There is a need to remove arsenic (As) in drinking water supplies by simple and cost-effective techniques. A column adsorption study was conducted to remove As(V) from water employing an iron (Fe) and zirconium (Zr) grafted Vietnamese manganese oxide ore (Fe^a-VMO and Zr^a-VMO). At a flow rate of 0.15 L/h, the bed volumes of water (As(V) concentration 0.1 mg/L) treated by Zr^a-VMO and Fe^a-VMO to produce water with As(V) concentration below the WHO guideline concentration (10 μg/L) were 6 and 8 times higher than for VMO, respectively. An increase in influent As concentration increased the adsorption capacity, but the increase of flow rate reduced the adsorption capacity. The maximum adsorption capacities derived from the Thomas model for VMO, Fe^a-VMO, and Zr^a-VMO at an influent concentration of 0.25 mg As(V)/L and flow rate of 0.15 L/h were 0.151, 1.145, and 0.925 mg/g, respectively. These values fell when influent As concentration decreased or the flow rate increased. Solidification/stabilisation method was applied to immobilise As(V) in the exhausted absorbent wastes by replacing 5, 10, 15, and 20 % of sand in a sand/cement concrete mixture by the adsorbent waste. This solidified material had satisfactory compressive strength, rapid chloride penetrability test, and volume of permeable voids, which indicated the material had good stability, making it suitable for use as a building material in construction work. The As(V) leaching from these materials, as measured by Method 1313 of the Leaching Environmental Assessment Framework of USEPA, proved to be very negligible.

需要通过简单且具有成本效益的技术去除饮用水供应中的砷（As）。进行了柱吸附研究，以使用铁（Fe）和锆（Zr）接枝的越南锰氧化物矿石（Fe ^a -VMO和Zr ^a -VMO）从水中除去As（V ）。流量为0.15 L / h时，经Zr ^a -VMO和Fe ^a处理的水床体积（As（V）浓度0.1 mg / L）-VMO生产的As（V）浓度低于WHO指导浓度（10μg/ L）的水分别比VMO高6倍和8倍。随着进水浓度的增加，吸附量增加，但是流速的增加降低了吸附量。从托马斯模型得出的VMO，Fe ^a -VMO和Zr ^a的最大吸附容量进水浓度为0.25 mg As（V）/ L和流速为0.15 L / h的-VMO分别为0.151、1.145和0.925 mg / g。当进水浓度降低或流速增加时，这些值下降。固化/稳定化方法通过将吸附剂废料替换为沙子/水泥混凝土混合物中的5％，10％，15％和20％的沙子，从而将废旧吸收剂废料中的As（V）固定化。该固化材料具有令人满意的抗压强度，快速的氯离子渗透性测试和渗透性空隙的体积，这表明该材料具有良好的稳定性，使其适合用作建筑工程中的建筑材料。经美国环保局“浸出环境评估框架”的方法1313测得，从这些材料中浸出的砷（V）可以忽略不计。