CAJ | 학술논문

通过HNO3、NaOH氧化和负载食品级单宁酸等改性技术制备改性PAC，考察改性PAC对低温（2℃）水中低质量浓度Cr（VI）及Cr（Ⅲ）离子（0．500 mg／L）的去除性能，选择制备高效吸附低质量浓度Cr（ VI）的PAC表面改性技术．试验结果表明，表面负载食品级单宁酸改性（ TA－OC）为最佳改性方法，其比表面积、总孔容积和表面极性大小最佳，正交试验确定的TA－OC的最佳制备条件为：单宁酸质量浓度为15 mg／L，pH值为4，温度为40℃，时间为9 h．
통과HNO3、NaOH양화화부재식품급단저산등개성기술제비개성PAC，고찰개성PAC대저온（2℃）수중저질량농도Cr（VI）급Cr（Ⅲ）리자（0．500 mg／L）적거제성능，선택제비고효흡부저질량농도Cr（ VI）적PAC표면개성기술．시험결과표명，표면부재식품급단저산개성（ TA－OC）위최가개성방법，기비표면적、총공용적화표면겁성대소최가，정교시험학정적TA－OC적최가제비조건위：단저산질량농도위15 mg／L，pH치위4，온도위40℃，시간위9 h．
The modification methods used in this work were HNO3/NaOH oxidation modifica-tion and immobilization of food-grade tannic acid.Through the analysis of the adsorption properties of modified carbons for the low concentration Cr( VI)/Cr(Ⅲ) ion(0.500 mg/L) from low temperature water (2℃) , the optimal modification method was confirmed.Test re-sults showed that the carbon immobilized by tannic acid ( TA-OC) has the best adsorption properties and it is chosen as the optimal modified carbon.TA-OC has the best specific surface area, total pore volume and surface polarity.The variance analysis of orthogonal test indicated that the optimal preparation conditions of TA-OC were determined as food-grade tannic concentration of 15 mg/L, pH value of 4.0, temperature of 40 ℃ and the modified time of 9 h.