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Sustainable environmental remediation approach for biocide removal from water medium: a model biosorption study using activated biological waste
International Journal of Phytoremediation ( IF 3.7 ) Pub Date : 2020-07-29 , DOI: 10.1080/15226514.2020.1798872
Fatih Deniz 1 , Hatice Bural 2
Affiliation  

Abstract

Within the scope of sustainable environmental remediation approach, a biosorbent prepared from the waste of Zostera marina coastal plant with chemical activation was used to effectively remove malachite green as a common biocidal agent from water environment in this work. The biocide treatment ability of activated biosorbent was interpreted through the characterization, optimization, equilibrium, thermodynamic, and kinetic studies. The characterization research showed that the biosorbent has an uneven surface and various active groups for the retention of biocide molecules. Langmuir isotherm was found to be the most appropriate model for the experimental equilibrium data. The maximum monolayer biosorption capacity was obtained as 103.834 mg g−1 under the optimum conditions (time of 6 h, pH of 4, temperature of 25 °C, biosorbent amount of 10 mg, and biocide concentration of 15 mg L−1). The biosorption system was determined to be spontaneous and exothermic in thermodynamic aspect. The experimental kinetic data were best described by the pseudo-second-order model. All these results indicated that the activated biological residue could be used as an environmentally friendly and effective biosorbent for the biocide removal from water environment in a sustainable way.



中文翻译:

从水介质中去除杀生物剂的可持续环境修复方法:使用活化生物废物的生物吸附模型研究

摘要

在可持续环境修复方法的范围内,这项工作中使用了一种由Zostera marina沿海植物废料制成的生物吸附剂,并对其进行了化学活化,从而有效地从水环境中去除了作为常见杀菌剂的孔雀石绿。通过表征,优化,平衡,热力学和动力学研究来解释活化生物吸附剂的杀菌剂处理能力。表征研究表明,该生物吸附剂具有不平坦的表面和用于保留杀生物剂分子的各种活性基团。发现Langmuir等温线是用于实验平衡数据的最合适模型。获得的最大单层生物吸附容量为103.834 mg g -1在最佳条件下(时间为6小时,pH为4,温度为25°C,生物吸附量为10 mg,杀生物剂浓度为15 mg L -1)。在热力学方面,确定该生物吸附系统是自发的并且放热的。实验动力学数据最好用伪二级模型来描述。所有这些结果表明,活化的生物残余物可以用作环境友好和有效的生物吸附剂,以可持续的方式从水环境中去除杀生物剂。

更新日期:2020-07-29
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