Time filter

Source Type

Jamil N.,University of Punjab | Baqar M.,University of Punjab | Manzoor M.,University of Punjab | Abbas N.,Center for Environment Protection Studies | And 6 more authors.
Pakistan Journal of Scientific and Industrial Research Series B: Biological Sciences | Year: 2015

The present study assessed the accumulation of selected heavy metals (Cd, Cr, Pb and Cu) in different organs including brain, heart, lungs, liver, stomach, kidney and flesh (muscles) of several animals commercially available in the market of Lahore, Pakistan. The concentrations found in different organs of chicken, goat and cow ranged between 0.132-2.165 ng/g for Cd, 0.768-2.335 ng/g for Cr, 0.260-1.411 Hg/g for Pb and 0.092-1.195 ng/g for Cu. In the absence of national safety standards in respect to the content of heavy metals in foodstuffs, the results obtained were compared with international guidelines and found concentrations considerably higher than the prescribed safe limits. Therefore, immediate attention must be paid to prevent public health risks associated with the presence of toxic heavy metals in the commercially available meat products.

Tahir L.,Applied Chemistry Research Center | Nazir R.,Applied Chemistry Research Center | Deba F.,Center for Environment Protection Studies | Imran A.,Pakistan Institute of Technology for Mineral and Advanced Engineering Materials | And 2 more authors.
Technical Proceedings of the 2013 NSTI Nanotechnology Conference and Expo, NSTI-Nanotech 2013 | Year: 2013

The use of antibiotics has resulted in resistant microbes that hence need to be tackeled by using safe green and effective treatments. Herbal formulations have reached extensive acceptability as a therapeutic agent for different diseases. Present research is designed to formulate a medicine that incorporate both the natural and traditional way of treating wounds. For this purpose ethanolic extracts of Citrus limoniu, Azadirachta indica and Aloe barbadensis leaves were used as reducing agent for the synthesis of silver and gold nanoparticles, thereby incorporating nanoparticles in the extract. The nanoparticle doped extract, was then checked for its efficacy against Staphylococcus aureus, Pseudomonas aeruginosa,E. coli, and Micrococcus Luteus. Preliminary results suggest that the silver and gold nanoparticles have an inhibitory effect giving another hope for overcoming delayed healing and poor response to treatments of wounds.

Abbas N.,Center for Environment Protection Studies | Deeba F.,Center for Environment Protection Studies | Irfan M.,Center for Environment Protection Studies | Butt M.T.,Center for Environment Protection Studies | And 2 more authors.
Journal of the Chemical Society of Pakistan | Year: 2014

Natural contamination of nitrate, fluoride, arsenic and dissolved salts in ground water sources is the main health menace at present in different parts of Pakistan. The metalloids especially arsenic, fluoride and nitrate pose severe health hazards to human being. The present research work investigated the removal techniques for arsenic, fluoride and nitrate from drinking water by adsorption process. Ion exchange resins, activated carbon and activated alumina were used for removal of selected contaminants. These adsorbents were evaluated by comparing their removal efficiency as well as requisite operator skills. The result of activated alumina was found good as compared to activated carbon, mix bed resins and ion exchange resins (IRA-400) for maximum removal of arsenic, nitrate and fluoride. The removal efficiency of arsenic, fluoride and nitrate were found 96%, 99%, 98% respectively in case of activated alumina. The advantage of adsorption process is easy to use and relatively cheaper as compared to other treatment methodologies.

Aftab T.,Center for Environment Protection Studies | Bashir F.,Center for Environment Protection Studies | Khan R.A.,Center for Environment Protection Studies | Iqbal J.,Center for Environment Protection Studies
Desalination and Water Treatment | Year: 2015

Waste tire-derived char prepared from hazardous waste scrap tires was physicochemically characterized and used for the removal of reactive red textile dye color on fixed bed column. The color removal efficiency was carried out using response surface methodology based on three levels, three factorial Box–Behnken design. The significance of independent variables and their interactions were tested by means of the analysis of variance with 95% confidence limits. High regression coefficient between the variable and response (R2 = 99.9%) showed good evaluation of experimental data by polynomial regression model. The color removal conditions were optimized for flow rate (5–15 mL/min), concentration (0.2–0.4 mg/L) of dye, and pH (2–6). The optimum conditions suggested by the model for the three variables such as flow rate, pH, and initial color concentration were 10 mL/min 2.5 and 0.15 mg/L, respectively, with maximum removal of 97.9%. The experimental value was 98.6%, very close to predicted value in model. © 2015 Balaban Desalination Publications. All rights reserved.

Aftab T.,Center for Environment Protection Studies | Abbas N.,Center for Environment Protection Studies | Irfan M.,Center for Environment Protection Studies | Deeba F.,Center for Environment Protection Studies | And 2 more authors.
Pakistan Journal of Scientific and Industrial Research Series A: Physical Sciences | Year: 2015

The objective of the present study was to investigate the adsorption of benzoic acid (BA), valeric acid (VA), propionic acid (PA) and butyric acid (BUA) from aqueous solutions at different dosing rate on the surface of activated carbon. Different trials were taken in order to determine the interaction between the carbon surface and adsorbent species. The residual concentration of acids was calculated by the titrimetric method. Maximum adsorption capacity was found to be 93.37% at dosing rate of 8.75 g for BUA and minimum adsorption capacity was measured as 41.47% at dosing rate of 0.69 g for VA. Keeping the same contact time and mass of activated carbon (2.8 g), the adsorption capacity increases with increasing dosing rate.

Loading Center for Environment Protection Studies collaborators
Loading Center for Environment Protection Studies collaborators