Full Terms & Conditions of access and use can be found at http://www.tandfonline.com/action/journalInformation?journalCode=ueso20 Download by: [University of Warwick] Date: 21 April 2017, At: 08:32 Energy Sources, Part A: Recovery, Utilization, and Environmental Effects ISSN: 1556-7036 (Print) 1556-7230 (Online) Journal homepage: http://www.tandfonline.com/loi/ueso20 Extraction and characterization of humic acid from Pakistani lignite coals Mona Zara, Zeeshan Ahmad, Javaid Akhtar, Khurram Shahzad, Naseer Sheikh & Shahid Munir To cite this article: Mona Zara, Zeeshan Ahmad, Javaid Akhtar, Khurram Shahzad, Naseer Sheikh & Shahid Munir (2017): Extraction and characterization of humic acid from Pakistani lignite coals, Energy Sources, Part A: Recovery, Utilization, and Environmental Effects, DOI: 10.1080/15567036.2017.1307886 To link to this article: http://dx.doi.org/10.1080/15567036.2017.1307886 Published online: 20 Apr 2017. Submit your article to this journal View related articles View Crossmark data