生物吸附
孢粉素
水溶液
吸附
化学吸附
弗伦德利希方程
化学
核化学
朗缪尔吸附模型
响应面法
Box-Behnken设计
朗缪尔
傅里叶变换红外光谱
中心组合设计
色谱法
化学工程
吸附
有机化学
植物
花粉
工程类
生物
作者
Murat Şener,Berkant Kayan,Sema Akay,Belgin Gözmen,Dimitrios Kalderis
标识
DOI:10.1080/19443994.2016.1182449
摘要
The role of Fe-modified sporopollenin (Fe-Sp) biomass in Pb2+ removal from aqueous solutions was investigated by batch biosorption technique. The prepared biosorbent was characterized by scanning electron microscopy, energy-dispersive X-ray spectrometry, and Fourier transform infrared spectroscopy. The influence of pH, contact time, biosorbent dose, and initial concentration on biosorption process were optimized by using a four factor Box–Behnken design combined with response surface methodology. The results indicated a positive adsorption behavior of Fe-Sp and a strong pH dependency of the process. The optimum predicted parameters were determined as follows: biosorbent dosage 0.5 g, pH of 6.75, contact time 104 min, and initial Pb2+ concentration of 25.42 ppm. The Freundlich isotherm model provided a better fit (R2 = 0.994) for the experimental data, indicating biosorption on a heterogeneous surface. Maximum biosorption capacity (qmax) was 22.72 mg g−1 as indicated by the Langmuir isotherm. Kinetically, the adsorption process followed a pseudo-second-order model, indicating that chemisorption was the rate-limiting step.
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