Teran-Cuadrado Glenda, Polo-Cuadrado Efrain
Chemical Engineering Department, University of Atlantico, Puerto Colombia, Atlántico, Colombia.
Organic Syntesis Laboratory, Natural Resources Chemistry Institute, University of Talca, Talca, Maule, 3460000, Chile.
Heliyon. 2021 Apr 30;7(4):e06926. doi: 10.1016/j.heliyon.2021.e06926. eCollection 2021 Apr.
Oil spillage contamination has been one of the most common and challenging problems in marine ecosystems over the years due to frequent petroleum exploitation, washing, and transportation activities. The use of nature-derived surfactants has become an attractive approach to restore the sites affected by oil spillage. Several studies have demonstrated that nutrient addition is an efficient strategy to enhance oil biodegradation since microorganisms can use petroleum hydrocarbons as their carbon and energy source, thus favoring and increasing the hydrocarbons degradation rate. This study aimed to assess the effectiveness of a commercial bio-catalytic agent used in the biological remediation of crude oil-contaminated sites through the qualitative analysis of its properties. The tests applied to this bio-catalyst showed excellent results. For instance, the emulsification (E) and critical micellar concentration (CMC) assays displayed average values of 74.47% and 40 mg L, respectively. A significant reduction of Chemical Oxygen Demand (COD), turbidity, and Total Petroleum Hydrocarbon Content (TPHC) were observed in all the samples with bio-catalytic agent solution and aeration system. The best water quality was achieved by the sample with the highest concentration (10000 ppm) of bio-catalytic agent solution. It displayed a Total Petroleum Hydrocarbon removal efficiency (RTPH) of 81.537% after 30 days of the remediation time.
多年来，由于频繁的石油开采、清洗和运输活动，石油泄漏污染一直是海洋生态系统中最常见且具有挑战性的问题之一。使用天然衍生的表面活性剂已成为修复受石油泄漏影响场地的一种有吸引力的方法。多项研究表明，添加营养物质是提高石油生物降解效率的有效策略，因为微生物可以将石油烃作为其碳源和能源，从而有利于并提高烃类降解速率。本研究旨在通过对一种用于原油污染场地生物修复的商业生物催化剂的性质进行定性分析，评估其有效性。应用于这种生物催化剂的测试显示出优异的结果。例如，乳化（E）和临界胶束浓度（CMC）测定的平均值分别为74.47%和40 mg/L。在所有含有生物催化剂溶液和曝气系统的样品中，化学需氧量（COD）、浊度和总石油烃含量（TPHC）均显著降低。生物催化剂溶液浓度最高（10000 ppm）的样品水质最佳。在修复30天后，其总石油烃去除效率（RTPH）达到81.537%。
