Mesh coated with microbially induced nanoscale vaterite for oil-in-water emulsion separation

Tang, Sikai1,2; Wang, Yuze2

2024-11-01

10.1016/j.jwpe.2024.106132

JOURNAL OF WATER PROCESS ENGINEERING   影响因子和分区

2214-7144

Microbial-induced calcium carbonate precipitation (MICP), with its hydrophilic rough microstructures and as an environmentally friendly material modification method, has shown great potential for oil-water separation. However, its efficiency in separating oil-in-water emulsions remains challenging. This study advances the MICP method by producing microbially induced nanoscale calcium carbonate on a mesh using calcium acetate instead of traditional calcium chloride, successfully achieving efficient separation of oil-in-water emulsions. The stainless-steel mesh (SSM) after calcium acetate-MICP treatment obtained nano-elliptical flake-like vaterite (vaterite-SSM) and demonstrated superior superhydrophilicity and underwater superoleophobicity compared to the mesh coated with micro-cubic structured calcite (calcite-SSM) treated by calcium chloride-MICP. Notably, vaterite-SSM achieved a flux of up to 309 L & sdot;m(-2)& sdot;h(-1) and an oil rejection rate of over 98.7 % in gravity-driven separation of oil-in-water emulsions, demonstrating significant reusability after 6 cycles. Conversely, calciteSSM was ineffective in emulsion separation due to coating instability and large particle spacing. Additionally, vaterite-SSM effectively separated various oil-water mixtures, maintaining high performance across 30 separation cycles. This study underscores the important use of calcium acetate in MICP to obtain nano-elliptical flake- like vaterite for efficient oil-water emulsion separation, advancing the promise of MICP as an effective and sustainable method for environmental applications.

MICP micro-cubic structured calcite Nano-elliptical flake-like vaterite Underwater superoleophobicity Oil-in-water emulsions separation

SCI

英语

第一

Shenzhen Science and Technology Program["JCYJ20210324103812033","JCYJ20230807093108017"] ; National Natural Science Foundation of China[52171262] ; Guangdong Basic and Applied Basic Research Foundation[2024A1515011390]

Engineering ; Water Resources

Engineering, Environmental ; Engineering, Chemical ; Water Resources

WOS:001316845100001

ELSEVIER

Web of Science

1.Southern Univ Sci & Technol, Dept Ocean Sci & Engn, Shenzhen 518005, Peoples R China
2.Hunan Univ Arts & Sci, Dept Mech Engn, Changde 415000, Peoples R China

Tang, Sikai,Wang, Yuze. Mesh coated with microbially induced nanoscale vaterite for oil-in-water emulsion separation[J]. JOURNAL OF WATER PROCESS ENGINEERING,2024,67.

Tang, Sikai,&Wang, Yuze.(2024).Mesh coated with microbially induced nanoscale vaterite for oil-in-water emulsion separation.JOURNAL OF WATER PROCESS ENGINEERING,67.

Tang, Sikai,et al."Mesh coated with microbially induced nanoscale vaterite for oil-in-water emulsion separation".JOURNAL OF WATER PROCESS ENGINEERING 67(2024).