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Developing a multi-functional modified zeolite for nutrient removal for eutrophic lake water

开发用于富营养化湖水营养物去除的多功能改性沸石

基本信息

批准号：
543353-2019
负责人：
Kazemian, Hossein
金额：
$ 1.82万
依托单位：
University of Northern British Columbia
依托单位国家：
加拿大
项目类别：
Engage Grants Program
财政年份：
2019
资助国家：
加拿大
起止时间：
2019-01-01 至 2020-12-31
项目状态：
已结题

来源：
https://www.nserc-crsng.gc.ca/ase-oro/Details-Detailles_eng.asp?id=680461
关键词：
Developing multi functional modified zeolite

项目摘要

Nutrients (e.g. phosphorous) from wastewater and agricultural runoff cause lake eutrophication leading to algal blooms that result in negative effects on aquatic life and pose risks to people and animals. The main objective of this research is to develop an inexpensive, yet effective, zeolite-based adsorbent to uptake phosphate from eutrophic water. In order to enhance natural zeolite capacity for phosphate removal, chemical modification of the raw zeolite is required. Zeolite-based anion adsorbents can be developed using different methods such as modification with cationic surfactant, metallic cations and nanoparticles. In this project, modification of zeolite with inorganic species such as magnesium and ammonium salts will be considered to develop a multifunctional adsorbent for phosphate removal. An intensified leaching test will be conducted on the nutrient laden adsorbents to study the fate of adsorbed nutrients under long-term exposure to environmental elements. This is a much-needed study that, to the best of our knowledge, has not been reported by any other research team. Mathematical modeling of adsorption/desorption reactions will be employed to evaluate the release profile under different environmental conditions.The next step is to evaluate the actual cost for the zeolite modification process in order to recommend a simplified manufacturing process. This includes a comparative analysis with other commercially available processes.

来自废水和农业径流的营养物（如磷）造成湖泊富营养化，导致藻华，对水生生物造成负面影响，并对人和动物构成风险。本研究的主要目的是开发一种廉价而有效的沸石基吸附剂来吸收富营养化水中的磷酸盐。为了提高天然沸石的除磷能力，需要对原料沸石进行化学改性。采用阳离子表面活性剂、金属阳离子和纳米颗粒改性等方法可制备沸石基阴离子吸附剂。在本项目中，将考虑用镁盐和铵盐等无机物质对沸石进行改性，以开发一种多功能的除磷吸附剂。对富含养分的吸附剂进行强化浸出试验，研究长期暴露于环境元素下被吸附养分的命运。这是一项急需的研究，据我们所知，还没有其他研究小组报道过。吸附/解吸反应的数学模型将用于评估不同环境条件下的释放曲线。下一步是评估沸石改性工艺的实际成本，以推荐简化的制造工艺。这包括与其他商业上可用的工艺进行比较分析。