摘要：制备具有高吸附容量和吸附速率的吸附剂对有效去除水中的Hg（Ⅱ）具有重要意义。本研究运用高温水热—气相硫化法，制备出一系列钴基金属硫化物材料，包括 CoS-MnS、CoS-FeS、CoS-CuS、CoS-Ni以及CoS。经性能对比，发现CoS-MnS对Hg
(Ⅱ)的吸附效果最为理想，其在水溶液中的吸附容量可达49.8
mg/g。当溶液pH值为5时，CoS-MnS
展现出卓越的吸附性能，此时去除率与吸附容量分别达99.45%与148.64
mg/g。此外，本研究还探究了不同投加量对吸附剂吸附Hg (Ⅱ)的影响，结果显示，当投加量为0.33
g/L时，去除率达到最高值98.11%。通过吸附动力学模型与XPS分析发现，金属Mn与Co的复合使得CoS-MnS吸附剂表面具有丰富的含硫基团，与汞发生化学吸附生成HgS，进而实现对水溶液中二价汞的去除。
关键词：钴基金属硫化物；吸附；Hg（Ⅱ）
Abstract: It
is important to prepare adsorbents with high adsorption capacity and adsorption
rate to effectively remove Hg (Ⅱ) from water. In this study, a series of cobalt sulfide materials
including CoS-MnS、CoS-FeS、CoS-CuS、CoS-Ni and CoS were prepared by
high temperature hydrothermal vapor vulcanization. The adsorption capacity of
CoS-MnS for Hg (Ⅱ) in aqueous
solution was 49.8 mg/g. When the pH value of the solution was 5, CoS-MnS showed
excellent adsorption performance, and the removal rate and adsorption capacity
reached 99.45% and 148.64 mg/g, respectively. In addition, this study also
explored the effects of different dosage on the adsorption of Hg (Ⅱ) by adsorbents, and the results
showed that when the dosage was 0.33 g/L, the removal rate reached the highest
value of 98.11%. Through the adsorption kinetics model and XPS analysis, it was
found that the combination of Mn and Co made the surface of CoS-MnS adsorbent
rich in sulfur-containing groups, which formed HgS by chemical adsorption with
mercury, and then realized the removal of divalent mercury in aqueous solution. Key words:Cobalt based metal sulfides;
adsorption; Hg(Ⅱ)
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