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 |