文献类型：期刊文献

英文题名：Bioremediation of phenanthrene in saline-alkali soil by biochar- immobilized moderately halophilic bacteria combined with Suaeda salsa L.

作者：Cui, Changzheng[1,2];Shen, Jiamin[1];Zhu, Yi[3,4];Chen, Xin[1];Liu, Siyuan[1];Yang, Jie[1,5]

机构：[1]East China Univ Sci & Technol, Sch Resources & Environm Engn, State Environm Protect Key Lab Environm Risk Asses, Shanghai 200237, Peoples R China;[2]Shanghai Inst Pollut Control & Ecol Secur, Shanghai 200092, Peoples R China;[3]Shanghai Acad Landscape Architecture Sci & Plannin, Shanghai Engn Res Ctr Landscaping Challenging Urba, Key Lab Natl Forestry & Grassland Adm Ecol Landsca, Shanghai 200232, Peoples R China;[4]Fudan Univ, Shanghai Inst Eco Chongming, Minist Educ, Key Lab Biodivers Sci & Ecol Engn,Coastal Ecosyst, Shanghai 200438, Peoples R China;[5]Shanghai Acad Environm Sci, State Environm Protect Engn Ctr Urban Soil Contami, Shanghai 200233, Peoples R China

年份：2023

卷号：880

外文期刊名：SCIENCE OF THE TOTAL ENVIRONMENT

收录：;EI(收录号：20231613889414);WOS:【SCI-EXPANDED(收录号:WOS:000983534700001)】；

基金：Acknowledgements This work was supported by the National Natural Science Foundation of China (No:41877129) .

语种：英文

外文关键词：Bioremediation; Biochar; Polycyclic aromatic hydrocarbons; Suaeda salsa L; Saline-alkali soil

摘要：Polycyclic aromatic hydrocarbon (PAH) contaminated saline-alkali soil is commonly salinized and hardened, which leads to low self-purification efficiency, making it difficult to reuse and remediate. In this study, pot experiments were conducted to investigate remediation of PAH contaminated saline-alkali soil using biochar-immobilized Martelella sp. AD-3, and Suaeda salsa L (S. salsa). Reduction in phenanthrene concentration, PAH degradation func-tional genes, and the microbial community in the soil were analyzed. The soil properties and plant growth parameters were also analyzed. After a 40-day remediation, the removal rate of phenanthrene by biochar-immobilized bacteria combined with S. salsa (MBP group) was 91.67 %. Additionally, soil pH and electrical conductivity (EC) reduced by 0.15 and 1.78 ds/m, respectively. The fresh weight and leaf pigment contents increased by 1.30 and 1.35 times, respec-tively, which effectively alleviated the growth pressure on S. salsa in PAH-contaminated saline-alkali soil. Further-more, this remediation resulted in abundance of PAH degradation functional genes in the soil, with a value of 2.01 x 103 copies/g. The abundance of other PAH degraders such as Halomonas, Marinobacter, and Methylophaga in soil also increased. Furthermore, the highest abundance of Martelella genus was observed after the MBP treatment, in-dicating that strain AD-3 has a higher survival ability in the rhizosphere of S. salsa under the protection of biochar. This study provides a green, low-cost technique for remediation of PAH-contaminated saline-alkali soils.