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通过原子吸收光谱法研究了在不同pH、吸附剂量、Pb2+浓度和吸附时间条件下磷酸酯化改性梨渣吸附Pb2+的行为。结果表明:溶液初始pH 4.2时,Pb2+的吸附达到最大值;酯化梨渣≥10 g/L能除去Pb2+为30 mg/L溶液中的91%的Pb2+。酯化梨渣对Pb2+的吸附符合Langmuir等温模型,其最大吸附能力为43.99 mg/g。Pb2+达到吸附平衡的时间为40 min,准一级反应动力学方程可描述酯化梨渣对Pb2+的吸附过程。
Atomic absorption spectroscopy was used to study the adsorption of Pb2 + by phosphatizing pear residue under different pH, adsorbent dosage, Pb2 + concentration and adsorption time. The results showed that the adsorption of Pb2 + reached the maximum value at the initial pH of 4.2 and 91% of the Pb2 + in Pb2 + was removed when the esterified pear residue ≥ 10 g / L. The adsorption of Pb2 + by esterified pear residue accorded with Langmuir isothermal model and its maximum adsorption capacity was 43.99 mg / g. Pb2 + adsorption equilibrium time to reach 40 min, quasi-first-order reaction kinetics equation can be described Ester pear residue on Pb2 + adsorption process.