Academic Journal
Removal Behavior of Heavy Metals from Aqueous Solutions via Microbially Induced Carbonate Precipitation Driven by Acclimatized Sporosarcina pasteurii
| Title: | Removal Behavior of Heavy Metals from Aqueous Solutions via Microbially Induced Carbonate Precipitation Driven by Acclimatized Sporosarcina pasteurii |
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| Authors: | Xinxin Li, Yan Wang, Jiajie Tang, Keke Li |
| Source: | Applied Sciences, Vol 12, Iss 19, p 9958 (2022) |
| Publisher Information: | MDPI AG, 2022. |
| Publication Year: | 2022 |
| Collection: | LCC:Technology LCC:Engineering (General). Civil engineering (General) LCC:Biology (General) LCC:Physics LCC:Chemistry |
| Subject Terms: | microbially induced carbonate precipitation (MICP), biomineralization, Sporosarcina pasteurii, heavy metal, Technology, Engineering (General). Civil engineering (General), TA1-2040, Biology (General), QH301-705.5, Physics, QC1-999, Chemistry, QD1-999 |
| More Details: | Microbially induced carbonate precipitation (MICP) driven by Sporosarcina pasteurii was highly efficient for heavy metal (i.e., Cd2+, Cu2+ and Pb2+) removal in the range of 50 to 800 mg/L. Sporosarcina pasteurii bacteria were sequentially inoculated in nutrient broths amended with increased concentrations of heavy metals separately to improve the resistance to heavy metal environments. In the absence of Ca2+, the increasing urea concentration was conducive to Cd2+ removal with the best removal ratio 89.9–99.7% at a urea concentration of 2.0 mol/L, but had little positive effect on Cu2+ and Pb2+ removal, with a removal ratio of 62.6–64.4% and 71.4–97.6%, respectively, at a urea concentration of 0.5 mol/L. The heavy metal coprecipitated with Ca2+, leading to much more effective heavy metal removal, and the removal efficiency of Cd2+, Cu2+ and Pb2+ could reach 98.0–99.0, 78.1–82.1 and 98.0–100.0%, respectively. The Cu2+ deposit aggregated and cemented to form clusters, different from Cd2+ and Pb2+ deposits with comparatively dispersed microstructure. For all the three heavy metal precipitates, the predominant mineral was identified as calcite, the most thermodynamically stable polymorph of CaCO3. |
| Document Type: | article |
| File Description: | electronic resource |
| Language: | English |
| ISSN: | 12199958 2076-3417 |
| Relation: | https://www.mdpi.com/2076-3417/12/19/9958; https://doaj.org/toc/2076-3417 |
| DOI: | 10.3390/app12199958 |
| Access URL: | https://doaj.org/article/21afea7faf614211beaa46d7dabbe85e |
| Accession Number: | edsdoj.21afea7faf614211beaa46d7dabbe85e |
| Database: | Directory of Open Access Journals |
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| ISSN: | 12199958 20763417 |
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| DOI: | 10.3390/app12199958 |
| Published in: | Applied Sciences |
| Language: | English |