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 : Raphael Akesseh (검색결과 1 건)
- 무료
- 기관 내 무료
- 유료
-
Laboratory Assessment of Impact of Copper and Lead on Solidified/Stabilized Material
Abraham C. F Chiu,Raphael Akesseh,Gifty Amokwaw 대한토목학회 2018 KSCE JOURNAL OF CIVIL ENGINEERING Vol.22 No.10
This study focused on the impact of copper and lead concentration on the permeability of solidified/stabilized soil and assessed the leachability of heavy metals after stabilization. An artificial soil material was prepared using kaolin, sand, and silts in the ratio of 2:1:1. Samples were spiked with copper and lead in the form of Cu(NO3)·3H2O and Pb(NO3)2 and stabilized with cement content of 100 kg/m3 and 300 kg/m³. The samples were cured for 7 and 28 days. With the use of triaxial cell apparatus, permeability was measured after each curing period. The sample spiked with copper and lead showed an increase in permeability at the end of 28 days of curing in comparison with samples without heavy metals. Microstructure analysis also showed that copper had a greater impact on the pore size distribution in comparison to lead. Batch leaching test results also showed that under neutral conditions, both lead and copper were stable for the cement contents applied for treatment. Under acidic leaching conditions, more copper leached compared to lead. Amount of binder content was also an important factor in the solidification/stabilization process. Geochemical modeling of the pore solution using Visual Minteq showed that both copper and lead dominantly existed as hydroxide species, which facilitated adsorption. Precipitation of some of their solids was also important for immobilization.
연관 검색어 추천
이 검색어로 많이 본 자료
활용도 높은 자료
