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首页> 外文OA文献 >Efficient Absorption of Antibiotic from Aqueous Solutions over MnO2@SA/Mn Beads and Their In Situ Regeneration by Heterogeneous Fenton-Like Reaction
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Efficient Absorption of Antibiotic from Aqueous Solutions over MnO2@SA/Mn Beads and Their In Situ Regeneration by Heterogeneous Fenton-Like Reaction

机译：高效吸收抗生素在MNO2 / Mn珠粒上的水溶液及其原位再生通过异质芬顿的反应

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摘要

Alginate has been extensively used as absorbents due to its excellent properties. However, the practical application of pure alginate has been restricted since the saturated adsorbent has weak physical structure and could not be regenerated easily. In this study, a low-cost and renewable composite MnO2@alginate/Mn adsorbent has been prepared facilely for the absorptive removal of antibiotic wastewater. FE-SEM, FTIR, and XRD analyses were used to characterize the samples. The norfloxacin (NOR) was used as an index of antibiotics. More specifically, the batch absorption efficiency of the adsorbents was evaluated by pH, contact time with different NOR concentration, and the temperature. Thus, the performance of absorption kinetic dynamics and isotherm equations were estimated for the adsorptive removal process. Parameters including ΔG0, ΔH0, and ΔS0 were utilized to describe the feasible adsorption process. To regenerate the saturated absorptive sites of the adsorbent, the heterogeneous Fenton-like reactions were trigged by introduction of H2O2. The results showed that the in situ regenerating has exhibited an excellent recycling stability. The high activity and the simple fabrication of the adsorbents make them attractive for the treatment of wastewater containing refractory organic compound and also provide fundamental basis and technology for further practical application.
机译：由于其优异的性能，海藻酸盐被广泛地用作吸收剂。然而，由于饱和吸附剂具有弱的物理结构，因此纯海藻酸盐的实际应用已经受到限制，并且不能容易地再生。在该研究中，已经制备了低成本和可再生的复合MNO2 @藻酸盐/ Mn吸附剂，以便吸收除去抗生素废水。 FE-SEM，FTIR和XRD分析用于表征样品。诺氟沙星（NOR）用作抗生素指数。更具体地，通过pH，用不同或浓度的接触时间和温度评估吸附剂的批量吸收效率。因此，估计吸收动力学和等温线方程的性能估计了吸附去除过程。利用包括ΔG0，ΔH0和ΔS0的参数来描述可行的吸附过程。为了再生吸附剂的饱和吸收位点，通过引入H 2 O 2突出了异质的芬顿状反应。结果表明，原位再生表现出优异的再循环稳定性。对吸附剂的高活性和简单的制造使其对含有耐火有机化合物的废水的处理具有吸引力，并为进一步的实际应用提供基础和技术。

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