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Study of Acid Deposition in the Western Region of Thailand

Name: â¡ÇÔ· ÊØÇÃó˧Éì

Organization : ÁËÒÇÔ·ÂÒÅÑÂà·¤â¹âÅÂÕ¾ÃШÍÁà¡ÅéÒ¸¹ºØÃÕ

Name: Kowit Suwannahong

keyword: Acid deposition

; NakhonPathom

; Dry deposition

; Wet deposition

Abstract: The objective of this research was to monitor the acid deposition in the western region of Thailand.The province of Nakhonpathom was chosen as a monitoring site. The acid depositions were dividedinto 2 categories, namely wet and dry depositions which collected by using the wet only collectorand the filter packs, respectively. The sampling period was from January 2001 to February2002.The rainwater samples were analyzed for pH, conductivity, sulfate, nitrate, chloride, calcium,magnesium, sodium, potassium, and ammonium. The results of wet deposition reveal that the pHmean value was 6.35 and the conductivity mean value was 16.47 microsemens per centimeter.When considering the average concentrations of both anions and cations contained in rainwater,ammonium gave the highest amount of 86.78 microequivalent per liter. In addition, ammonium wasalso found at the highest deposition amount of 5.17 milligrams per square meter per year. Theexperiment also reveales that the mole ratio of nitrate to non sea salt sulphate was 1.90 ,indicatingthat the acidity of rain water caused by nitric acid rather than sulfuric acid.In the case of drydeposition, the aerosol sulfate was found at the highest concentration of 1,854 nanograms percubicmeter. The gas concentrations in the atmosphere ranking from high to low were ammonia,hydrogen chloride, sulfurdioxide and nitric acid, respectively. The study on the ratio of wet to dryacid depositions shows that the quantity of the dry acid deposition was about equal to the amount ofthe wet acid deposition.The percentage of the dry acid deposition was 57.71% for sulfur and58.77% for nitrogen.

ÁËÒÇÔ·ÂÒÅÑÂà·¤â¹âÅÂÕ¾ÃШÍÁà¡ÅéÒ¸¹ºØÃÕ

Address: ¡Ãا෾ÁËÒ¹¤Ã

Email: info.lib@mail.kmutt.ac.th

Name: ÊÃéÍ´ÒÇ ÇÔ¹Ô¨¹Ñ¹·Ãѵ¹ì

Role: ÍÒ¨ÒÃÂì·Õè»ÃÖ¡ÉÒ

Created: 2545

Issued: 2005-10-03

Modified: 2558-12-17

ÇÔ·ÂÒ¹Ô¾¹¸ì/Thesis

ISBN: 9749551087

CallNumber: EV314

tha

DegreeName: ÇÔ·ÂÒÈÒʵÃÁËҺѳ±Ôµ

Level: »ÃÔ­­Òâ·

Descipline: à·¤â¹âÅÂÕÊÔè§áÇ´ÅéÍÁ

Grantor: ÁËÒÇÔ·ÂÒÅÑÂà·¤â¹âÅÂÕ¾ÃШÍÁà¡ÅéÒ¸¹ºØÃÕ

©copyrights ÁËÒÇÔ·ÂÒÅÑÂà·¤â¹âÅÂÕ¾ÃШÍÁà¡ÅéÒ¸¹ºØÃÕ

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