CAJ | 학술논문

利用浸渍法对纳米TiO_2进行表面改性,制备出改性纳米TiO_2,并用扫描电镜(SEM)对其进行了表征.以火焰原子吸收光谱法(FAAS)探讨了改性纳米TiO_2在静态吸附条件下对Ni(Ⅱ)的吸附性能,影响吸附和解脱的主要因素及Ni(Ⅱ)的吸附等温线,常见共存离子对Ni(Ⅱ)测定的影响,并做了再生实验.结果表明:在pH 8.0,振荡5 min,静置12 h条件下,0.1000 g改性纳米TiO_2能定量吸附Ni(Ⅱ);10 mL 4 mol/L硝酸作为解脱剂可使Ni(Ⅱ)定量解脱;改性纳米TiO_2对Ni(Ⅱ)的吸附性能良好.该吸附剂已用于环境水样中Ni(Ⅱ)的测定.
이용침지법대납미TiO_2진행표면개성,제비출개성납미TiO_2,병용소묘전경(SEM)대기진행료표정.이화염원자흡수광보법(FAAS)탐토료개성납미TiO_2재정태흡부조건하대Ni(Ⅱ)적흡부성능,영향흡부화해탈적주요인소급Ni(Ⅱ)적흡부등온선,상견공존리자대Ni(Ⅱ)측정적영향,병주료재생실험.결과표명:재pH 8.0,진탕5 min,정치12 h조건하,0.1000 g개성납미TiO_2능정량흡부Ni(Ⅱ);10 mL 4 mol/L초산작위해탈제가사Ni(Ⅱ)정량해탈;개성납미TiO_2대Ni(Ⅱ)적흡부성능량호.해흡부제이용우배경수양중Ni(Ⅱ)적측정.
The modified nanometer-sized TiO_2 was prepared by using immersion method, and characterized by scanning electron microscope(SEM).Problems including the adsorption properties of modified nanometer-sized TiO_2 to Ni(Ⅱ)under static adsorption conditions, main factors influencing ad-sorption and desorption, adsorption isotherms of Ni(Ⅱ)and the effect of common coexisting ions on the determination of Ni(Ⅱ)were investigated by flame atomic absorption spectrometry(FAAS).Moreover, regeneration test was conducted.The results showed that when sample solution containing the sorbent was vibrated for 5 min and placed for 12 h at pH 8.0, Ni(Ⅱ)could be adsorbed quantitively by 0.1000 g of modified nanometer-sized TiO_2.Ni(Ⅱ)adsorbed onto the sorbent could be desorbed with 10 mL of 4.0 mol/L HNO_3.The modified nanometer-sized TiO_2 exhibited excellent adsorption properties to Ni(Ⅱ),and it has been applied to the determination of Ni(Ⅱ)in environmental water samples.