Sandeep Panda

Gujarat Biotechnology University · Industrial Biotechnology

Pyrite ash, a waste by-product formed during roasting of pyrite ores, is a good source of valuable metals. The waste is associated with several environmental issues due to its dumping in sea and/or land filling. Although several other management practices are available for its utilization, the waste still awaits and calls for an eco-friendly biotec...

Chalcopyrite is the primary copper mineral used for production of copper metal. Today, as a result of rapid industrialization, there has been enormous demand to profitably process the low grade chalcopyrite and "dirty" concentrates through bioleaching. In the current scenario, heap bioleaching is the most advanced and preferred eco-friendly technol...

In the current era, the alarming rate at which coal is being burned as a fuel is causing concern with regard to the release of sulphur oxides. According to reports, global coal consumption has increased by 0.4% in 2014. While countries like UK, Ukraine etc. have witnessed a decline in coal consumption, some others like India, China, Africa and Nort...

Acid mine drainage (AMD) is recognised as a serious and global environmental problem. The major producer of these toxic effluents is the mining industry. Owing to the severe effects of these effluents, their prevention and treatment have been a primary focus of research over several decades. The problems have invited the attention of a large group...

Microbe–mineral interactions are very pervasive in nature. Since coal is a chief source of nonrenewable energy and finds its application in a wide variety of sectors, the importance of microbe–mineral interaction is indispensible for developing a sustainable microbial coal biotechnology. The underlying necessity of microbe–mineral interaction is al...

In the present study, a sustainable production of boric acid from colemanite mineral and sulfuric acid was investigated, considering waste treatment and colemanite mineral processing costs. The purchasing price of sulfuric acid and the selling price of boric acid obtained from the market were used as $50/t and $900/t, respectively, to perform the s...

Mineral biotechnological applications e.g. bioleaching and bio-beneficiation, for waste treatment and resource recovery have invited due attention owing to their economic and eco-friendly benefits in comparison to the conventional methods. Although research has progressed well, there are several aspects that are still not well understood and requir...

Developed economies such as the USA and European Union (EU) have classified antimony as a critical raw material. China leads the global antimony production (67% on an average from 2015 to 2019) followed by Russia and Tajikistan. Antimony has been applied in the industry (plastics, etc.) and new/emerging technologies (cell panels, infrared, etc.) wh...

There is a growing interest in electronic wastes (e-wastes) recycling for metal recovery because the fast depletion of worldwide reserves for primary resources is gradually becoming a matter of concern. E-wastes contain metals with a concentration higher than that present in the primary ores, which renders them as an apt resource for metal recovery...

Waste cooking oil (WCO) is generated when edible vegetable oil is used for frying food items. Inappropriate disposal of WCO exacerbates environmental pollution, block drains and contaminates terrestrial and aquatic habitats while its consumption deleteriously impacts human and animal health. In this review, the current efforts into the biotechnolog...

Of late, sustainable energy development has received considerable importance throughout the world due to the growing concerns regarding climate change and environment protection. This in turn, has led to the search for alternatives, which are ecofriendly and cost-effective. Turkey possesses vast resources of lignite and renewable energies, which if...

Halophiles have been used as bioremediation agents in degradation of organic pollutants and acidophilic microorganisms are considered as efficient metal leaching agents for mineral-metal bearing wastes. In the present study, halophilic bacteria (Bacillus tequilensis CH) and a mixed culture of acidophilic bacteria were used for their visual detectio...

In this study, the effect of graphite on sphalerite dissolution was investigated using a Leptospirillum ferrooxidans (L. ferrooxidans) dominated meso-acidophilic bacterial consortium. Results of the studies indicated that Zn dissolution enhanced from 18.75% (in control tests) to 78.46% (using L. ferrooxidans) without graphite in the system (the con...

The growing demand for rare earth elements (REEs) confronted with a parallel supply risk, draws major interest to utilize secondary resources bearing higher REE content than the primary resources. The European Commission has recently identified bauxite as a Critical Raw Material (CRM). In particular, unexploited bauxite residues have invited due at...

The global demand for rare earth elements (REEs) with respect to hi‐tech applications is on a constant rise; however, their supply is a matter of concern. To the rescue, the urban wastes e.g. the consumer electronic scraps (CE‐Scraps) are seen to have a remarkable potential to meet the growing demand for metals. In line with the circular economy pr...

Bioleaching of copper from electronic waste (e-waste) in the form of high grade waste printed circuit boards (WPCBs) collected from obsoletemobile phones is assessed using a consortium of iron (Fe2+) & sulphur (Sº) oxidizing bacteria in a semi-pilot reactor system. Results from the study indicated that the microorganisms were able to grow in the pr...

Globally many countries face major socio-economic and political challenges that include climate change, energy supply and availability of critical resources. Metals are essential to the products and modern technologies that will allow all economies (either developed or developing), a transition into the low carbon future. Technology metals, that in...

The pandemic has temporarily closed mines, factories and borders and destabilized flows of cobalt, lithium and more — metals that are crucial for batteries, wind turbines and solar panels.

