The Experts below are selected from a list of 141 Experts worldwide ranked by ideXlab platform
D Venkata K Ramana - One of the best experts on this subject based on the ideXlab platform.
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activated carbon produced from Pigeon Peas hulls waste as a low cost agro waste adsorbent for cu ii and cd ii removal
Desalination and Water Treatment, 2016Co-Authors: D Venkata K Ramana, Kim MinAbstract:AbstractPigeon Peas hulls (PPH) as an agro-waste by-product and activated carbon produced from PPH (APPH) were used as effective and efficient adsorbents for the removal of Cu(II) and Cd(II) from aqueous solutions. The adsorbents were characterized by Fourier transform infrared spectroscopy, scanning electron microscopy, transmission electron microscopy, X-ray diffraction and Brunauer, Emmett and Teller surface area measurements. The influence of various parameters, such as the effect of pH, adsorbent dose, contact time, initial metal ion concentration, and temperature, were evaluated. The experiments showed that the removal of metal ions followed a pseudo-second-order kinetic model and equilibrium adsorption studies confirmed that the Langmuir model provided a better-fit, and showed that APPH has greater potential than PPH. The thermodynamic properties, i.e. (ΔG°), (ΔH°), and (ΔS°), showed that the adsorption of Cu(II) and Cd(II) onto PPH and APPH was endothermic, spontaneous, and feasible over the tempe...
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Pigeon Peas hulls waste as potential adsorbent for removal of pb ii and ni ii from water
Chemical Engineering Journal, 2012Co-Authors: D Venkata K Ramana, Harikishore Kumar D Reddy, K SeshaiahAbstract:Abstract In this study, Pigeon Peas hulls powder, a low-cost agricultural by-product, was used as adsorbent for the removal of Pb(II) and Ni(II) ions from aqueous solutions. The adsorbent was characterized by Fourier transform infrared spectroscopy and scanning electron microscopy. The adsorption characteristics were explored using well-established and effective parameters including the effect of pH, contact time, adsorbent dosage, initial metal ion concentration and temperature. Optimum adsorption of Pb(II) and Ni(II) was observed at pH 4.0. Kinetic studies revealed that the adsorption data fit well to pseudo-second-order model with high correlation coefficient. Langmuir model gives a better fit than the Freundlich and Dubinin–Radushkevich models. Thermodynamic properties, i.e., Δ G o , Δ H o , and Δ S o showed that adsorption of Pb(II) and Ni(II) onto PPH was endothermic, spontaneous and feasible in the temperature range of 293–313 K. The PPH powder can be used as an effective, low cost, and eco-friendly green adsorbent for the removal of selected metal ions from aqueous solution.
K Seshaiah - One of the best experts on this subject based on the ideXlab platform.
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Pigeon Peas hulls waste as potential adsorbent for removal of pb ii and ni ii from water
Chemical Engineering Journal, 2012Co-Authors: D Venkata K Ramana, Harikishore Kumar D Reddy, K SeshaiahAbstract:Abstract In this study, Pigeon Peas hulls powder, a low-cost agricultural by-product, was used as adsorbent for the removal of Pb(II) and Ni(II) ions from aqueous solutions. The adsorbent was characterized by Fourier transform infrared spectroscopy and scanning electron microscopy. The adsorption characteristics were explored using well-established and effective parameters including the effect of pH, contact time, adsorbent dosage, initial metal ion concentration and temperature. Optimum adsorption of Pb(II) and Ni(II) was observed at pH 4.0. Kinetic studies revealed that the adsorption data fit well to pseudo-second-order model with high correlation coefficient. Langmuir model gives a better fit than the Freundlich and Dubinin–Radushkevich models. Thermodynamic properties, i.e., Δ G o , Δ H o , and Δ S o showed that adsorption of Pb(II) and Ni(II) onto PPH was endothermic, spontaneous and feasible in the temperature range of 293–313 K. The PPH powder can be used as an effective, low cost, and eco-friendly green adsorbent for the removal of selected metal ions from aqueous solution.
Maren Hegsted - One of the best experts on this subject based on the ideXlab platform.
