Wang Jianyan, Chen Jing, Li Qiumei, Zhang Gaosheng
Key Laboratory of Coastal Environmental Processes and Ecological Remediation, Yantai Institute of Coastal Zone Research (YIC), Chinese Academy of Science (CAS), Yantai 264003, China E-mail:
School of Ocean, Yantai University, 32th Qingquan Road, Yantai 264005, China.
Water Sci Technol. 2019 May;79(10):1995-2004. doi: 10.2166/wst.2019.198.
Given the adverse health effects of antimony (Sb), there is an increased focus on developing methods to remove this toxic metal from contaminated water bodies. To effectively remove Sb(V), a new nanostructured Fe-Cu-Al trimetal oxide was fabricated using co-precipitation method at ambient temperature. The Fe-Cu-Al trimetal oxide was very effective at removing Sb(V) from water; it had a maximal adsorption capacity of 169.1 mg/g at pH 7.0, a capacity that was competitive with most other reported adsorbents. The obtained amorphous oxide had a high pH point of zero charge (pH = 8.8) and good adsorption Sb(V) efficiency over a wide pH range (4.0-8.0). Sb(V) uptake was achieved mainly through an ion-exchange reaction between Sb(V) ions and hydroxyl groups on the surface of the oxide. Given its good removal performance, high selectivity, and simple synthesis, this novel Fe-Cu-Al trimetal oxide offers a promising alternate for removing antimony contamination from aquatic environments.
鉴于锑（Sb）对健康的不利影响，人们越来越关注开发从受污染水体中去除这种有毒金属的方法。为了有效去除Sb(V)，采用共沉淀法在室温下制备了一种新型的纳米结构铁-铜-铝三金属氧化物。铁-铜-铝三金属氧化物在从水中去除Sb(V)方面非常有效；在pH 7.0时，其最大吸附容量为169.1 mg/g，该容量与大多数其他报道的吸附剂相比具有竞争力。所获得的无定形氧化物具有较高的零电荷点pH值（pH = 8.8），并且在较宽的pH范围（4.0 - 8.0）内具有良好的吸附Sb(V)效率。Sb(V)的摄取主要通过Sb(V)离子与氧化物表面羟基之间的离子交换反应实现。鉴于其良好的去除性能、高选择性和简单的合成方法，这种新型的铁-铜-铝三金属氧化物为去除水环境中的锑污染提供了一种有前景的替代方法。
