Uranium recovery from seawater: development of fiber adsorbents prepared via atom-transfer radical polymerization

Saito, Tomonori; Brown, Suree; Chatterjee, Sabornie; Kim, Jungseung; Tsouris, Costas; Mayes, Richard T.; Kuo, Lih; Gill, Gary A.; Oyola, Yatsandra; Janke, Christopher J.; Dai, Sheng

doi:10.1039/c4ta03276d

Cited by 156 publications

(111 citation statements)

References 34 publications

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“…1b , marine tests indicate polyamidoxime is much more selective toward vanadium than uranium. Thus, despite recent advances affording improved adsorption capacity, such as ligand grafting variations, systematic tuning of polymer morphology 10 and adsorbent pre-treatment parameters 11 , many questions remain regarding the dominant factors that determine the selective recovery of metal ions from seawater. To this end, we have applied complementary techniques spanning the theoretical and experimental small molecule and bulk material regimes in an effort to understand the vanadium selectivity displayed by polyamidoxime adsorbents.…”

Section: Introductionmentioning

confidence: 99%

Origin of the unusually strong and selective binding of vanadium by polyamidoximes in seawater

et al. 2017

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Amidoxime-functionalized polymeric adsorbents are the current state-of-the-art materials for collecting uranium (U) from seawater. However, marine tests show that vanadium (V) is preferentially extracted over U and many other cations. Herein, we report a complementary and comprehensive investigation integrating ab initio simulations with thermochemical titrations and XAFS spectroscopy to understand the unusually strong and selective binding of V by polyamidoximes. While the open-chain amidoxime functionalities do not bind V, the cyclic imide-dioxime group of the adsorbent forms a peculiar non-oxido V5+ complex, exhibiting the highest stability constant value ever observed for the V5+ species. XAFS analysis of adsorbents following deployment in environmental seawater confirms V binding solely by the imide-dioximes. Our fundamental findings offer not only guidance for future optimization of selectivity in amidoxime-based sorbent materials, but may also afford insight to understanding the extensive accumulation of V in some marine organisms.

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Section: Introductionmentioning

confidence: 99%

Origin of the unusually strong and selective binding of vanadium by polyamidoximes in seawater

et al. 2017

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“…Water vapor at that point condenses on a slanted glass covering surface, in order to permit clean water to flow into a collector. Since the pure water dissipates and the impurities do not, the water is distilled and making it secures to drink [4].…”

Section: Introductionmentioning

confidence: 99%

Development of Solar Desalination System by Using Basin Solar Energy

Hakim¹,

Aisyah²,

Edyazuan³

2019

I. tech. mag.

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Solar desalination is a process of removing salt content in brackish or saline water and converting it into fresh water by the aid of solar energy. The portable solar basin was utilized to undergo this process and the collected desalinated water was to be compared with the Drinking Water Quality Standard in order to identify the safety and cleanliness of the water produced. The main purpose of this study is to improve the solar basin designs which yield the optimum volume of purified water that achieve the quality of drinking water and low cost. The solar basin was designed with the angle tilt of 15° which it able to achieve maximum sun ray exposure. The solar basin that was used is the conventional type single slope with different component inside the solar basin (without stages and rocks; with stages and without rocks; and with both stages and rocks. The source of water be used in this process is seawater (Pengkalan Balak Beach), ground water (Cherana Puteh Hot Spring) and river (small stream of Sungai Siput). The basin solar design with steps and rocks able to produce maximum desalinated water up to 1120 ml per day with average temperature of 59.7 °C, almost 100% reduction of COD, TDS, conductivity, element traces of Ca, Mg, Na and K with BOD level of 1.55 mg/l which mostly comply with the drinking water standard. KEYWORDSBasin solar energy, desalination, solar still.This project required to design and constructing the device system for the process of desalination (solar still) which at the end of the project, the yield and quality of water for three different solar still being compared. The main type of solar still used is a conventional solar still without any i TECH MAG

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“…Seawater is a potential resource, but, at a concentration of 3 ppb, more research is required for its economical recovery. [1] Phosphate rock is a source for the production of fertilizer and also contains uranium at 70-200 ppm; its recovery from wet process phosphoric acid plants would be an important resource and solvent extraction has been used commercially for recovery [2] though not at the present time. [3] In light of the need for uranium recovery, we have undertaken a program to develop a polymer-supported complexant with a high affinity for U(VI) from wet process phosphoric acid.…”

Section: Introductionmentioning

confidence: 99%

Polymer-Supported Aminomethylphosphinate as a Ligand with a High Affinity for U(VI) from Phosphoric Acid Solutions: Combining Variables to Optimize Ligand–Ion Communication

Alexandratos

Zhu

2016

Solvent Extraction and Ion Exchange

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Aminomethylphosphinic acid (AMPA) is immobilized onto cross-linked polystyrene beads and found to have a high affinity for the uranyl ion, especially from solutions as acidic as 6 M H 3 PO 4 . The trend in uranyl affinity by different ligands is AMPA > phosphinic > phosphonic > sulfonic. For example, the percent sorbed from 6 M H 3 PO 4 is 89.5% (AMPA), 44.8% (phosphinic), 5.38% (phosphonic), and 2.60% (sulfonic). The high affinity shown by AMPA is due to the decreased hydrogen bonding in the phosphinic acid ligand as well as synergistic coordination of the uranyl ion by a proximate P=O of a second phosphinate ligand. AMPA contacted with synthetic wet process phosphoric acid solution sorbed 72.2% uranium compared to 0.14% for a commercially available sulfonic acid.

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Uranium recovery from seawater: development of fiber adsorbents prepared via atom-transfer radical polymerization

Abstract: Fiber adsorbents synthesizedviaATRP.

Cited by 156 publications

References 34 publications

Origin of the unusually strong and selective binding of vanadium by polyamidoximes in seawater

Origin of the unusually strong and selective binding of vanadium by polyamidoximes in seawater

Development of Solar Desalination System by Using Basin Solar Energy

Polymer-Supported Aminomethylphosphinate as a Ligand with a High Affinity for U(VI) from Phosphoric Acid Solutions: Combining Variables to Optimize Ligand–Ion Communication

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