Civil Engineering Department, Visvesvaraya National Institute of Technology, Nagpur, 440010, India.
Environ Pollut. 2023 Jan 1;316(Pt 1):120523. doi: 10.1016/j.envpol.2022.120523. Epub 2022 Oct 28.
The generation of Fly Ash (FA) waste is continuously piling up with the increasing energy demand. Recent research is focused towards reutilizing this fly ash waste through bioremediation practices. But fly ash retards the growth of plants and holds back to support the bioremediation process due to a deficiency of essential main nutrients. The present research envisages overcoming this problem by providing a novel concept of inducing isolated microbes and treated wastewater which provides necessary nutrients and promotes better plant growth and metal extraction. A pot experimental study was executed with treatments T (FA amended soil), T (FA with isolated microbe), and T (FA with microbes and treated wastewater). As an outcome of the present research, T gained relatively higher morphological characteristics viz. Leaf area (29.8%), absolute growth rate (61.7%), plastochron index (18.6%), biomass yield (47.3%) and enhanced metal extraction for Fe (34.4%), Al (27.1%), Mn (72.0%), Zn (17.5%) in comparison to the control. Treatment T also gained higher Remediation Efficiency (RE) and Bio-Concentration Factor (BCF) values for Al, Fe, and Mn. The involvement of nutrients via treated wastewater energizes the process mechanism and increases the working zone for the microbes thereby, enhancing the bioremediation.
粉煤灰（FA）废弃物的产生随着能源需求的不断增加而不断堆积。最近的研究集中在通过生物修复实践来再利用这种粉煤灰废物。但是，由于缺乏必要的主要营养物质，粉煤灰会阻碍植物的生长，并阻碍生物修复过程的支持。本研究通过提供一个新的概念来克服这个问题，即诱导分离的微生物和处理过的废水，这些废水提供必要的营养物质，并促进更好的植物生长和金属提取。进行了一项盆栽实验研究，处理方法为 T（添加粉煤灰的土壤）、T（添加分离微生物的粉煤灰）和 T（添加微生物和处理废水的粉煤灰）。作为本研究的结果，T 获得了相对较高的形态特征，即叶面积（29.8%）、绝对生长率（61.7%）、光周期指数（18.6%）、生物量产量（47.3%）和增强的金属提取效率Fe（34.4%）、Al（27.1%）、Mn（72.0%）、Zn（17.5%）与对照相比。处理 T 还获得了更高的 Al、Fe 和 Mn 的修复效率（RE）和生物浓缩因子（BCF）值。通过处理废水提供的营养物质为微生物提供了能量，并增加了微生物的工作区，从而增强了生物修复。
