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32. Selective recovery of critical materials in supercritical water desalination

Author

Yoon, Tae Jun, Craddock, Erica P., Lewis, Jeremy C., Matteson, John A., Seong, Jong Geun, Singh, Rajinder P., Maerzke, Katie A., Currier, Robert P., and Findikoglu, Alp T.

Subjects
Physics - Chemical Physics, Physics - Geophysics
Abstract

Supercritical water desalination (SCWD) is an alternative zero-liquid discharge desalination technique that can overcome many technical and environmental challenges in common desalination processes. Our recent techno-economic analyses on the process integration and intensification of an SCWD process suggest that SCWD can be an economically competitive zero-liquid discharge desalination technique for highly concentrated brines. In addition to these attractive features, this work explores the possibility of utilizing the SCWD process for the selective recovery of industrially essential materials as co-products. Model brines containing sodium chloride, neodymium chloride, and other sodium-containing salts, are examined as model feeds from 25 to 450 C at 25 MPa. The sodium contents in the effluent were not sensitive to the presence other salts, but that of neodymium was. When sodium acetate was added, water-insoluble precipitates were obtained. The characterization of these deposits using gas pycnometer, FT-IR, SEM/EDS, and XRD indicates that the precipitates mainly contain neodymium hydroxide and some low-concentration impurities. These results suggest that an SCWD process has the potential to recover critical materials while producing freshwater., Comment: 44 pages, 7 figures, submitted as a journal article

Published
2021

45. CCR2-Mediated Uptake of Constitutively Produced CCL2: A Mechanism for Regulating Chemokine Levels in the Blood.

Author

Zhao, Bin N, Campbell, James J, Salanga, Catherina L, Ertl, Linda S, Wang, Yu, Yau, Simon, Dang, Ton, Zeng, Yibin, McMahon, Jeffrey P, Krasinski, Antoni, Zhang, Penglie, Kufareva, Irina, Handel, Tracy M, Charo, Israel F, Singh, Rajinder, and Schall, Thomas J

Subjects
Underpinning research, 1.1 Normal biological development and functioning, Animals, Biomarkers, Cell Line, Chemokine CCL2, Dose-Response Relationship, Drug, Female, Gene Expression, Humans, Mice, Monocytes, Receptors, CCR2, Immunology
Abstract

C-C chemokine receptor 2 (CCR2) is a key driver of monocyte/macrophage trafficking to sites of inflammation and has long been considered a target for intervention in autoimmune disease. However, systemic administration of CCR2 antagonists is associated with marked increases in CCL2, a CCR2 ligand, in the blood. This heretofore unexplained phenomenon complicates interpretation of in vivo responses to CCR2 antagonism. We report that CCL2 elevation after pharmacological CCR2 blockade is due to interruption in a balance between CCL2 secretion by a variety of cells and its uptake by constitutive internalization and recycling of CCR2. We observed this phenomenon in response to structurally diverse CCR2 antagonists in wild-type mice, and also found substantially higher CCL2 plasma levels in mice lacking the CCR2 gene. Our findings suggest that CCL2 is cleared from blood in a CCR2-dependent but G protein (Gαi, Gαs or Gαq/11)-independent manner. This constitutive internalization is rapid: on a given monocyte, the entire cell surface CCR2 population is turned over in

Published
2019

50. Effectiveness of phototherapy with and without probiotics for the treatment of indirect hyperbilirubinaemia in preterm neonates: a randomised controlled trial

Author

Nassif, Hisham, primary, Alaifan, Meshari, additional, Tamur, Shadi, additional, Khadawardi, Khalid, additional, Bahauddin, Ammar A., additional, Ahmed, Aijaz, additional, Ahmad, Sarfraz, additional, Singh, Rajinder, additional, Alhussaini, Bakr H., additional, and Hassan, Amber, additional

Published
2024
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