CAJ | 학술논문

通过考察掺杂0.5%,5%,15%和30%磁铁矿的土壤吸附雌激素(雌酮(E1)、雌二醇(E2)、雌三醇(E3)、17α-乙炔基雌二醇(EE2)和双酚A(BPA))的热力学规律,探讨磁铁矿存在条件下雌激素在水和土壤中的迁移规律,通过对比吸附前后磁铁矿土壤的红外光谱分析其吸附机理,并利用红外光谱对雌激素的增强吸附机理进行定性分析.结果表明：雌激素吸附的热力学规律符合Langmuir等温式,雌激素吸附是分配作用和表面吸附共同作用的结果；土壤对雌激素的吸附能力随磁铁矿掺杂比例的升高而增强；掺杂0.5%磁铁矿的土壤对 E2和BPA的去除率显著提高；掺杂磁铁矿的土壤对E2具有显著的吸持效果；在吸附过程中掺杂磁铁矿的土壤和雌激素之间,以及雌激素相互之间的氢键作用是雌激素增强吸附的主要因素.
통과고찰참잡0.5%,5%,15%화30%자철광적토양흡부자격소(자동(E1)、자이순(E2)、자삼순(E3)、17α-을결기자이순(EE2)화쌍분A(BPA))적열역학규률,탐토자철광존재조건하자격소재수화토양중적천이규률,통과대비흡부전후자철광토양적홍외광보분석기흡부궤리,병이용홍외광보대자격소적증강흡부궤리진행정성분석.결과표명：자격소흡부적열역학규률부합Langmuir등온식,자격소흡부시분배작용화표면흡부공동작용적결과；토양대자격소적흡부능력수자철광참잡비례적승고이증강；참잡0.5%자철광적토양대 E2화BPA적거제솔현저제고；참잡자철광적토양대E2구유현저적흡지효과；재흡부과정중참잡자철광적토양화자격소지간,이급자격소상호지간적경건작용시자격소증강흡부적주요인소.
The authors aimed at researching the law of migration and transformation of five estrogens (EDCs,estrone (E1 ),estradiol (E2 ),estriol (E3 ),17α-ethynylestradiol (EE2 )and bisphenol A (BPA))in the soil doped with magnetite by means of adsorption and desorption experiments,and analyzing the mechanism via Fourier transform infrared spectroscopy (FTIR).Thermodynamics of the adsorption of endocrine disrupting compounds onto soils doped with magnetite (0.5%,5%,15%and 30%)was investigated.Meanwhile,the mechanism of EDCs adsorption enhanced by magnetite spiked in soils (the magnetite-immobilized soils)was qualitatively analyzed by FTIR.The results indicate that the thermodynamic process conforms with Langmuir isotherm very well, and the adsorption of EDCs onto the magnetite-immobilized soils was the result of both surface adsorption and distribution.With the increase of the doping ratio of magnetite,the adsorption capacity of the magnetite-soil for EDCs was increased.The removal rate of E2 and BPA suggested that magnetite spiked had a significant enhancement for adsorption and removal of EDCs.After twice desorption,the desorption rate of E2 and BPA showed the magnetite-immobilized soils had a good retention capacity for E2.It was found from the FTIR profile that the appearance of hydrogen bonds between the magnetite-immobilized soils on the one hand and EDCs on the other,and EDCs molecule themselves was one of the most important factors affecting the EDCs adsorption.