Experimental Study on Plant-derived Urease-induced Calcium Carbonate Precipitation for Immobilizing Limestone Dusts
DU Changbo1,*, TAO Han2, YI Fu1,3, HUANG Huijie1, CHENG Chuanwang1
1 College of Civil Engineering, Liaoning Technical University, Fuxin 123000, Liaoning, China 2 School of Civil Engineering, Chongqing Jiaotong University, Chongqing 400074, China 3 Beijing Jingneng Geological Engineering Co., Ltd., Beijing 102300, China
Abstract: Dust in open-pit limestone mines can cause air, water, and soil pollution, adversely affect human health and surrounding ecosystems, and restrict the construction and production of green mines. To solve this problem, based on enzyme-induced carbonate precipitation technology, soybean urease was used to prepare a biological dust suppressant. The immobilization effect of biological dust suppressant on limestone dust was analyzed from macro and micro perspectives, and its immobilization mechanism was revealed. The results showed that the activity of urease was closely related to urea concentration and temperature. When the concentration of the cementing solution was 0.8 mol·L-1, the calcium carbonate precipitation ratio of the biological dust suppressant was the largest, with a pH of 7.47, indicating weak alkalinity. The production of calcium carbonate under the action of a biological dust suppressant was significantly improved, and the dust suppression efficiency was greatly improved. The biological dust suppressant can effectively improve the anti-wind erosion ability, and the dust suppression efficiency reaches 49.65% at the highest wind speed and 85.45% at the lowest wind speed. In addition, the biological dust suppressant can effectively slow down the corrosion rate, reaching 0.020 mm/a at 96 h, which is about 11.05% of water. The mineralization products of enzyme-induced carbonate precipitation (EICP) are mainly calcite calcium carbonate, which have the functions of filling, cementation, connection, and overall immobilization, and can effectively immobilize limestone dust. Studies have shown that the economy, environmental protection, sustainability, and positive impact on limestone dust of EICP technology make it a potentially promising solution for dust suppression.
1 Nie W, Xu C W, Peng H T,et al. Materials Reports, 2023, 37(15), 22030228(in Chinese). 聂文, 许长炜, 彭慧天, 等.材料导报, 2023, 37(15), 22030228. 2 Wang Y, Jiang Z. Case Studies in Thermal Engineering, 2021, 25, 100896. 3 Zhou Q, Qin B. Fuel, 2021, 302, 121196. 4 Zhou G, Xu Y, Wang Y, et al. Journal of Environmental Management, 2023, 343, 118181. 5 Zhan Q, Qian C, Yi H. Construction and Building Materials, 2016, 121, 437. 6 Hamdan N, Kavazanjian Jr E. Géotechnique, 2016, 66(7), 546. 7 Hu X M, Liu J D, Feng Y, et al. Environmental Research, 2023, 219, 115121. 8 Wang H X, Miao L C, Sun X H,et al. Journal of Southeast University (Natural Science Edition), 2022, 52(4), 712(in Chinese). 王恒星, 缪林昌, 孙潇昊, 等.东南大学学报(自然科学版), 2022, 52(4), 712. 9 Almajed A, Abbas H, Arab M, et al. Journal of Cleaner Production, 2020, 274, 122627. 10 Yuan P B, Zhu L, Zhong X M, et al. Rock and Soil Mechanics, 2022, 43(12), 3385(in Chinese). 原鹏博, 朱磊, 钟秀梅, 等.岩土力学, 2022, 43(12), 3385. 11 Meng H, Shu S, Gao Y, et al. Engineering Geology, 2021, 294, 106374. 12 Tian W, Li T, Jia N,et al. Materials Reports, 2022,36(15), 78(in Chinese). 田威, 李腾, 贾能, 等.材料导报, 2022, 36(15), 78. 13 Ministry of Housing and Urban-Rural Development of the People's Republic of China. Standards for geotechnical test methods (GB/T 50123-2019), China Planning Press, China, 2019 (in Chinese). 中华人民共和国住房和城乡建设部.土工试验方法标准(GB/T 50123-2019), 中国计划出版社,2019. 14 Whiffin V S, Van Passen L A, Harkes M P. Geomicrobiology Journal, 2007, 24(5), 417. 15 Putra H, Yasuhara H, Kinoshita N, et al. Crystals, 2017, 7(2), 59. 16 Jiang Q W, Huang M, Cui M J, et al. Journal of Engineering Geology, DOI:10.13544/j.cnki.jeg.2023-0070 (in Chinese). 姜启武, 黄明, 崔明娟, 等. 工程地质学报, DOI:10.13544/j.cnki.jeg.2023-0070. 17 Zhan Q, Qian C. Construction and Building Materials, 2017, 133, 73. 18 Yasuhara H, Neupane D, Hayashi K, et al. Soils and Foundations, 2012, 52(3), 539. 19 National Machinery Industry Bureau of China. Metals materials uniform corrosion methods of laboratory immersion testing (JB/T 7901-1999 ), Instrumentation Technology and Economy Institute, China, 1999(in Chinese). 中国机械工业局.金属材料实验室均匀腐蚀全浸试验方法(JB/T 7901-1999),机械工业仪器仪表综合技术经济研究所,1999. 20 Li T.Study on mechanical properties and mechanism of loessimproved by ElCP solutions with different calcium sources. Master's Thesis, Chang'an University, China, 2022 (in Chinese). 李腾. 不同钙源EICP溶液改良黄土力学性能及微观机制研究. 硕士学位论文, 长安大学, 2022. 21 Wu M, Hu X, Zhang Q, et al. Journal of Cleaner Production, 2020, 273, 123162. 22 Wu L Y, Miao L C, Sun X H, et al. Chinese Journal of Geotechnical Engineering, 2020, 42(4), 714(in Chinese). 吴林玉, 缪林昌, 孙潇昊, 等.岩土工程学报, 2020, 42(4), 714. 23 Pan L, Li Q, Zhou Y, et al. RSC advances, 2019, 9(70), 40827. 24 Wang P, Han H, Tian C, et al. Atmospheric Pollution Research, 2020, 11(6), 32. 25 Chu J, Ivanov V, Naeimi M, et al. Acta Geotechnica, 2014, 9, 277. 26 Liu L, Liu H, Xiao Y, et al. Bulletin of Engineering Geology and the Environment, 2018, 77, 1781. 27 Zhu S, Zhao Y, Hu X, et al. Powder Technology, 2021, 383, 233. 28 Barrios A M, Lippard S J. Inorganic Chemistry, 2001, 40(6), 1250. 29 Krajewska B. Journal of Advanced Research, 2018, 13, 59.
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2025, Vol. 39 
