Degradation of perchlorate using Pd/Activated carbon with adsorption/catalysis bi-functional roles = 흡착/촉매 다기능 물질의 설계를 통한 퍼클로레이트 이온 제거 방법에 관한 연구

Cited 0 time in webofscience Cited 0 time in scopus
  • Hit : 514
  • Download : 0
Although perchlorate (ClO4-) has a detrimental effect on human health, there have been limited solutions for the permanent degradation of perchlorate due to its extraordinary stability. Here an integrated process com-bining a physical adsorption and a catalytic degradation by using Pd/activated carbon (Pd/AC) and Pd/N-doped activated carbon (Pd/N-AC) as an adsorption/catalysis bi-functional material was demonstrated. During the perchlorate adsorption from waste water, the porous structure of the carbon provides adsorption sites for perchlorate. Pd/N-AC exhibited 38 ~ 52 % higher adsorption capacities than Pd/AC both in the presence and absence of competing ions (NO3-, SO42- and HCO3-). This can be attributed to the more positive surface charge of Pd/N-AC as revealed by zeta potential measurement. After the carbon surface is saturated with perchlorate, the adsorbed perchlorate can be fully decomposed by the catalytic function of supported Pd catalysts within 2 h under flowing H2 at 503 K. The perchlorate adsorption/catalytic decomposition cycle can be repeated up to three times without the loss of perchlorate adsorption capacity. Because the carbon adsorbents can be regenerated by using H2 as a green reducing agent (producing only H2O), significant cost savings and a favorable environmental impact can be realized compared with the conventional perchlorate removal strategies.
Advisors
Choi, Min-Keeresearcher최민기
Description
한국과학기술원 : 생명화학공학과,
Publisher
한국과학기술원
Issue Date
2013
Identifier
515059/325007  / 020114327
Language
eng
Description

학위논문(석사) - 한국과학기술원 : 생명화학공학과, 2013.2, [ v, 31 p. ]

Keywords

Perchlorate; Catalytic reduction; activated carbon; 퍼클로레이트; 촉매적 환원; 활성탄; 수질 정화; water purification

URI
http://hdl.handle.net/10203/179974
Link
http://library.kaist.ac.kr/search/detail/view.do?bibCtrlNo=515059&flag=dissertation
Appears in Collection
CBE-Theses_Master(석사논문)
Files in This Item
There are no files associated with this item.

qr_code

  • mendeley

    citeulike


rss_1.0 rss_2.0 atom_1.0