Agricultural, domestic and industrial activities contribute in releasing several organic and inorganic substances into the water streams that result in environmental pollution. Biological treatment of industrial and domestic wastewater using Activated Sludge Nutrient Removal (ASNR), the conventional process, is well known; however, it is relatively...

This book includes over three hundred and seventy-five short papers presented during the second EMCEI, which was held in Sousse, Tunisia in October 2019. After the success of the first EMCEI in 2017, the second installment tackled emerging environmental issues together with new challenges, e.g. by focusing on innovative approaches that contribute t...

Mineralogically distinct coal samples respond differentially to microbial attack. In the present study, a mixed meso-acidophilic bacterial consortium predominantly comprising of Acidithiobacillus ferrooxidans strain was investigated for its biodesulphurization abilities for three distinct sulphur bearing samples (Goa CPC, Rajasthan Lignite, Assam C...

BACKGROUND: The waste printed circuit boards (WPCBs), today, offer a wide array of metals and are of great importance because their metal concentration is much more than that in the ores. Largely, studies have been devoted to Cu bioleaching from WPCBs because it has the highest ratio among all metallic elements ( ̴ 10-30%). In the present study, an...

Ferrous fractions in incinerated bottom ash (IBA) are linked to lower metal dissolution. In the present study, a novel eco-friendly biotechnological approach has been tested for multi-metal leaching using meso-acidophilic Fe²⁺/S° oxidizing bacterial consortium from magnetically separated IBA, owing to the inherent property of IBA to release Fe²⁺. C...

The present study investigates the influence of ferrous iron (as FeSO4) and ferric iron (as Fe2 (SO4)3), and pyrite (FeS2) on the ability of bacterial leaching of a high-grade sulfide Zn–Pb ore. In this regard, shake flask experiments were carried out at 5% (w/v) pulp density of the ore sample (having 40.7% Zn and 12.4% Pb initial metal content) us...

Critical raw materials (CRMs) are essential in the development of novel high-tech applications. They are essential in sustainable materials and green technologies, including renewable energy, emissionfree electric vehicles and energy-efficient lighting. However, the sustainable supply of CRMs is a major concern. Recycling end-of-life devices is an...

This paper presents the application of an artificial neural network (ANN) in order to predict the effects of operational parameters on the dissolution of Cu, Mo and Re from molybdenite concentrate through meso-acidophilic bioleaching. The initial pH, solid concentration, inoculum percent and time (days) were used as inputs to the network. The outpu...

Bio-hydrometallurgical applications have been receiving more attention globally for processing of several metal bearing wastes. Compared to the conventional methods, bioleaching has proved to be a more effective way in treating low-grade ores, due to its economic and ecofriendly advantages. Developments in bioleaching enables this technique to be u...

ABSTRACT The by-products of zinc refineries are used as the primary mineral resources for the commercial production of indium. The discarded LCDs containing adequate amount of indium is rather worth as its secondary resources compared to the by-products of zinc refineries. Mining and recycling rates of indium, respectively from minerals and waste L...

Turkey is a country with vast lignite reserves, which can serve as a potential source of energy to meet the rising energy demands. However, the sulphur present in coal delimits its application in several sectors. Recently, various techniques have emerged for sulphur removal from coal. In the present study, the efficacy of Rhodococcus erythropolis D...

Coal has been serving as a profuse source of energy since centuries and several attempts are being made to reduce sulphur emission levels from coal. Recently, pretreatment techniques such as ultrasonication and utilization of surfactants as additives have surfaced aiming at improving the biodesulphurization of coal. In the present study, biodesulph...

The low rank coal lignite stands out to be a profuse source of energy in Turkey and accounts for nearly 43% of its total fossil fuel production. However, the high sulfur content associated with lignite averts its application in several sectors due to various health and environmental issues. In the present work, biodesulphurization of Turkish lignit...

Simultaneous multi-metal leaching from industrial pyrite ash is reported for the first time using a novel bioreactor system that allows natural diffusion of atmospheric O2 and CO2 along with the required temperature maintenance. The waste containing economically important metals (Cu, Co, Zn & As) was leached using an adapted consortium of meso-acid...

Bioleaching is an advantageous tool to process wastes either both from primary and secondary sources for metal recovery. The process is considered as an eco-friendly and economic technology. Today, the most preferred methodology for recovery of metal values from low-grade ores is heap bio¬leaching technology coupled with solvent extraction (SX) and...

A native isolate, 9C, identified as Rhodococcus ruber (Genbank Accession number – KY029073) was studied for dibenzothiophene degradation and subsequent bio-desulphurization of three different sulphur bearing materials (NE coal containing organic sulphur; lignite containing pyritic sulphur and a calcined petroleum-coke) of Indian origin. The isolate...

One of the most applied biological treatment method for domestic and industrial waste water treatment is the conventional activated sludge nutrient removal process. Although the conventional treatment methods are simple and have relative importance, they are rather expensive and require higher energy inputs. Algal waste water treatment is however,...

