Earticle

현재 위치 Home

한국퇴적환경준설학회 학술대회 초록집(구 한국환경준설학회 학술대회 논문집)

간행물 정보
  • 자료유형
    학술대회
  • 발행기관
    한국퇴적환경준설학회(구 한국환경준설학회) [Korean Society of Sediment Environment and Dredging]
  • 간기
    반년간
  • 수록기간
    2012 ~ 2026
  • 주제분류
    자연과학 > 해양학
  • 십진분류
    KDC 539 DDC 628
2022년 한국환경준설학회 춘계 학술대회 초록집 (31건)
No

특별세션 I

특별세션 II

포스터 세션

25

A high performance porous biochar described as RH-NaOH was successfully synthesized by one step pyrolysis of rice husk with alkaline activation NaOH, and was employed to eliminate polycyclic aromatic hydrocarbons (PAHs) and phthalates (PAEs) from water and sediments. Benefiting from NaOH activation, the RH-NaOH possessed a porous structure and large specific surface area (750 m2/g). Except for Chrysene (Chry), Benzo(a)pyrene, and Benzo(g,h,i)perylene, the adsorption equilibrium was attained within 60 minutes for all target contaminated compounds. These slow adsorptions are attributed to the high hydrophobicity of heavier PAHs. Adsorption isotherms and kinetic models suggest the generation of an adsorbate multilayer adsorption. Different RH-NaOH dosages were amended to sediments to reduce the remain of PAHs and PAEs in sediment. At 2 wt% of RH-NaOH amended sediment, the total of PAHs and PAEs decreased by 30 % compared to the sediment without biochar.

27

In this study, we synthesize photocatalyst based on stainless steel plate and mesh by anodization method. The anodized stainless steel plate and mesh formed nanotubes on their surface. The major components Fe and Cr are transform to Fe2O3 and Cr2O3 during anodization which are favorable as a photocatalyst by z-scheme effect. The first step of anodization is to prepare 100 mm x 40 mm of stainless steel plate and mesh vertically as anode and platinum as cathode electrode with distance of 5cm. 5 V/V% of perchloric acid based on ethylene glycol used for electrolyte, start anodize with 40V, 20min (5min for mesh), less than 6℃ with 150 rpm of magnetic stirred. The nanotubes on substrates are gradually increase their surface area which are effective to degrade organic compounds. The degradation experiments were carried out with hydrogen peroxide under UV light irradiation (20W, 254nm). SEM, EDS, and XRD are visualized the characteristics of each substrates. Various organic compounds analyzed with HPLC, GC-MS, GC-FID, and UV-vis spectrometer.

 
1 2
페이지 저장