DOI: 10.1016/j.watres.2019.02.022
Scopus记录号: 2-s2.0-85062287210
论文题名: Effect of bovine serum albumin on stability and transport of kaolinite colloid
作者: Yan C. ; Cheng T. ; Shang J.
刊名: Water Research
ISSN: 431354
出版年: 2019
卷: 155 起始页码: 204
结束页码: 213
语种: 英语
英文关键词: BSA
; Clay colloids
; Fine particle aggregation and transport
; Steric force
; XDLVO theory
英文摘要: The stability and transport of clay colloids in groundwater are strongly influenced by colloid interactions with dissolved organic matter (DOM). Protein is an important DOM component that is ubiquitous in natural water, reclaimed water, and soil solutions. To date, the interactions between clay colloids and proteins have not been fully studied. The objective of this study was to examine the effect of bovine serum albumin (BSA), a representative protein, on the stability, aggregation, and transport of kaolinite colloids under neutral pH conditions. Hydrodynamic diameter and ζ-potential measurements, stability tests, and column transport experiments were performed in salt solutions with a range of ionic strengths and different BSA concentrations at pH 7. Additionally, BSA-kaolinite colloid interactions were studied using TEM and batch adsorption experiments. The experimental results showed that BSA prevented colloid aggregation and increased the stability and transport of colloids, especially at high ionic strength, even though the charges of kaolinite colloids were less negative in the presence of BSA. Theoretical calculation of the interaction energies indicated that XDLVO theory, in which the steric force is considered due to BSA adsorption, could correctly quantify the interaction energies in the presence of BSA. This study demonstrated that the role of protein needs to be determined in order to better predict the overall effect of DOM on particle aggregation and transport in the soil environment. © 2019 Elsevier Ltd Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/121909
Appears in Collections: 气候变化事实与影响
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作者单位: Department of Soil and Water Sciences, China Agricultural University, Beijing, 100193, China; Department of Earth Sciences, Memorial University St. John'sNewfoundland and Labrador A1B 3X5, Canada
Recommended Citation:
Yan C.,Cheng T.,Shang J.. Effect of bovine serum albumin on stability and transport of kaolinite colloid[J]. Water Research,2019-01-01,155