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Topic Review
Electrocatalytic Reactions for Converting CO2 to Value-Added Products
Carbon dioxide (CO2) emissions are an important environmental issue that causes greenhouse and climate change effects on the earth. Nowadays, CO2 has various conversion methods to be a potential carbon resource, such as photocatalytic, electrocatalytic, and photo-electrocatalytic. CO2 conversion into value-added products has many advantages, including facile control of the reaction rate by adjusting the applied voltage and minimal environmental pollution. The development of efficient electrocatalysts and improving their viability with appropriate reactor designs is essential for the commercialization of this environmentally friendly method.
  • 280
  • 28 Jun 2023
Topic Review
Electrodialysis Bipolar Membrane for Reverse-Osmosis Concentrate Recovery
Electrochemical processes such as electrodialysis (ED) and electrodialysis bipolar membrane (EDBM) can contribute to soft-water production and the evaluation of waste fluxes. EDBM is a new technology that combines the separation function of electrodialysis with water separation at the bipolar membrane interface, which can convert salts into corresponding acids and bases without adding external components. In this system, anions and cations are separated from wastewater separately and combined with H+ and OH− ions via bipolar membranes to form acidic and alkaline solutions.
  • 993
  • 14 Jan 2022
Topic Review
Electromagnetic Fields Exposure
In different situations, electromagnetic fields (EMF) are consumed every day in several sociable purposes. Additionally, they are employed securely in medical treatments. Conversely, when these fields are operated inadvertently, it can crop unfavorable outcomes. These consequences are intimately linked to the type of the EMF and the exposed substance. The strength of the field as well as its frequency typify EMF, whereas the physical and geometric properties describe matter.
  • 196
  • 10 Jul 2023
Topic Review
Electronic Nose and Traditional Methods of Ammonia Detection
Ammonia (NH3) represents a perilous gas that poses a substantial hazard to both human well-being and the environment, particularly within agricultural regions. Agricultural activities constitute a primary source of ammonia emissions. Thus, effective monitoring and measurement of ammonia sources in agriculture are imperative for mitigating its adverse impact. However, not all existing ammonia detection methods are suitable for discerning the low concentrations typically encountered in agricultural ammonia volatilizing (ranging from 0.01 to 5 parts per million). Consequently, curtailing ammonia volatilization from farmland assumes paramount importance, with real-time monitoring serving as a crucial mechanism for assessing environmental contamination and minimizing agricultural ammonia losses. Deploying appropriate detection methodologies ensures that requisite measures are taken to safeguard human health and the environment from the deleterious repercussions of ammonia exposure.
  • 568
  • 09 Aug 2023
Topic Review
End-of-Life Management of Lithium-Ion Batteries and Circular Economy
Electric vehicles, which are primarily powered by lithium-ion batteries, have gained much attention as the future of transportation for their environmental and economic benefits. However, the economy of lithium-ion battery management is quite linear. A circular economy with reusing and end-of-life recycling of lithium-ion batteries, would reduce the social and environmental costs associated with the mining of metals, decelerate the depletion of natural resources, and prevent the improper management that often accompanies disposal.
  • 626
  • 01 Dec 2022
Topic Review
Energy Accounting for a Renewable Energy Future
For millennia, humans relied almost entirely on renewable energy (RE), largely biomass, for their energy needs. Fossil fuels (FFs) have not only largely replaced RE, but have enabled a many-fold rise in total energy use. This FF dominance changed the way we think about and accounted for energy use. If (as at present) the world essentially continues to ignore climate change, eventual resource depletion will force conversion to RE and, perhaps, nuclear energy will once again have to provide most of the world’s energy use.
  • 272
  • 02 Aug 2023
Topic Review
Energy Efficiency in a Global Context
Energy efficiency is, in principle, a simple idea: an output of human value, for example, vehicle-km traveled, divided by the needed input energy. Efficiency improvements are regarded as an important means of mitigating not only climate change, but also other environmental problems. Much has been written about energy efficiency, but it is mainly concerned with means for improving efficiency, or barriers to implementing higher energy efficiency. In contrast, this entry argues that the concept of energy efficiency needs to be broadened, both conceptually to include ethical considerations, and spatially, to include distant as well as local impacts.
  • 327
  • 28 Jun 2023
Topic Review
Energy Harvesting Opportunities in Geoenvironmental Engineering
Energy harvesting (EH)—or energy scavenging—methods and technologies have been developed to reduce the dependence on traditional energy sources, namely fossil fuels, and nuclear power, also responding to the increase in energy demands for human activities and to fulfill sustainable development goals. EH in geoenvironmental works and the surrounding soil and water environment includes a set of processes for capturing and accumulating energy from several sources considered wasted or unusable associated with soil dynamics; the stress and strain of geomaterials, hydraulic, vibrations, biochemical, light, heating and wind sources can be potential EH systems. 
  • 223
  • 03 Jan 2024
Topic Review
Energy Recovery from Residual Municipal Solid Waste
Among the technologies for the recovery of energy from waste, in particular residual municipal solid waste (rMSW), combustion is the most widely used thermo-chemical treatment process associated with thermal and electric power production by a steam cycle, named, shortly, Waste to Energy (WtE). 
  • 290
  • 26 Feb 2024
Topic Review
Energy Transition in Greece
The global challenge of Reducing Greenhouse Gas (GHG) emissions, recent technological developments and cost reductions of Renewable Energy Sources (RES), the widespread diversification of gas supply sources and the demand for decentralized power generation are leading to a complete and irreversible phase-out from solid fossil fuels, i.e., coal and lignite. For the European Union (EU) regions with high dependence of their local economy on the solid fossil fuel industry, the process of decarbonization will require a significant productive diversification in the medium term and, above all, an immediate solution to the problem of thousands of jobs lost in the coming years. 
  • 332
  • 18 Mar 2024
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