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Selective Pb^(2+) removal and electrochemical regeneration of fresh and recycled FeOOH

Nano Research 2023年第7期16卷 9352-9363页

作者： Lei Wang Lexane Deligniere Samantha Husmann Regina Leiner Carsten bahr Shengjie Zhang Chaochao Dun matthew m.montemore markus Gallei jeffrey j.Urban Choonsoo Kim Volker Presser INm—Leibniz Institute for New materials Campus D22Saarbrücken 66123Germany Department of materials Science and Engineering Saarland UniversityCampus D22Saarbrücken 66123Germany Polymer Chemistry Saarland UniversityCampus C42Saarbrücken 66123Germany 4 GEH Wasserchemie GmbH&Co.KGAdolf-Köhne-Straße Osnabrück 49090 Germany Department of Chemical and Biomolecular Engineering Tulane UniversityNew OrleansLA 70118USA The molecular Foundry Lawrence Berkeley National Laboratory BerkeleyBerkeleyCA 94720USA Saarene-Saarland Center for Energy materials and Sustainability Campus C42Saarbrücken 66123Germany Department of Environmental Engineering with Institute of Energy/Environment Convergence Technologies Kongju National University1223-24 Cheonan-daeroCheonan-si 31080Republic of Korea Department of Future Convergence Engineering Kongju National University1223-24 Cheonan-daeroCheonan-si 31080Republic of Korea

Heavy metal pollution is a key environmental *** extracting heavy metals could accomplish water purification and resource recycling *** is a promising approach with a facile process,adaptability for the broad concentration of feed water,and high ***,the adsorption method faces challenges in synthesizing highperformance sorbents and regenerating adsorbents *** is an environmentally friendly sorbent with low-cost production on a large ***,the selectivity behavior and regeneration of FeOOH are seldom ***,we investigated the selectivity of FeOOH in a mixed solution of Co^(2+),Ni^(2+),and Pb^(2+)and proposed to enhance the capacity of FeOOH and regenerate it by using external *** charge,the FeOOH electrode shows a Pb^(2+)uptake capacity of 20 mg/*** applying a voltage of-0.2/+0.8 V,the uptake capacity increases to a maximum of 42 mg/g and the desorption ratio is 70%-80%.In 35 cycles,FeOOH shows a superior selectivity towards Pb^(2+)compared with Co^(2+)and Ni^(2+),with a purity of 97%±3%in the *** high selectivity is attributed to the lower activation energy for Pb^(2+)*** capacity retentions at the 5^(th)and the 35^(th)cycles are ca.80%and ca.50%,respectively,comparable to the chemical regeneration *** industrially exhausted granular ferric hydroxide as the electrode material,the system exhibits a Pb^(2+)uptake capacity of 37.4 mg/g with high *** work demonstrates the feasibility of regenerating FeOOH by charge and provides a new approach for recycling and upcycling FeOOH sorbent.

关键词： FeOOH electrochemical regeneration selective separation heavy metal ions

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泌乳母猪维生素B_2的需要

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国外畜牧学（饲料） 1989年第3期 5-8页

作者： G.R.Frank j.m.bahr R.A.Easter 唐海东伊利诺大学

前言由于大多数植物性饲料缺乏维生素B_2,猪饲粮中一般都必须补充这种维生素。VB_2为正常繁殖机能所必需,如缺乏可导致性成熟的青年母猪卵巢周期性活动停止。妊娠母猪的VB_2不足可引起早产、难产和生后仔猪死亡。Frank等(1984)的试验表... 详细信息

前言由于大多数植物性饲料缺乏维生素B_2,猪饲粮中一般都必须补充这种维生素。VB_2为正常繁殖机能所必需,如缺乏可导致性成熟的青年母猪卵巢周期性活动停止。妊娠母猪的VB_2不足可引起早产、难产和生后仔猪死亡。Frank等(1984)的试验表明,妊娠母猪VB_2的需要量约6.5mg,高于NRC(1979)5.4mg/日的标准。有关泌乳母猪VB_2需要方面的资料较少。

关键词：猪泌乳母猪维生素B2

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Fire and Smoke Phenomenon in West Najaf City —Southwest Iraq

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Engineering（科研） 2019年第12期11卷 791-800页

作者： Abdulkadhim j. Alabidi Saadi A. m. Al-Dahaan Nadhir Al-Ansari Department of Geology Faculty of Science University of Kufa Kufa Iraq Lulea University of Technology Lulea Sweden.

A strange phenomenon of fire taking place at Arruhban area west bahr-Al Najaf area in Iraq was noticed in 2010 and smoke continued many months;this phenomenon reappeared many years later. This site is part of bahr-Al Najaf-Iraq NE Arabian plate, located in flat area near an archeological site of Christian temple called Tel Arruhban. To understand the causes for this fire in a non-residential area, field observations from repeated visits between 2010 and 2018 and on-site excavation operations were conducted. The results of analysis of soil samples, and on-site detection for gases and vapors showed that the phenomenon of burning and smoke generated at this site was due to external influences and that the presence of soil rich with organic materials helped to the existence of this phenomenon.

关键词： Smoke Phenomenon bahr-Al Najaf Tel Arruhban Detected Gases

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The effect of nanosized CoFe2O4 addition on the magnetic properties of GdBa2Cu3O7-δ using AC magnetic susceptibility measurements

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journal of Advanced Ceramics 2016年第1期5卷 93-101页

作者： R.AWAD N.H.mOHAmmED A.I.ABOU ALY S.ISBER H.A.mOTAWEH D.EL-SAID BAKEER m.ROUmI(E) Physics Department Faculty of Science Alexandria University Alexandria EgyptPhysics Department Faculty of Science Beirut Arab University Lebanon Physics Department Faculty of Science Alexandria University Alexandria Egypt Physics Department American University of Beirut Beirut Lebanon Physics Department Faculty of Science Damanhur University Damanhur Egypt Accelerator Laboratory Lebanese Atomic Energy Commission Beirut Lebanon

Superconductor samples of type (CoFe2O4)xGdBa2Cu3O7-δ (0≤x≤0.1) were synthesized by the conventional solid-state reaction technique, whereas nanosized CoFe2O4 was prepared by co-precipitation method with grain size of about 8.5 nm. The elemental content of the prepared samples was determined using particle induced X-ray emission (PIXE). The temperature dependence of real (χ’) and imaginary (χ?) components of AC magnetic susceptibility (ACmS) at different magnetic field amplitude (3-15 Oe) was investigated. The analysis of the temperature dependence of ACmS was performed using Bean critical state model. The values of the critical current density j c at T > T p (T p is the inter-granular loss peak temperature) were calculated as a function of magnetic field and nanosized CoFe2O4 content. It was found that the low nanosized CoFe2O4 addition content (x = 0.01) improves the critical current density j c of Gd-123 superconducting phase. The observed variation of j c with temperature indicated that the weak links are changed from superconductor-normal metal-superconductor (SNS) for free sample to superconductor-insulator-superconductor (SIS) type of junctions for samples added with nanosized CoFe2O4 of x > 0.01. We also discussed the experimental results in the framework of the critical state model to estimate the effective volume fraction of the grains f g using Cole-Cole plots.

关键词： Gd-123 phase nanosized CoFe2O4 AC magnetic susceptibility (ACmS) critical current density particle induced X-ray emission (PIXE)

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