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为制备高效Cd(Ⅱ)吸附剂,首先,采用正向滴定法将聚合羟基铝(Al13)加入到氧化石墨烯(GO)的悬浮液中,以GO为基体制备了氧化石墨烯-聚合羟基铝复合材料(GO-Al13);然后,利用XRD、FTIR和SEM等分析技术对GO-Al13进行表征,并将10mg GO-Al13添加至50mL初始浓度为10mg/L的Cd(Ⅱ)废水中进行吸附实验,研究了GO-Al13对Cd(Ⅱ)的去除效果。结果表明:[Al13]7+离子会与GO的含氧官能团发生作用,产生Al—O基团;将[Al13]7+离子加入到GO中后,GO-Al13的表面形貌与GO相比会发生较大改变,出现不规则的凹凸结构,且粗糙程度也大幅度增加;当废水中Cd(Ⅱ)的初始浓度为10mg/L、初始pH为6.0时,去除率可达98.92%。所得结论显示GO-Al13对Cd(Ⅱ)的去除效果较好。
In order to prepare highly efficient Cd (Ⅱ) adsorbents, firstly, the titania solution was prepared by adding titania to the suspension of graphene oxide (GO) by the forward titration method. GO was used as the substrate to prepare the graphene oxide- (GO-Al13). Then GO-Al13 was characterized by XRD, FTIR and SEM, and 10 mg GO-Al13 was added to 50 mL Cd (Ⅱ) wastewater with an initial concentration of 10 mg / L for adsorption Experiments were conducted to study the removal of Cd (Ⅱ) by GO-Al13. The results show that the [Al13] 7+ ions interact with the oxygen-containing functional groups of GO to produce Al-O groups. The addition of [Al13] 7+ ions to GO results in the morphology of GO- When the initial concentration of Cd (Ⅱ) in wastewater is 10 mg / L and the initial pH is 6.0, the removal rate can be as high as 98.92%. The results show that GO-Al13 has a good removal of Cd (Ⅱ).