Battaglia-Brunet Fabienne, Nancucheo Ivan, Jacob Jérôme, Joulian Catherine
CNRS, BRGM, ISTO, UMR 7327, Université d'Orléans, Orleans, France.
Facultad de Ingeniería, Arquitectura y Diseño, Universidad San Sebastián, Concepción, Chile.
Adv Biochem Eng Biotechnol. 2024;190:1-30. doi: 10.1007/10_2024_264.
Human communities need water and mineral resources, the supply of which requires the implementation of recycling and saving strategies. Both closed and active mining sites could beneficiate of the implementation of nature-based solutions, including bioreactors involving sulphate-reducing prokaryotes (SRP), in order to separate and recover arsenic (As) and metals from aqueous stream while producing clean water. Selective precipitation strategies can be designed based on the selection of microbial communities adapted to the pH conditions, generally acidic, and to available low-cost electron donors. Laboratory batch and continuous experiments must be implemented for each type of mine water in order to determine the optimal flow-sheet in which As could be precipitated as sulphides (orpiment or realgar), inside the bioreactor or offline, through stripping of biologically produced hydrogen sulphides (HS). The respective concentrations and proportions of As and metals and the initial acid mine drainage pH are key parameters that will influence the feasibility of efficient selective precipitation. SRP-based bioreactors could be combined with complementary treatment steps in optimised mine water management solutions that will minimise the production of As-contaminated end-solid waste.
人类社区需要水和矿产资源，而这些资源的供应需要实施回收和节约策略。无论是封闭的还是活跃的采矿场地，都可以从实施基于自然的解决方案中受益，包括使用涉及硫酸盐还原原核生物（SRP）的生物反应器，以便从水流中分离和回收砷（As）和金属，同时生产出清洁的水。可以基于选择适应pH条件（通常为酸性）和可用低成本电子供体的微生物群落来设计选择性沉淀策略。对于每种类型的矿井水，都必须进行实验室批次和连续实验，以确定最佳流程，在该流程中，砷可以在生物反应器内或离线通过生物产生的硫化氢（HS）的汽提沉淀为硫化物（雌黄或雄黄）。砷和金属的各自浓度和比例以及初始酸性矿井排水的pH值是影响高效选择性沉淀可行性的关键参数。基于SRP的生物反应器可以与优化矿井水管理解决方案中的补充处理步骤相结合，这将最大限度地减少含砷最终固体废物的产生。
