共查询到20条相似文献,搜索用时 125 毫秒
1.
2.
3.
4.
5.
6.
石油污染土壤的生物修复 总被引:6,自引:0,他引:6
石油污染土壤的生物修复具有高效、无二次污染和操作简便的特点,正逐步成为石油污染治理的一个重要领域。本文介绍了该方法的降解原理、各种技术措施、发展方向及应用前景。 相似文献
7.
8.
9.
随着石油工业的发展,石油泄漏事故频发,污染日益严重,使得石油污染成为一个迫切需要解决的世界性问题.与传统的物理、化学修复方法相比,微生物修复由于其经济性和环保性,已经成为修复土壤石油污染的主要方法之一.而在石油污染盐碱土壤中盐碱化改变了土壤的理化性质、抑制了土壤微生物的生长和代谢,已经成为微生物修复石油污染盐碱土壤的主要难点.因此,石油污染盐碱土壤微生物修复须利用具有耐盐碱能力的石油烃降解菌.综述了石油污染盐碱土壤的现状和危害,耐盐碱石油烃降解菌的筛选,微生物修复石油污染盐碱土壤的难点、方法及研究进展,并对微生物修复石油污染盐碱土壤的未来研究方向和应用前景进行了展望. 相似文献
10.
土壤石油烃污染已引起广泛关注,石油烃具有高毒性和持久性,对生态环境和人体健康会产生严重危害。本文综述了石油烃污染土壤修复技术的国内外研究进展,系统论述了微生物技术在石油烃污染土壤修复中的研究现状,重点探讨了微生物联合修复技术的过程机制和应用前景,包括植物-微生物联合修复、电动-微生物联合修复、表面活性剂强化微生物修复、化学氧化-微生物联合修复及动物-微生物联合修复等,并对未来石油烃污染土壤微生物修复技术的研究发展方向提出了展望。 相似文献
11.
12.
13.
14.
从大庆油田采油污水污染土壤中筛选出以聚丙烯酰胺为唯一氮源和唯一碳源的4株聚丙烯酰胺降解菌R1、R2、R3、Y3。通过游离菌与固定化菌降解聚丙烯酰胺效果的实验数据比较,证明了微生物固定化法降解聚丙烯酰胺具有优势。因此,采用微生物固定法修复采油污水污染土壤,通过固定化颗粒的制备难易程度、强度、费用及对聚丙烯酰胺和原油的去除率等条件,比较了5种包埋固定化制备方法,考察了优选出的包埋固化法对土壤中污染物的降解能力。结果表明:PVA+海藻酸钠+添加剂法得到的固定化颗粒强度好,操作简单,不易破损,且费用低,对土壤中聚丙烯酰胺去除率为79.5%,对原油的去除率可达到98.7%。对筛选出的4种菌株鉴定得知R1为芽孢乳杆菌属,R2为微球菌属,R3、Y3为假单胞菌属菌株。 相似文献
15.
Vaishnavi Manikkasundaram Abirami Baskaran Manigundan Kaari Vignesh Angamuthu Gopikrishnan Venugopal Radhakrishnan Manikkam 《Journal of surfactants and detergents》2023,26(4):491-503
The aim of this investigation is to produce and characterize biosurfactant from Streptomyces sp. HRB1 and to evaluate its biomedical and bioremediation potential. Biosurfactant producing property of Streptomyces sp. HRB1 isolated from petroleum contaminated soil was confirmed by hemolytic and oil spread assays. Based on the results of FT-IR spectral and GC–MS analysis, the biosurfactant was confirmed as glycolipid type. Biosurfactant from Streptomyces sp. HRB1 exhibited 71% inhibition against Pseudomonas aeruginosa biofilm formation, 77.33% quorum sensing inhibition property against Chromobacterium violeceum MTCC 2656, more than 80% inhibition in antioxidant assays namely, DPPH, ABTS, and metal chelation, promising anti-proliferative activity against leukemia and myeloma cells with low IC50 values, 96% decolorization of malachite green within 48 h of reaction time, and minimal toxicity against normal cell lines in dose-dependent manner. The taxonomic position of the potential strain HRB1 was further confirmed as Streptomyces enissocaesilis HRB1 based on their phenotypic and molecular characteristics. To conclude, Streptomyces enissocaesilis HRB1 isolated from petroleum-contaminated soil is a promising source for low-cost production of glycolipid biosurfactant with potential biomedical and environmental applications such as antiphytofungal, antibiofilm, anti-quorum sensing, antioxidant, anticancer, and dye degradation properties. 相似文献
16.
17.
18.
19.
Graciela I. Vecchioli Oscar R. Costanza Sergio A. Giorgieri Matthias Remmler 《Journal of chemical technology and biotechnology (Oxford, Oxfordshire : 1986)》1997,70(4):331-336
Bioremediation is capable of reducing the hydrocarbon concentration of contaminated soil by 75–95% depending on the soil type, the kind of hydrocarbons and the history of the contamination. The impact of different number of petrochemical sludge applications to soil on the degree of PAH elimination was assessed. A simple and reliable extraction and gas chromatographic method was used to facilitate more rapid determination of hydrocarbon contamination in soils and sludge wastes. Its application in a model laboratory bioremediation experiment and a pilot field study were used to illustrate its practical benefits. Post-remediation persistence of sludge constituents was evaluated after a single dose sludge application in the laboratory and after seven sludge applications in the field. A relative increase in the concentration of some PAHs was detected at the end of the experiments, but their individual concentrations were reduced to suggested values for industrial soils. The remaining concentration of total hydrocarbons in soil was found to be similar in both experiments, pointing to soil organic matter adsorption capacity as the factor determining hydrocarbon elimination limits in soil bioremediation. ©1997 SCI 相似文献