Moinuddin Ghauri

Emissions of NOx, SO2, and CO from Co-Combustion of Wheat Straw and Coal Under Fast Fluidized Bed Condition

Fuel diversity and reduction in pollutant emissions are driving the increased utilization of CO2 neutral biomass. Effects of operating conditions, such as bed temperature; excess air ratio; and secondary to primary air ratio on emissions of NOx, SO2, and CO for burning different blends of wheat straw and Salt Range coal under fast fluidized bed conditions in a pilot scale test facility, are reported in this study. Emissions of NOx were found to decrease with an increase in wheat straw ratio and secondary to primary air ratio. SO2 and CO emissions were observed to decrease with an increase in excess air ratio and wheat straw ratio.

Lignin and Lignin Based Materials for the Removal of Heavy Metals from Waste Water-An Overview

Abstract Water Pollution through heavy metals is the concerned issue as many industries like tanning, steel production and electroplating are the major contributors. Various toxic Heavy metals are a matter of concern as they have severe environmental and health effects. Most commonly, conventional methods are using to remove these heavy metals like precipitation, ion exchange, which are not economical and have disposal issues. Adsorption of heavy metals by different low-cost adsorbents seems to be the best option in wastewater treatment. Many agricultural by-products proved to be suitable as low-cost adsorbents for removing heavy metals efficiently in a minimum time. Lignin residues that involves both agricultural and wood residues and sometimes separated out from black liquor through precipitation have adsorption capacity and affinity comparable to other natural adsorbents. However, lignin as bio adsorbents have the advantage of less cost and gives efficient adsorption results. This study is a review of the recent literature on the use of natural lignin residues for heavy metals adsorption under different experimental scenarios.