Search results for: Gopinath Halder

Items from 1 to 20 out of 35 results

article

Elucidation of preferential elimination of Cr(VI) via bioinspired adsorbents: a comparative assessment

Soumya Banerjee, Sanghamitra Barman, Gopinath Halder

Environmental Earth Sciences > 2019 > 78 > 4 > 1-22

The present study investigates uptake of Cr(VI) from synthetic metal solution by superheated steam-activated biochar (SABC) made from roots of Colocasia esculenta and synthetic zeolite (ZRHA) prepared from rice husk ash under the influence of pH (1–7), adsorbent dose (1–100 mg/L), initial Cr(VI) concentration (5–190 mg/L), temperature (15–55 °C), agitation speed (100–170 rpm) for a contact time of...

article

Effect of Rice Husk Derived Nanosilica on the Structure, Properties and Biodegradability of Corn-Starch/LDPE Composites

Deepshikha Datta, Gopinath Halder

Journal of Polymers and the Environment > 2019 > 27 > 4 > 710-727

Development of material with enhanced mechanical properties and biodegradability by the incorporation of synthesized inorganic nanostructured mesoporous silica from rice husk has been investigated. The produced nanosilica (≈ 25 nm and 213.045 m²/g surface area) and nanosilica blended LDPE/starch composites were extensively characterised by SEM, FTIR, XRD, XRF, TEM, EDAX and TGA analysis. The low cost...

article

Comparative assessment of the fluoride removal capability of immobilized and dead cells of Staphylococcus lentus (KX941098) isolated from contaminated groundwater

Shraboni Mukherjee, Priyanka Sahu, Gopinath Halder

Environmental Progress & Sustainable Energy > 37 > 5 > 1573 - 1586

A microbial treatment of fluorinated aqueous solution was performed by using a novel bacterial strain isolated from fluoride‐loaded groundwater. Defluoridation efficiencies of two forms viz. immobilized live cells and dead biomass of the isolate were investigated by means of a series of batch studies. Initial fluoride concentration (1–25 mg L⁻¹), pH (5–9), bead numbers (5–30), agitation speed (100–240...

article

A comparative study on defluoridation capabilities of biosorbents: isotherm, kinetics, thermodynamics, cost estimation, and eco-toxicological study

Shraboni Mukherjee, Sujata Dutta, Sourjya Ray, Gopinath Halder

Environmental Science and Pollution Research > 2018 > 25 > 18 > 17473- 17489

The present study aims towards fluoride remediation from synthetic water using steam-activated carbon of Aegle marmelos (bael shell/wood apple) (BAC) and Parthenium hysterophorus (PHAC) according to batch sorption techniques. The impact of different parametric conditions viz. initial fluoride concentration (4–12 mg/L), time (0–5 h), temperature (293.15–333.15 K), adsorbent dosage (4–14 g/L), pH (4–9),...

article

Insight into Optimization, isotherm, kinetics, and thermodynamics of fluoride adsorption onto activated alumina

Sumit H. Dhawane, Anoar Ali Khan, Kiran Singh, Ajay Tripathi, more

Environmental Progress & Sustainable Energy > 37 > 2 > 766 - 776

Investigation of essential technique to diminish the exceeded limit of fluoride in groundwater is the need of the hour due to severe adverse effects of fluoride on human health. The present study highlights the prospective of activated alumina, a defluoridating agent for the elimination of excess fluoride (F⁻) concentration from aqueous solution by using batch adsorption techniques. The adsorptive...

article

A review on the sorptive elimination of fluoride from contaminated wastewater

Shraboni Mukherjee, Gopinath Halder

Journal of Environmental Chemical Engineering > 2018 > 6 > 1 > 1257-1270

Biosorption is considered to be one of the favourable remediation techniques for fluoride removal from aqueous solutions. Other conventional techniques such as precipitation, reverse osmosis, ion exchange, nanofiltration etc, have several demerits such as huge initial costs, higher electricity consumption, generation of sludge, etc. The process of biosorption has become an economically feasible and...

article

Methanogenesis of organic wastes and their blend in batch anaerobic digester: Experimental and kinetic study

Ranjana Rathaur, Sumit H. Dhawane, Amit Ganguly, Mrinal Kanti Mandal, more

Process Safety and Environmental Protection > 2018 > 113 > C > 413-423

The scarcity of the fossil fuels and increasing energy demand urges the production of sustainable source of energy. The uncontrolled generation of wastes and their easy accessibilities gained a significant attention towards its use for the synthesis of renewable energy like biomethane. In order to cope up with the energy demand and urgency of alternative non-conventional energy source, the present...

article

Microbial remediation of fluoride-contaminated water via a novel bacterium Providencia vermicola (KX926492)

Shraboni Mukherjee, Priyanka Sahu, Gopinath Halder

Journal of Environmental Management > 2017 > 204 > P1 > 413-423

The present study emphasizes on the isolation, identification and characterization of a fluoride-resistant bacteria from contaminated groundwater of a severely affected rural area. The isolate was investigated for its possible role towards bioremediation of fluoride. Bacterial growth was determined by various carbon and nitrogen sources. Influence of parameters like initial fluoride concentration...

