CAJ | 학술논문

　　以壳聚糖（ CTS）和丙烯酸（ AA）为原料，采用过硫酸铵引发接枝共聚反应，制备了壳聚糖与丙烯酸的接枝共聚物（ CTS-g-AA），考察了丙烯酸的用量、引发剂质量、反应温度和反应时间对接枝共聚反应的影响。用红外光谱仪对产物结构进行了表征，并研究了接枝共聚物对Cr3＋、Pb2＋的吸附性能。实验结果表明，接枝聚合反应的最佳反应条件：丙烯酸用量3.5 mL，引发剂质量0.2 g，反应温度65℃，反应时间4 h。红外光谱显示其有明显的-COOH峰，即壳聚糖成功接枝了丙烯酸；接枝共聚物和壳聚糖对Cr3＋的吸附容量分别为144.7、116.4 mg/g，对Pb2＋的吸附容量分别为38.1、18.2 mg/g，接枝共聚物对两离子都有吸附作用，且明显好于壳聚糖，其中对Cr3＋的吸附远远强于对Pb2＋的吸附，两者最大吸附容量相差约4倍；溶液的pH值对吸附有明显的影响，可通过控制溶液pH值对金属离子进行吸附或脱附处理，故共聚物可应用于废水中金属离子回收处理。
　　이각취당（ CTS）화병희산（ AA）위원료，채용과류산안인발접지공취반응，제비료각취당여병희산적접지공취물（ CTS-g-AA），고찰료병희산적용량、인발제질량、반응온도화반응시간대접지공취반응적영향。용홍외광보의대산물결구진행료표정，병연구료접지공취물대Cr3＋、Pb2＋적흡부성능。실험결과표명，접지취합반응적최가반응조건：병희산용량3.5 mL，인발제질량0.2 g，반응온도65℃，반응시간4 h。홍외광보현시기유명현적-COOH봉，즉각취당성공접지료병희산；접지공취물화각취당대Cr3＋적흡부용량분별위144.7、116.4 mg/g，대Pb2＋적흡부용량분별위38.1、18.2 mg/g，접지공취물대량리자도유흡부작용，차명현호우각취당，기중대Cr3＋적흡부원원강우대Pb2＋적흡부，량자최대흡부용량상차약4배；용액적pH치대흡부유명현적영향，가통과공제용액pH치대금속리자진행흡부혹탈부처리，고공취물가응용우폐수중금속리자회수처리。
Graft copolymer ( CTS-g-AA ) was prepared by grafting copolymerization of chitosan ( CTS) with acrylic acid ( AA) using ammonium persulfate as initiator .The effects of the amount of AA, initiator, reaction temperature and reaction time on the graft copolymerization were investiga-ted, respectively.The structure of graft copolymer was characterized by FT-IR and adsorption be-haviors of graft copolymer on Cr 3+and Pb2+were researched .The results show that the optimal reac-tion conditions of graft copolymerization were 3.5 mL of AA, 0.2 g of (NH4)2S2O8, reaction tem-perature at 65℃and reaction time in 4 h, respectively.The-COOH peaks of graft copolymer were visibly revealed on infrared spectra , showing that chitosan was successfully grafted on to the acrylic acid.The adsorption capacities for Cr 3+ on graft copolymer and chitosan were 144.7 mg/g and 116.4 mg/g and for Pb2+were 38.1 mg/g and 18.2 mg/g, respectively.The graft copolymer has satisfactory adsorption effect for Cr 3+and Pb2+and better than that of chitosan .Among them, it had stronger adsorption for Cr 3+with the maximum adsorption capacity for Cr3+being about four times as high as for Pb 2+.The adsorption capacity was affected by the pH value of solution .Thus it was pos-sible to recycle the metal ions of waste water by adjusting the pH value to control the absorption and desorption of the melal ions