Publications by authors named "Shelir Ebrahimi"
Surface waters may contain varying levels of wastewater effluent associated with de facto reuse, which may influence their toxicological properties both prior to and following treatment. This study examined the genotoxic response of three surface waters containing a range of wastewater effluent (5%, 10%, and 25% by volume). The SOS Chromotest™ was used to assay the genotoxicity of both chlorinated and unchlorinated mixtures.
View Article and Find Full Text PDFNitrate contamination is one of the largest issues facing communities worldwide. One of the most common methods for nitrate removal from water is ion exchange using nitrate selective resin. Although these resins have a great capacity for nitrate removal, they are considered non regenerable.
View Article and Find Full Text PDFArticle Synopsis
- The research explores the sustainability of treating nitrate-contaminated water through multi-cycle bioregeneration of ion-exchange resin, focusing on the effects of temperature and salt concentration on the denitrification process.
- The findings show that while the nitrate removal rate increases with temperature, higher salt concentrations negatively impact degradation rates, with significant variances observed at different temperatures.
- This study is the first to analyze the interaction between salt concentration and temperature on biological denitrification, revealing that low temperatures substantially diminish the culture's ability to tolerate high salt levels.
Article Synopsis
- The study explores the effectiveness of regenerating high-capacity single-use ion-exchange resins to remove nitrate from contaminated drinking water, using a biological approach for regeneration.
- After the resin is exhausted, it undergoes a 48-hour regeneration process involving a specialized microbial culture that reduces nitrate, showing that the culture can successfully regenerate the resin for multiple use cycles.
- The findings indicate that the resin can maintain its capacity over several cycles, with only a 6% capacity loss after six cycles, marking a significant advancement in sustainable water treatment methodologies.