Isolation of halotolerant Pseudomonas sp. KW-2 for the effective degradation p-arsanilic acid and immobilization its released inorganic arsenic

IF 6.9 2区环境科学与生态学 Q1 ENGINEERING, CHEMICAL Process Safety and Environmental Protection Pub Date : 2024-11-06 DOI:10.1016/j.psep.2024.11.021

Huawei Wang , Rongxue Zou , Xutong Jiang , Ya-nan Wang , Xueqin Wang , Yingjie Sun , Shupeng Li , Yujun Wang

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Abstract

p-arsanilic acid (p-ASA) contamination in highly saline environments has received increasing attention; however, p-ASA removal by salt-tolerant Mn(II)-oxidizing bacteria (MnOB) has not yet been reported. In this study, a salt-tolerant Mn(II)-oxidizing bacterium, Pseudomonas sp. KW-2, was isolated, and its capacity to efficiently oxidize Mn(II), form biogenic Mn oxides (BMO) and remove p-ASA was evaluated. Batch experiments indicated that KW-2 had good Mn(II) oxidation capacity (BMO∼100 μM) when the salinity of the medium ranged from 15.00 g/L to 55.00 g/L. Strain KW-2 exhibited strong p-ASA removal efficiency (80.38 %) via in situ-formed BMO when the initial concentration of p-ASA was 5.00 mg/L. p-ASA removal by strain KW-2 was driven primarily by the oxidation of BMO (84.45 %), and the released inorganic arsenic major entered the crystal structure of the BMO precipitates. This study provides a feasible method for the bioremediation of p-ASA in high-salt environments.

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分离耐卤假单胞菌 KW-2 以有效降解对胂酸并固定其释放的无机砷

高盐度环境中的对砷苯甲酸（p-ASA）污染问题日益受到关注；然而，利用耐盐锰(II)氧化细菌（MnOB）去除对砷苯甲酸的研究尚未见报道。本研究分离了耐盐锰(II)氧化细菌 KW-2 假单胞菌，并评估了其高效氧化锰(II)、形成生物氧化锰 (BMO) 和去除 p-ASA 的能力。批量实验表明，当培养基盐度在 15.00 g/L 至 55.00 g/L 之间时，KW-2 具有良好的 Mn(II) 氧化能力（BMO∼100 μM）。当初始 p-ASA 浓度为 5.00 mg/L 时，菌株 KW-2 通过原位形成的 BMO 对 p-ASA 的去除率很高（80.38%）。菌株 KW-2 对 p-ASA 的去除主要是由 BMO 的氧化作用驱动的（84.45%），释放的无机砷主要进入 BMO 沉淀的晶体结构中。这项研究为在高盐环境中对 p-ASA 进行生物修复提供了一种可行的方法。

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来源期刊

Process Safety and Environmental Protection 环境科学-工程：化工

CiteScore

11.40

自引率

15.40%

发文量

929

审稿时长

8.0 months

期刊介绍： The Process Safety and Environmental Protection (PSEP) journal is a leading international publication that focuses on the publication of high-quality, original research papers in the field of engineering, specifically those related to the safety of industrial processes and environmental protection. The journal encourages submissions that present new developments in safety and environmental aspects, particularly those that show how research findings can be applied in process engineering design and practice. PSEP is particularly interested in research that brings fresh perspectives to established engineering principles, identifies unsolved problems, or suggests directions for future research. The journal also values contributions that push the boundaries of traditional engineering and welcomes multidisciplinary papers. PSEP's articles are abstracted and indexed by a range of databases and services, which helps to ensure that the journal's research is accessible and recognized in the academic and professional communities. These databases include ANTE, Chemical Abstracts, Chemical Hazards in Industry, Current Contents, Elsevier Engineering Information database, Pascal Francis, Web of Science, Scopus, Engineering Information Database EnCompass LIT (Elsevier), and INSPEC. This wide coverage facilitates the dissemination of the journal's content to a global audience interested in process safety and environmental engineering.