Global S&T Development Trend Analysis Platform of Resources and Environment
DOI | 10.1002/2017WR020570 |
Multiscale Investigation on Biofilm Distribution and Its Impact on Macroscopic Biogeochemical Reaction Rates | |
Yan, Zhifeng1,2; Liu, Chongxuan2,3; Liu, Yuanyuan2,4; Bailey, Vanessa L.2 | |
2017-11-01 | |
发表期刊 | WATER RESOURCES RESEARCH |
ISSN | 0043-1397 |
EISSN | 1944-7973 |
出版年 | 2017 |
卷号 | 53期号:11 |
文章类型 | Article |
语种 | 英语 |
国家 | Peoples R China; USA |
英文摘要 | Biofilms are critical locations for biogeochemical reactions in the subsurface environment. The occurrence and distribution of biofilms at microscale as well as their impacts on macroscopic biogeochemical reaction rates are still poorly understood. This paper investigated the formation and distributions of biofilms in heterogeneous sediments using multiscale models and evaluated the effects of biofilm heterogeneity on local and macroscopic biogeochemical reaction rates. Sediment pore structures derived from X-ray computed tomography were used to simulate the microscale flow dynamics and biofilm distribution in the sediment column. The response of biofilm formation and distribution to the variations in hydraulic and chemical properties was first examined. One representative biofilm distribution was then utilized to evaluate its effects on macroscopic reaction rates using nitrate reduction as an example. The results revealed that microorganisms primarily grew on the surfaces of grains and aggregates near preferential flow paths where both electron donor and acceptor were readily accessible, leading to the heterogeneous distribution of biofilms in the sediments. The heterogeneous biofilm distribution decreased the macroscopic rate of biogeochemical reactions as compared with those in homogeneous cases. Operationally considering the heterogeneous biofilm distribution in macroscopic reactive transport models such as using dual porosity domain concept can significantly improve the prediction of biogeochemical reaction rates. Overall, this study provided important insights into the biofilm formation and distribution in soils and sediments as well as their impacts on the macroscopic manifestation of reaction rates. |
英文关键词 | multiscale biofilm heterogeneity biogeochemical reaction scaling |
领域 | 资源环境 |
收录类别 | SCI-E |
WOS记录号 | WOS:000418736700004 |
WOS关键词 | DISSOLVED ORGANIC-CARBON ; PREFERENTIAL FLOW PATHS ; PORE-SCALE SIMULATION ; POROUS-MEDIA ; ARTIFICIAL RECHARGE ; MICROBIAL BIOFILMS ; CONTINUUM-SCALE ; BIOMASS GROWTH ; HOT MOMENTS ; SOIL |
WOS类目 | Environmental Sciences ; Limnology ; Water Resources |
WOS研究方向 | Environmental Sciences & Ecology ; Marine & Freshwater Biology ; Water Resources |
引用统计 | |
文献类型 | 期刊论文 |
条目标识符 | http://119.78.100.173/C666/handle/2XK7JSWQ/21339 |
专题 | 资源环境科学 |
作者单位 | 1.Tianjin Univ, Inst Surface Earth Syst Sci, Tianjin, Peoples R China; 2.Pacific Northwest Natl Lab, Richland, WA USA; 3.Southern Univ Sci & Technol, Sch Environm Sci & Engn, Shenzhen, Peoples R China; 4.Nanjing Univ, Sch Earth Sci & Engn, Nanjing, Jiangsu, Peoples R China |
推荐引用方式 GB/T 7714 | Yan, Zhifeng,Liu, Chongxuan,Liu, Yuanyuan,et al. Multiscale Investigation on Biofilm Distribution and Its Impact on Macroscopic Biogeochemical Reaction Rates[J]. WATER RESOURCES RESEARCH,2017,53(11). |
APA | Yan, Zhifeng,Liu, Chongxuan,Liu, Yuanyuan,&Bailey, Vanessa L..(2017).Multiscale Investigation on Biofilm Distribution and Its Impact on Macroscopic Biogeochemical Reaction Rates.WATER RESOURCES RESEARCH,53(11). |
MLA | Yan, Zhifeng,et al."Multiscale Investigation on Biofilm Distribution and Its Impact on Macroscopic Biogeochemical Reaction Rates".WATER RESOURCES RESEARCH 53.11(2017). |
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