Investigation of the role of organic matter in partitioning of chemicals in the municipal wastewater treatment process

城市污水处理过程中有机物在化学品分配中的作用研究

• 批准号: RGPIN-2016-06245
• 负责人: McPhedran, Kerry
• 金额: $ 2.62万
• 依托单位: University of Saskatchewan
• 依托单位国家: 加拿大
• 项目类别: Discovery Grants Program - Individual
• 财政年份: 2022
• 资助国家: 加拿大
• 起止时间: 2022-01-01 至 2023-12-31
• 项目状态: 已结题
• 来源: https://www.nserc-crsng.gc.ca/ase-oro/Details-Detailles_eng.asp?id=749528
• 关键词: Investigation; role; organic; matter; partitioning

The widespread uses and applications of historic and newly emerging chemicals of environmental concern (CECs) is of increasing interest to the scientific community, industry, government and the general public in response to the potential health risks of acute and chronic exposures of CECs to organisms in receiving environments. CECs are introduced into aquatic environments through various sources including wastewater streams, agricultural and storm-water runoffs. Of these, municipal wastewater treatment plant (MWTP) effluents are a continuing issue for Canadians making the improvement of municipal wastewater management a critical element for a sustainable ecological future for lakes and rivers.Partitioning of CECs to organic matter (OM), is important in their fate and transport during the MWTP process, but has been poorly investigated in MWTPs. Partitioning to OM has historically been described via chemical hydrophobicity which has been included in MWTP models via the octanol-water partitioning coefficient. However, CECs include contaminants having widely varying physicochemical properties which may not follow partitioning based on hydrophobicity. Knowledge of CEC partitioning behaviour is essential for determination of bioavailability and degradation, and potential MWTP loadings to the environment for the assessment of new and existing chemical impacts on human and environmental health.The goal of the proposed research program is to conduct comprehensive fundamental and applied research on the fate and transport of CECs including polybrominated diphenyl ethers (PBDEs), pharmaceuticals and personal care products (PPCPs), and nanomaterials (NMs) in MWTP processes. The program includes three projects with objectives of: (1) Assessment of MWTP models to determine necessary physicochemical parameters and partitioning mechanisms needed to be further understood to inform model improvement and development; (2) Determine the partitioning behaviour of PBDEs to various MWPT OM size fractions to elucidate partitioning mechanisms and correlate to various physicochemical parameters; and (3) Extend knowledge gained for PBDEs to research PPCPs and NMs including validation of passive organic chemical integrative samplers. Knowledge gained from this research program will be a critical component in our ability to assess and delineate the potential implications of CEC remediation, manufacture and disposal, while helping to open new approaches to MWTP processes to help mitigate CEC loading to receiving environments. The potential users of the results included water and wastewater treatment utilities, environmental protection agencies, industry, and governmental decision makers. The model improvements may also be adapted for use in MWTPs, in Canada and worldwide, to help inform relevant decisions on updating of treatment processes to safeguard environmental health.

历史上和新兴的环境问题化学品 (CEC) 的广泛使用和应用引起了科学界、工业界、政府和公众越来越多的兴趣，以应对 CEC 急性和慢性暴露于生物体中的潜在健康风险。接收环境。 CEC 通过各种来源引入水生环境，包括废水流、农业径流和暴雨径流。其中，城市污水处理厂 (MWTP) 的废水对加拿大人来说是一个持续存在的问题，这使得改善城市污水管理成为湖泊和河流可持续生态未来的关键因素。将 CEC 划分为有机物 (OM)，对于它们在 MWTP 过程中的命运和运输，但在 MWTP 中的研究很少。历史上，OM 的分配是通过化学疏水性来描述的，化学疏水性已通过辛醇-水分配系数包含在 MWTP 模型中。然而，CEC 包含具有广泛变化的物理化学性质的污染物，这些污染物可能不遵循基于疏水性的分配。了解 CEC 分配行为对于确定生物利用度和降解以及潜在的 MWTP 对环境的负荷至关重要，以评估新的和现有的化学物质对人类和环境健康的影响。拟议研究计划的目标是开展全面的基础和应用研究研究 MWTP 工艺中 CEC 的归宿和迁移，包括多溴二苯醚 (PBDE)、药品和个人护理产品 (PPCP) 以及纳米材料 (NM)。该计划包括三个项目，其目标是：（1）评估MWTP模型以确定必要的物理化学参数和需要进一步了解的分配机制，以便为模型改进和开发提供信息； (2) 确定 PBDEs 对各种 MWPT OM 尺寸分数的分配行为，以阐明分配机制并与各种物理化学参数相关联； (3) 将获得的 PBDE 知识扩展到 PPCP 和 NM 的研究，包括被动有机化学集成采样器的验证。从这项研究计划中获得的知识将成为我们评估和描述 CEC 修复、制造和处置的潜在影响的能力的关键组成部分，同时帮助开辟 MWTP 工艺的新方法，以帮助减轻 CEC 对接收环境的负荷。结果的潜在用户包括水和废水处理公用事业公司、环境保护机构、行业和政府决策者。该模型的改进也可以适用于加拿大和世界各地的MWTP，以帮助为更新处理流程以维护环境健康的相关决策提供信息。