitric acid, white fuming nitric acid are used in rocket fuel.Chemical Reagent: This acid is used in determination of metal and the grade of metal. Nitric acid is also used in the purification of gold.Wood Working: Nitric acid is often used to artificially age pine and maple. Nitric Acid is also used with other chemical in cleaning food and in dairy equipment primarily to remove precipitated calcium and magnesium.

POLLUTION

Nitric acid is mainly found as liquid form. The waste product of nitric acid is Oxides of Nitrogen which is found as gas. Nitric acid plants produce nitrous oxide (NOx) which is 310 times more harmful than carbon dioxide. Nitric acid pollutes the nature in two ways

Air PollutionWater Pollution 5

6CONTINUE

Air Pollution: Nitric acid pollutes air by constituting acid rain formation. Acidic gases (Nitrogen Oxide and Sulphure Dioxide) are blown by the wind after they are given off to the atmosphere from vehicles, power stations, industries. Then these gases dissolve in rain water to form acid rain. All these happen by the emission of nitrogen dioxide from nitric acid.

7 CONTINUE

Figure: Acid Rain

8CONTINUE; Water Pollution: Nitric Acid plants discharge the waste product of nitric acid into water body which makes the water undrinkable and dirty.

Figure: Polluted Water Figure: Clean Water

9PREVENTION

Consciousness is now highly essential to prevent the pollution caused by nitric acid. Thereafter following steps are helpful for preventing the pollution :

Installation of pollution control equipments in industries and nitric acid plants. Refining the waste product of nitric acid before discharging into water body. Using compressed natural gas in vehicle to reduce the smoke discharged from vehicle. Tree plantation

10CONCLUSION People, States, Local agencies should follow the pollution control system. People should be conscious and more aware.

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RECOMMENDATION Tree plantationStop deforestation

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