PDF(Pubmed)
Abstract：
A significant amount of electronic obsoletes or electronic waste (e-waste) is being generated globally each year; of these, ~20% of obsolete electronic items have plastic components. Current remediation practices for e-waste have several setbacks due to its negative impact on the environment, agro-ecosystem, and human health. Therefore, comparative biodegradation studies of e-waste plastics by monoculture Pseudomonas aeruginosa strain PE10 and bacterial consortium consisting of Achromobacter insolitus strain PE2 (MF943156), Acinetobacter nosocomialis strain PE5 (MF943157), Pseudomonas lalkuanensis PE8 (CP043311), and Stenotrophomonas pavanii strain PE15 (MF943160) were carried out in situ. Biological treatment of e-waste with these candidates in soil ecosystems has been analyzed through diversified analytical techniques such as Fourier transform infrared spectroscopy (FTIR), thermogravimetric-derivative thermogravimetry-differential thermal analysis (TG-DTG-DTA), and scanning electron microscopy (SEM). Both P. aeruginosa strain PE10 and the bacterial consortium have a tremendous ability to accelerate the biodegradation process in the natural environment. However, FTIR analysis implied that the monoculture had better efficacy than the consortium, and it was consistent until the incubation period used for the study. Some polymeric bonds such as ν C=C and δ C-H were completely removed, and ν C=C ring stretching, νasym C-O-C, νsym C-H, etc. were introduced by strain PE10. Furthermore, thermal analysis results validated the structural deterioration of e-waste as the treated samples showed nearly two-fold weight loss (WL; 6.8%) than the untreated control (3.1%) at comparatively lower temperatures. SEM images provided the details of surface disintegrations. Conclusively, individual monoculture P. aeruginosa strain PE10 could be explored for e-waste bio-recycling in agricultural soil ecosystems thereby reducing the cost, time, and management of bioformulation in addition to hazardous pollutant reduction.
摘要：
全球每年都会产生大量的电子废品或电子废物（e-waste）；约20％的过时电子产品具有塑料组件。由于电子废物对环境的负面影响，目前对电子废物的补救做法出现了一些挫折，农业生态系统，和人类健康。因此,通过铜绿假单胞菌菌株PE10和由嗜酸性杆菌菌株PE2（MF943156）组成的细菌联盟对电子废塑料进行比较生物降解研究，医院不动杆菌菌株PE5（MF943157），铜绿假单胞菌PE8(CP043311),和拟南芥菌株PE15（MF943160）原位进行。通过傅里叶变换红外光谱(FTIR)等多种分析技术，对土壤生态系统中使用这些候选物的电子废物进行生物处理，热重-导数热重-差热分析(TG-DTG-DTA),和扫描电子显微镜（SEM）。铜绿假单胞菌菌株PE10和细菌聚生体都具有在自然环境中加速生物降解过程的巨大能力。然而,FTIR分析表明，单一培养比财团有更好的功效，并且在用于研究的潜伏期之前是一致的。一些聚合键，如νC=C和δC-H被完全去除，和νC=C环拉伸，νasymC-O-C，νsymC-H,等。由菌株PE10引入。此外，热分析结果验证了电子垃圾的结构恶化，因为在相对较低的温度下，处理过的样品比未处理的对照（3.1％）失重近两倍（WL;6.8％）。SEM图像提供了表面崩解的细节。最后，单独的单一培养铜绿假单胞菌菌株PE10可以探索用于农业土壤生态系统中的电子废物生物回收，从而降低成本，时间,和生物制剂的管理，除了减少有害污染物。
