Chair of Environmental Chemistry and Bioanalytics, Faculty of Chemistry, Nicolaus Copernicus University, Toruń, Poland.
Colloids Surf B Biointerfaces. 2012 Jun 1;94:7-14. doi: 10.1016/j.colsurfb.2011.12.024. Epub 2012 Jan 18.
Adsorption kinetics of zearalenone (ZEA) toxin from synthetic gastric fluid (SGF) and synthetic body fluid (SBF) by talc and diatomite was studied in the batch experiments. Chemical composition, morphology and structure of the used adsorbents were examined by scanning electron microscopy, FTIR spectroscopy and low-temperature nitrogen adsorption/desorption method. High performance liquid chromatography (HPLC) method was used for ZEA determining. The study results showed that ZEA is more effectively adsorbed on the talc (73% and 54% from SGF and SBF respectively). The efficiency on the diatomite was lower (53% and 42% from SGF and SBF respectively). The first order kinetics model was applied to describe the adsorption process. Rate of the ZEA adsorption from SGF is very rapid initially with about 95% of amount of the toxin adsorbed during first 5 min, while ZEA is adsorbed from SBF in two steps. The values of determined Gibbs free energy of adsorption (from -13 to -17 kJ/mol) indicated that adsorption of ZEA toxin by the both adsorbents are spontaneous and exothermic.
滑石和硅藻土对合成胃液（SGF）和合成体液（SBF）中玉米赤霉烯酮（ZEA）毒素的吸附动力学进行了批量实验研究。通过扫描电子显微镜、傅里叶变换红外光谱和低温氮吸附/脱附法对所用吸附剂的化学组成、形貌和结构进行了检查。采用高效液相色谱（HPLC）法测定 ZEA。研究结果表明，ZEA 更有效地被滑石吸附（分别从 SGF 和 SBF 中吸附 73%和 54%）。硅藻土的效率较低（分别从 SGF 和 SBF 中吸附 53%和 42%）。一级动力学模型适用于描述吸附过程。ZEA 从 SGF 中的吸附初始速度非常快，在最初的 5 分钟内吸附了约 95%的毒素，而 ZEA 从 SBF 中吸附分两步进行。测定的吸附吉布斯自由能（从-13 到-17 kJ/mol）表明，两种吸附剂对 ZEA 毒素的吸附都是自发和放热的。
