An innovative solar energy-powered floating media bed reactor for nutrient removal (II): material characterization
學年 105
學期 1
出版（發表）日期 2016-10-01
作品名稱 An innovative solar energy-powered floating media bed reactor for nutrient removal (II): material characterization
作品名稱（其他語言）
著者 Kuen-Song Lin, Ni-Bin Chang, Nickolas Hartshorn, Martin P Wanielista, Chao-Lung Chiang
單位
出版者
著錄名稱、卷期、頁數 Journal of Cleaner Production 133,p. 1128-1135
摘要 To enhance the removal efficiencies of total phosphorus (TP) and total nitrogen (TN), a Floating Media Bed Reactor (FMBR) was developed as a supplementary treatment unit for stormwater wet detention ponds. The FMBR was filled with an engineered mixture of media for the removal of target nutrient species. These materials aid in the physiochemical sorption and precipitation of orthophosphates as well as in the biological transformation of ammonia, nitrates and nitrites. The microstructure and morphology of the green media has not been well studied in recent years, however, because this is a new topic of interest. Therefore, the main objective of this study was to characterize the fine structures and morphology of the green media utilized in the FMBR. Experimentally, field-emission scanning electron microscopy (FE-SEM) micrographs reveal biofilms on the surface of porous media that likely enhanced the removal efficiency of TN and TP during field operation. From the X-ray powder diffraction (XRD) patterns, hexagonal-typed SiO2 and monoclinic-typed Al2O3 are characteristics of average crystallite sizes of 200–250 nm for fresh and used media samples. The media possess numerous pores or cavities where nutrients can easily be adsorbed. Moreover, the Brunauer–Emmett–Teller (BET) specific surface area (pore volume) decreased from 33 to 25 m2 g−1 (0.16–0.10 cm3 g−1) after field testing the FMBR. These results suggest that voids in post-treatment media samples were filled or occupied with nutrients and particulates adsorbed onto the media surface or biofilms, thus leading to the reduction of BET specific surface area and pore volume. The post-treatment adsorbent media had a slightly stronger stretching vibration of Psingle bondOsingle bondC and Psingle bondOsingle bondP species around 600 and 800 cm−1 respectively, found in the Fourier transform infrared (FTIR) spectra, which may be explained by more nutrients having been adsorbed on the surface or biofilms of the porous structures.
關鍵字
語言 en
ISSN
期刊性質 國外
收錄於 SCI SSCI Scopus
產學合作
通訊作者 Ni-Bin Chang
審稿制度 是
國別 NLD
公開徵稿
出版型式 ,電子版
相關連結

機構典藏連結 ( http://tkuir.lib.tku.edu.tw:8080/dspace/handle/987654321/127463 )

SDGS 永續城市與社區,水下生命,夥伴關係,潔淨水與衛生,產業創新與基礎設施