煤油热分解产生的碳质煤烟:涂料保存的先驱报告

O. Obidi, O. Okoli, S. Nwachukwu
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摘要

细菌对传统油漆杀菌剂的耐药性已被广泛记录。然而,关于碳质烟灰作为一种可行的替代品的防腐潜力的研究是新颖的。新鲜的油漆样品(SA, SB和SC)从尼日利亚拉各斯一家著名的油漆制造公司收集了一份副本。SA采用常规油漆杀菌剂生产,SB和SC不使用杀菌剂。所有样品接种0.032 × 106 cfu/mL铜绿假单胞菌PA01 (NC 002516.2),经16S rDNA分析鉴定。以200 mL v/v向SB中添加粗烟灰(蒸馏水10 g/L)。通过对烟灰样品的细菌种群(BP)、光密度(OD600nm)、粘度(VIS)、透光率(TR)和比重(SG)的监测,研究烟灰的保鲜效果,为期14周。BP分别从0.032 ~ 31.61 × 106和0.032 ~ 112.93 × 106显著升高。相比之下,SB在第4周从0.032-24.63 × 106增加,但在第14周从24.63 - 10.95 × 106减少。第8周,SA的OD值从1.55增加到1.98,第14周下降到1.74。SB在第4周从1.60下降到1.49,在第14周上升到1.63,SC在第14周从1.59上升到2.54。SA和SC的TR分别从1.80增加到2.30和1.25增加到2.20。与此相反,粗煤烟的TR从2.00下降到1.25,所有样品的粘度和比重值都随着时间的推移而下降,其中粗煤烟的下降幅度最大,而粗煤烟的下降幅度最小。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
Carbonaceous Soot from Thermal Decomposition of Kerosene: A Pioneering Report for Paint Preservation
Abstract Bacterial resistance to conventional paint biocides is widely documented. However, an investigation regarding the preservative potential of carbonaceous soot as a viable alternative is novel. Fresh paint samples (SA, SB and SC) were collected in duplicates from a reputable paint manufacturing company in Lagos, Nigeria. SA was produced with conventional paint biocide, SB and SC were without biocide. All samples were inoculated with 0.032 × 106 cfu/mL of Pseudomonas aeruginosa PA01 (NC 002516.2) previously isolated from spoilt paints and identified by the 16S rDNA analysis. SB was supplemented with crude soot (10 g/L of distilled water) at 200 mL v/v. The preservative efficiency of soot was investigated by monitoring the bacterial population (BP), optical density (OD600nm), viscosity (VIS), the transmittance (TR) and specific gravity (SG) of the samples bi-weekly for 14 weeks. BP increased drastically from 0.032-31.61 × 106 and from 0.032-112.93 × 106 in SA and SC respectively. In contrast, SB increased from 0.032-24.63 × 106 by week 4 but reduced from 24.63 – 10.95 × 106 by week 14. The OD of SA increased from 1.55 to 1.98 by week 8 and decreased to 1.74 by week 14. SB had a decrease from 1.60 to 1.49 by week 4 and increased to 1.63 by week 14, while SC increased from 1.59 to 2.54 by the 14th week.TR increased from 1.80 to 2.30 and 1.25 to 2.20 in SA and SC respectively. In contrast, TR decreased from 2.00 to 1.25 in SB. The viscosity and specific gravity values of all the samples decreased with time with the highest decrease observed in SC and the lowest in SB. The test crude soot showed preservative potential in paints.
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