Alaca Avni Çelik Vocational School, Department of Food Processing, Hitit University, Çorum, Turkey.
Faculty of Science and Literature, Department of Chemistry, Hitit University, Çorum, Turkey.
Environ Sci Pollut Res Int. 2018 Sep;25(25):25458-25467. doi: 10.1007/s11356-018-2531-z. Epub 2018 Jun 27.
Endosulfan is a persistent insecticide that is still used in some countries even though it is life-threatening and banned in the agricultural struggle. The solubility of pesticides in water is negligible. It is known that pesticides with better solubility in organic solvents have different solubility when the dielectric constants of these solvents are taken into account. The polymeric structure of arginine was modified with methacrylate to be a functional monomer, and it was immobilized on a solid support, poly(HEMA), and finally, poly(2-hydroxyethyl methacrylate-arginine methacrylate) was obtained and used as an effective adsorbent. The effect of organic solvents on endosulfan adsorption was investigated for the first time in the literature. Endosulfan was removed from alcohol media by using this polymeric structure synthesized by exploiting alcoho-phobic interaction in this work. Nuclear magnetic resonance (NMR), elemental analysis, and Fourier transform infrared spectroscopy (FTIR) methods were used for the structural characterization and therefore to prove successful synthesis of cryogels. Morphological characteristics were also investigated by scanning electron microscopy (SEM), an N adsorption method, and swelling test. Adsorption experiments were carried out against varying interaction time and concentration parameters in the batch system. Since the alcohol used as a solvent has a pH value close to the ionic strength of drinking water, no change was made in the pH of the solution. Endosulfan molecules dissolved in solvents such as toluene, dichloromethane, acetone, and chloroform were removed using poly(HEMA-ArMA) cryogels to determine the solvent effect on the adsorption of endosulfan. As expected, the removal of endosulfan from the solvent toluene provided the best result. Although the adsorption in toluene is almost 9.5 times higher than that in ethanol, the use of toluene in the adsorption process due to its chemical structure is not feasible. Thus, experiments were carried out in ethanol.
硫丹是一种持久性杀虫剂，尽管对生命有威胁并已在农业领域被禁用，但仍在一些国家使用。农药在水中的溶解度可以忽略不计。已知当考虑这些溶剂的介电常数时，在有机溶剂中溶解度更好的农药具有不同的溶解度。通过将丙烯酰胺基修饰到精氨酸的聚合结构上，使其成为一种功能单体，并将其固定在固体载体聚（HEMA）上，最终得到聚（2-羟乙基甲基丙烯酸-精氨酸甲基丙烯酸酯）并将其用作有效的吸附剂。本文首次研究了有机溶剂对硫丹吸附的影响。通过利用本文中利用疏水性相互作用合成的聚合结构，从醇介质中去除硫丹。使用核磁共振（NMR）、元素分析和傅里叶变换红外光谱（FTIR）方法进行结构表征，并因此证明了 cryogel 的成功合成。还通过扫描电子显微镜（SEM）、N 吸附法和溶胀试验研究了形态特征。在批处理系统中，针对不同的相互作用时间和浓度参数进行了吸附实验。由于用作溶剂的醇的 pH 值接近饮用水的离子强度，因此溶液的 pH 值没有变化。使用聚（HEMA-ArMA） cryogel 去除溶解在甲苯、二氯甲烷、丙酮和氯仿等溶剂中的硫丹分子，以确定溶剂对硫丹吸附的影响。不出所料，从溶剂甲苯中去除硫丹的效果最好。尽管在甲苯中的吸附几乎是乙醇中的 9.5 倍，但由于其化学结构，在吸附过程中使用甲苯是不可行的。因此，在乙醇中进行了实验。
