CAJ | 학술논문

以天然蒙脱石为原料，十六烷基三甲基溴化铵（HDTMAB）为改性剂，制备用于去除水中二氯喹啉酸的吸附剂。借助X射线衍射（XRD）和傅里叶红外光谱仪（FT-IR）对制备的吸附剂进行结构表征，结果表明：HDTMAB成功负载于蒙脱石层间，增大了蒙脱石的层间距。同时，采用批量平衡技术，考察了接触时间、初始浓度、温度、pH值、吸附剂用量对HDTMAB改性蒙脱石对二氯喹啉酸吸附的影响，结果表明：经HDTMAB改性后的蒙脱石对二氯喹啉酸的吸附容量有了显著的提高，其吸附动力学符合准二级动力学模型，化学吸附为速率控制步骤；二氯喹啉酸吸附平衡数据可用Linear和Freundlich模型较好地拟合；在二氯喹啉酸初始浓度为10.00 mg·L-1时，当温度由25℃升高到45℃，HDTMAB改性蒙脱石对二氯喹啉酸的吸附容量从1.86 mg·g-1减小到1.65 mg·g-1，吸附为放热过程；吸附容量随着二氯喹啉酸溶液pH值的增大而减小。
이천연몽탈석위원료，십륙완기삼갑기추화안（HDTMAB）위개성제，제비용우거제수중이록규람산적흡부제。차조X사선연사（XRD）화부리협홍외광보의（FT-IR）대제비적흡부제진행결구표정，결과표명：HDTMAB성공부재우몽탈석층간，증대료몽탈석적층간거。동시，채용비량평형기술，고찰료접촉시간、초시농도、온도、pH치、흡부제용량대HDTMAB개성몽탈석대이록규람산흡부적영향，결과표명：경HDTMAB개성후적몽탈석대이록규람산적흡부용량유료현저적제고，기흡부동역학부합준이급동역학모형，화학흡부위속솔공제보취；이록규람산흡부평형수거가용Linear화Freundlich모형교호지의합；재이록규람산초시농도위10.00 mg·L-1시，당온도유25℃승고도45℃，HDTMAB개성몽탈석대이록규람산적흡부용량종1.86 mg·g-1감소도1.65 mg·g-1，흡부위방열과정；흡부용량수착이록규람산용액pH치적증대이감소。
Natural montmorillonite, characteristized with high hydrophilicity, shows little adsorption of non-polar organic substances. This study examined the adsorption of quinclorac on the montmorillonite modified by hexadecyltrimethyl ammonium bromide(HDTMAB)as influenced by contact time, adsorbate concentration, temperature, pH and adsorbent doses. The modified adsorbent was also characterized by X-ray diffraction(XRD)and Fourier transform infrared spectroscopy(FT-IR). HDTMAB was adsorbed in the interlayer of montmorillonite, which expanded the layer spacing of the modified montmorillonite. The modified montmorillonite exhibited higher quinclorac removal effi-ciency than the unmodified montmorillonite did. The experimental data was fitted very well with the pseudo-second-order kinetic model, in-dicating that chemisorption was the controlling step of the adsorption. The adsorption isotherm of quinclorac was in good agreement with Linear and Freundlich isotherm models. The adsorption capacity decreased from 1.86 mg·g-1 to 1.65 mg·g-1 with temperature increase from 25℃to 45℃at an initial concentration of 10.00 mg·L-1, suggesting that the adsorption was exothermic. Adsorption capacity of quinclorac on modified montmorillonite decreased with increased pH.