The kitchen refuse evaluated for biomethane showed a potential of 32l/kg dry wt. with the highest percent methane content of 63, demonstrating kitchen refuse as a good biomethanation candidate. Physical factors like, texture, size and the substrate proximates affect biomethanation. A 50 μm resolution SEM degradation pattern study gave a micro-level...

Dumping of poor but metal containing industrial waste is associated with several environmental issues. Exposure of these wastes to the natural environment offers serious concerns for the mineral processing industries to utilize them for metal recovery and check environmental pollution. In the present study, a novel sequential bioreduction-bioleachi...

The nickeliferous Chromite overburden (COB) awaits a suitable technology to extract the obstinate nickel ingrained in its goethite matrix. In the present study, a novel Bio-Reduction Acid Leaching (BRAL) approach has been proposed using dissimilatory iron reducing bacteria (DIRB) which is inherently capable of transforming iron mineral phases via b...

A variety of low-grade ore deposits such as copper, nickel, gold, uranium and others available throughout the world are dumped as wastes due to the unsuitability of conventional methods of metal recovery. As a result of the gradual depletion of the oxide as well as the high-grade ore deposits, particular concern is being raised to process the low-g...

Dumping of low-grade chalcopyrite encompasses several environmental problems. Despite slow dissolution rate, meso-acidophilic bioleaching is preferred for the extraction of copper from such ores. In the present study, meso-acidophilic bioleaching of a low-grade chalcopyrite in presence of an acid-processed waste newspaper (PWp) is discussed for the...

Features: 1.Provides comprehensive coverage of varied aspects of biohydrometallurgy, biomineral processing, biomining, biosynthesis, and bioremediation in a single volume 2. Explains the imperative importance of bacteria in minerals and the metals sector 3. Contains equal coverage of theory and explanations with input from contributors around the...

The advances in the area of applied and industrial microbial biotechnology have opened up many new avenues for application of several microorganisms in the industrial sector. A group of certain metal reducers such as the Dissimilatory Iron Reducing Microorganisms possess an inherent potential to reduce oxidized metals under strict anaerobic/faculta...

Over the past few years, the applications of certain microorganisms have gained importance in the field of applied environmental microbiology. Amongst them, biomineral processing is such field that deals with metal mining from ores, concentrates, industrial wastes, overburdens etc. under the impact of microorganisms and/or their metabolites. The mo...

Copper slag was subjected to in-depth mineralogical characterization by integrated instrumental techniques and evaluated for the efficacy of physical beneficiation and mixed meso-acidophilic bioleaching tests towards recovery of copper. Point-to-point mineral chemistry of the copper slag is discussed in detail to give better insight into the associ...

Over the past few decades, the upcoming scientific scenario of the ever growing area of biotechnology finds a successful application of some eco-diversified microorganisms which are employed for the recovery of metals from ores and other industrial wastes. A lot of mineral oxidizers and reducers are found in natural environments which involve a dif...

New research on Chemical Engineering is the subject of a report. According to news reporting originating from Baripada, India, by VerticalNews correspondents, research stated, "Bioleaching studies for chalcopyrite contained ball mill spillages are very scarce in the literature. We developed a process flow sheet for the recovery of copper metal from...

Recent Findings from S. Panda and Co-Authors Provide New Insights into Chemical Engineering By a News Reporter-Staff News Editor at Journal of Engineering --New research on Chemical Engineering is the subject of a report. According to news reporting originating from Baripada, India, by VerticalNews correspondents, research stated, "Bioleaching stu...

Bioleaching studies for chalcopyrite contained ball mill spillages are very scarce in the literature. We developed a process flow sheet for the recovery of copper metal from surface activated (600 A degrees C, 15 min) ball mill spillage through bio-hydrometallurgical processing route. Bioleaching of the activated sample using a mixed meso-acidophil...

Biomineral processing is a field of metal mining from ores, concentrates, rocks and solutions under impact of microorganisms and/or their metabolites. Most successful application of mineral biotechnology, so far is on copper, uranium and gold ores. Various physicochemical parameters, such as the biomass, availability of CO2, particle size, mineralo...

Heap bioleaching technology is favoured by most of the industries today for the extraction of metals such as copper, gold, nickel, uranium from low or lean grade ores. Recently many commercial bioleaching plants are in operation throughout the world. The use of certain acidophilic microorganisms such as thoese of the A. ferrooxidns, L. ferrooxidans...

Two step meso-acidophilic bioleaching of chalcopyrite containing ball mill spillage and removal of the surface passivation layer. Bioresour Technol; 2013 Feb;130:332-8 PMID: 23313677 the following section is the top 20 articles published on the same topic since you published yours.

The effect of an adapted Dissimilatory Iron Reducing bacterial consortium (DIRB) towards bio-reduction of Sukinda Chromite overburden (COB) with enhanced recovery of nickel and cobalt is being reported for the first time. The remarkable ability of DIRB to utilize Fe (III) as terminal electron acceptor reducing it to Fe (II) proved beneficial for tr...