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Developing processes with minimal environmental impact is essential for the production of the important intermediates and final products. Present study explores the green and low-cost synthesis of new halogenated derivatives of 1-aminoanthraquinone under catalyst free conditions at room temperature. These derivatives find wide practical application due to their unique properties. Numerous studies on the preparation of new derivatives have been devoted to the development of industrial dyes and pigments. These compo...

Sea buckthorn is a heliophilous species valued for its nutrient-rich orange berries, which find extensive applications in the pharmaceutical, food, and agricultural industries. This study monitored four specific cultivars: Dora, Cora, Mara, and Clara, grown in the Republic of Moldova over a 60-day period (August to September). The research focused on tracking the evolution of primary ripening indicators: vitamin C, total carotenoids, and organic acid content. Ascorbic acid, a vital bioactive component, showed a co...

Combustible dusts are presented in industry as a finished products or process intermediates created voluntarily by milling or involuntarily by abraison of larger sized solid. Spontaneous combustion is a phenomenon that occurs by self-heating, increase in temperature due to exothermic internal reactions, followed by thermal runaway (self heating which rapidly accelerates to high temperatures) and finally, autoignition. The oxidation of combustible powders occurs when they react with air oxygen, producing carbon dio...

This article identified the issue of electronic waste (e-waste) management in Kochi, India, amongst the country's rapid technological growth and escalating electronic consumption. It highlights the severe environmental and health risks of improper e-waste disposal, particularly in the informal recycling sector, which dominates India's recycling landscape. The article emphasises the need for a transformative shift from the existing cradle-to-grave (C2G) system to a Cradle-to-Cradle (C2C) model for circular e-waste ...

In recent years, with the interest in healthy diet and environmental protection, plant-based alternatives, to classic milk, have been developed and produced. In addition to the already well-known products, such as almond or soy milk, amaranth milk is also becoming increasingly known. Amaranth milk is considered a possible alternative with both nutritional and ecological benefits. As a result of environmental problems and people's needs, this paper aims to compare these types of plant-based beverages, in terms of c...

The role of ventilation systems is to ensure and maintain optimal microclimate conditions in industrial spaces, by controlling temperature, humidity, dust concentration and gaseous substances, within limits compatible with comfort and safety requirements. At the same time, these systems must respect permissible noise levels and air circulation speed, so as not to affect the well-being of users. In order to achieve the prescribed parameters of indoor air (temperature, pressure and humidity), it is previously subjec...

Purpose Electronic waste (e-waste) is one of the fastest-growing waste streams globally, posing urgent environmental and social challenges, particularly in emerging economies where recycling infrastructure is underdeveloped and informal recycling practices dominate. This article examines how circular economy (CE) principles can be applied to enhance e- waste supply chains and promote sustainable management. Design/methodology/approach A systematic literature review (SLR) of 50 peer-reviewed articles published betw...

Arsenic (As) and antimony (Sb) are highly toxic, carcinogenic elements from the same group of periodic system. They occur naturally as oxyanions, predicting their affinity to anionactive adsorbents in aqueous environment. The differences in adsorption properties of arsenate (AsO43-) and antimonate (Sb(OH)6-) were tested on natural adsorbents (zeolite, biochar, birnessite, hydrated ferric oxides - HFO) in their original and iron (Fe) or manganese (Mn) - modified forms, using the model solutions of AsO43- and SbO43-...

The purpose of the study is the evaluation of the bioeconomic potential of Western Romania in terms of determining the main agricultural and forestry products and the amount of available organic waste and by-products that can be integrated into the circular bioeconomy. The NUTS 2 administrative region West Romania consists of four counties: Timi?, Arad, Cara?-Severin and Hunedoara, which in total have more than 1.8 million hectares (ha) of agricultural land and large forested areas- a significant but not well expl...

The circular economy represents a systemic change in the economic model towards more efficient use of resources, reduction of environmental externalities and support of innovation. This article analyses the economic impacts and opportunities associated with the implementation of the principles of the circular economy in the European and Czech contexts. Based on a systematic literature review, analysis of strategic documents and selected empirical studies, the macroeconomic benefits, impacts on the labour market, b...

