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首页> 外文期刊>ACS Omega >Adsorption of Hg(II) in an Aqueous Solution by Activated Carbon Prepared from Rice Husk Using KOH Activation
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Adsorption of Hg(II) in an Aqueous Solution by Activated Carbon Prepared from Rice Husk Using KOH Activation

机译：使用KOH活化通过稻壳制备的活性炭在水溶液中吸附HG（II）

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摘要

With the development of industry, the discharge of wastewater containing mercury ions posed a serious threat to human health. Using biomass waste as an adsorbent to treat wastewater containing mercury ions was a better way due to its positive impacts on the environment and resource saving. In this research, activated carbon (AC) was prepared from rice husk (RH) by the KOH chemical activation method. The characterization results of scanning electron microscopy (SEM), Brunauer–Emmett–Teller (BET), Fourier transform infrared (FTIR), Raman spectroscopy, and X-ray photoelectron spectroscopy (XPS) showed that rice husk-activated carbon (RHAC) had good pore structure and oxygen-containing functional groups. The influences of contact time, initial concentration of Hg(II), adsorbent dosage, pH, and ionic strength on mercury ion removal were investigated. The Langmuir model was most suitable for the adsorption isotherm of RHAC, and its maximum adsorption capacity for Hg(II) was 55.87 mg/g. RHAC still had a high removal capacity for Hg(II) after five regeneration cycles. RHAC had excellent removal efficiency for mercury ion wastewater. At the same time, RH could be used as a nonpolluting and outstanding characteristic adsorbent material.
机译：随着行业的发展，含汞水溶液的排放对人体健康构成严重威胁。使用生物质废物作为吸附剂，以处理含汞的废水是一种更好的方法，因为它对环境和资源储蓄的积极影响。在本研究中，通过KOH化学活化法从稻壳（RH）中制备活性炭（AC）。扫描电子显微镜（SEM），Brunauer-Emmett-Teller（Bet），傅里叶变换红外（FTIR），拉曼光谱和X射线光电子能谱（XP）的表征结果表明，稻壳活性炭（RHAC）有良好的孔结构和含氧官能团。研究了接触时间，初始浓度的Hg（ii），吸附剂剂量，pH和离子强度对汞离子去除的影响。 Langmuir模型最适用于RHAC的吸附等温线，其HG（II）的最大吸附能力为55.87mg / g。在五个再生循环后，rhac仍然对HG（II）的去除容量高。 RHAC对汞离子废水具有优异的去除效率。与此同时，RH可用作非污染和出色的特征吸附材料。

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