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Akhi A, Hasan A, Saha N, Howlader S, Bhattacharjee S, Dey K, Atique Ullah AKM, Bhuiyan FR, Chakraborty AK, Akhtar US, Shaikh MAA, Dey BK, Bhattacharjee S, Ganguli S. Ophiorrhiza mungos-Mediated Silver Nanoparticles as Effective and Reusable Adsorbents for the Removal of Methylene Blue from Water. ACS OMEGA 2024; 9:4324-4338. [PMID: 38313493 PMCID: PMC10831830 DOI: 10.1021/acsomega.3c05992] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 08/14/2023] [Revised: 12/23/2023] [Accepted: 12/29/2023] [Indexed: 02/06/2024]
Abstract
Green synthesis of silver nanoparticles (AgNPs) using a plant extract has attracted significant attention in recent years. It is found as an alternative for other physicochemical approaches because of its simplicity, low cost, and eco-friendly rapid steps. In the present study, Ophiorrhiza mungos (Om)-mediated AgNPs have been shown to be effective bioadsorbents for methylene blue (MB) dye removal (88.1 ± 1.74%) just after 1 h at room temperature in the dark from an aqueous medium for the first time. Langmuir and Freundlich isotherms fit the experimental results having the correlation coefficient constants R2 = 0.9956 and R2 = 0.9838, respectively. From the Langmuir fittings, the maximum adsorption capacity and adsorption intensity were found to be 80.451 mg/g and 0.041, respectively, indicating the excellent performance and spontaneity of the process. Taking both models under consideration, interestingly, our findings indicated a fairly cooperative multilayer adsorption that might have been governed by chemisorption and physisorption, whereas the adsorption kinetics followed the pseudo-second-order kinetics mechanism. The positive and low values of enthalpy (ΔH0 = 4.91 kJ/mol) confirmed that adsorption is endothermic and physical in nature; however, the negative free energy and positive entropy value (ΔS0 = 53.69 J/mol K) suggested that the adsorption is spontaneous. The biosynthesized adsorbent was successfully reused up to the fifth cycle. A proposed reaction mechanism for the adsorption process of MB dye onto Om-AgNPs is suggested. The present study may offer a novel finding such as an effective and sustainable approach for the removal of MB dye from water using biosynthesized Om-AgNPs as reusable adsorbents at a comparatively faster rate at a low dose for industrial applications.
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Affiliation(s)
- Aklima
A Akhi
- Department
of Applied Chemistry and Chemical Engineering, University of Chittagong, Chattogram 4331, Bangladesh
- Biomaterials
Research Laboratory (BRL), Department of Applied Chemistry and Chemical
Engineering, University of Chittagong, Chattogram 4331, Bangladesh
| | - Abid Hasan
- Department
of Applied Chemistry and Chemical Engineering, University of Chittagong, Chattogram 4331, Bangladesh
- Biomaterials
Research Laboratory (BRL), Department of Applied Chemistry and Chemical
Engineering, University of Chittagong, Chattogram 4331, Bangladesh
| | - Nakshi Saha
- Department
of Applied Chemistry and Chemical Engineering, University of Chittagong, Chattogram 4331, Bangladesh
- Biomaterials
Research Laboratory (BRL), Department of Applied Chemistry and Chemical
Engineering, University of Chittagong, Chattogram 4331, Bangladesh
| | - Sabbir Howlader
- Department
of Applied Chemistry and Chemical Engineering, University of Chittagong, Chattogram 4331, Bangladesh
- Biomaterials
Research Laboratory (BRL), Department of Applied Chemistry and Chemical
Engineering, University of Chittagong, Chattogram 4331, Bangladesh
| | - Sabonty Bhattacharjee
- Centre
for Advanced Research in Sciences (CARS), University of Dhaka, Dhaka 1000, Bangladesh
| | - Kamol Dey
- Department
of Applied Chemistry and Chemical Engineering, University of Chittagong, Chattogram 4331, Bangladesh
| | - A. K. M. Atique Ullah
- Nanoscience
and Technology Research Laboratory, Atomic Energy Center, Bangladesh Atomic Energy Commission, Dhaka 1000, Bangladesh
| | - Farhana Rumzum Bhuiyan
- Laboratory
of Biotechnology and Molecular Biology, Department of Botany, University of Chittagong, Chattogram 4331, Bangladesh
| | - Ashok Kumar Chakraborty
- Department
of Applied Chemistry and Chemical Engineering, Islamic University, Kushtia 7003, Bangladesh
| | - Umme Sarmeen Akhtar
- Bangladesh
Council of Scientific and Industrial Research (BCSIR), Dhanmondi, Dhaka 1205, Bangladesh
| | - Md. Aftab Ali Shaikh
- Bangladesh
Council of Scientific and Industrial Research (BCSIR), Dhanmondi, Dhaka 1205, Bangladesh
| | - Benu Kumar Dey
- Department
of Chemistry and Pro-Vice-Chancellor (Academic), University of Chittagong, Chattogram 4331, Bangladesh
| | - Samiran Bhattacharjee
- Centre
for Advanced Research in Sciences (CARS), University of Dhaka, Dhaka 1000, Bangladesh
| | - Sumon Ganguli
- Department
of Applied Chemistry and Chemical Engineering, University of Chittagong, Chattogram 4331, Bangladesh
- Biomaterials
Research Laboratory (BRL), Department of Applied Chemistry and Chemical
Engineering, University of Chittagong, Chattogram 4331, Bangladesh
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Fort H. Productivity vs. Evenness in the U.S. Financial Market: A Business Ecosystem Perspective. ENTROPY (BASEL, SWITZERLAND) 2023; 25:1029. [PMID: 37509976 PMCID: PMC10378340 DOI: 10.3390/e25071029] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/05/2023] [Revised: 06/30/2023] [Accepted: 07/05/2023] [Indexed: 07/30/2023]
Abstract
This paper starts by presenting an empirical finding in the U.S. stock market: Between 2001 and 2021, high productivity was achieved when the Shannon evenness-measuring the inverse of concentration-dropped. Conversely, when the Shannon evenness soared, productivity plunged. The same inverse relationship between evenness and productivity has been observed in several ecosystems. This suggests explaining this result by adopting the business ecosystem perspective, i.e., regarding the tangle of interactions between companies as an ecological network, in which companies play the role of species. A useful strategy to model such ecological communities is through ensembles of synthetic communities of pairwise interacting species, whose dynamics is described by the Lotka-Volterra generalized equations. Each community is specified by a random interaction matrix whose elements are drawn from a uniform distribution centered around 0. It is shown that the inverse relationship between productivity and evenness can be generated by varying the strength of the interaction between companies. When the strength increases, productivity increases and simultaneously the market evenness decreases. Conversely, when the strength decreases, productivity decreases and evenness increases. This strength can be interpreted as reflecting the looseness of monetary policy, thus providing a link between interest rates and market structure.
