Synthesis of polyaminophosphonated-functionalized hydrochar for efficient sorption of Pb(II)
Synthesis of polyaminophosphonated-functionalized hydrochar for efficient sorption of Pb(II)
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高效吸附 Pb(II) 的聚氨基磷酸化功能化水炭的合成
DOI：
10.1007/s11356-022-19350-4
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发表时间：
2022-02
影响因子：
5.8
通讯作者：
Huan Xu
中科院分区：
文献类型：
--
作者：
Bing Li;Jia-Lin Liu;Huan Xu
表面改性能够有效提高水热炭从废水中捕获污染物的能力。在这项工作中，通过化学接枝方法成功合成了多氨基膦酸功能化水热炭（PAP - HC），并应用于……（原文“applied eff”不完整）
Surface modification can effectively improve the ability of hydrochar to capture pollutants from wastewater. In this work, polyaminophosphonated-functionalized hydrochar (PAP-HC) was successfully synthesized by a chemical grafting approach and applied efficiently to adsorb aqueous Pb(II). Properties of PAP-HC were characterized by ICP, FTIR, XPS, SEM-EDS, elemental analysis, zeta potential, and BET. The Pb(II) adsorbing behavior of PAP-HC was tested by batch adsorbing assays, including the pH impact, uptake kinetics, sorption isotherms, sorption thermodynamics, and PAP-HC recycling. Sorption isotherms were better illustrated by a Langmuir equation, while the kinetic profile was modeled by a pseudo-second-order equation. Adsorption of Pb(II) onto PAP-HC mainly relied on chelating Pb(II) with aminophosphonate groups of PAP-HC by XPS and FTIR analyses. The actual adsorbed amount of PAP-HC maximized to 179.92 mg·g-1at 298 K, which showed high adsorption ability. Nitric acid and hydroxide solutions were suitable for desorption of adsorbed Pb(II) and activated PAP-HC, respectively. PAP-HC can be reused for at least five cycles without obvious change in adsorption performance. The results suggest PAP-HC is a prospective adsorbent to capture Pb(II) from wastewater.
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发表时间：
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