CAJ | 학술논문

采用溶胶沉淀结合超声分散处理的方法,制备平均粒径为70 nm,比表面积为212 m2·g~(-1)的纳米级水合氧化铈(Nano-HCO)吸附剂.在pH值为4～10,初始As(Ⅲ)质量浓度为10 mg·L~(-1),吸附剂投加量为1.0 g·L~(-1)的反应条件下,可在2 h内将溶液中As(Ⅲ)质量浓度降低到0.01 mg·L~(-1)以下.Nano-HCO吸附剂对砷的吸附等温线服从Langmuir方程,对应不同pH值,其对As(Ⅲ)的吸附容量较未经超声分散处理的水合氧化铈提高29%～141%,且水温的升高有助于增加As(Ⅲ)的吸附程度.
채용용효침정결합초성분산처리적방법,제비평균립경위70 nm,비표면적위212 m2·g~(-1)적납미급수합양화시(Nano-HCO)흡부제.재pH치위4～10,초시As(Ⅲ)질량농도위10 mg·L~(-1),흡부제투가량위1.0 g·L~(-1)적반응조건하,가재2 h내장용액중As(Ⅲ)질량농도강저도0.01 mg·L~(-1)이하.Nano-HCO흡부제대신적흡부등온선복종Langmuir방정,대응불동pH치,기대As(Ⅲ)적흡부용량교미경초성분산처리적수합양화시제고29%～141%,차수온적승고유조우증가As(Ⅲ)적흡부정도.
Nano-sized hydrous ceric oxide (Nano-HCO) with an average diameter size of 70 ran and specific surface area 212 m~2·g~(-1) were prepared using sol-precipitation method in conjunction with ultrasonic dispersion.At an initial As(Ⅲ ) concentration of 10 mg·L~(-1),solution pH range 4~10,adsorbent dose of 1.0 g·L~(-1),a final concentration of As( Ⅲ ) could be decreased below 0.01 mg·L~(-1),within 2 h.The isotherms fit well in the Langmuir model of adsorption,and with the studied pH conditions,the adsorption capacity of As(Ⅲ) on Nano-HCO was increased by 29% to 141% compared with the HCO samples prepared without ultrasonic dispersion treatment.The extent of As(Ⅲ) adsorption was enhanced by increasing ambient temperature.