| 项目编号: | 1707069
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| 项目名称: | WERF: Determining the fate and major removal mechanisms of microplastics in water and resource recovery facilities |
| 作者: | Belinda Sturm
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| 承担单位: | University of Kansas Center for Research Inc
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| 批准年: | 2017
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| 开始日期: | 2017-08-01
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| 结束日期: | 2020-07-31
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| 资助金额: | 304892
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| 资助来源: | US-NSF
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| 项目类别: | Standard Grant
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| 国家: | US
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| 语种: | 英语
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| 特色学科分类: | Engineering - Chemical, Bioengineering, Environmental, and Transport Systems
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| 英文关键词: | microplastic
; fate
; microplastic adsorption
; microplastic removal
; microplastic contamination
; microplastic-associated microorganism
; low density microplastic particle
; wrrf
; plastic microplastic
; microplastic load
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| 英文摘要: | Proposal: 1707069
PI: Belinda Sturm
The focus of this project is the fate of microplastics (plastics < 5mm) in the liquid and biosolids discharged from water resource and recovery facilities (WRRFs). Microplastics are typically entrained within activated sludge and ultimately released to the environment through biosolids. The detrimental effects of plastics on marine vertebrates is well-documented and a major environmental concern. In this project the transport pathways for plastics will be identified. The results of this study will help reduce harmful marine ecosystem impacts. The PIs will engage municipalities through a full-scale sampling campaign and will disseminate the data in a web-based database that is publically accessible. They will continue to collaborate with high school teachers to refine teaching modules dealing with topics focused on microplastics and emerging contaminants.
Microplastics are likely to be removed when they are adsorbed or entrained within the activated sludge floc structure. The main hypothesis is that the sludge structure and extracellular polymeric substances (EPS) content are controlling variables to microplastic removal. In particular, the assumption is that microbial aggregates with high surface areas and high EPS content can capture more microplastics. To test this hypothesis the PIs will conduct a survey of select WRRFs with different primary and secondary treatment processes. To further quantify microplastics capture efficiencies, the PIs will determine the effect of EPS on microplastic adsorption and retention efficiency within lab-scale and pilot-scale reactors and compare conventional and aerobic granular sludge processes for microplastic adsorption. The activated sludge process, and particularly gravity sedimentation, was not designed to remove low density microplastic particles. Microplastics are likely to be removed when they are adsorbed or entrained within the activated sludge floc structure. As microplastic loads to WRRFs increase, it is important to study the effect of niche separation of microplastic-associated microorganisms on activated sludge process performance. One outcome of the research will be a better understanding the fate of microplastics in WRRFs. Results of this project will provide a framework for comprehensive management of microplastics contamination in WRRFs. |
| 资源类型: | 项目
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| 标识符: | http://119.78.100.158/handle/2HF3EXSE/89684
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| Appears in Collections: | 全球变化的国际研究计划
科学计划与规划
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| Recommended Citation: | |
Belinda Sturm. WERF: Determining the fate and major removal mechanisms of microplastics in water and resource recovery facilities. 2017-01-01.
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