{"title":"Treatment of Crude Phosphoric Acid Using Activated Carbon-Based Nanocomposites Integrated with Catalytic Wet Peroxide Oxidation","authors":"M. N. Kouraim","doi":"10.1134/S1066362224040064","DOIUrl":null,"url":null,"abstract":"<p>Activated carbon (AC) decorated by silver (Ag/AC) and silica (Ag-Si/AC) nanoparticles was used in the treatment of crude phosphoric acid to remove some inorganic and organic impurities. The effect of time, solid/liquid ratio, temperature, and hydrogen peroxide dose on the phosphoric acid treatment was examined. The catalytic activity and uranium uptake efficiency are improved when carbon structures contain Ag and Si nanoparticles. Uranium and organic matter are removed from crude phosphoric acid more efficiently when crude phosphoric acid is treated with activated carbon decorated by silver (Ag/AC) and silica (Ag-Si/AC) nanoparticles with catalytic wet peroxide oxidation, compared to the treatment with activated carbon only, and at high acid concentration (8 M) and solid/liquid mass ratios (0.001), using unsurpassed H<sub>2</sub>O<sub>2</sub>. The higher removal efficiencies of uranium and organic matter (OM) were attributed to the increased adsorptive interactions between the AC-based adsorbent surfaces and the OM and uranium species.</p>","PeriodicalId":747,"journal":{"name":"Radiochemistry","volume":"66 4","pages":"444 - 453"},"PeriodicalIF":0.9000,"publicationDate":"2024-10-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"Radiochemistry","FirstCategoryId":"1085","ListUrlMain":"https://link.springer.com/article/10.1134/S1066362224040064","RegionNum":0,"RegionCategory":null,"ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q4","JCRName":"CHEMISTRY, INORGANIC & NUCLEAR","Score":null,"Total":0}
引用次数: 0
Abstract
Activated carbon (AC) decorated by silver (Ag/AC) and silica (Ag-Si/AC) nanoparticles was used in the treatment of crude phosphoric acid to remove some inorganic and organic impurities. The effect of time, solid/liquid ratio, temperature, and hydrogen peroxide dose on the phosphoric acid treatment was examined. The catalytic activity and uranium uptake efficiency are improved when carbon structures contain Ag and Si nanoparticles. Uranium and organic matter are removed from crude phosphoric acid more efficiently when crude phosphoric acid is treated with activated carbon decorated by silver (Ag/AC) and silica (Ag-Si/AC) nanoparticles with catalytic wet peroxide oxidation, compared to the treatment with activated carbon only, and at high acid concentration (8 M) and solid/liquid mass ratios (0.001), using unsurpassed H2O2. The higher removal efficiencies of uranium and organic matter (OM) were attributed to the increased adsorptive interactions between the AC-based adsorbent surfaces and the OM and uranium species.
银（Ag/AC）和二氧化硅（Ag-Si/AC）纳米颗粒装饰的活性炭（AC）被用于处理粗磷酸，以去除一些无机和有机杂质。研究了时间、固液比、温度和过氧化氢剂量对磷酸处理的影响。当碳结构中含有 Ag 和 Si 纳米颗粒时，催化活性和铀吸收效率都会提高。在高酸浓度（8 M）和固/液质量比（0.001）的条件下，与仅使用活性炭处理相比，使用银（Ag/AC）和硅（Ag-Si/AC）纳米颗粒装饰的活性炭处理粗磷酸，并使用无与伦比的过氧化氢进行催化湿氧化，能更有效地去除粗磷酸中的铀和有机物。铀和有机物（OM）的去除率较高的原因是基于 AC 的吸附剂表面与 OM 和铀物种之间的吸附相互作用增强了。
期刊介绍：
Radiochemistry is a journal that covers the theoretical and applied aspects of radiochemistry, including basic nuclear physical properties of radionuclides; chemistry of radioactive elements and their compounds; the occurrence and behavior of natural and artificial radionuclides in the environment; nuclear fuel cycle; radiochemical analysis methods and devices; production and isolation of radionuclides, synthesis of labeled compounds, new applications of radioactive tracers; radiochemical aspects of nuclear medicine; radiation chemistry and after-effects of nuclear transformations.
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