02254nas a2200241   4500008004100000022001400041245008500055210006900140260007400209300000900283490000800292520136100300653002501661653003701686653002201723653003001745100002601775700002201801700002601823700002401849700002301873856011601896       2013                        eng d  a0049-697900aDefluoridation of drinking water using pural (R) MG-20 mixed hydroxide adsorbent0 aDefluoridation of drinking water using pural R MG20 mixed hydrox  aVAN GODEWIJCKSTRAAT 30, 3311 GZ DORDRECHT, NETHERLANDSbSPRINGERcSEP  a17270 v2243 a<p>The potential ofmixed alumina-magnesia hydroxide adsorbent (PURAL (R) MG-20) for defluoridation of drinking water using batch and continuous mode of operations has been reported in the present article. Systematic adsorption experiments were carried out to elucidate the effects of different process parameters such as adsorbent dose, initial fluoride concentration, pH of the solution and effect of other ions (usually present in groundwater). These studies were aimed to understand the adsorption behaviour of the PURAL (R) MG-20 adsorbents. Fluoride adsorption by PURAL (R) MG-20 sorbent was found pH dependent. Maximum fluoride removal efficiency was observed in the range of pH 5-7. Langmuir isotherm described the data better than Freundlich and Temkin isotherm models and the adsorption capacity was found to be 5.62 mg g(-1) at initial fluoride concentration of 5.13 mg L-1, pH 7 and contact time 24 h. The kinetic result shows that the fluoride sorption follows pseudo-second-order kinetics. Column breakthrough studies were performed to test the performance of the adsorbent media at continuous mode of operation. Thus, it can be concluded that PURAL (R) MG-20 adsorbent can be used directly for field applications since it shows high fluoride uptake capacity under simulated drinking water conditions and it is also commercially available.</p>10aBreakthrough studies10aDefluoridation of drinking water10aKinetic modelling10aMixed hydroxide adsorbent1 aPatankar, Gaurang, V.1 aTambe, Amruta, S.1 aKulkarni, Bhaskar, D.1 aMalyshew, Alexander1 aKamble, Sanjay, P.  uhttp://library.ncl.res.in/content/defluoridation-drinking-water-using-pural-r-mg-20-mixed-hydroxide-adsorbent-002226nas a2200253   4500008004100000022001400041245012500055210006900180260000800249300001100257490000800268520135000276653001501626653002201641653001301663653002001676653002201696653003501718100002501753700002101778700002601799700002201825856012501847       2021                        eng d  a0255-270100aUltrasound assisted curcumin recovery from Curcuma aromatica: understanding the effect of different operating parameters0 aUltrasound assisted curcumin recovery from Curcuma aromatica und  cDEC  a1086040 v1693 aThe present study deals with intensified extraction of curcumin from Curcuma aromatica by employing ultrasound-assisted extraction (UAE) approach also elucidating comparison with the conventional batch extraction to highlight the intensification benefits based on the usage of ultrasound. Understanding into the effect of operational parameters like type of solvent, extraction temperature, solid to solvent ratio and raw material size distribution as well as the equipment operating conditions as frequency and power on the extraction yield has been developed. Based on the results for extraction yield, the optimum conditions for UAE approach were 40 degrees C as temperature, 1:30 as solid to solvent ratio, 0.09 mm as the mean particle size, 240 W as ultrasonic power, 22 kHz as ultrasonic frequency and ethanol as the most suitable solvent. Under these optimum conditions, the highest extraction yield of 73.18% was achieved in 2 h whereas batch extraction for 14 h resulted in 52.31% yield clearly demonstrating the intensification due to ultrasound. Peleg's model was applied to explain the extraction kinetics of curcumin and the proposed model satisfactorily predicted the rates of extraction of cur cumin. Overall, UAE proved to be a better technique in terms of lesser time, lesser heating requirement and additional extraction yield.10aCavitation10aCurcuma aromatica10acurcumin10aIntensification10aKinetic modelling10aUltrasound assisted extraction1 aShirsath, Sachin, R.1 aSable, Sunil, S.1 aGaikwad, Shashank, G.1 aGogate, Parag, R.  uhttp://library.ncl.res.in/content/ultrasound-assisted-curcumin-recovery-curcuma-aromatica-understanding-effect-different