CAREER: Impacts of Marine Algal Blooms on Disinfection Byproduct Formation in Seawater Desalination

职业：海洋藻类大量繁殖对海水淡化中消毒副产物形成的影响

• 批准号: 1652412
• 负责人: Ning Dai
• 金额: $ 50.35万
• 依托单位: SUNY at Buffalo
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 2017
• 资助国家: 美国
• 起止时间: 2017-03-01 至 2023-02-28
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=1652412&HistoricalAwards=false
• 关键词: CAREER; Impacts; Marine; Algal; Blooms

Title: CAREER: Impacts of Marine Algal Blooms on Disinfection By-Product Formation in Seawater DesalinationPI Name: Ning Dai Proposal Number: 1652412 Reverse osmosis (RO)-based seawater desalination is one of the most important technologies for meeting the growing global water demand. At the intake of RO desalination plants, disinfectants (e.g., chlorine) are often added to suppress fouling of the treatment units, especially RO membranes, by microorganisms. These disinfectants can react with marine organic matter to form harmful disinfection by-products (DBPs). Recently, marine algal blooms were shown to interrupt desalination operations by causing severe membrane fouling, as a result of the high concentration of algal organic matter (AOM) during algal blooms. While disinfectants are crucial for controlling fouling during algal blooms, the implications of high AOM concentrations on DBP formation in desalination have not been considered. In this project the PI will investigate the formation of DBPs from algae species relevant to marine algal blooms and will develop DBP mitigation strategies for desalination operations. Education activities will focus on promoting professional competencies of environmental engineering students at all degree levels and on broadening participation of underrepresented groups in science, technology, engineering, and mathematics (STEM). This project will focus on both the fundamentals of DBP formation from marine algae and the application of findings to desalination operations. The project will encompass four research objectives. First, the DBP formation potential of bloom-relevant marine algae species will be evaluated under conditions simulating disinfection in seawater desalination during algal blooms. Representative species will be selected based on their relevance to marine algal blooms along the US coasts. The algae culture and the extracted intra- and extra-cellular AOM will be subjected to a suite of disinfectants, chlorine, chloramine, chlorine dioxide, ozone, permanganate, and their combinations. Second, DBP formation will be evaluated for fresh AOM derived from different algae growth stages and aged AOM after biotic and abiotic transformation. Third, the mechanisms of DBP formation from marine algae cells and the important DBP precursors will be identified. The fundamental knowledge of DBP formation under desalination scenario will be the basis for designing DBP prevention strategies for desalination facilities. Lastly, the effects of AOM transformation upon disinfection on its membrane fouling potential will be characterized to suggest strategies to achieve a balance between membrane fouling control and DBP prevention. Analytical tools such as gas, liquid, and size exclusion chromatography, mass spectrometry, and spectrophotometry will be employed to monitor DBP formation and characterize AOM transformation. The integral educational activities will include graduate student training in research and mentoring, providing research experience for undergraduates, incorporating cooperative design project-based learning in graduate and undergraduate environmental engineering courses, and K-12 outreach focusing on high school and middle school teacher development.

