CO2-driven ion exchange for ammonium recovery from source-separated urine

IF 12.4 1区环境科学与生态学 Q1 ENGINEERING, ENVIRONMENTAL

Water Research Pub Date : 2025-01-10 DOI:10.1016/j.watres.2025.123132

Lei Zhou, Dian Wang, Jiayu Yu, Hongyi Zhang, Hang Dong

{"title":"CO2-driven ion exchange for ammonium recovery from source-separated urine","authors":"Lei Zhou, Dian Wang, Jiayu Yu, Hongyi Zhang, Hang Dong","doi":"10.1016/j.watres.2025.123132","DOIUrl":null,"url":null,"abstract":"<div><div>Nitrogen recovery from urine and CO<sub>2</sub> utilization are both vital for achieving a circular economy and mitigating climate change. Divided engineering solutions have been proposed to address either problem, but there is still a lack of integrated technologies to simultaneously tackle the two tasks. We demonstrated CO<sub>2</sub>-driven ion exchange for nitrogen recovery (CIXNR) from urine and evaluated the process in Malawi. By comprehensively studying the ion exchange chemistry using a proton-form weak acid cation exchanger (WAC-H), we revealed the suppressed adsorption capacity caused by counterion releasing. Regulating aqueous pH optimized the WAC-H capacity, particularly, by the natural buffering capacity provided by bicarbonate in the hydrolyzed urine. CO<sub>2</sub> regeneration achieved over 75 % nitrogen recovery in a multi-cycle test with synthetic hydrolyzed urine. A higher CO<sub>2</sub> pressure resulted in faster regeneration kinetics due to a lower aqueous pH and higher proton concentration gradient. Our field outreach activity in Malawi indicated future research demand in adapting the system for resource-limited, rural, and no-electricity areas. We envision this study to inspire more integrated solutions to tackle both circular economy and climate actions and call for more field outreach activities to facilitate urine technology adoption in developing countries.</div></div>","PeriodicalId":443,"journal":{"name":"Water Research","volume":"274 ","pages":"Article 123132"},"PeriodicalIF":12.4000,"publicationDate":"2025-01-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"Water Research","FirstCategoryId":"93","ListUrlMain":"https://www.sciencedirect.com/science/article/pii/S0043135425000466","RegionNum":1,"RegionCategory":"环境科学与生态学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q1","JCRName":"ENGINEERING, ENVIRONMENTAL","Score":null,"Total":0}

引用次数: 0

Abstract

Nitrogen recovery from urine and CO₂ utilization are both vital for achieving a circular economy and mitigating climate change. Divided engineering solutions have been proposed to address either problem, but there is still a lack of integrated technologies to simultaneously tackle the two tasks. We demonstrated CO₂-driven ion exchange for nitrogen recovery (CIXNR) from urine and evaluated the process in Malawi. By comprehensively studying the ion exchange chemistry using a proton-form weak acid cation exchanger (WAC-H), we revealed the suppressed adsorption capacity caused by counterion releasing. Regulating aqueous pH optimized the WAC-H capacity, particularly, by the natural buffering capacity provided by bicarbonate in the hydrolyzed urine. CO₂ regeneration achieved over 75 % nitrogen recovery in a multi-cycle test with synthetic hydrolyzed urine. A higher CO₂ pressure resulted in faster regeneration kinetics due to a lower aqueous pH and higher proton concentration gradient. Our field outreach activity in Malawi indicated future research demand in adapting the system for resource-limited, rural, and no-electricity areas. We envision this study to inspire more integrated solutions to tackle both circular economy and climate actions and call for more field outreach activities to facilitate urine technology adoption in developing countries.

Abstract Image

查看原文本刊更多论文

二氧化碳驱动离子交换从源分离尿液中回收铵

从尿液中回收氮和利用二氧化碳对于实现循环经济和减缓气候变化都至关重要。已经提出了分裂的工程解决方案来解决这两个问题，但仍然缺乏同时解决这两个任务的集成技术。我们演示了二氧化碳驱动离子交换从尿液中回收氮（CIXNR），并在马拉维评估了这一过程。通过对质子型弱酸阳离子交换剂（WAC-H）离子交换化学的综合研究，揭示了反离子释放对吸附能力的抑制作用。调节水溶液pH值优化了WAC-H容量，特别是通过水解尿液中的碳酸氢盐提供的自然缓冲能力。在合成水解尿液的多循环试验中，CO2再生实现了75%以上的氮回收率。由于较低的水pH值和较高的质子浓度梯度，较高的CO2压力导致更快的再生动力学。我们在马拉维的实地推广活动表明，未来的研究需要使该系统适应资源有限、农村和无电地区。我们希望这项研究能够激发出更多综合解决方案，以应对循环经济和气候行动，并呼吁开展更多的实地推广活动，以促进发展中国家采用尿液技术。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

求助全文

约1分钟内获得全文求助全文

来源期刊

Water Research 环境科学-工程：环境

CiteScore

20.80

自引率

9.40%

发文量

1307

审稿时长

38 days

期刊介绍： Water Research, along with its open access companion journal Water Research X, serves as a platform for publishing original research papers covering various aspects of the science and technology related to the anthropogenic water cycle, water quality, and its management worldwide. The audience targeted by the journal comprises biologists, chemical engineers, chemists, civil engineers, environmental engineers, limnologists, and microbiologists. The scope of the journal include: •Treatment processes for water and wastewaters (municipal, agricultural, industrial, and on-site treatment), including resource recovery and residuals management; •Urban hydrology including sewer systems, stormwater management, and green infrastructure; •Drinking water treatment and distribution; •Potable and non-potable water reuse; •Sanitation, public health, and risk assessment; •Anaerobic digestion, solid and hazardous waste management, including source characterization and the effects and control of leachates and gaseous emissions; •Contaminants (chemical, microbial, anthropogenic particles such as nanoparticles or microplastics) and related water quality sensing, monitoring, fate, and assessment; •Anthropogenic impacts on inland, tidal, coastal and urban waters, focusing on surface and ground waters, and point and non-point sources of pollution; •Environmental restoration, linked to surface water, groundwater and groundwater remediation; •Analysis of the interfaces between sediments and water, and between water and atmosphere, focusing specifically on anthropogenic impacts; •Mathematical modelling, systems analysis, machine learning, and beneficial use of big data related to the anthropogenic water cycle; •Socio-economic, policy, and regulations studies.

文献相关原料

公司名称

产品信息

阿拉丁

Jack bean urease