Evaluating the effects of contact time and leaching solution on measured solubilities of aerosol trace metals

Li, Rui; Dong, Shujun; Huang, Chengpeng; Feng, Yu; Wang, Fu; Li, Xiaofei; Zhang, Huanhuan; Ren, Yan; Guo, Mingxian; Chen, Qingcai; Ge, Baozhu; Tang, Mingjin

doi:10.1016/j.apgeochem.2022.105551

Cited by 9 publications

(6 citation statements)

References 66 publications

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“…Subsample 2a was leached using the protocol adopted by the lab at Guangzhou Institute of Geochemistry (GIG) (Li et al, 2023;Zhang et al, 2023). In brief, the subsample was shredded and then immersed in 20 mL ultrapure water for 2 h, stirred using an orbital shaker; subsequently, the solution was filtered through a polyethersulfone membrane syringe filter (with a pore size of 0.22 μm).…”

Section: Dissolved Elementsmentioning

confidence: 99%

“…Aerosol trace elements, originating from natural and anthropogenic sources, are of great concerns, as they significantly impact marine and terrestrial ecosystems (Boyd and Ellwood, 2010;Dong et al, 2023;Mahowald et al, 2018), have adverse effects on human health (Dahmardeh Behrooz et al, 2021;Fang et al, 2017;Gao et al, 2022;Wei et al, 2019), and play important roles in atmospheric chemistry (Al-Abadleh, 2024;Alexander et al, 2009;Mao et al, 2013;Martin and Hill, 1987;Wang et al, 2021). The dissolved fraction of aerosol trace elements, instead of their total abundance, is considered to be bioavailable (Baker and Croot, 2010;Ito et al, 2012;Mukhtar and Limbeck, 2013) and more chemically reactive in the atmosphere (Kebede et al, 2016;Mao et al, 2017).…”

Section: Introductionmentioning

confidence: 99%

“…Various leaching protocols have been used in previous studies to extract dissolved aerosol trace elements, as summarized in a recent paper (Li et al, 2023). In brief, available leaching protocols broadly consist of two catalogues, including flow-through leaching and batch leaching.…”

Section: Introductionmentioning

confidence: 99%

“…Furthermore, for batch leaching, various leaching solutions were used in previous studies, such as ultrapure water, filtered seawater, and formate/acetate buffers. Compared to filtered seawater and formate/acetate buffers, ultrapure water is more widely used in atmospheric research due to its simplicity and reproducibility (Li et al, 2023;Meskhidze et al, 2019); another important reason is that ultrapure water leaching does not introduce any other chemical species (except water) and thus can simultaneously extract water-soluble ions and organics for additional analysis.…”

Section: Introductionmentioning

confidence: 99%

“…Second, filters with different pore sizes, including 0.2-0.22 and 0.45 μm (and 0.02 μm to a less extent), are employed to filter the leaching solutions, contributing to the uncertainties in the reported solubility; however, the effects of filter pore size have seldom been experimentally examined. Third, some studies (Li et al, 2023;Mackey et al, 2015) suggested that contact time (2-8 h) could also influence the reported solubility.…”

Section: Introductionmentioning

confidence: 99%

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Aerosol trace element solubility determined using ultrapure water batch leaching: an intercomparison study of four different leaching protocols

Li,

Panda,

Chen

et al. 2024

Preprint

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Abstract. Solubility of aerosol trace elements, which determines their bioavailability and reactivity, is operationally defined and strongly depends on the leaching protocol used. Ultrapure water batch leaching is one of the most widely used leaching protocols, while the specific leaching protocols used in different labs can still differ in agitation methods, contact time, and filter pore size. It is yet unclear to which extent the difference in these experimental parameters would affect the aerosol trace element solubility reported. This work examined the effects of agitation methods, filter pore size and contact time on the solubility of nine aerosol trace elements, and found that the difference in agitation methods (shaking vs. sonication), filter pore size (0.22 vs. 0.45 μm), and contact time (1 vs. 2 h) only led to small and sometimes insignificant difference in the reported solubility. We further compared aerosol trace element solubility determined using four ultrapure water leaching protocols which are adopted by four different labs and vary in agitation methods, filter pore size and/or contact time, and observed good agreement in the reported solubility. Therefore, our work suggests that although ultrapure water batch leaching protocols used by different labs vary in specific experimental parameters, the determined aerosol trace element solubility is comparable. We recommend ultrapure water batch leaching to be one of the reference leaching schemes, and emphasize that additional consensus in the community on agitation methods, contact time and filter pore size is needed to formulate a standard operating procedure for ultrapure water batch leaching.

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Section: Dissolved Elementsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 3 more Smart Citations

Aerosol trace element solubility determined using ultrapure water batch leaching: an intercomparison study of four different leaching protocols

Li,

Panda,

Chen

et al. 2024

Preprint

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Recent Progress in Atmospheric Chemistry Research in China: Establishing a Theoretical Framework for the “Air Pollution Complex”

et al. 2023

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Atmospheric chemistry research has been growing rapidly in China in the last 25 years since the concept of the “air pollution complex” was first proposed by Professor Xiaoyan TANG in 1997. For papers published in 2021 on air pollution (only papers included in the Web of Science Core Collection database were considered), more than 24 000 papers were authored or co-authored by scientists working in China. In this paper, we review a limited number of representative and significant studies on atmospheric chemistry in China in the last few years, including studies on (1) sources and emission inventories, (2) atmospheric chemical processes, (3) interactions of air pollution with meteorology, weather and climate, (4) interactions between the biosphere and atmosphere, and (5) data assimilation. The intention was not to provide a complete review of all progress made in the last few years, but rather to serve as a starting point for learning more about atmospheric chemistry research in China. The advances reviewed in this paper have enabled a theoretical framework for the air pollution complex to be established, provided robust scientific support to highly successful air pollution control policies in China, and created great opportunities in education, training, and career development for many graduate students and young scientists. This paper further highlights that developing and low-income countries that are heavily affected by air pollution can benefit from these research advances, whilst at the same time acknowledging that many challenges and opportunities still remain in atmospheric chemistry research in China, to hopefully be addressed over the next few decades.

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Preface to “atmospheric geochemistry: A special issue endorsed by IGAC China working group and IAGC China working group”

Tang,

Geng,

Tong

et al. 2024

Applied Geochemistry

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Evaluating the effects of contact time and leaching solution on measured solubilities of aerosol trace metals

Cited by 9 publications

References 66 publications

Aerosol trace element solubility determined using ultrapure water batch leaching: an intercomparison study of four different leaching protocols

Aerosol trace element solubility determined using ultrapure water batch leaching: an intercomparison study of four different leaching protocols

Recent Progress in Atmospheric Chemistry Research in China: Establishing a Theoretical Framework for the “Air Pollution Complex”

Preface to “atmospheric geochemistry: A special issue endorsed by IGAC China working group and IAGC China working group”

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