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 : Kim Ford Hayes (검색결과 1 건)
- 무료
- 기관 내 무료
- 유료
-
정훈영,Nonso Gbemudu,최하정,김수경,진성욱,Yongli Gao,Kai Sun,Kim Ford Hayes 한국지질과학협의회 2020 Geosciences Journal Vol.24 No.6
Mackinawite (FeS), an effective reagent for treating inorganic and organic contaminants, is generally produced as nanoparticles. Since these nanoparticles tend to aggregate to decrease permeability in aquifers and even cause pore clogging, it is often necessary to modify them into such forms to be adequate for preamble reactive barrier (PRB) applications. To this end, this study aimed to produce granular FeS (GFS) from its nanoparticulate precursor using a freeze and thaw method, by which the nanoparticle suspensions were subjected to freezing and then thawing. According to X-ray diffraction, the crystallinity of the resultant GFS was not changed noticeably. By an environmental scanning electron microscope (ESEM), the size of the resultant GFS particles was affected by the type and concentration of electrolytes (e.g., Na2SO4, NaCl, and CaCl2). While the particle size generally increased in the order of Na2SO4 << NaCl ≈ CaCl2, it decreased with the electrolyte concentration. The ESEM images processed with the proposed approach here allowed us to determine the macroporosity of GFS. The GFS prepared using 100 mM Na2SO4 solution had the largest population of the pores with ~0.2 μm in diameter. By batch experiments, the As(III) sorption capacity of GFS at neutral to basic pH was comparable to that of the nanoparticulate precursor, suggesting the PRB applicability of GFS to remedy As(III)-contaminated groundwater under anoxic conditions.
연관 검색어 추천
이 검색어로 많이 본 자료
활용도 높은 자료