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Affiliation(s)
- Hugo Fort
- Institute of Physics, Faculty of Science, Universidad de la República, Montevideo 11400, Uruguay
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The Influence of Collaboration on Enterprises Internationalization Process. SUSTAINABILITY 2022. [DOI: 10.3390/su14052843] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
Abstract
At present, competitive globalized environments force enterprises to make more effort to both set up collaborative processes among networked partners and open their borders to the internationalization process. With this participation in internationalization processes, a set of barriers emerges that enterprises must overcome, particularly SMEs. The internationalization barriers are classified in four main dimensions, namely, strategy, technology, partners and product, which are considered to establish relationships between the internationalization and the collaborative processes. Accordingly, the research objective is to analyse the extent to which collaboration with international partners facilitates the internationalization process. A research survey was held with Spanish manufacturing SMEs to assess the internationalization of operations by establishing collaborative processes in global networks. Two surveys were conducted to analyse collaboration and internationalization concepts, and the influences among them: (i) a first survey, designed to validate the posed hypothesis about the relation between internationalization and setting up collaborative processes; (ii) a second survey, devised to perform a descriptive analysis that identifies less-applied collaborative processes in SMEs by establishing internationalization activities. The study results reveal that collaboration positively influences the internationalization process, and identifies the collaborative processes that are less performed among the partners that internationalize their operations.
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Assessment of Sustainable Collaboration in Collaborative Business Ecosystems. COMPUTERS 2021. [DOI: 10.3390/computers10120167] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
Abstract
Advances in information and communication technologies and, more specifically, in artificial intelligence resulted in more intelligent systems, which, in the business world, particularly in collaborative business ecosystems, can lead to a more streamlined, effective, and sustainable processes. Following the design science research method, this article presents a simulation model, which includes a performance assessment and influence mechanism to evaluate and influence the collaboration of the organisations in a business ecosystem. The establishment of adequate performance indicators to assess the organisations can act as an influencing factor of their behaviour, contributing to enhancing their performance and improving the ecosystem collaboration sustainability. As such, several scenarios are presented shaping the simulation model with actual data gathered from three IT industry organisations running in the same business ecosystem, assessed by a set of proposed performance indicators. The resulting outcomes show that the collaboration can be measured, and the organisations’ behaviour can be influenced by varying the weights of the performance indicators adopted by the CBE manager.
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Burch S, Di Bella J. Business models for the Anthropocene: accelerating sustainability transformations in the private sector. SUSTAINABILITY SCIENCE 2021; 16:1963-1976. [PMID: 34630728 PMCID: PMC8490843 DOI: 10.1007/s11625-021-01037-3] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 03/29/2021] [Accepted: 09/05/2021] [Indexed: 06/13/2023]
Abstract
The rapid pace and escalating severity of climate change impacts have made clear that current incremental approaches to pressing global socio-ecological challenges are insufficient to address the root causes of unsustainable development. This has spurred increasing interest in the dynamics of transformation: the actors, capacities and resources needed to fundamentally shift development paths. The private sector is at the core of essential transformative processes necessary to build a future premised on environmental integrity, social inclusivity, and resilience. The activities of the private sector are structured and driven by their underlying business model, which is at its core a set of assumptions about how a business creates, extracts and delivers value. Dominant conceptualizations of the business model remain a narrow imagining of how business interacts with societal processes and shape development patterns. In this article we call for the conceptualization and design of business models anchored in societal purpose and operating within planetary boundaries, apt for the Anthropocene. We identify five building blocks for business models where transdisciplinary sustainability research can accelerate entrepreneurial activity that fosters desirable sustainable pathways by enabling the creation of new capabilities in support of broader transformational processes. This article seeks to inform (and potentially re-orient the efforts of) transdisciplinary scholars engaging the private sector in the co-production of community-based sustainability and resilience-building initiatives. Likewise, the building blocks provide a guide for businesses who aim to deepen their capacity to build new partnerships, identify, and incorporate new information on climate risk into their operations and develop practices, sequences and procedures oriented toward the sustainable development goals and disaster resilience.
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