http://chineseinput.net/에서 pinyin(병음)방식으로 중국어를 변환할 수 있습니다.
변환된 중국어를 복사하여 사용하시면 됩니다.
- 中文 을 입력하시려면 zhongwen을 입력하시고 space를누르시면됩니다.
- 北京 을 입력하시려면 beijing을 입력하시고 space를 누르시면 됩니다.
RISS 인기검색어
- 검색키워드
- 저자 : Songsheng Lu (검색결과 1 건)
- 무료
- 기관 내 무료
- 유료
-
Wenbao Jia,Songsheng Lu 한국화학공학회 2014 Korean Journal of Chemical Engineering Vol.31 No.7
Few-layered graphene oxides (GOs) were successfully synthesized from graphite using Hummers’ method. The synthesized GOs were characterized in detail by SEM, AFM, XRD, and FTIR spectroscopy. The prepared GOswere used as adsorbents to preconcentrate Pb(II) ions from large volumes of aqueous solutions. The effects of pH, ionicstrength and temperature on the removal of Pb(II) ions from solution to GOs were investigated. The sorption of Pb(II)on GOs was dependent on pH values and independent of ionic strength, which suggested that Pb(II) sorption on GOswas mainly dominated by strong inner-sphere surface complexation. The maximum adsorption capacities (Csmax) ofPb(II) on GOs were calculated to be 344 mg/g at 293 K, 487 mg/g at 308 K, and 758mg/g at 333 K, respectively. TheCsmax values are the highest sorption capacities of today’s materials for the sorption of Pb(II) ions from aqueous solutions. The thermodynamic parameters were calculated from the temperature-dependent sorption isotherms, and the resultsindicated that Pb(II) sorption on GOs was spontaneous and endothermic. The results suggested that the GOs were promisingmaterials for the preconcentration of Pb(II) and other kinds of heavy metal ions from aqueous solutions in environmentalpollution cleanup in real work.
연관 검색어 추천
이 검색어로 많이 본 자료
활용도 높은 자료
