Jadhav Arvind H, Mai Xuan Thang, Appiah-Ntiamoah Richard, Lee Hanyeong, Momade Francis W Y, Seo Jeong Gil, Kim Hern
J Nanosci Nanotechnol. 2015 Oct;15(10):7980-7. doi: 10.1166/jnn.2015.11269.
Palmitoyl grafted modified cellulose were prepared by simple chemical grafting method and applied as nano adsorbent for removal of pyrene from aqueous solution. The chemical properties and morphology of prepared nano-adsorbent were characterized by FT-IR, XRD, SEM, EDX, TGA, and contact angle. Results showed that palmitoyl successfully grafted on the surface of cellulose and possess effective organic functional groups for the adsorption of pyrene from aqueous solution. The adsorption performance of modified cellulose was significantly improved toward pyrene in aqueous solution. It is worthy to note that 0.25 g of palmitoyl grafted cellulose (PMC) removed 92% pyrene compared to unmodified cellulose which adsorbed 36% pyrene from 1.65 ppm aqueous solution of pyrene in very short contact time at room temperature. Results showed that, presence of various organic functional groups from palmitoyl chains grafted on cellulose backbone affected to pyrene removal. After completion of adsorption phenomenon nano-adsorbent can be removed by simply filtration process and reused several times. The adsorption capacity was studied under different experimental conditions and their effects on adsorption such as temperature, pH, and contact time were also studied. The kinetics and isotherms of material were also determined.
通过简单的化学接枝方法制备了棕榈酰接枝改性纤维素，并将其用作纳米吸附剂以从水溶液中去除芘。通过傅里叶变换红外光谱（FT-IR）、X射线衍射（XRD）、扫描电子显微镜（SEM）、能谱仪（EDX）、热重分析（TGA）和接触角对制备的纳米吸附剂的化学性质和形态进行了表征。结果表明，棕榈酰成功接枝到纤维素表面，并具有有效的有机官能团用于从水溶液中吸附芘。改性纤维素对水溶液中芘的吸附性能显著提高。值得注意的是，在室温下极短的接触时间内，0.25 g棕榈酰接枝纤维素（PMC）从1.65 ppm的芘水溶液中去除了92%的芘，而未改性纤维素仅吸附了36%的芘。结果表明，接枝在纤维素主链上的棕榈酰链上存在的各种有机官能团对芘的去除有影响。吸附现象完成后，纳米吸附剂可通过简单的过滤过程去除并重复使用多次。研究了不同实验条件下的吸附容量，并研究了温度、pH值和接触时间等对吸附的影响。还测定了该材料的动力学和等温线。
