Abstract Citrus reticulata (tangerine) peels extract was used to mediate the synthesis of copper nanoparticles (ETP-CuNPs). The product was characterized and applied as inhibitor for steel corrosion induced by 1 M HCl and Desulfovibrio sp. Round-shaped, monodisperse, non-aggregated crystals of zero-valent Cu with sizes between 54 and 72 nm were obtained. ETP-CuNPs triggered a 3-log reduction in Desulfovibio sp population at 1.96 mg/L MIC with biocorrosion inhibition efficiency of 79.8% and 68.4% at 303 K and 333 K respectively. At these temperatures, 1.0 g/L ETP-CuNPs also inhibited acid corrosion with efficiency of 95.3% and 84.6% respectively. Owing to smaller sizes, the nanoparticles more easily permeate through bacteria cell wall to alter their metabolic activities and growth than the extract. In the acid solution, ETP-CuNPs adsorb spontaneously on the steel surface via both physical and chemical mechanism using C C, O–H, C–O and N–H groups from phyto-compounds capped to Cu. Modification of the extract into nanoparticles enhanced the efficiency and better surface protection as determined by electrochemical, weight loss and surface characterization techniques. An alternative cost effective new material for simultaneous inhibition of acid and biocorrosion in the oilfield has therefore been demonstrated in this study.

中文翻译：

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柑橘皮提取物介导的铜纳米颗粒复合物减轻管道钢的微生物降解和酸腐蚀

摘要 柑橘皮提取物用于介导铜纳米颗粒 (ETP-CuNPs) 的合成。该产品被表征并用作由 1 M HCl 和 Desulfovibrio sp. 诱导的钢腐蚀抑制剂。获得了尺寸在 54 到 72 nm 之间的圆形、单分散、非聚集的零价铜晶体。ETP-CuNPs 在 1.96 mg/L MIC 下触发了 Desulfovibio sp 种群的 3-log 减少，在 303 K 和 333 K 下生物腐蚀抑制效率分别为 79.8% 和 68.4%。在这些温度下，1.0 g/L ETP-CuNPs 也能抑制酸腐蚀，效率分别为 95.3% 和 84.6%。由于尺寸较小，纳米颗粒比提取物更容易渗透细菌细胞壁以改变其代谢活动和生长。在酸性溶液中，ETP-CuNPs 使用 CC、O-H、C-O 和 N-H 基团通过物理和化学机制自发吸附在钢表面上，这些基团来自覆盖在 Cu 上的植物化合物。根据电化学、失重和表面表征技术，将提取物改性为纳米颗粒可提高效率和更好的表面保护。因此，本研究展示了一种替代的成本有效的新材料，可同时抑制油田中的酸和生物腐蚀。