School of Environmental and Municipal Engineering, Xi'an University of Architecture and Technology, Xi'an, 710055, China; Shaanxi Key Laboratory of Environmental Engineering, Xi'an University of Architecture and Technology, Xi'an, 710055, China.
School of Environmental and Municipal Engineering, Xi'an University of Architecture and Technology, Xi'an, 710055, China; Shaanxi Key Laboratory of Environmental Engineering, Xi'an University of Architecture and Technology, Xi'an, 710055, China; State Key Laboratory of Green Building in West China, Xi'an University of Architecture and Technology, Xi'an, 710055, China.
Chemosphere. 2021 Oct;281:130841. doi: 10.1016/j.chemosphere.2021.130841. Epub 2021 May 10.
A batch fluidized bed reactor (BFBR) with modified biosynthetic crystals (MBC), derived from Pseudomonas sp. HXF1, was investigated for the treatment of the groundwater containing fluoride (F). Impacts of different hydraulic retention time (HRT), pH, and initial F concentration on F removal were examined and the maximum defluorination efficiency was recorded as 95.20%. Moreover, recycling experiments were performed to evaluate the stability of repeated use. BFBR/MBC system showed a long-term effective treatment outcome with low fluctuation in the concentrations of residual Ca and F. The formed precipitates were characterized by SEM, XPS, XRD, and FTIR. The defluorination mechanisms of BFBR/MBC system were defined as the chemisorption and induced crystallization of Ca(PO)F on the MBC surface. As a feasible, economical, and environment-friendly technique, the method has a long-term value, which suggests promising applications in F removal and resourceful treatment.
采用从假单胞菌 HXF1 衍生的改良生物合成晶体（MBC）的批式流化床反应器（BFBR）用于处理含有氟化物（F）的地下水。考察了不同水力停留时间（HRT）、pH 值和初始 F 浓度对 F 去除的影响，最大脱氟效率为 95.20%。此外，还进行了回收实验以评估重复使用的稳定性。BFBR/MBC 系统表现出长期有效的处理效果，残留 Ca 和 F 浓度波动较小。通过 SEM、XPS、XRD 和 FTIR 对形成的沉淀物进行了表征。BFBR/MBC 系统的脱氟机制被定义为 Ca(PO)F 在 MBC 表面的化学吸附和诱导结晶。作为一种可行、经济且环保的技术，该方法具有长期价值，有望在 F 去除和资源处理方面得到应用。
