Application of Biosurfactant Producing Microorganisms to Remediate Heavy Metal Pollution in El-Gabal El-Asfar Area

Abstract

In the present study, the effects of biosurfactant producing cells of different bacterial species namely Pseudochrobactrum lubricantisa, Lysobacter novalis, and crude biosurfactant extracted from Aspergillus niger were investigated as a cheap source to alleviate the availability of Pb 2+ for plants grown in El-Gabal El-Asfar area, Egypt. This is owing to these areas are basically depend on the reused wastewater for irrigation. Biosurfactant producing microorganisms were isolated from three different farms aged for 20, 40, and 60 years. The obtained results showed that, the biosurfactant producing bacteria decreased the availability of Pb 2+ in the outlet leachate during the leaching columns experiments. In contrast, Sr 2+ leachate showed the reverse trend that was observed with Pb 2+. Taguchi approach indicated that, the mechanisms of biosurfactant producing bacteria are very complicated and interfused with each other. The most factors affected the available form of Pb 2+ and Pb 2+ existed in organic form was Pb 2+ concentrations, however the exchangeable Pb 2+ , Pb 2+ bond to carbonate, Pb 2+ bond to sulfate, and plant content the most influential factors was biosurfactant producing bacteria. The most influential factors affected NPK uptake by watercress were found to take the following sequence biosurfactant producing bacteria > Sr 2+ doses > Pb 2+ doses.

Response of Barley Grown in Salt-Affected Soil to Bio and Mineral Fertilizers

“…While the application of mixed biofertilizer cultures in growing season 2017/2018 increased about 75.2, 87.2 and 75.6% in available nitrogen and 49.1, 74.3 and 58.1% in available phosphorus over the control at 50, 75 and 100% of chemical fertilizers, respectively. Similar results were obtained by Yaseen et al (2018), who found that the most significant factor affected NPK availability in soil was biosurfactant producing bacteria. PGPR play an essential role in nutrient cycling in soils, they involved in processes such as oxidation, nitrification, ammonification, nitrogen fixation, and other processes which lead to decomposition of soil organic matter and releasing essential inorganic plant nutrients to the soil.…”

Effect of super absorbent polymer and bio fertilization on Maize productivity and soil fertility under drought stress conditions

“…These results showed that SAP aids to increase the capacity of soil cationic exchange and better absorption of water and nutrition materials; that is the result of not washing the water and fertilizers. Yaseen et al (2018) also reported that PGPR was the most significant factor affected NPK availability in soil.…”

Effects of Heavy Metals/Metalloids and Soil Properties on Microbial Communities in Farmland in the Vicinity of a Metals Smelter

“…In addition, Lysobacter has a significant positive correlation with most heavy metals/metalloids ( Supplementary Figure 3 ). Lysobacter belongs to the phylum Proteobacteria, which have been reported to be tolerant to Hg, As, Cr, Pb, Co, Cu, and Zn ( Brito et al, 2013 ; Puopolo et al, 2016 ; Yaseen et al, 2018 ; Wang et al, 2020b ). Yaseen et al (2018) have confirmed that Lysobacter novalis can reduce A-Pb in soil by producing biosurfactants.…”

“…Lysobacter belongs to the phylum Proteobacteria, which have been reported to be tolerant to Hg, As, Cr, Pb, Co, Cu, and Zn ( Brito et al, 2013 ; Puopolo et al, 2016 ; Yaseen et al, 2018 ; Wang et al, 2020b ). Yaseen et al (2018) have confirmed that Lysobacter novalis can reduce A-Pb in soil by producing biosurfactants. It is worth noting that Gemmatimonas of the phylum Gemmatimonadetes, and Flavisolibacter and Chitinophaga of the phylum Bacteroides also exhibit heavy metal/metalloid resistance in this work.…”