摘要
A porous lanthanum(La)carbonate-carbon composite(LaCC)was prepared by vacuum-freeze-drying and pyrolysis techniques to remove phosphorus(P)from wastewater.Using polyethylene glycol as a carbon skeleton template,and the organic ligands are removed during pyrolysis,resulting in the creation of many pore structures.The LaCC showed excellent P removal performance and selectivity over a wide p H range(3–10).It exhibited a rapid adsorption rate and could hold up to 119.5 mg P/g.Fixed-bed column experiments showed that under dynamic conditions,just 1 g of LaCC effectively treated 60 L of P-contaminated wastewater with an initial concentration of 2 mg/L,meeting the primary discharge standard of<0.5 mg/L according to the comprehensive sewage guidelines of China.Bacterial experiments showed that the LaCC could inhibit the growth of Escherichia coli,indicating that it has both P removal and bacterial inhibition effects,which can greatly improve the application range of adsorbents.
基金
supported by Science and Technology Talent and Platform Program of Yunnan Provincial Science and Technology Department(No.202305AM070001)
Zhaotong Phoenix Plan(2021)
Double-First Class University Plan(No.C176220100042)
the Postgraduate Research and Innovation Foundation of Yunnan University(No.KC-23234662)。