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protein quality of weaning baby food from african white fleshed sweetpotato varieties and apios americana with Pigeon Peas added as a complementary protein
Nutrition Research, 1994Co-Authors: M Ameny, P W Wilson, Maren HegstedAbstract:Abstract White sweetpotatoes ( Ipomoea batatas (L.) Lam ) are a major food crop in Africa. The purpose of this project was to evaluate the protein quality of various white fleshed African sweetpotatoes and Apios americana tubers for use as a baby weaning food. Puree was processed from four white fleshed sweetpotato varieties and Apios each mixed with Pigeon Peas ( Cajanus cajan ) added as a complementary protein source. The sweetpotatoes and apios had a protein content ranging from 4.26 to 8.23 percent on dry weight basis. These were formulated into a baby food intended for a one year old baby in 60:40 ratio, with Pigeon Peas (a legume) added to raise the protein content to 10% for Protein Efficiency Ratio (PER) studies. The diets were fed to 6 groups of rats, 10 rats/diet. PER was found to range from 1.57 to 1.92 compared to a PER for casein of 2.5, indicating significant differences (p
A D Hill - One of the best experts on this subject based on the ideXlab platform.
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inositol phosphate content of selected dry beans Peas and lentils raw and cooked
Journal of Food Composition and Analysis, 1996Co-Authors: Eugene R Morris, A D HillAbstract:Abstract Fourteen varieties of dry legumes available in local supermarkets were analyzed for inositol phosphate profile in the raw state and after cooking. Inositol tris-, tetrakis-, pentakis-, and hexakisphosphate (IP 3 –IP 6 ) were determined by a HPLC procedure. The concentration of inositol phosphates in raw dry legumes did not differ significantly among three different brands. Phytic acid (IP 6 ) concentration (per kg dry basis) ranged from 6.0 mmol in chickPeas to 14.2 mmol in black beans. Phytic acid was the predominate inositol phosphate of the total inositol phosphates determined in raw dry legumes, ranging from 77% in chickPeas and Pigeon Peas to 88% in black beans. The remainder of the inositol phosphates in raw, dry legumes were IP 4 and IP 5 , except lentils contained, in addition, a detectable amount of IP 3 . The cooked legumes all contained detectable amounts of IP 3 , increased amounts of both IP 4 and IP 5 , but lower amounts of IP 6 in comparison to the raw dry legume (differences between uncooked and cooked were statistically significant, P 6 in the cooked legumes averaged 83%, ranging from 68% in red kidney beans to 86% in chickPeas, of the concentrations in the raw dry legumes. Phytic acid remained the predominate inositol phosphate in cooked legumes, averaging 68% of the total and ranging from 60% in Pigeon Peas to 78% in yellow split Peas. Quick soak vs overnight soak of beans before cooking resulted in no difference in inositol phosphate concentration or profile of cooked beans. Although the total inositol phosphates did not differ significantly between raw and cooked dry legumes ( P > 0.1), the IP 6 and IP 5 + IP 6 represented a smaller percentage of the total in the cooked legumes, suggesting that cooking decreases the potential adverse impact of inositol phosphates on mineral utilization when legumes are included in the diet.
T.k. Morake - One of the best experts on this subject based on the ideXlab platform.
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The composition of Pigeon Peas (Cajanus cajan (L. Millsp.) grown in Botswana
Plant Foods for Human Nutrition, 2002Co-Authors: J.o. Amarteifio, D.c. Munthali, S.k. Karikari, T.k. MorakeAbstract:This study investigated the composition of Pigeon Peas ( Cajanus cajan ),grown at Sebele, Botswana. The raw seeds of six varieties were analyzed fordry matter, crude fat, protein, fiber, and ash, using Association of OfficialAnalytical Chemists procedures. Major minerals, Ca, K, P, Mg, Na and traceminerals, Cu, Fe and Zn were also assessed. The range of nutrient contentsobtained were: dry matter 86.6–88.0%, crude protein 19.0–21.7%, crudefat 1.2–1.3%, crude fiber 9.8–13.0%, and ash 3.9–4.3%. Minerals ranges(mg/100 g dry matter) were: K 1845–1941, P 163–293, Ca 120–167, Mg 113–127, Na 11.3–12.0, Zn 7.2–8.2, Fe 2.5–4.7 and Cu 1.6–1.8. There wereno significant differences in Na among the six varieties ( p >0.05). For the other components, varietal differences ( p < 0.05) were observed. The valuesobtained for the dry matter, crude protein, fat, ash, Ca, Cu, Fe, and Mg weresimilar to those in Pigeon Peas grown elsewhere, while those for crude fiber and Zn were higher. In general, the composition of Pigeon Peas compared favorably with those of other legumes such as Bambara groundnut ( Vignasubterranea ). The levels of crude protein, crude fiber, K, Ca, P and Mgindicated that Pigeon Peas could be valuable in the diet of the people of Botswana. This crop would positively contribute protein in the diet and thediversification of agricultural produce.