A facile, versatile approach to hydroxyl-anchored metal oxides with high Cr(VI) adsorption performance in water treatment
In this study, a facile and versatile urea-assisted approach was proposed to synthesize Chinese rose-like NiO, pinecone-like ZnO and sponge-like CoO adsorbents. The presence of urea during syntheses endowed these adsorbents with high concentration of surface hydroxyl groups, which was estimated as 1...
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| Format: | Article |
| Language: | English |
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The Royal Society
2016-01-01
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| Series: | Royal Society Open Science |
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| Online Access: | https://royalsocietypublishing.org/doi/pdf/10.1098/rsos.160524 |
| _version_ | 1819115662144962560 |
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| author | Ji Ma SiZhi Zuo-Jiang Yunhao He Qinglei Sun Yunguo Wang Wei Liu Shuangshuang Sun Kezheng Chen |
| author_facet | Ji Ma SiZhi Zuo-Jiang Yunhao He Qinglei Sun Yunguo Wang Wei Liu Shuangshuang Sun Kezheng Chen |
| author_sort | Ji Ma |
| collection | DOAJ |
| description | In this study, a facile and versatile urea-assisted approach was proposed to synthesize Chinese rose-like NiO, pinecone-like ZnO and sponge-like CoO adsorbents. The presence of urea during syntheses endowed these adsorbents with high concentration of surface hydroxyl groups, which was estimated as 1.83, 1.32 and 4.19 mmol [OH−] g−1 for NiO, ZnO and CoO adsorbents, respectively. These surface hydroxyl groups would facilitate the adsorption of Cr(vi) species (e.g. HCrO4−, Cr2O72− and CrO42−) from wastewater by exchanging with hydroxyl protons or hydroxide ions, and hence result in extremely high maximum adsorbed amounts of Cr(vi), being 2974, 14 256 and 408 mg g−1 for NiO, ZnO and CoO adsorbents in the pH range of 5.02–5.66 at 298 K, respectively. More strikingly, the maximum adsorbed amounts of Cr(vi) would be greatly enhanced as the adsorbing temperature is increased, and even amount to 23 411 mg g−1 for ZnO adsorbents at 323 K. Based on the kinetics and equilibrium studies of adsorptive removal of Cr(vi) from wastewater, our synthetic route will greatly improve the adsorptivity of the as-synthesized metal-oxide adsorbents, and hence it will shed new light on the development of high-performance adsorbents. |
| first_indexed | 2024-12-22T05:04:45Z |
| format | Article |
| id | doaj.art-ab29f3defba143beaef870ab74e6e45e |
| institution | Directory Open Access Journal |
| issn | 2054-5703 |
| language | English |
| last_indexed | 2024-12-22T05:04:45Z |
| publishDate | 2016-01-01 |
| publisher | The Royal Society |
| record_format | Article |
| series | Royal Society Open Science |
| spelling | doaj.art-ab29f3defba143beaef870ab74e6e45e2022-12-21T18:38:09ZengThe Royal SocietyRoyal Society Open Science2054-57032016-01-0131110.1098/rsos.160524160524A facile, versatile approach to hydroxyl-anchored metal oxides with high Cr(VI) adsorption performance in water treatmentJi MaSiZhi Zuo-JiangYunhao HeQinglei SunYunguo WangWei LiuShuangshuang SunKezheng ChenIn this study, a facile and versatile urea-assisted approach was proposed to synthesize Chinese rose-like NiO, pinecone-like ZnO and sponge-like CoO adsorbents. The presence of urea during syntheses endowed these adsorbents with high concentration of surface hydroxyl groups, which was estimated as 1.83, 1.32 and 4.19 mmol [OH−] g−1 for NiO, ZnO and CoO adsorbents, respectively. These surface hydroxyl groups would facilitate the adsorption of Cr(vi) species (e.g. HCrO4−, Cr2O72− and CrO42−) from wastewater by exchanging with hydroxyl protons or hydroxide ions, and hence result in extremely high maximum adsorbed amounts of Cr(vi), being 2974, 14 256 and 408 mg g−1 for NiO, ZnO and CoO adsorbents in the pH range of 5.02–5.66 at 298 K, respectively. More strikingly, the maximum adsorbed amounts of Cr(vi) would be greatly enhanced as the adsorbing temperature is increased, and even amount to 23 411 mg g−1 for ZnO adsorbents at 323 K. Based on the kinetics and equilibrium studies of adsorptive removal of Cr(vi) from wastewater, our synthetic route will greatly improve the adsorptivity of the as-synthesized metal-oxide adsorbents, and hence it will shed new light on the development of high-performance adsorbents.https://royalsocietypublishing.org/doi/pdf/10.1098/rsos.160524water treatmentmetal oxidesadsorptionchromium |
| spellingShingle | Ji Ma SiZhi Zuo-Jiang Yunhao He Qinglei Sun Yunguo Wang Wei Liu Shuangshuang Sun Kezheng Chen A facile, versatile approach to hydroxyl-anchored metal oxides with high Cr(VI) adsorption performance in water treatment Royal Society Open Science water treatment metal oxides adsorption chromium |
| title | A facile, versatile approach to hydroxyl-anchored metal oxides with high Cr(VI) adsorption performance in water treatment |
| title_full | A facile, versatile approach to hydroxyl-anchored metal oxides with high Cr(VI) adsorption performance in water treatment |
| title_fullStr | A facile, versatile approach to hydroxyl-anchored metal oxides with high Cr(VI) adsorption performance in water treatment |
| title_full_unstemmed | A facile, versatile approach to hydroxyl-anchored metal oxides with high Cr(VI) adsorption performance in water treatment |
| title_short | A facile, versatile approach to hydroxyl-anchored metal oxides with high Cr(VI) adsorption performance in water treatment |
| title_sort | facile versatile approach to hydroxyl anchored metal oxides with high cr vi adsorption performance in water treatment |
| topic | water treatment metal oxides adsorption chromium |
| url | https://royalsocietypublishing.org/doi/pdf/10.1098/rsos.160524 |
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