Development of a new adsorbent from agro-industrial waste and its potential use in endocrine disruptor compound removal.
Development of a new adsorbent from agro-industrial waste and its potential use in endocrine disruptor compound removal.
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DOI：
10.1016/j.jhazmat.2014.02.004
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发表时间：
2014-04
影响因子：
13.6
通讯作者：
S. Rovani;M. T. Censi;S. Pedrotti;E. Lima;R. Cataluña;A. Fernandes
中科院分区：
文献类型：
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作者：
S. Rovani;M. T. Censi;S. Pedrotti;E. Lima;R. Cataluña;A. Fernandes
以咖啡渣、桉树木屑、氢氧化钙和大豆油为原料，在800℃下热解制备了一种新型活性炭材料。该材料作为吸附剂用于去除水溶液中内分泌干扰物17β-雌二醇（E2）和17α-炔雌醇（EE2）。采用扫描电镜（SEM）、红外光谱（FTIR）、n2吸附/解吸曲线和零电荷点（pHPZC）对碳材料进行了表征。对吸附溶液的初始pH、吸附剂质量和接触时间等参数进行了优化。去除内分泌干扰物（EDC）的最佳初始pH范围为2.0 ~ 11.0。采用一般级、准一级和准二级动力学模型研究了吸附动力学。Sips等温线模型对298k的平衡数据拟合最好。在298 K时，以AC为吸附剂，E2和EE2的最大去除率分别为7.584 mg g−1和7.883 mg g−1（EE2）。采用碳吸附剂固相萃取法从水溶液中分离E2和EE2。
A new activated carbon (AC) material was prepared by pyrolysis of a mixture of coffee grounds, eucalyptus sawdust, calcium hydroxide and soybean oil at 800 °C. This material was used as adsorbent for the removal of the endocrine disruptor compounds 17β-estradiol (E2) and 17α-ethinylestradiol (EE2) from aqueous solutions. The carbon material was characterized by scanning electron microscopy (SEM), infrared spectroscopy (FTIR), N2adsorption/desorption curves and point of zero charge (pHPZC). Variables including the initial pH of the adsorbate solutions, adsorbent masses and contact time were optimized. The optimum range of initial pH for removal of endocrine disruptor compounds (EDC) was 2.0–11.0. The kinetics of adsorption were investigated using general order, pseudo first-order and pseudo-second order kinetic models. The Sips isotherm model gave the best fits of the equilibrium data (298 K). The maximum amounts of E2 and EE2 removed at 298 K were 7.584 (E2) and 7.883 mg g−1(EE2) using the AC as adsorbent. The carbon adsorbent was employed in SPE (solid phase extraction) of E2 and EE2 from aqueous solutions.