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This paper delineates the design and fabrication of Nafion and Chlorophyll-Nafion membranes in originating the flexible supercapacitors and direct alcoholic fuel cells. Herein, the procedure for the extraction of Chlorophyll from the plant leaves is demonstrated. An advanced flexible membrane of Nafion-Chlorophyll is synthesized by a facile synthesis procedure. Here, we examine the Nafion-Chlorophyll membrane as a supercapacitor and its performance is enhanced in the absence of light using three-electrode setup. The chlorophyll intercalated membrane electrodes depict a specific capacitance of 0.237 μ F c m - 2 when the light is just on from the dark and decreased to 0.15 μ F c m - 2 after 60 min of light exposure. Moreover, the membrane electrode also exhibits capacitive retention of 89.04% after 1000 cycles. Furthermore, the excellent efficiency of the Nafion-Chlorophyll membrane is observed in methanol and ethanol oxidation reactions (MOR and EOR) along with the current density of 10 and 9.43 μ A c m - 2 respectively. Thus, the fabricated flexible chlorophyll membrane shows huge proficiency in portable and flexible energy storage platforms. [ABSTRACT FROM AUTHOR]

In this paper, the bimetallic cathode material of cobalt vanadium organic framework (Bimetallic organic framework) is fabricated by facile hydrothermal method and heat treatment. The hollow spheric and porous surface containing tailored morphology of bimetallic MOF composite plays a pivotal role in energy storage application. That is efficaciously inherited from the base cobalt MOF imidazolate template. The electrochemical analysis delineated that the vanadium interpolated ZIF-67 MOF composite unveiled an augmented super capacitive performance. The as-obtained specific capacitance is 549 F/g at a 2 mV/s scan rate, and 349 F/g at 3 mA/cm2 applied current value. Furthermore, exceptional capacity retention of over 89% and 95% coulombic efficiency was obtained for the fabricated cathode material even after 5000 cycles. Combining biowaste-derived activated carbon with a Bimetallic Organic Framework, the asymmetric device of supercapacitor storage is fabricated. That device works on 0–1.4 V windows. The accomplished galvanometric capacitance is 151 F/g in the 4 mA current with the maximum specific energy of 42.6 Wh/kg and the specific power of 1399 W/kg and exhibited promising stability over 10000 cycles. These attained results affirm its proficient application as cathode material of supercapacitor devices. Write up The porous hollow-spheric Bimetallic organic framework and biowaste derive APCs are assembled in an asymmetric solid-state supercapacitor device that delineates the real-time application by analyzing it with an LED glowing circuit about a reasonable time that can replicate the feasibility of a real-time portable energy storage device. [ABSTRACT FROM AUTHOR]

The aim was to isolate, characterize, and explore potentials of gut bacteria from the earthworm (Metaphire posthuma) and imply these bacteria for remediation of Cu(II) and Zn(II). An extracellular polymeric substance (EPS) producing gut bacteria (Bacillus licheniformis strain KX657843) was isolated and identified based on 16S rRNA sequencing and phylogenetic analysis. The strain showed maximum tolerance of 8 and 6 mM for Cu(II) and Zn(II) respectively. It removed 34.5% of Cu(II) and 54.4% of Zn(II) at 25 mg L−1 after 72 and 96 h incubation respectively. The bacteria possessed a great potential to produce indole acetic acid (38.49 μg mL−1) at 5 mg mL−1L-tryptophan following 12 days incubation. The sterilized seeds of mung beans (Vigna radiata) displayed greater germination and growth under bacterium enriched condition. We observed that the bacterial strain phosphate solubilization ability with a maximum of 204.2 mg L−1 in absence of Cu(II) and Zn(II). Endowed with biosurfactant property the bacterium exhibited 24% emulsification index. The bacterium offered significant potential of plant growth promotion, Cu(II) and Zn(II) removal, and as such this study is the first report on EPS producing B. licheniformis KX657843 from earthworm which can be applied as powerful tool in remediation programs of Cu(II) and Zn(II) contaminated sites. [ABSTRACT FROM AUTHOR]

Water and soil pollution by toxic heavy metals (HMs) is increasing globally because of increase in population, industrialization and urbanization. It is a burning problem for the public, scientists, academicians and politicians how to tackle the toxic contaminants which jeopardize the environment. One possible solution for pollution abatement is a bioremediation-effective and innovative technology that uses biological systems for treatment of contaminants. Many bacteria synthesize indole-3-acetic acid (IAA) which is a product of l-tryptophan metabolism and belongs to the auxin class of plant growth-promoting hormone. The present study aimed at assessing the resistance pattern of wastewater bacteria against multiple HMs and plant growth promotion activity associated with IAA. A Gram-negative bacterial strain Pseudomonas aeruginosa KUJM was isolated from Kalyani Sewage Treatment Plant. This strain showed the potential to tolerate multiple contaminations such as As(III) (50 mM), As(V) (800 mM), Cd (8 mM), Co (18 mM), Cu (7 mM), Cr (2.5 mM), Ni (3 mM) and Zn (14 mM). The capability of IAA production at different tryptophan concentration (1, 2, 5 and 10 mg mL) was determined, and seed germination-enhancing potential was also estimated on lentil ( Lens culinaris). Such type of HM-resistant, IAA-producing and seed germination-enhancing P. aeruginosa KUJM offer great promise as inoculants to promote plant growth in the presence of toxic HMs, as well as plant inoculant systems useful for phytoremediation of polluted soils. Hence, P. aeruginosa KUJM finds significant applications in HM-contaminated poor agricultural field as well as in bioremediation of HM-contaminated wastewater system. [ABSTRACT FROM AUTHOR]