摘要
以松果为原料制备生物吸附剂,通过等温吸附模型和吸附动力学模型对吸附过程进行拟合,分析松果对左氧氟沙星的吸附特征,并考察了左氧氟沙星的最佳吸附条件。结果表明,最佳的吸附条件为p H为8,温度为40℃,吸附剂用量为0.8 g/L,最大吸附量为104.17 mg/g。吸附过程能较好被准二级动力学方程(R2>0.99)和Langmuir等温吸附模型(R2>0.99)拟合。以农业废弃物松果制备出价廉、高效的新型生物吸附剂,为水体中抗生素的处理提供了一种新的方法。
Adsorbent was prepared using pinecone as raw material. The adsorption mechanism was proposed by studying ad- sorption isotherm model and adsorption kinetic equation. The effect of adsorption time, initial levofloxacin concentration, pH, temperature and dosage of adsorbent on adsorption capacity was investigated. Optimum condition is as follows ： pH 8, temperature 40℃ , dosage of adsorbent 0. 8 g/L. The largest amount of levofloxaein by pinecone was up to 104. 17 mg/g. Adsorption process could be well described by pseudo - second - order kinetic model （ R2 〉 0. 99） and Langmuir adsorption isotherm model （ R2 〉 0. 99）. The results indicated that pinecone was a new, effective bioadsorbent for levofloxacin in wastewater.
出处
《环境科学与管理》
CAS
2015年第4期93-96,共4页
Environmental Science and Management
