Removal of phosphorus from water via cost-effective measures becomes important for water industry mainly due to eutrophication in waterbody. In our lab, a novel lanthanum carbonate-microfibrous composite (LC-MC) with good performance was previously synthesized for the removal of phosphorus. In this study, we further improved our technology by applying the electrostatic field (direct current, DC) to the adsorption system. It was showed that the applied DC can greatly improve the adsorption of phosphate in particular the adsorption capacity. Better removal was seen in the pH range of 5–9 at a higher temperature. The maximum adsorption capacity of 47.57 mg-${\text{PO}}_4^{3-}$ g⁻¹ was achieved, which was 1.4 times of that operated in the absence of applied DC. The adsorption equilibrium was established at the contact time of 240 min; the adsorption history was well described by the intraparticle surface diffusion model. The negative effect from oxygen-containing anions on the phosphate uptake followed the decreasing sequence of: humic acid > carbonate > nitrate > sulfate; on the other hand, the halogen anions had almost no influence on it. Finally, the mechanism study by XPS, XRD, and IR demonstrated that the ligand exchange played an important role in the electro-assisted phosphate uptake process.

主要由于水体富营养化，通过具有成本效益的措施从水中去除磷对水工业变得重要。在我们的实验室中，以前合成了一种性能良好的新型碳酸镧-微纤维复合材料（LC-MC），用于除磷。在这项研究中，我们通过将静电场（直流电，DC）应用于吸附系统，进一步改进了我们的技术。结果表明，施加的直流电可以大大提高磷酸盐的吸附能力，特别是吸附能力。在较高温度下，在5–9的pH范围内，去除效果更好。最大吸附量为47.57 mg-${\text{PO}}_4^{3-}$达到g ^-1，是没有施加直流电时的1.4倍。在240分钟的接触时间建立了吸附平衡。颗粒内表面扩散模型很好地描述了吸附历史。含氧阴离子对磷酸盐吸收的负面影响依次为：腐殖酸>碳酸盐>硝酸盐>硫酸盐；另一方面，卤素阴离子几乎没有影响。最后，通过XPS，XRD和IR进行的机理研究表明，配体交换在电辅助磷酸盐吸收过程中起着重要作用。