B P International

It was investigated if a strong anion exchange resin (Spectra/Gel IE 1x8) could be used as an adsorbent to efficiently remove Cr(VI) ions from synthetic wastewater solutions. In batch testing, Cr(VI) ions concentrations ranged from 25 to 300 mg/L. Various parameters influencing Cr(VI) adsorption were examined, including solution pH, Cr(VI) and adsorbent concentrations, and contact time. Cr(VI) was satisfactorily maintained by the resin, according to the findings. Equilibrium was obtained in 30 minutes for starting Cr(VI) concentrations up to 100 mg/L. Both the Langmuir and Freundlich isotherms were used to fit the equilibrium data for Cr(VI) adsorption, however the Langmuir isotherm model was demonstrated to be more accurate. with a 173.8 mg/g maximum adsorption capacity Second order kinetics governed the adsorption process. The resin was regenerated using 4M NaOH as an eluent after three regeneration cycles and retained a Cr(VI) adsorption efficacy of more than 83 percent. Author...

The pollutant fate and transport in a river or stream is governed by some physical and chemical processes, which can be formally interpreted considering an elementary volume of the water body. Some principal expressions of pollutant concentration are formulated, which will be useful for the development of the mathematical models. Evaluating the pollutant concentration in the water volume assists in finding how the contact of pollutant with water controls its final quality. Author(s) Details Atish Sagar Agricultural Engineering at Indian Agricultural Research Institute, New Delhi, India. Pankaj Malkani Agricultural Engineering at Indian Agricultural Research Institute, New Delhi, India. Abhinav Dubey Agricultural Engineering at Indian Agricultural Research Institute, New Delhi, India. Prashant Singh Agricultural Engineering at Indian Agricultural Research Institute, New Delhi, India. Read full article: http://bp.bookpi.org/index.php/bpi/catalog/view/80...

Background: Recent studies have shown that wastewater is contaminated by salmonella sp., pathogenic antibiotics-resisting bacteria. Using wastewater in periurban agriculture in Abidjan is likely to be the source of food-borne diseases such as salmonellosis. However, what we know about these resistant salmonella spp. in wastewater is limited in the country. Aims: This study aims to establish the susceptibility profile of Salmonella spp., isolated from wastewater to antibiotics and to antimetabolite commonly used by medical practitioners. Study Design: Spatio-temporal variation was taken into account. Place and Duration of Study: The study took place from August 2008 to January 2009 at the main campus of the University of Cocody in Abidjan. Methodology: Sampling was done on a weekly basis. Wastewater samples were collected at four different sewers in the campus area. Salmonella sp was isolated by a standard method of laboratory. The resistance of...