Key Laboratory of Soil Environment and Pollution Remediation, Institute of Soil Science, Chinese Academy of Sciences, Nanjing 210008, China.
Zhejiang University, Hangzhou, China.
J Hazard Mater. 2022 Jul 5;433:128749. doi: 10.1016/j.jhazmat.2022.128749. Epub 2022 Mar 23.
Thermally enhanced bioremediation (TEB), a new concept proposed in recent years, explores the combination of thermal treatment and bioremediation to address the challenges of the low efficiency and long duration of bioremediation. This study presented a comprehensive review regarding the fundamentals of TEB and its applications in soil and groundwater remediation. The temperature effects on the bioremediation of contaminants were systematically reviewed. The thermal effects on the physical, chemical and biological characteristics of soil, and the corresponding changes of contaminants bioavailability and microbial metabolic activities were summarized. Specifically, the increase in temperature within a suitable range can proliferate enzymes enrichment, extracellular polysaccharides and biosurfactants production, and further enhancing bioremediation. Furthermore, a systematic evaluation of TEB applications by utilizing traditional in situ heating technologies, as well as renewable energy (e.g., stored aquifer thermal energy and solar energy), was provided. Additionally, TEB has been applied as a biological polishing technology post thermal treatment, which can be a cost-effective method to address the contaminants rebounds in groundwater remediation. However, there are still various challenges to be addressed in TEB, and future research perspectives to further improve the basic understanding and applications of TEB for the remediation of contaminated soil and groundwater are presented.
热强化生物修复（TEB）是近年来提出的新概念，探索了热处理与生物修复的结合，以解决生物修复效率低和耗时长的挑战。本研究对 TEB 的基本原理及其在土壤和地下水修复中的应用进行了全面综述。系统回顾了温度对污染物生物修复的影响。总结了温度对土壤物理、化学和生物特性的影响，以及污染物生物可利用性和微生物代谢活性的相应变化。具体来说，在适宜的范围内提高温度可以促进酶的富集、胞外多糖和生物表面活性剂的产生，从而进一步增强生物修复。此外，还通过利用传统的原位加热技术以及可再生能源（如含水层储能和太阳能），对 TEB 的应用进行了系统评估。此外，TEB 已作为热处理后的生物抛光技术应用，这是解决地下水修复中污染物反弹的一种经济有效的方法。然而，TEB 仍面临诸多挑战，提出了进一步提高 TEB 对污染土壤和地下水修复的基础理解和应用的未来研究展望。
