{"id":341742,"date":"2025-07-01T14:49:20","date_gmt":"2025-07-01T09:19:20","guid":{"rendered":"https:\/\/forumias.com\/blog\/?p=341742"},"modified":"2025-07-01T14:49:20","modified_gmt":"2025-07-01T09:19:20","slug":"secondary-pollutants","status":"publish","type":"post","link":"https:\/\/forumias.com\/blog\/secondary-pollutants\/","title":{"rendered":"Secondary Pollutants"},"content":{"rendered":"<p><strong>News:<\/strong> CREA study says that secondary pollutants constitute up to third of PM2.5 pollution in the country.<\/p>\n<h2>About Secondary Pollutants<\/h2>\n<figure id=\"attachment_341760\" aria-describedby=\"caption-attachment-341760\" style=\"width: 504px\" class=\"wp-caption aligncenter\"><img data-recalc-dims=\"1\" loading=\"lazy\" decoding=\"async\" class=\" wp-image-341760\" src=\"https:\/\/i0.wp.com\/forumias.com\/blog\/wp-content\/uploads\/2025\/07\/Source-Envira-300x189.png?resize=504%2C318&#038;ssl=1\" alt=\"\" width=\"504\" height=\"318\" srcset=\"https:\/\/i0.wp.com\/forumias.com\/blog\/wp-content\/uploads\/2025\/07\/Source-Envira.png?resize=300%2C189&amp;ssl=1 300w, https:\/\/i0.wp.com\/forumias.com\/blog\/wp-content\/uploads\/2025\/07\/Source-Envira.png?resize=1024%2C647&amp;ssl=1 1024w, https:\/\/i0.wp.com\/forumias.com\/blog\/wp-content\/uploads\/2025\/07\/Source-Envira.png?resize=768%2C485&amp;ssl=1 768w, https:\/\/i0.wp.com\/forumias.com\/blog\/wp-content\/uploads\/2025\/07\/Source-Envira.png?w=1314&amp;ssl=1 1314w\" sizes=\"auto, (max-width: 504px) 100vw, 504px\" \/><figcaption id=\"caption-attachment-341760\" class=\"wp-caption-text\">Source &#8211; Envira<\/figcaption><\/figure>\n<ul>\n<li><strong>Secondary pollutants<\/strong> are air pollutants that are <strong>not emitted directly<\/strong> from a source (such as vehicles or factories) but are <strong>formed in the atmosphere<\/strong> through <strong>chemical reactions<\/strong> involving primary pollutants and other atmospheric components like sunlight, oxygen, and water vapor.<\/li>\n<li>Their formation often makes them <strong>harder to control<\/strong>, as they can arise from various combinations of precursors and environmental conditions.<\/li>\n<li><strong>Examples of secondary pollutants<\/strong>\n<ul>\n<li>Tropospheric Ozone (O\u2083)<\/li>\n<li>Sulfuric acid and Nitric acid (component of acid rain)<\/li>\n<li>Peroxyacetyl Nitrate (PAN)<\/li>\n<li>Particulate Matter (PM)<\/li>\n<li>Photochemical Smog<\/li>\n<\/ul>\n<\/li>\n<li>As per a study from the <strong>Centre for Research on Energy and Clean Air (CREA),<\/strong> Secondary pollutants, particularly <strong>ammonium sulphate<\/strong>, are responsible for nearly <strong>one-third of India\u2019s fine particulate matter (PM2.5) pollution.<\/strong>\n<ul>\n<li><strong>Ammonium sulphate<\/strong> results from the reaction between sulphur dioxide (SO2) and ammonia (NH3) in the atmosphere,<\/li>\n<\/ul>\n<\/li>\n<li>The <strong>main driver<\/strong> of ammonium sulphate formation and more than 60% of SO2 emissions in India originate from <strong>coal-fired thermal power plants.<\/strong><\/li>\n<li>This makes them a critical <strong>target for reducing secondary PM2.5 pollution<\/strong> through the implementation of <strong><a href=\"https:\/\/forumias.com\/blog\/flue-gas-desulphurisation-fgd\/\">flue gas desulphurisation (FGD) systems<\/a><\/strong>.<\/li>\n<\/ul>\n","protected":false},"excerpt":{"rendered":"<p>News: CREA study says that secondary pollutants constitute up to third of PM2.5 pollution in the country. About Secondary Pollutants Secondary pollutants are air pollutants that are not emitted directly from a source (such as vehicles or factories) but are formed in the atmosphere through chemical reactions involving primary pollutants and other atmospheric components like&hellip; <a class=\"more-link\" href=\"https:\/\/forumias.com\/blog\/secondary-pollutants\/\">Continue reading <span class=\"screen-reader-text\">Secondary Pollutants<\/span><\/a><\/p>\n","protected":false},"author":10393,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"jetpack_post_was_ever_published":false,"footnotes":""},"categories":[1566,4182,12039],"tags":[11872],"class_list":["post-341742","post","type-post","status-publish","format-standard","hentry","category-daily-factly-articles","category-environment","category-knolls","tag-9pm-daily-factly","entry"],"jetpack_featured_media_url":"","views":"","jetpack_sharing_enabled":true,"_links":{"self":[{"href":"https:\/\/forumias.com\/blog\/wp-json\/wp\/v2\/posts\/341742","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/forumias.com\/blog\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/forumias.com\/blog\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/forumias.com\/blog\/wp-json\/wp\/v2\/users\/10393"}],"replies":[{"embeddable":true,"href":"https:\/\/forumias.com\/blog\/wp-json\/wp\/v2\/comments?post=341742"}],"version-history":[{"count":0,"href":"https:\/\/forumias.com\/blog\/wp-json\/wp\/v2\/posts\/341742\/revisions"}],"wp:attachment":[{"href":"https:\/\/forumias.com\/blog\/wp-json\/wp\/v2\/media?parent=341742"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/forumias.com\/blog\/wp-json\/wp\/v2\/categories?post=341742"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/forumias.com\/blog\/wp-json\/wp\/v2\/tags?post=341742"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}