The volatile fatty acids (VFAs) are a valuable source of hydrogen on fuel industry or precursors of polyhydroxyalkanoates, a highly in trend and non-toxic bioplastics. However, the VFAs generation costs are expensive. Therefore, this study proposed a recycling solution of the waste activated sludge (WAS) into VFAs by non-conventional treatment with tandem steps of energic and slow oxidation in alkaline media by hybrid treatment with ozone and sodium percarbonate (SPC), followed by semi-aerobic fermentation at 22oC...

Horizontal composite tanks represent critical components in industrial applications where achieving an optimal balance between mechanical performance, material efficiency, and environmental impact is essential. This study investigates the environmental performance of structurally optimized glass-fiber-reinforced polymer (GFRP) horizontal tanks featuring progressive rib thickness configurations. The composite laminate optimization was carried out through advanced numerical simulations in ANSYS Mechanical 2024 R1, c...

The growing amount of waste and the pressure to transition to a sustainable and circular economy create the need to modernize waste management through technological innovations. This article focuses on the analysis of selected innovative technologies and waste processing, namely plasma gasification, hydrothermal carbonization, chemical recycling of plastics, robotic sorting systems using artificial intelligence and biological processes such as enzymatic degradation of plastics. Based on a systematic literature sea...

This study evaluates the environmental performance of two CNC machining strategies-three-axis and five-axis milling-used in the production of an aluminum wheel upright for a Formula Student vehicle. A process-based gate-to-gate Life Cycle Assessment (LCA) was carried out using Sphera GaBi software and the Ecoinvent 3.9.1 database, focusing exclusively on impacts associated with the manufacturing technologies. The analysis included detailed measurements of electricity consumption, machine time, machining operation ...

The paper presents a medium-temperature modular pyrolysis plant generating electricity from syngas (SG) produced by air conversion of pyrolysis liquid and fed into the electrochemical generator (ECG) battery. Electric output of the plant and district water heater is 100 kW and 126 kW, respectively. The main power characteristics of the plant are determined by physicochemical modeling and energy budgeting methods. Specific consumption of pyrolysis liquid to produce electricity and heat is shown as 108 g/kW-h (169 g...

The article describes the design process for a low-cost aerial delivery system (LCADS) that is a one-time use, disposable, airdrop system consisting of cargo parachute and container. The parachute systems is developed for military resupply missions and for humanitarian relief efforts in areas where ground supply and/or recovery of airdrop equipment is difficult or not feasible. LCADS consists primarily of three types of cargo parachutes capable of supporting and delivering in a wide range of weights, from 70kg up ...

Environmental water chemistry is substantially aided by modern electrochemical research. Sensitive voltammetric techniques are much more useful for metal species in natural waters, where complexation with organic molecules predominates. Many environmental electrochemists are still interested in determining the stability constants of metal ion complexes with various ionic species found in natural waterways. The aim of this work is to investigate the possible influence of complexation of amine and carboxyl groups of...

Sustainable food production is growing along with consumer demands to find healthy products. The management and minimization of food by-products and the recovery of products with low economic value represent both a trend and a current necessity for the food industry. Prunus cerasifera is a species of plum native to Southeast Europe and Western Asia. It is also called Cherry Plum and Myrobolan Plum. It is cultivated mainly as an ornamental plant with several varieties differing in leaf and bud color and secondarily...

One of the main challenges in treating landfill leachate through membranes is managing the resulting concentrate. Depending on the membrane installation's performance and the stored waste's characteristics, significant quantities of concentrate may remain after leachate treatment. Therefore, it is necessary to identify an optimal disposal or treatment method for it. In the European Union List of Waste, the membrane concentrates are associated with leachates and are classified as either hazardous or non-hazardous w...

Plastic materials are one of the main technological discoveries of modern civilization. Thanks to their variable properties and relatively low production costs, they have become an integral part of almost all human activities. The global production of plastics is constantly increasing. They are most often used as packaging materials and also play a vital role in construction and healthcare. In the presented article, the authors examine the methods of handling plastic waste in the Czech Republic and describe indivi...

