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1

Environmentally friendly extraction of bioactive compounds from Mentha arvensis using deep eutectic solvent as green extraction media

100%
Naseem Z., Zahid M., Hanif M. A., Shahid M.
Polish Journal of Environmental Studies
|
2020
|
tom 29
|
nr 5
2

Removal of actacid orange-RL dye using biocomposites: modeling studies

88%
Noreen S., Bhatti H. N., Zuber M., Zahid M., Asgher M.
Polish Journal of Environmental Studies
|
2017
|
tom 26
|
nr 5
Textile industry wastewater plays an important role in environmental pollution. In the present study, the removal of actacid orange-RL (AO-RL) dye was carried out in batch mode with biocomposites. The optimum pH, biosorbent dose, equilibrium time, initial dye concentration, and temperature for maximum dye adsorption were recorded in the range of 3-6, 0.05 g, 60 min and 125-150 mg/L and 30ºC, respectively. Langmuir and Freundlich biosorption isotherms showed the satisfactorily fitness on equilibrium biosorption data, whereas the pseudo first-order and pseudo second-order both showed the satisfactorily fitness on biosorption kinetic data. The characterization of efficient biosorbents was carried out using FT-IR and SEM techniques, which revealed a significant change in biocomposite as a result of dye adsorption. Based on results, we can conclude that the biocomposite could be an efficient adsorbent for the adsorption of dyes from textile wastewater.
3

Variations in the physicochemical profilevof Khushab coal under various environmental conditions

76%
Amjed N., Bhatti I. A., Arif K., Iqbal M., Nazir A., Zahid M.
Polish Journal of Environmental Studies
|
2018
|
tom 27
|
nr 3
This work illustrates the proximate analysis on three types of coal samples obtained from Khushab mines in Pakistan. Analysis of the coal matrix was carried out to determine volatile matter, ash contents, moisture, fixed carbon contents, calorific values, and sulfur contents as per standards of American Society for Testing and Materials (ASTM). The results of proximate analysis show 30.46% fixed carbon content, 28.08% ash content, 6.96% total moisture content, and 34.5% volatile matter within sample A, whereas 40.56% volatile matter, 8.03% moisture content, 8.32% ash and 30.46% fixed carbon content was found in sample B. Sample C contained 15.44% volatile matter, 9.16% moisture content, 40.64% ash content, and 37.5% fixed carbon content, respectively. Sample B has higher calorific value and sulphur contents in comparison to A and C. These coal samples are of good quality from an industrial prospective, but they need to be desulphurized prior to industrial use for the sake of the environment.
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