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Organic and Inorganic Nanoparticles from Agricultural Waste
Published in Sefiu Adekunle Bello, Hybrid Polymeric Nanocomposites from Agricultural Waste, 2023
Nanoparticles are particles with an average dimension or size distribution between 1 and 100 nm [1]. The advent of nanotechnology has improved manufacturing of several products with higher efficiency because of improved material properties [2]. Nanotechnology has been deployed in automobile, structural, medical, aeronautical, and energy applications. It is noteworthy to state that agricultural wastes have been utilised for providing feedstocks in most of these applications.
Nanoparticles of Marine Origin and Their Potential Applications
Published in Se-Kwon Kim, Marine Biochemistry, 2023
Fatemeh Sedaghat, Morteza Yousefzadi, Reza Sheikhakbari-Mehr
Reliable and environmentally friendly synthesis of metallic nanoparticles is a significant nanotechnology goal. Nanoparticles are synthesized by different chemical and physical methods. Several manufacturing techniques are in use that employ atomic, molecular, chemical, and particulate processing in a vacuum or liquid medium, but most of these techniques are expensive, as well as inefficient in materials and energy use. Therefore, second-generation nanotechnology is focused on clean technologies that minimize possible environmental and human health risks associated with manufacture and fabrication; there is an ever-growing demand for the development of clean, non-toxic, and environmentally benign synthesis procedures [Daniel and Astruc, 2004; Manivasagan and Kim, 2015].
Recent Advances in Nanofertilizer Development
Published in Sunil K. Deshmukh, Mandira Kochar, Pawan Kaur, Pushplata Prasad Singh, Nanotechnology in Agriculture and Environmental Science, 2023
Nanofertilizers are new-age fertilizers that can be used in lower dosages for slow/ controlled release of nutrients in comparison to bulk fertilizers (Reynolds, 2002; Batsmanova et al., 2013; Subramanian et al., 2015; Adisa et al., 2019). They thus enhance their efficacy in terms of plant growth and yield. The nanoparticles are synthesized using various physical and chemical processes. However, these processes are complex involving high temperature, pressure conditions along with the use of toxic chemicals thus making them harmful to the environment, whereas biological routes of synthesis are environment friendly as well as cost-effective. Biological entities have a unique potential to synthesize molecules with selective properties, thus becoming a potential tool for nanoparticles synthesis (Yadav et al., 2008). Biosynthesis has been carried out by exploiting various microbes and plant extracts (Bharde et al., 2008; Ghormade et al., 2011; Iravani et al., 2011; Mazumdar et al., 2011; Waghmare et al., 2011; Srivastava et al., 2012; Jayaseelan et al., 2012; Jain et al., 2013; Byrne et al., 2014; Sarkar et al., 2014; Singh et al., 2014; Panpatte et al., 2016; Bedi et al., 2018a; 2018b; Rajesh et al., 2018).
Investigating the EKC hypothesis with nanotechnology, renewable energy consumption, economic growth and ecological footprint in G7 countries: panel data analyses with structural breaks
Published in Energy Sources, Part B: Economics, Planning, and Policy, 2023
Mucahit Aydin, Pınar Koc, Kadriye Izgi Sahpaz
In the literature, although it is mainly that nanotechnology reduces environmental degradation by increasing energy efficiency and savings and using renewable energy by providing cost advantage in production, there are also studies stressing that nanoparticles emissions can negatively affect human and environmental health (Pokrajac et al., 20021). Nanoparticles can have toxic effects on human and environmental health. Nanomaterials can also cause air and water pollution, which is too small to be detected easily, making nano pollution another man-made new environmental impact (Gavrilescu et al. 2018; Wright 2016). Toxicities such as Cadmium and Colloids originating from nanoparticles have the property of spreading pollution. But, the net effects of nanoparticles on environmental pollution have not been revealed yet (OECD 2016; UBA 2006). In this context, this study attempts to answer two main questions. First, how do nanotechnological innovations affect environmental degradation in G7 countries? Second, do nanotechnological innovations impress the validity of the EKC hypothesis in G7 countries? Analyzing the effects of nanotechnology on environmental quality is essential to increase the efficiency of green economy policies. In this context, this study is expected to contribute significantly to the literature.
Antibiofilm and cytotoxic potential of extracellular biosynthesized gold nanoparticles using actinobacteria Amycolatopsis sp. KMN
Published in Preparative Biochemistry & Biotechnology, 2023
Faezeh Kabiri, Seyyed Soheil Aghaei, Ahmad Ali Pourbabaee, Mohammad Soleimani, Tahereh Komeili Movahhed
We used the DSL study to characterize the size scattering of the particles suspended in a liquid. The average size of biosynthesized AuNPs was 44.4 nm, suggesting that this bacterial strain has the potential to synthesize the middle size particle. The toxicity of nanoparticles is often affected by their physicochemical features, e.g., particle size, surface characteristics, and shape. The smaller nanoparticles have a larger surface area and a higher percentage of molecules exposed on the particle surface to interact with cells.[44] Khadivi et al. have implied the extracellular biosynthesis of AuNPs using Streptomyces griseus with a spherical shape and an average size of 50 nm.[45] Analysis of polydispersity index (PDI) revealed 0.201, indicating a nanoparticle distribution pattern in an aqueous environment. The analysis of zeta potential was performed to identify the steadiness of nanoparticles synthesized in colloidal solution, and particles with zeta potential value closer to −30 mV denote that synthesized nanoparticles are more stable because of the electrostatic repulsion between the negatively charged particles in the solution.[46] In this study, the zeta potential value of biosynthesized AuNPs incubated with isolated actinobacterial extracellular components was −1.3 mV, implying the moderate steadiness of the Au.
A review on synthesis and applications of versatile nanomaterials
Published in Inorganic and Nano-Metal Chemistry, 2022
G. N. Kokila, C. Mallikarjunaswamy, V. Lakshmi Ranganatha
Nanotechnology is being developed in several forms: materials (e.g., powders/dispersions), coatings, (nano grained) monoliths, polymer–ceramic composites, devices, and systems.[11] Nanoparticles have many advantages over the bulk materials as nanoparticles can be synthesized on-site, not labor-intensive, various sizes and shapes are produced, easy to handle and store, helps in long-term preservation, works quickly and effectively, removes all pollutant types, intensively they can permanently remove the wastes, effortlessly nanoparticles disseminate in water usually without any change in their physicochemical properties, nanomaterials can revolutionize a lot of electronic products, procedures, and applications. Nanoparticles are used as a catalyst in many organic reactions.[12] Nanoparticles have many applications in various fields like electronics, medicinal industries, catalysis, energy harvesting, food processing, environmental remediation, biosensors, and biological agents.[13,14]