对甲苯磺酸掺杂聚吡咯/尼龙6纳米纤维膜作为碱性橙Ⅱ固相萃取介质的研究

P-Toluene Sulfonate and Polypyrrole Modified Nylon 6Nanofibers Mat for Solid Phase Extraction of Basic Orange Ⅱ

通过静电纺丝法和氧化聚合法制备了对甲苯磺酸根离子掺杂的聚吡咯/尼龙6纳米纤维（PTS-PPy/PA6 NFs）膜,通过静态和动态吸附实验考察其对碱性橙Ⅱ吸附性能,探讨其作为固相萃取（Solid phase extraction,SPE）介质的可行性。结果表明,在25℃,溶液p H=9时,PTS-PPy/PA6 NFs膜对碱性橙Ⅱ的静态吸附容量可达372.2 mg/g,吸附动力学和吸附等温线分别符合准二级动力学模型和Freundlich模型;吸附热力学结果表明,吸附是一个自发进行的吸热过程;在最佳动态吸附条件下,0.1μg/m L碱性橙Ⅱ样品溶液以3.0 m L/min的流速通过时,仅2.5 mg PTS-PPy/PA6 NFs膜就能实现高效萃取,且能重复使用7次。依此建立了基于PTS-PPy/PA6 NFs膜的SPE法,结合高效液相色谱-二极管阵列检测（HPLC-DAD）印染废水中的碱性橙Ⅱ时,6批样品均被检出含有碱性橙Ⅱ,10 ng/m L加标水平的平均加标回收率为95.6%~119.7%,相对标准偏差（RSD）为4.9%~12.5%（n=3）。

A novel adsorbent P-toluene sulfonate and polypyrrole modified nylon 6 nanofibers（ PTS-PPy / PA6NFs） mat was prepared by electrospinning followed by in situ oxidative polymerization,and its adsorption properties for basic orangeⅡin aqueous solutions were studied by using static and dynamic adsorption method,to investigate its applicability as solid phase extraction（ SPE） sorbents for basic orange Ⅱ. The experiment results showed that the maximum static adsorption capacity of PTS-PPy / PA6 nanofibers mat for basic orangeⅡwas 372. 2 mg / g at 25℃ and solution p H = 9 condition. The adsorption process could be well fitted with the pseudo-second-order kinetic model and the adsorption equilibrium data was accorded with Freundlich isotherm model. Adsorption thermodynamic results showed that the adsorption was a spontaneous physical adsorption process. PTS-PPy / PA6 nanofibers mat was used as SPE adsorbent,and under the optimum conditions,it only needed 2. 5 mg of PTS-PPy / PA6 nanofibers mat to extract analyte with satisfactory recoveries and good reusability when 0. 1 mg / L sample solution passed through the nanofibers mat at 3. 0 m L / min. The new method by a combination of mat-based SPE with HPLC-DAD was further applied to the determination of basic orangeⅡin dyeing wastewater samples,and basic orangeⅡ was detected in all 6 samples. The recoveries at spiked level of 10 ng / m L of basic orangeⅡ were in the range of 95. 6%- 119. 7%,and the RSD ranged from4. 9% to 12. 5%（ n = 3）.