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首页> 美国卫生研究院文献>Molecules >Surface Interactions during the Removal of Emerging Contaminants by Hydrochar-Based Adsorbents
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Surface Interactions during the Removal of Emerging Contaminants by Hydrochar-Based Adsorbents

机译：水炭基吸附剂去除新兴污染物过程中的表面相互作用

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The aim of this work was to test activated carbons derived from hydrochars produced from sunflower stem, olive stone and walnut shells, as adsorbents for emerging contaminants in aqueous solution, namely fluoxetine and nicotinic acid. The adsorption capacity was determined by the chemical nature of the adsorbents, namely the presence of specific functional groups and their positive or negative ionization in aqueous solutions and also by steric factors. The activated carbons produced by air showed a higher adsorption capacity of fluoxetine, whilst the samples produced by carbon dioxide activation were more useful to remove nicotinic acid. In general, surface acidity was advantageous for fluoxetine adsorption and detrimental for nicotinic acid removal. The adsorption mechanisms involved in each case were discussed and related to the adsorbents characteristics. The maximum adsorption capacity, Q , given by the Langmuir model was 44.1 and 91.9 mg g for fluoxetine and nicotinic acid adsorption, respectively.
机译：这项工作的目的是测试从葵花茎，橄榄石和核桃壳产生的碳氢化合物衍生的活性炭，作为对水溶液中新出现的污染物（氟西汀和烟酸）的吸附剂。吸附容量取决于吸附剂的化学性质，即特定官能团的存在及其在水溶液中的正电离或负电离以及空间因素。空气产生的活性炭显示出更高的氟西汀吸附能力，而二氧化碳活化产生的样品对于去除烟酸更有用。通常，表面酸性有利于氟西汀的吸附，不利于烟酸的去除。讨论了每种情况下涉及的吸附机理，并与吸附剂的特性有关。 Langmuir模型给出的最大吸附容量Q对氟西汀和烟酸的吸附分别为44.1和91.9 mg g。

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