The paper deals with the possibility of obtaining zinc and iron from waste galvanic sludge, which arises during galvanic plating. Galvanic sludges, which contain more significant amounts of heavy metals, form wastes that are suitable for recycling. These arise during the treatment of wastewater from the operation of the electroplating plant. It is a mixture of metal hydroxides, mainly iron, zinc, chromium, and others. The sludge is sedimented in the reaction wells and, after sedimentation, is pumped into the sludg...

As the planet-s population increases, pollution entering waterways increases, and the availability of non-renewable raw resource materials reduces. It is possible to reduce this pollution by constructing treatment wetlands, but these wetlands use significant amounts of natural aggregates. The question arises: is it not possible to replace non-renewable resources with recycled materials made from construction and demolition waste? This article examines the applicability of recycled building materials as filter medi...

Nutrient-poor, sandy, sterile material from the post-mining sterile dumps such as those in the Maramures region (Romania) presents a challenge for plants. Sterile dumps are considered extreme environments for plants due to their unfavorable physicochemical properties. Phytoremediation has great potential to remove heavy metals from sterile dumps, and Indian mustard (Brassica juncea) seems to be a possible candidate species for this purpose. The potential of Brassica juncea seeds to germinate in a medium contaminat...

Arsenic (As) and antimony (Sb) are elements with similar chemistry and geochemistry, but their environmental risk differ depending on the origin and degree of the pollution. As and Sb are both very toxic, particularly their inorganic substances in the oxidation states of III and V, which also represent the most common As/Sb forms in the environment. In environmental systems, As mostly occurs as the tetrahedrally coordinated, pentavalent arsenate AsO43- (in oxidising environment), and the trivalent arsenite AsO33- ...

Powdered waste sludge from the production of technical stone (TSW), produced by theTechniStone® Company (Hradec Kralove, Czech Republic), was surface modified withFe2+ and Mn2+ inorganic salts and then testified as a potential adsorbent ofenvironmentally important oxyanions (phosphate PO43-, arsenate AsO43- and chromateCrO42-) from contaminated waters. The surface modification in principle consisted increating a thin layer of hydrated Fe/Mn ions in reactive form on the TSW surface.Thanks to the change of the surfa...

This work is a logical conclusion and generalization of results of two-year researchoriented to design the integrated technology of processing of diopside-containing ores towin the scandium compounds and get the wide spectrum of large-capacity products. Thetraditional technology of sulfuric uncovering of mineral raw materials is applied withinthe scope of this work. The technology of scandium compounds extraction with the useof impregnators, which are based on the macroporous carbons soaked with diethylhexylphosph...

Over 3000 million tons of waste management are generated annually, out of which 25%-30% are Construction and Demolition Waste (CDW). Construction and Demolition Waste (CDW) is generating major issues regarding logistics, provision, and environmental impact. The European Commission, by its Waste Framework Directive, is requesting to increase the recycling rate of the weight by 2020. Since actual material separation techniques require manual quality control and sorting, which is dangerous because workers suffer from...

Recycling of asphalt is an important technological process applied worldwide. The strategy is to use as much milled, ripped or broke asphalt material into the new mixture. With the correct technological design, the maximum appreciation of this material is achieved. Due to the dominant use of asphalt mixtures in pavements, it is important to address the possibilities of their recycling. At present, a sufficient amount of reclaimed asphalt with good potential for further use is available in Slovakia. The problem is ...

The present study has been dedicated on the removal process of heavy metal ions from electrolyte solutions by using methods of electroflotation and subsequent filtration in a multi-component system with the presence of various surfactants of different nature. The research was conducted in a five-component system comprising ions of iron (II), nickel (II), copper (II), plumbum (II), and zinc (II) (the total concentration of metal ions is 200 mg/l). The research was conducted in a highly concentrated electrolyte solu...