article

Carbon dioxide bio-fixation by Chlorella sp. BTA 9031 towards biomass and lipid production: Optimization using Central Composite Design approach

Madhumanti Mondal, Ashmita Ghosh, K. Gayen, Gopinath Halder, more

Journal of CO 00002 Utilization > 2017 > 22 > C > 317-329

Depletion in the fossil fuel reserves and the unceasing rise in the greenhouse gas emissions due to excessive use of fossil fuels has become a subject of worldwide concern. Production of microalgal biomass using the carbon dioxide (CO₂) laden flue gas is identified as one of the potent solutions to the trap the excessive emissions of CO₂ from entering into the atmosphere along with the production...

article

Insight into preparation of activated carbon towards defluoridation of waste water: Optimization, kinetics, equilibrium, and cost estimation

Avinash V. Palodkar, Kumar Anupam, Soumya Banerjee, Gopinath Halder

Environmental Progress & Sustainable Energy > 36 > 6 > 1597 - 1611

The present investigation highlights the optimization of preparation conditions of activated carbon developed from Cocos nucifera towards fluoride removal from wastewater. Activated carbon was prepared through chemical activation using phosphoric acid (H₃PO₄). Central composite design (CCD) was used to examine the effect of three variables: H₃PO₄ concentration, carbonization temperature and time on...

article

Biochemical characterization of microalgae collected from north east region of India advancing towards the algae‐based commercial production

Ashmita Ghosh, Saumyakanti Khanra, Madhumanti Mondal, Thingujam Indrama Devi, more

Asia‐Pacific Journal of Chemical Engineering > 12 > 5 > 745 - 754

Selection of suitable strain of microalgae is the crucial factor for large‐scale production of algae‐based products. Efforts have been made here for isolation, identification and biochemical characterization of five microalgae strains collected from Tripura (a small state in north‐eastern region of India). Two Chlorococcum sp. (NITAAP008 and NITAAP019) demonstrate their high lipid (15–24%), equal...

article

Effect of macronutrient supplements on growth and biochemical compositions in photoautotrophic cultivation of isolated Asterarcys sp. (BTA9034)

Ashmita Ghosh, Saumyakanti Khanra, Madhumanti Mondal, Gopinath Halder, more

Energy Conversion and Management > 2017 > 149 > C > 39-51

Asterarcys sp. has been isolated from the forest area of Tripura, India, which is a part of biodiversity hotspot under the north east region of India and remains largely unexplored. In this study, we have identified the isolated algae strain by rRNA sequence analysis. For the first time, ultrastucture morphology with surface elemental analysis of this strain was revealed in this study. In addition,...

article

Influence of carbon sources and light intensity on biomass and lipid production of Chlorella sorokiniana BTA 9031 isolated from coalfield under various nutritional modes

Madhumanti Mondal, Ashmita Ghosh, O.N. Tiwari, K. Gayen, more

Energy Conversion and Management > 2017 > 145 > C > 247-254

Microalgae are claimed to be the most promising non-food based feedstock for generation of biofuels. However, achieving a high total lipid content with photoautotrophic culture is still challenging. Hence, a viable method to enhance the algal biomass and target product is to observe growth of microalgae under heterotrophic or mixotrophic conditions. In the current study the influence of light and...

article

Biosorptive uptake of arsenic(V) by steam activated carbon from mung bean husk: equilibrium, kinetics, thermodynamics and modeling

Sandip Mondal, Kaustav Aikat, Gopinath Halder

Applied Water Science > 2017 > 7 > 8 > 4479-4495

The present investigation emphasizes on the biosorptive removal of toxic pentavalent arsenic from water using steam activated carbon prepared from mung bean husk (SAC-MBH). Characterization of the synthesized sorbent was done using different instrumental techniques, i.e., SEM, BET and point of zero charge. Sorptive uptake of As(V) over steam activated MBH as a function of pH (3–9), agitation speed...

article

Parametric optimization of biodiesel synthesis from rubber seed oil using iron doped carbon catalyst by Taguchi approach

Sumit H. Dhawane, Akash Pratim Bora, Tarkeshwar Kumar, Gopinath Halder

Renewable Energy > 2017 > 105 > C > 616-624

Improvisation of the biodiesel production by employing heterogeneous catalyst and its optimization is the best way to mitigate the growing concern with the traditional feedstocks and their prices. The present study is aimed at optimizing the biodiesel production process and identifying significant parameters affecting the biodiesel yield. The biodiesel is synthesized from rubber seed oil (RSO) using...

article

Optimizing ranitidine hydrochloride uptake of Parthenium hysterophorus derived N-biochar through response surface methodology and artificial neural network

Sandip Mondal, Kaustav Aikat, Kumar Siddharth, Krishna Sarkar, more

Process Safety and Environmental Protection > 2017 > 107 > C > 388-401

The present study investigated the feasibility of utilizing Parthenium hysterophorus derived activated N-biochar (PH-ANB) as a potential low cost adsorbent for the effective removal of micro-pollutant and water-soluble cationic pharmaceutical ranitidine hydrochloride (RH) from simulated aqueous system. The structural characteristic features of PH-ANB were analysed using FTIR, SEM, BET and point of...