标题：职业：海洋藻华对海水淡化中消毒副产品形成的影响 PI 名称：Ning Dai 提案编号：1652412 基于反渗透 (RO) 的海水淡化是满足全球不断增长的水需求的最重要技术之一。在 RO 海水淡化厂的入口处，通常添加消毒剂（例如氯）以抑制微生物对处理装置（尤其是 RO 膜）的污染。这些消毒剂可以与海洋有机物发生反应，形成有害的消毒副产物（DBP）。最近，由于藻华期间藻类有机物（AOM）浓度高，海洋藻华导致严重的膜污染，从而中断海水淡化作业。虽然消毒剂对于控制藻华期间的污染至关重要，但高 AOM 浓度对海水淡化中 DBP 形成的影响尚未被考虑。在该项目中，项目负责人将调查与海洋藻​​华相关的藻类物种中 DBP 的形成，并为海水淡化作业制定 DBP 缓解策略。教育活动将侧重于提高各个学位级别的环境工程学生的专业能力，并扩大科学、技术、工程和数学 (STEM) 领域代表性不足群体的参与。该项目将重点研究从海藻中形成 DBP 的基本原理以及研究结果在海水淡化操作中的应用。该项目将涵盖四个研究目标。首先，将在模拟藻华期间海水淡化消毒的条件下评估与藻华相关的海洋藻类物种的 DBP 形成潜力。将根据其与美国沿海海洋藻华的相关性来选择代表性物种。藻类培养物和提取的细胞内和细胞外 AOM 将接受一系列消毒剂、氯、氯胺、二氧化氯、臭氧、高锰酸盐及其组合。其次，将评估来自不同藻类生长阶段的新鲜 AOM 以及生物和非生物转化后的老化 AOM 的 DBP 形成。第三，将确定海藻细胞形成 DBP 的机制以及重要的 DBP 前体。海水淡化情景下 DBP 形成的基本知识将成为设计海水淡化设施 DBP 预防策略的基础。最后，将描述消毒时 AOM 转化对其膜污染潜力的影响，以提出实现膜污染控制和 DBP 预防之间平衡的策略。气体、液体和尺寸排阻色谱、质谱和分光光度测定等分析工具将用于监测 DBP 形成并表征 AOM 转化。整体教育活动将包括研究生研究和指导培训、为本科生提供研究经验、将基于合作设计项目的学习纳入研究生和本科生环境工程课程，以及专注于高中和初中教师发展的 K-12 外展活动。

项目成果

Effects of peracetic acid on aromatic polyamide nanofiltration membranes: a comparative study with chlorine

• DOI: 10.1039/d0ew01007c
• 发表时间: 2021-02-01
• 期刊: ENVIRONMENTAL SCIENCE-WATER RESEARCH & TECHNOLOGY
• 影响因子: 5
• 作者: Ghafari, Mohsen;Mohona, Tashfia M.;Dai, Ning
• 通讯作者: Dai, Ning

Comparative Degradation Kinetics Study of Polyamide Thin Films in Aqueous Solutions of Chlorine and Peracetic Acid Using Quartz Crystal Microbalance

• DOI: 10.1021/acs.langmuir.1c02835
• 发表时间: 2021-12-07
• 期刊: LANGMUIR
• 影响因子: 3.9
• 作者: Mohona, Tashfia M.;Dai, Ning;Nalam, Prathima C.
• 通讯作者: Nalam, Prathima C.

Effects of Sunlight on the Formation Potential of Dichloroacetonitrile and Bromochloroacetonitrile from Wastewater Effluents

阳光对废水中二氯乙腈和溴氯乙腈形成潜力的影响

• DOI: 10.1021/acs.est.9b06526
• 发表时间: 2020
• 期刊: Environmental Science & Technology
• 影响因子: 11.4
• 作者: Xu, Jiale;Kralles, Zachary T.;Hart, Christine H.;Dai, Ning
• 通讯作者: Dai, Ning

Removal of disinfection byproducts in forward osmosis for wastewater recycling

• DOI: 10.1016/j.memsci.2018.07.041
• 发表时间: 2018-10
• 期刊: Journal of Membrane Science
• 影响因子: 9.5
• 作者: Jiale Xu;Thien N. Tran;Haiqing Lin;Ning Dai

Assessing disinfection byproduct risks for algal impacted surface waters and the effects of peracetic acid pre-oxidation

评估受藻类影响的地表水的消毒副产物风险以及过乙酸预氧化的影响

• DOI: 10.1039/d0ew00237b
• 发表时间: 2020
• 期刊: Environmental Science: Water Research & Technology
• 作者: Kralles, Zachary T.;Ikuma, Kaoru;Dai, Ning
• 通讯作者: Dai, Ning