Collaborative Research: Dry-Wet Phase Inversion Pathway of Graphene Oxide (GO)-Based Mixed-Matrix Membranes for Mineral Ions Separation by Membrane Distillation

合作研究:基于氧化石墨烯(GO)的混合基质膜用于膜蒸馏矿物离子分离的干湿相转化途径

基本信息

  • 批准号:
    2002307
  • 负责人:
  • 金额:
    $ 30万
  • 依托单位:
  • 依托单位国家:
    美国
  • 项目类别:
    Continuing Grant
  • 财政年份:
    2020
  • 资助国家:
    美国
  • 起止时间:
    2020-08-01 至 2024-07-31
  • 项目状态:
    已结题

项目摘要

Increasing pollution and water scarcity have created the need to access and recover unconventional water sources. One such source is high-salinity produced water, which surfaces from underground during oil or gas production. Produced water has an excess concentration of minerals and does not meet the regulatory standards of acceptable quality for drinking water. However, by removing these undesirable constituents, the produced water can be reused for agricultural applications such as irrigation, livestock watering, and aquaculture. Therefore, identifying a process to desalinate produced water is of great societal importance. Reverse osmosis is a pressure-driven membrane process used to desalinate water containing relatively low mineral concentrations, such as groundwater. The mineral concentrations of produced water are sufficiently high that reverse osmosis is unsuitable for desalination. Membrane distillation is a promising alternative technology capable of separating minerals from high-salinity water due to its unique thermal-membrane characteristics. Graphene oxide-based membranes, with their efficient antifouling properties, are expected to enhance the membrane distillation process. Graphene oxide-based membranes are fabricated using a state-of-the-art method called phase inversion. Phase inversion produces these membranes by integrating graphene oxide directly into the polymeric materials. This project sets out to develop a detailed fundamental and mechanistic understanding of the role that graphene oxide plays in a novel dry-wet phase inversion synthesis to produce membranes for membrane distillation. This project will also combine research and education activities to train a new generation of experts in the versatile area of membrane technology, particularly as applied to water treatment.Membrane technology for water desalination and treatment of produced water has the potential to fundamentally alter the way society views water reuse. Augmenting water treatment capacity will allow rural, arid, and isolated regions with limited access to water, to have portable and reliable membrane systems for treating water. Advancing promising membrane separation processes for desalination, such as membrane distillation, requires access to fundamental knowledge of functional materials and structure-property relationship to engineer effective membranes. Membrane distillation is an energy-efficient alternative to multi-stage flash and multi-effect distillation processes and can be configured to concentrate brines. However, application of membrane distillation at scale is limited by the lack of suitable membranes exhibiting high permeate flux, water recovery, and resistance to scaling. The goal of this project is to establish and understand the dry-wet phase inversion membrane development approach to overcome these limitations in utility for produced water purification. Graphene oxide is a versatile anti-fouling nanomaterial that will be used in the synthesis of mixed-matrix membranes with properties specific to application in membrane distillation. Three research objectives are defined to provide fundamental insights into the dry-wet phase inversion process. In the first objective, the investigators will establish the role of graphene oxide sheet pH on pore formation and hydrophobic properties and determine the mechanism of dispersion of graphene oxide. The second objective examines ion retention on dry-wet phase inversion graphene oxide-based membranes during membrane distillation. And the third objective focuses on characterizing of the chemical, thermal, and mechanical stability of the dry-wet phase inversion graphene oxide-based membranes. Together, this knowledge will form a foundation for advancing membrane distillation for high-salinity water purification.This award reflects NSF's statutory mission and has been deemed worthy of support through evaluation using the Foundation's intellectual merit and broader impacts review criteria.
日益严重的污染和水资源短缺造成了获取和回收非常规水源的需求。一种这样的来源是高盐度采出水,其在石油或天然气生产期间从地下浮出水面。采出水含有过量的矿物质,不符合饮用水可接受质量的监管标准。然而,通过去除这些不需要的成分,产出的水可以重新用于农业应用,如灌溉、牲畜饮水和水产养殖。因此,确定淡化采出水的方法具有重大的社会意义。反渗透是一种压力驱动的膜过程,用于淡化含有相对低矿物质浓度的水,如地下水。采出水的矿物质浓度足够高,反渗透不适合脱盐。膜蒸馏由于其独特的热膜特性,是一种很有前途的从高盐度水中分离矿物的替代技术。基于氧化石墨烯的膜,具有其有效的渗透性能,有望增强膜蒸馏过程。氧化石墨烯基膜是使用称为相转化的最先进方法制造的。相转化通过将氧化石墨烯直接整合到聚合物材料中来产生这些膜。该项目旨在对氧化石墨烯在新型干-湿相转化合成中的作用进行详细的基础和机理理解,以生产用于膜蒸馏的膜。该项目还将联合收割机的研究和教育活动相结合,以培养新一代的膜技术多功能领域的专家,特别是在水处理方面,用于水脱盐和采出水处理的膜技术有可能从根本上改变社会对水再利用的看法。提高水处理能力将使农村、干旱和偏远地区能够获得有限的水资源,从而拥有便携和可靠的水处理膜系统。推进有前途的海水淡化膜分离工艺(例如膜蒸馏)需要获得功能材料和结构-性能关系的基础知识来设计有效的膜。膜蒸馏是多级闪蒸和多效蒸馏工艺的一种节能替代方法,可用于浓缩盐水。然而,膜蒸馏在规模上的应用受到缺乏表现出高渗透通量、水回收率和抗结垢性的合适膜的限制。本项目的目标是建立和了解干湿相转化膜的开发方法,以克服这些限制,在公用事业的生产水净化。氧化石墨烯是一种多用途的抗污染纳米材料,将用于合成具有特定于膜蒸馏应用的特性的混合基质膜。三个研究目标被定义为干-湿相转化过程提供基本的见解。在第一个目标中,研究人员将确定氧化石墨烯片pH值对孔形成和疏水特性的作用,并确定氧化石墨烯分散的机制。第二个目的是考察膜蒸馏过程中干-湿相转化氧化石墨烯基膜上的离子保留。第三个目标是表征干-湿相转化氧化石墨烯基膜的化学、热和机械稳定性。这一奖项反映了NSF的法定使命,并通过使用基金会的知识价值和更广泛的影响审查标准进行评估,被认为值得支持。

项目成果

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Lucy Mar Camacho其他文献

Lucy Mar Camacho的其他文献

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{{ truncateString('Lucy Mar Camacho', 18)}}的其他基金

2024 Membranes: Materials and Processes Gordon Research Conference and Seminar
2024年膜:材料与工艺戈登研究会议及研讨会
  • 批准号:
    2332606
  • 财政年份:
    2024
  • 资助金额:
    $ 30万
  • 项目类别:
    Standard Grant
EAGER-SUSCHEM: Rare Earth Elements Recovery from Geothermal Waters Using Novel Electrodialysis Metathesis Process
EAGER-SUSCHEM:利用新型电渗析复分解工艺从地热水中回收稀土元素
  • 批准号:
    1632146
  • 财政年份:
    2017
  • 资助金额:
    $ 30万
  • 项目类别:
    Standard Grant
MRI: Acquisition of a Liquid Chromatograph-Inductively-Coupled Plasma-Mass Spectroscopic Instrument (LC-ICP-MS) for Speciation of Metal Ions in the Environment
MRI:使用液相色谱-电感耦合等离子体质谱仪 (LC-ICP-MS) 对环境中的金属离子形态进行分析
  • 批准号:
    1626157
  • 财政年份:
    2016
  • 资助金额:
    $ 30万
  • 项目类别:
    Standard Grant

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