Universidad de Buenos Aires, Facultad de Ingeniería, Instituto de Química Aplicada a la Ingeniería (IQAI), Laboratorio de Química de Sistemas Heterogéneos (LaQuíSiHe), Buenos Aires, Argentina.
Universidad de Buenos Aires, Facultad de Ingeniería, Laboratorio de Materiales y Estructuras (LaME), Buenos Aires, Argentina.
J Environ Manage. 2023 Sep 15;342:118200. doi: 10.1016/j.jenvman.2023.118200. Epub 2023 Jun 8.
The proposal of effluent treatment systems, based on circular economy principles, is a great challenge that leads to the reduction of waste from other activities, thus reducing the environmental and economic cost of the global process. In this work, buildings demolition waste is proposed to be used for metals removal from industrial effluents. To validate these hypotheses, tests were carried out on batch reactors using Copper, Nickel, and Zinc solutions, in concentrations between 8 and 16 mM. As results, removals greater than 90% were obtained. With these preliminary outcomes, it was decided to use equimolar multicomponent solutions with 8 and 16 mM of these metals in a column packed with demolition waste as adsorbent. From the breakthrough curves, it was observed that the adsorption occurs in the order Copper > Nickel > Zinc. The columns' saturated filler could be safely disposed of by incorporating it into conventional or special mortars and concrete. Preliminary studies on the leaching and resistance of mortars prepared with exhausted adsorbents are also promising. It is concluded that these materials emerge as an economic and sustainable alternative for metal contaminants removal.
基于循环经济原则提出的废水处理系统是一项重大挑战，它可以减少其他活动产生的废物，从而降低全球工艺的环境和经济成本。在这项工作中，拟议利用建筑物拆除废物去除工业废水中的金属。为了验证这些假设，在使用铜、镍和锌溶液的间歇式反应器中进行了浓度在 8 至 16 mM 之间的测试。结果表明，去除率超过 90%。根据这些初步结果，决定在填充有拆除废物的柱中使用等摩尔多组分溶液，其中包含 8 和 16 mM 的这些金属。从突破曲线上可以看出，吸附顺序为铜 > 镍 > 锌。饱和的填充柱可以通过将其掺入传统或特殊的砂浆和混凝土中安全处理。用耗尽的吸附剂制备的砂浆的浸出和阻力的初步研究也很有希望。结论是，这些材料是去除金属污染物的经济和可持续的替代方案。
