In this study, adsorption behavior on UIO-66, UIO-66@mSi-SH and UIO-66@mSi-SO₃H were investigated with a great emphasis on cadmium. The UIO-66@mSi-SH was synthesized by postsynthetic modification with silica layer, and sulfo-functionalized UIO-66 with silica layer (UIO-66@mSi-SO₃H) was obtained from oxidizing UIO-66@mSi-SH with H₂O₂. All prepared adsorbents were characterized by FT-IR, SEM, XRD and BET. The BET value of UIO-66 can reach 1304.59 m² g⁻¹. To fit the adsorption behavior curve of Cd²⁺, the isothermal adsorption curve (Langmuir, Freundlich and D-R models) and kinetic model (Quasi first-order kinetic, Quasi second-order kinetic and Elovich model) were utilized. It shows that the basic mechanism of adsorption process was determined by R², AIC and other constants and the adsorption performance is shown as UIO-66@mSi-SO₃H > UIO-66@mSi-SH > UIO-66. Langmuir and Elovich models showed better fitting results of UIO-66@mSi-SO₃H adsorption process for Cd²⁺, and the R² values were 0.97471 and 0.97817 respectively. The theoretical maximum adsorption capacity of UIO-66@mSi-SO₃H for Cd²⁺ is 409.96 mg g^-1 by Langmuir isothermal adsorption. The UIO-66@mSi-SO₃H shows great adsorption capacity for Cd²⁺ with a surface area of 126.728 m² g⁻¹ and a pore volume of 0.102 cm³ g⁻¹, which is approximately 93.73 % higher than UIO-66. Besides, more than 90 % adsorbents was able to be regenerated in shorter time after 5 cycles.

在这项研究中，对UIO-66，UIO-66 @ mSi-SH和UIO-66 @ mSi-SO ₃ H的吸附行为进行了研究，其中重点研究了镉。UIO-66 @ mSi-SH是通过对二氧化硅层进行后合成改性而合成的，然后通过用UIO-66 @ mSi-SH氧化UIO-66 @ mSi-SH得到磺化官能化的具有二氧化硅层的UIO-66（UIO-66 @ mSi-SO ₃ H）。 H ₂ O ₂。通过FT-IR，SEM，XRD和BET对所有制备的吸附剂进行表征。UIO-66的BET值可以达到1304.59 m ² g ^-1。拟合Cd ²⁺的吸附行为曲线，利用等温吸附曲线（Langmuir，Freundlich和DR模型）和动力学模型（拟一阶动力学，拟二阶动力学和Elovich模型）。结果表明，吸附过程的基本机理是由R ²，AIC等常数决定的，吸附性能表现为UIO-66 @ mSi-SO ₃ H> UIO-66 @ mSi-SH> UIO-66。Langmuir和Elovich模型显示UIO-66 @ mSi-SO ₃ H吸附Cd ^2+的拟合效果更好，R ²值分别为0.97471和0.97817。UIO-66 @ mSi-SO ₃ H对Cd ²⁺的理论最大吸附容量为409.96 mg g ^-1经Langmuir等温吸附。UIO-66 @ mSi-SO ₃ H对Cd ^2+的吸附能力强，表面积为126.728 m ² g ^-1，孔体积为0.102 cm ³ g ^-1，比UIO-66高约93.73％。 66。此外，经过5个循环后，可以在更短的时间内再生出90％以上的吸附剂。