文献类型：期刊文献

英文题名：Enhanced phoxim biodegradation by immobilizing Novosphingobium sp. RL4 on attapulgite-sodium alginate

作者：Peng, Tong[1,2];Huang, Yining[2];Yang, Tao[2,3];Wang, Yinquan[2];Jin, Ling[2]

第一作者：Peng, Tong;彭涛

通信作者：Wang, YQ[1];Jin, L[1]

机构：[1]Nantong Univ, Basic Med Res Ctr, Sch Med, Nantong, Peoples R China;[2]Gansu Univ Chinese Med, Coll Pharm, Lanzhou, Peoples R China;[3]Gansu Acad Sci, Key Lab Microbial Resources Exploitat & Applicat, Inst Biol, Lanzhou, Peoples R China

第一机构：Nantong Univ, Basic Med Res Ctr, Sch Med, Nantong, Peoples R China

通信机构：[1]corresponding author), Gansu Univ Chinese Med, Coll Pharm, Lanzhou, Peoples R China.|[1073501e14fb35863569f]甘肃中医药大学药学院（西北中藏药协同创新中心办公室）;[10735]甘肃中医药大学;

年份：2025

卷号：16

外文期刊名：FRONTIERS IN MICROBIOLOGY

收录：;Scopus(收录号：2-s2.0-105003665747);WOS:【SCI-EXPANDED(收录号:WOS:001473147100001)】；

基金：The author(s) declare that financial support was received for the research and/or publication of this article. This research was funded by the Strategic Research and Consulting Project of the Chinese Academy of Engineering (GS2021ZDA06), Double First-Class Major Scientific Research Project of Gansu Provincial Department of Education (GSSYLXM-05), Open Fund Project of the Collaborative Innovation Center Jointly Built by the Provinces and Ministries of Chinese and Tibetan medicine in Northwest China (Xbzzy2022-01) and Gansu Province Science and Technology Major Special Project (23ZDFA013-1).

语种：英文

外文关键词：phoxim; Novosphingobium sp.; sodium alginate; attapulgite; biochar

摘要：Background Residual phoxim pollution presents a potential threat to natural ecosystems and human health. The immobilization of degrading strains on natural adsorbent materials is a common strategy to enhance the degradation of target compounds in the environment by the strains.Methods A phoxim-degrading bacterial strain was isolated from the rhizosphere soil of rhubarb (Rheum palmatum L.), which had been exposed to long-term phoxim contamination. To enhance its stability and practical applicability, sodium alginate (SA) was utilized as a carrier material, while biochar (BC) and attapulgite (ATP) served as adsorption materials. These components were used to immobilize the strain, forming three distinct bacterial bead formulations: SA-RL4, SA + BC-RL4, and SA + ATP-RL4.Results The isolated phoxim-degrading strain was identified as Novosphingobium sp. RL4. Furthermore, the degradation products of phoxim by strain RL4 were analyzed and characterized. Based on the specific surface area, mass-transfer performance results, adsorption isotherms, and degradation efficiency, the addition of ATP or BC to SA has an equally positive impact on the degradation of phoxim by immobilized microspheres. ATP can replace BC as an adsorbent carrier material for embedding bacteria to a certain extent. At 20 mg/L, SA + ATP-RL4 degraded 89.37% of phoxim in 72 h. Importantly, SA + ATP-RL4 can be reused, and the degradation efficiency remained above 80% after 5 cycles. Furthermore, it exhibits high tolerance and better degradation ability compared to free cells of RL4 when used in treating agricultural wastewater containing phoxim.Conclusion SA + ATP-RL4 shows potential for in situ remediation of phoxim-contaminated environments.