To determine the sorption potential and mechanisms of tetracycline (TC) on pristine and H₂O₂-modified biochars, rape stalk biochars were produced and modified by H₂O₂. The specific surface area and pore volume of biochars increased with improving pyrolysis temperature, while the acidic groups decreased. Moreover, modified by H₂O₂, much more oxygen-containing functional groups were introduced. The results of sorption dynamics and isothermals tests showed that RB300 had the largest TC sorption capacity of 35.90 mg/g, which was ascribed to a plenty of non-carbonized organic matter and surface functional groups were retained. Modified by H₂O₂, the sorption of TC on biochars was enhanced which indicated the dominated sorption mechanisms were H-bonding and π–π electron donor acceptor interaction. The pH value would impact on sorption, and the maximum sorption capacity was obtained at pH = 9.0. Both cation concentration and type would affect the TC sorption.

为了确定四环素（TC）在原始和H ₂ O ₂改性生物炭上的吸附潜力和机理，生产了油菜秸秆生物炭并通过H ₂ O ₂对其进行了改性。随着热解温度的提高，生物炭的比表面积和孔体积增加，而酸性基团减少。而且，通过H ₂ O ₂改性，引入了更多的含氧官能团。吸附动力学和等温测试结果表明，RB300的最大TC吸附容量为35.90 mg / g，这归因于大量未碳化的有机物，并且保留了表面官能团。由H ₂ O ₂修饰，TC在生物炭上的吸附增强，表明主要的吸附机理是H键和π-π电子供体受体相互作用。pH值会影响吸附，并且在pH = 9.0时可获得最大吸附容量。阳离子浓度和类型都会影响TC的吸附。