Taking into consideration limited financing of waste processing industry in Russia, refuse derived fuel production is becoming a promising course to decrease MSW landfilling at minimum cost, as the method allows safe energy recovery in existing cement kilns and precalciners. For its part, the cement industry pursues a lower level of fuel expenditure, which accounts for about 20% of total production cost. In this regard, fossil fuel substitution for fuel from waste is a mutually beneficial solution, linking the int...

Waste disposal and management is one of the urgent issues faced by mankind at the current stage of development. Waste car tires pose a significant threat to the environment, which makes their efficient processing particularly important, as the volume of this type of waste generated each year worldwide is estimated at more than 10 million tons, of which 1 million tons are produced in Russia. A review of the car tire, wood, textile, and plastic pyrolysis products is presented. The products of pyrolysis include pyrol...

The article describes an information-analytical system for assessing the impact of solid waste landfills on the environmental. The proposed system can be an informational basis for creating a national register of municipal solid waste, both authorized, acting in accordance with the requirements of current legislation, and unauthorized dumps. This basis will provide a scientific and economic justification for making decisions on the prospects for the management of municipal solid waste at the regional and local lev...

One of the most important alternatives in sewage sludge ash management is the recovery of essential elements such as phosphorus. Phosphorus is an important element for plants, food supply, human health and industry. Phosphorus is a non-regenerative resource and therefore it is important to find alternative sources to recover phosphorus. Phosphorus recovery as struvite (NH4MgPO4.6H2O) from sewage sludge ash has attracted special attention in the last decade due to the potential to be used as an ecologic fertilizer....

Reverse vending machines (RVM) are a key part of used plastic containers utilization system in Europe and the United States. Waste recognition and sorting in RVM machines can be performed by any of the following procedures: by determining the container material (e.g. using the IR-spectrometer), by recognition of the container type by its shape, or by the barcode identification.[1] These three basic control-procedures make any attempt of the fraud completely impossible. But at the same time, it makes the RVM too ex...

The global economy needs significant changes that will reduce the high consumption of natural resources and the amount of waste generated. The idea of solving the circular economy proposes a path to solve such problems. Thematically, it covers social, political, economic and production issues. However, it should be noted that Circular Economy is not a ready recipe for solving the problems of depleting raw materials and the deteriorating condition of the environment. The basic premise of Circular Economy is a simpl...

BrewerпїЅs spent yeast is a byproduct containing high amounts of nitrogen, vitamins and immunogen compounds such as ?-glucans. Several uses of spent yeast were described, but the phytostimmulatory potential was not previously tested. In the present paper, the effects of spent brewery yeast on rye microgreen growth and composition and the potential use as an elicitor is assessed. Rye microgreens elicited with spent yeast presented improved germination, especially after 4 days of cultivation. Increased plantlet leng...

The objective of this research is to study in laboratoryпїЅs materials such as: cationic bituminous emulsions, aggregates, fly ash, etc., in order to develop optimal and appropriate mix formula for "cold" waste asphalt recycling with the addition of slow breaking cationic bituminous emulsions, fly ash, cement and natural aggregates. The purpose of this approach is to obtain an "optimal combination" comprising the above-mentioned materials as well as the mixing of the wear layer on the surface of the road on which ...

This contribution describes developments in the area of plastic recycling aimed at the reuse of waste materials for the manufacture of a useful product. Throughout development of the concept пїЅmodular flood barrier structureпїЅ, the recovery of plastic materials was assessed, primarily, plastic waste from automobiles and industry. The investigators filed a utility model application, no. SK 5847 Y12, entitled пїЅModular flood barrier structureпїЅ. Terms of the type and composition of source material, polypropylene...

Due to the increased demand and supply shortage, neodymium is listed as critical raw material of the strategic importance in many countries in the world. From this point of view the researches for the development of recycling technologies for this metal are strongly justified. The paper presents the results of laboratory research on the hydrometallurgical recycling of neodymium from hard disk drivers (HDDs). Neodymium magnets are the elements of a positioner which drives the head of the HDD. The study material- si...

