This study focused on the stabilization of lead glass sludge (LGS) using reactive magnesia (MgO) via the fabrication of lightweight building bricks. Two types of MgO with different reactivities were prepared by the thermal treatment of magnesium carbonate at 800 °C and 1200 °C (MgO-800 and MgO-1200, respectively). The fabrication of bricks and Pb stabilization were performed by wet mixing LGS with MgO followed by humidity incubation. Results showed that the Pb immobilization and performance of the produced bricks were strongly affected by MgO reactivity, curing time, and LGS–MgO weight ratios. Pb immobilization was performed by the transformation of soluble lead into an insoluble hydrocerussite phase, particularly in hydrated mixtures with high MgO content (˃25 wt.%). Pb immobilization inside a magnesium silicate hydrate skeleton is the main mechanism in the hydrated samples containing 25 wt.% MgO. To achieve “sustainability,” we recommend the use of a hydrated mixture containing 75 wt.% of LGS and 25 wt.% of MgO-800 in the production of building bricks because this mixture exhibits high compressive strength, high Pb immobilization, low energy demand, and low environmental pollution.

这项研究的重点是通过制造轻质建筑砖，使用反应性氧化镁（MgO）来稳定铅玻璃污泥（LGS）。通过在800°C和1200°C下对碳酸镁进行热处理，可以制备出两种具有不同反应性的MgO（分别为MgO-800和MgO-1200）。通过将LGS与MgO湿式混合，然后进行湿度培养来进行砖的制造和Pb的稳定化。结果表明，生产的砖的Pb固定和性能受MgO反应性，固化时间和LGS-MgO重量比的强烈影响。铅的固定是通过将​​可溶性铅转化为不溶的水铁矿相进行的，尤其是在具有高MgO含量（约25 wt。％）的水合混合物中。在含有25 wt。％MgO的水合样品中，将Pb固定在硅酸镁水合物骨架中是主要机理。为了实现“可持续性”，我们建议在建筑砖的生产中使用含有75 wt。％LGS和25 wt。％MgO-800的水合混合物，因为这种混合物具有高抗压强度，高Pb固定性，低能耗需求大，环境污染小。