Technical University Gheorghe Asachi of Iasi, Faculty of Chemical Engineering and Environmental Protection "Cristofor Simionescu", Department of Environmental Engineering and Management, 700050, Iaşi, Romania.
"Al. I. Cuza" University of Iasi, Faculty of Geography and Geology, Department of Geology and Geochemistry, 700506, Iaşi, Romania; Romanian Academy, Filial of Iasi, Collective of Geography, 700506, Iaşi, Romania.
J Environ Manage. 2018 Oct 15;224:288-297. doi: 10.1016/j.jenvman.2018.07.066. Epub 2018 Jul 23.
Biosorption is considered one of the most promising methods for removal of metal ions from aqueous effluents, due to its low-cost and eco-friendly characteristics. However, the exhausted biosorbents loaded with metal ions, obtained at the end of biosorption processes, are still a problem which should be solved to increase the applicability of biosorption on an industrial scale. In this study are examined three possibilities for the valorisation of exhausted biosorbents loaded with metal ions, namely: (i) regeneration and reuse of biosorbents in multiple biosorption cycles, (ii) the use of exhausted biosorbents as fertilizers for soils poor in essential microelements, and (iii) the pyrolysis of exhausted biosorbents, under well defined conditions. The main advantages and disadvantages of each valorisation possibility are reviewed in order to find the best way to use these cheap materials in accordance with the principles of the circular economy and thereby contributing to the development of sustainable biosorption technology.
生物吸附被认为是从水废水中去除金属离子最有前途的方法之一，因为它具有低成本和环保的特点。然而，在生物吸附过程结束时获得的负载金属离子的耗尽生物吸附剂仍然是一个需要解决的问题，以提高生物吸附在工业规模上的适用性。在这项研究中，研究了三种利用负载金属离子的耗尽生物吸附剂的方法，即：(i) 在多个生物吸附循环中再生和再利用生物吸附剂，(ii) 将耗尽的生物吸附剂用作贫微量元素土壤的肥料，以及 (iii) 在适当的条件下热解耗尽的生物吸附剂。为了找到使用这些廉价材料的最佳方法，根据循环经济的原则，综述了每种增值可能性的主要优点和缺点，从而有助于可持续生物吸附技术的发展。
