Retention profile and subsequent chemical speciation of chromium (III) and (VI)) in industrial wastewater samples employing some onium cations loaded polyurethane foams

Synthesis of Polyfunctional Organic Systems Containing 1-Acyl/Aroyl-anilido-butadienes and their uses as Photochemical Probes and Chelating Agents for Removal of Bismuth (III) from Industrial Wastewater

“…Recent literature survey has indicated that, no work on the Knoevenagel condensate bketoanilide and its metal chelates. Therefore, in continuation to our previous work (Bashammakh et al, 2009;Abou-Mesalam et al, 2003;El-Shahawi et al, 2008;Farag et al, 2007;Zaki et al1995), the present study is focused on the synthesis and characterization of a series of some bdiketone derivatives bearing anilido moieties and their unsaturated bdiketone derivatives. In view of their properties, some of the compounds were tested as antimicrobial and photochemical agents.…”

Advances in preconcentration/removal of environmentally relevant heavy metal ions from water and wastewater by sorbents based on polyurethane foam

“…In addition, the components are retained on PUFs due to both absorption and adsorption, which results in the uniform distribution of sorbates in the whole volume of the sorbent. Thus, a dual mode of sorption mechanism involving absorption related to "solvent extraction" or "weak base anion ion exchange" and an added component for "surface adsorption" has been proposed (Farag et al 2007, El-Shahawi et al 2008, 2011a,b,c, Bashammakh 2010). …”

“…From our literature survey, it is evident that the cellular structure of the PUF sorbents offer unique advantages over conventional sorbents, low-cost sorbents and nanosorbents in rapid, versatile effective separation and/or preconcentration of heavy metal ions from aqueous solutions, as presented in Table 7. For a better argumentation, Figure 3 is shown based on data from literature studies and our previous studies: PUF (Tofan et al 1996, Reddy and Reddy 2003, Alhakawati and Banks 2004, Moawed 2004a,b, Saeed et al 2007, El-Shahawi et al 2008, Abdel Salam et al 2011, chelating resins (Bîlbă et al 1998a,b, Asouhidou et al 2004, Pandey and Thakkar 2004, Ngeontae et al 2007, Rengaraj et al 2007, Shah et al 2011), hemp (Tofan et al 2001, 2009a,b, 2010, Paduraru and Tofan 2008, pine bark (Acemioglu et al 2004, Mohan et al 2007, Vijayakumaran et al 2009, Amalinei et al 2012, Gonçalves et al 2012, fly ash (Gupta et al 2003, 2009a,b, 2011, Özkök et al 2013), zeolites (O'Connell et al 2008), cellulose powder (O'Connell et al 2008, Wan Ngah and Hanafiah 2008. It can be observed from Figure 3 that sorbents based on PUF are competitive against conventional sorbents and low-cost sorbents, being very suitable for the removal and recovery of heavy metal ions from large volumes of industrial wastes.…”

Synthesis and application of alizarin complexone functionalized polyurethane foam: Preconcentration/separation of metal ions from tap water and human urine

“…The sorbed metal ion concentration q t (mol g −1 ) at time t was plotted against the square root of time to test the applicability of the Weber-Morris equation [33].…”