more than 136 million tons of coal ash waste materials are being produced to meet the electricity needs of the us each year. however, more than 55% of these wastes are being dumped in the landfills and ash ponds. many studies indicate the presence of a variety of metal oxides such as iron, aluminum and titanium in these wastes. another application envisioned is to make cement-less concrete using these materials to reduce the portland cement consumption which is responsible for 5-8% of total co2 emissions as a greenhouse gas.<\/p>\n
the main objective of this study was to develop a novel flowsheet for extracting valuable metal oxides from coal ash wastes and to develop a suitable process to utilize them as a useful product in the form of a cement-less concrete. we used totally waste materials to produce some useful metals and also cement-less concrete with much less carbon footprint. we not only left nothing behind as waste but also helped the climate and prevented global warming by decreasing carbon dioxide production. <\/p>\n","protected":false},"excerpt":{"rendered":"
more than 136 million tons of coal ash waste materials are being produced to meet the electricity needs of the us each year. however, more than 55% of these wastes are being dumped in the landfills and ash ponds. many studies indicate the presence of a variety of metal oxides such as iron, aluminum and…<\/p>\n","protected":false},"author":9066,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"footnotes":""},"categories":[4905,4907,4916,4894],"tags":[39,767,59,3044,408,3045],"storyfest_categories":[],"class_list":["post-13323","post","type-post","status-publish","format-standard","hentry","category-adaptation","category-business-economics","category-climate","category-efficiency","tag-carbon-emissions","tag-carbon-footprint","tag-coal","tag-flowsheet","tag-global-warming","tag-metal-oxides"],"acf":[],"yoast_head":"\n