Key Laboratory of Jiangxi Province for Agricultural Environmental Pollution Prevention and Control in Red Soil Hilly Region, School of Life Sciences, Jinggangshan University, Ji'an 343009, China.
Key Laboratory of Jiangxi Province for Agricultural Environmental Pollution Prevention and Control in Red Soil Hilly Region, School of Life Sciences, Jinggangshan University, Ji'an 343009, China.
Bioresour Technol. 2023 Nov;387:129603. doi: 10.1016/j.biortech.2023.129603. Epub 2023 Aug 5.
Efficient removal of organic dye pollution from contaminated water is a concern in the absorbent applications. In this study, a green biogenic calcium carbonate (BCC) absorbent was fabricated using Bacillus licheniformis for the removal of methylene blue (MB) from water. This was found to have superior adsorption capacity compared with abiotic calcium carbonate (ACC) and operate within a broad pH range from 3 to 9. MB adsorption on BCC was physical and exothermic. The hydrophobic features, rough nanoporous microstructure, and organic-inorganic mesoporous structure of the BCC may all be responsible for its favorable adsorption mass transfer. The adsorption energy of BCC had a more negative value than that of ACC, indicating a stronger MB interaction with BCC with a lower energy barrier. Hydrogen bonding and electrostatic attraction were involved in the adsorption process. Overall, the findings established a theoretical foundation for the application of BCC in remediation of MB-contaminated water.
从受污染的水中高效去除有机染料污染是吸附剂应用中的关注点。在这项研究中，利用地衣芽孢杆菌制备了一种绿色生物成因碳酸钙（BCC）吸附剂，用于从水中去除亚甲基蓝（MB）。与非生物成因碳酸钙（ACC）相比，BCC 具有更高的吸附容量，并且在 pH 值为 3 到 9 的较宽范围内起作用。BCC 对 MB 的吸附是物理吸附和放热的。BCC 的疏水性、粗糙的纳米多孔微观结构和有机-无机中孔结构都可能与其有利的吸附传质有关。BCC 的吸附能具有更负的值，表明 BCC 与 MB 的相互作用更强，能量势垒更低。吸附过程涉及氢键和静电吸引。总的来说，这些发现为 BCC 在修复 MB 污染水方面的应用奠定了理论基础。