article

Elucidation of the sorptive uptake of fluoride by Ca2+-treated and untreated algal biomass of Nostoc sp. (BTA394): Isotherm, kinetics, thermodynamics and safe disposal

Shraboni Mukherjee, Madhumanti Mondal, Soumya Banerjee, Gopinath Halder

Process Safety and Environmental Protection > 2017 > 107 > C > 334-345

The present study explores the sorption mechanism of fluoride from aqueous solution on to live biomass of Nostoc sp. (BTA394). Adsorptive efficiency of the algal biomass both as Ca²⁺-treated and without Ca²⁺-treatment were studied in varying fluoride concentration. The influence of several parameters like initial fluoride concentration (5–20mg/L), time (0–14h), temperature (283.15–303.15K) and calcium...

article

Free radical induced grafting of acrylonitrile on pre-treated rice straw for enhancing its durability and flame retardancy

Aparna Mukherjee, Seema Halder, Deepshikha Datta, Kumar Anupam, more

Journal of Advanced Research > 2017 > 8 > 1 > 73-83

The present investigation highlights the feasibility of a polymer grafting process to enhance the durability and flame retardancy of rice straw towards application as a low cost roofing material. The success of this grafting methodology was perceived to depend upon a bi-step pre-treatment process encompassing delignification and inorganic salts dispersion. Subsequently free radical polymer grafting...

article

Insight into Cr6+ reduction efficiency of Rhodococcus erythropolis isolated from coalmine waste water

Soumya Banerjee, S.R. Joshi, Tamal Mandal, Gopinath Halder

Chemosphere > 2017 > 167 > C > 269-281

A microbial treatment of Cr⁶⁺ contaminated wastewater with a chromium reducing bacteria isolated from coal mine area was investigated. In a series of batch study metal removal was executed under different parametric conditions which include pH (2–7), temperature (20–50 °C), initial Cr⁶⁺ concentration (1–100 mg/L), substrate utilization and its overall effect on biomass generation. Impact of oxygen...

article

Thermodynamics, kinetics and modeling of sorption behaviour of coalbed methane – A review

Sujoy Chattaraj, Debadutta Mohanty, Tarkeshwar Kumar, Gopinath Halder

Journal of Unconventional Oil and Gas Resources > 2016 > 16 > C > 14-33

The gradual depletion of the conventional energy reserves and ever growing energy demand has been the matter of global concern over the last few decades. Shrinking coal and petroleum resources have posed researchers to look for exploration and exploitation of unconventional gas resources. In this scenario, natural gas is not only a promising alternative solution towards mitigation of energy crisis...

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INFONA - science communication portal

Search results for: Gopinath Halder

Elucidation of preferential elimination of Cr(VI) via bioinspired adsorbents: a comparative assessment

Effect of Rice Husk Derived Nanosilica on the Structure, Properties and Biodegradability of Corn-Starch/LDPE Composites

Comparative assessment of the fluoride removal capability of immobilized and dead cells of Staphylococcus lentus (KX941098) isolated from contaminated groundwater

A comparative study on defluoridation capabilities of biosorbents: isotherm, kinetics, thermodynamics, cost estimation, and eco-toxicological study

Insight into Optimization, isotherm, kinetics, and thermodynamics of fluoride adsorption onto activated alumina

A review on the sorptive elimination of fluoride from contaminated wastewater

Methanogenesis of organic wastes and their blend in batch anaerobic digester: Experimental and kinetic study

Microbial remediation of fluoride-contaminated water via a novel bacterium Providencia vermicola (KX926492)

Carbon dioxide bio-fixation by Chlorella sp. BTA 9031 towards biomass and lipid production: Optimization using Central Composite Design approach

Insight into preparation of activated carbon towards defluoridation of waste water: Optimization, kinetics, equilibrium, and cost estimation

Biochemical characterization of microalgae collected from north east region of India advancing towards the algae‐based commercial production

Effect of macronutrient supplements on growth and biochemical compositions in photoautotrophic cultivation of isolated Asterarcys sp. (BTA9034)

Influence of carbon sources and light intensity on biomass and lipid production of Chlorella sorokiniana BTA 9031 isolated from coalfield under various nutritional modes

Biosorptive uptake of arsenic(V) by steam activated carbon from mung bean husk: equilibrium, kinetics, thermodynamics and modeling

Parametric optimization of biodiesel synthesis from rubber seed oil using iron doped carbon catalyst by Taguchi approach

Optimizing ranitidine hydrochloride uptake of Parthenium hysterophorus derived N-biochar through response surface methodology and artificial neural network

Elucidation of the sorptive uptake of fluoride by Ca2+-treated and untreated algal biomass of Nostoc sp. (BTA394): Isotherm, kinetics, thermodynamics and safe disposal

Free radical induced grafting of acrylonitrile on pre-treated rice straw for enhancing its durability and flame retardancy

Insight into Cr6+ reduction efficiency of Rhodococcus erythropolis isolated from coalmine waste water

Thermodynamics, kinetics and modeling of sorption behaviour of coalbed methane – A review

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