Tailings ponds are permeable hydrotechnical structures for retention purposes, specifically designed for safely dumping mining waste from mining operations and for evacuating fluid tailings from mining sites. Tailings ponds are grouped in classes according to their type, intended service life and function at the mining site. Another important criterion of classification is the terrain where the tailings pond is situated. Tailings or mining waste can be defined as the commercially worthless fraction or the waste ma...

Recycling - the process of transforming waste into new materials - represent a modern alternative for eliminating waste and reducing emissions of greenhouse gases. Recycling - part of the 3Rs (Reduce, Reuse, Recycle) in the hierarchy of waste пїЅ helps to reduce the consumption of raw materials and to reduce energy consumption, air pollution (in phase of combustion waste) and water (in phase of waste storage). Among the recyclable materials such as glass, paper, plastic, metal, textiles are used tires. These tires...

Following mining and processing activity, results a significant amount of mining wastes, in the form of sterile mineral. These wastes are stored largely in mining tailing ponds or heaps. The chemical composition of the sterile material depends from one mining site to another. For long time worldwide, tailing deposits were considered waste deposits, without the possibility of future use. A few of the negative effects on the environment my constructing and exploiting mining tailing ponds, heaps, landfills, are the d...

As direct consequence of the urban development, waste management is a multidimensional issue that incorporates political, institutional, social, environmental, and economic aspects. The paper aims to analize the efficiency of waste management strategy, implemented in the town of Boto?ani. It is also considering, the populationпїЅs level of education and perception, regarding selective collection and the quality of public Sanitation Services. Boto?ani is a second rank town (the most important in Boto?ani county), l...

The paper presents the results of column adsorption of Cu 2+ metal ions from synthetic solution (concentration up to 200 mg dm -3) onto beech sawdust and wheat straw. Adsorption ability of the chosen type of adso rbent is considered as a function of the initial pH of solution. The breakthrough curv es are presented as a function of the aqueous phase volume passed through the colu mn allowing getting an insight in the column adsorption features. A very high adsorption degree – higher than 99% was achieved in thes...

Waste deposing is the most important problems for a sustainable development of our societies. In this paper is shown some models, for determinate the exploitation with optimum fees of the waste deposing on the landfill. The model take in account local condition of warehousing, the existing of sorting technology, technical and managerial abilities in waste management, the support for an efficient strategy in regard to tariffs, billing and bills collections. The overall objective is to develop the necessary infrastr...

The aim of the present research work is to investigate the possibility of adding a mixture of non-granulated blast furnace slag (NGBFS) and steel slag, two wastes resulting from metallurgical industry which underwent calcinations previously, in the raw meal for the production of Portland eco-cement clinker. For this purpose, the NGBFS and steel slag from ArcelorMitall Steel Galati were analyzed for chemical, mineralogical and heavy metals contents. Two samples of raw mixes were prepared, one with typically raw mat...

The possibility to obtain new eco-compatible building materials by milling, pressing and direct sintering of secondary raw materials (SRM) derived from a physical/mechanical treatment of municipal solid waste incinerator (MSWI) bottom ashes is discussed. The chemical compositions and particle size distribution of used SRM press powders were evaluated using XRF analysis and by laser granulometer, respectively. The thermal and densification behaviours were studied by non-isothermal DTA-TG and dilatometric techniques...

The legislative framework for the environmental protection in Romania, as a European Union member state, has carried a new approach in the management of the perimeters affected by the industrial activities. At the national level, efforts are made to implement a number of projects (e.g. ISPA [The Instrument for Structural Policies for Preaccession] – Environment) that would lead to a better administration of waste materials associated with these activities (e.g. recycling in the economic circuit or the easy reint...

The feasibility to substitute feldspar raw materials in a porcelain stoneware body with waste Cathode Ray Tube (CRT) glass was investigated. Various compositions, containing different percentages of feldspars and CRT glass, were compared. The densification process was studied by non-isothermal dilatometry and the degree of sintering was evaluated by pycnometric techniques. The structure and phase composition of the final ceramics were studied by SEM and XRD, respectively. The technological parameters and the mecha...