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Acidic Surface Functional Groups and Mineral Elements in Lakra Coal (Sindh, Pakistan)

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dc.contributor.author KHALID SATED
dc.contributor.author MUHAMMAD ISHAQ
dc.contributor.author IMTIAZ AHMAD
dc.contributor.author MUHAMMAD SHAKIRULLAH
dc.contributor.author SAJJAD HAIDER
dc.date.accessioned 2023-10-27T04:52:21Z
dc.date.available 2023-10-27T04:52:21Z
dc.date.issued 2010-04-06
dc.identifier.citation Saeed, K., Ishaq, M., Ahjmad, I., Shakirullah, M., & Haider, S. (2010). Acidic surface functional groups and mineral elements in Lakra coal (Sindh, Pakistan). Journal of the Chemical Society of Pakistan, 32. en_US
dc.identifier.issn 0253-5106
dc.identifier.uri http://142.54.178.187:9060/xmlui/handle/123456789/19883
dc.description.abstract Surface acidity of virgin coal (Lakra Sindh, Pakistan) and variously extracted/leached coal samples leached with HNO₃, NaOH, and KMnO₄, were investigated by aqueous potentiometric titration employing KOH as a titrant. The titration curve of virgin coal showed that its surface might contain carboxylic, carbonyl, phenolic and other weak acidic functional groups such as enols and C-H bond. The titration curves of leached coal samples showed inflections at pH 4-11, being not similar the inflections of carboxylic groups. This inflection might be given by functional groups like CO₂, phenolic, enols and C-H. Mineral matter such as Fe, K, Zn, Mn and Ni were determined in the ash of coal by atomic absorption spectrophotometer and was found that Fe (3104 µg/g) in the highest and Ni (36.05 µg/g) in the lowest quantity is present in virgin coal sample. en_US
dc.description.sponsorship The chemical society of Pakistan is an approved society from the PSF. en_US
dc.language.iso en en_US
dc.publisher HEJ Research Institute of Chemistry, University of Karachi, Karachi. en_US
dc.title Acidic Surface Functional Groups and Mineral Elements in Lakra Coal (Sindh, Pakistan) en_US
dc.type Article en_US


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