In this study, a novel environmentally friendly diatomite-cross-linked​ $\beta$-Cyclodextrin (DA@$\beta$-CD) adsorbent was synthesized by a one-step synthesis method for the removal of bisphenol A (BPA). The synthesized DA@$\beta$-CD exhibits higher removal capacities for BPA than DA, which is 1.4 to 2.5 times of DA. The factors of influencing DA@$\beta$-CD removal capacities, such as the dosage of DA@$\beta$-CD, the pH, and temperature were investigated. Adsorption isotherms and kinetics followed the Langmuir (R${}_{\mathrm{adj}}^2=0.9942$) and fitted well with pseudo-second-order​ (R${}_{\mathrm{adj}}^2=0.9995$–0.9999) and Langmuir-type kinetic models (R${}_{\mathrm{adj}}^2=0.9825$–0.9984). The intraparticle diffusion and external mass transfer models (EMTM) indicated that the mass transfer of BPA was controlled by external mass transport. The mechanism of removal of BPA in the DA@$\beta$-CD system may be coordinated by three adsorption type pathways. Furthermore, the DA@$\beta$-CD is stable and easy to regenerate with the alkaline solution, and the removal is maintained at 91.15% after three cycles. These results demonstrated that the DA@$\beta$-CD has the potential for practical applications as a green and environmentally friendly adsorbent.

在这项研究中，一种新型的环保硅藻土交联 $\beta$-环糊精（DA @$\beta$-CD）吸附剂是通过一步合成法合成的，用于去除双酚A（BPA）。合成的DA @$\beta$-CD的BPA去除能力比DA高，是DA的1.4到2.5倍。影响DA @的因素$\beta$-CD清除能力，例如DA @的剂量$\beta$研究了-CD，pH和温度。吸附等温线和动力学遵循Langmuir（R${}_{\mathrm{调整}}^{\mathrm{2个}}=0。9942$），并与伪二阶（R${}_{\mathrm{调整}}^{\mathrm{2个}}=0。9995$–0.9999）和Langmuir型动力学模型（R${}_{\mathrm{调整}}^{\mathrm{2个}}=0。9825$–0.9984）。颗粒内扩散和外部传质模型（EMTM）表明，BPA的传质受外部传质控制。DA @中BPA的去除机理$\beta$-CD系统可以通过三种吸附类型的途径来协调。此外，DA @$\beta$-CD稳定且易于在碱性溶液中再生，并且三个循环后的去除率保持在91.15％。这些结果表明DA @$\beta$-CD具有绿色和环保吸附剂的实际应用潜力。