Toxic Waste Research Articles

Environmental protection, health, and occupational safety initiatives: Reducing filter waste and environmental contamination from oil leaks in coal mining excavators

Background: Hazardous and toxic waste contamination in the mining industry is primarily generated from the servicing and maintenance of heavy equipment. One of the key issues in this process is hydraulic oil leaks in excavator units. Additionally, the use of B30 fuel impacts the filter replacement interval, as its lifetime is shorter, thereby contributing to the amount of hazardous and toxic waste. Based on data obtained during the August-November 2023 period, hydraulic system leaks amounted to 4,899 liters. The aim of this study is to assess the implementation of improvement plans aimed at reducing filter waste and environmental contamination caused by oil leaks in excavators. Method: This study is a descriptive quantitative analysis aimed at describing the impact of strategies implemented to reduce filter waste and environmental contamination caused by oil leaks in excavators. The research was conducted at PT. Anteraja Mahada Makmur (PT. AMM) on the jobsite of PT. Multi Harapan Utama (PT. MHU) from August 2023 to March 2024. The variables studied included strategic steps composed of alternative solutions, which serve as the foundation for planning the repair of oil leaks and engine filter damage. The population of the study encompasses all maintenance activities within the company, involving personnel, materials, environment, machinery, and methods. The sample focuses specifically on maintenance activities involving factors that experience deviations, such as personnel, machinery, and methods. Results: The implementation of the improvement plan consists of creating a Standard Form for Follow up suggestion, Creating a special Group for equipment health, Adding a discussion of Plant service H+2 and details of Follow up Equipment Health activities, Cleaning the radiator every 6000 hours by lowering it, Activating tropical spec (+55 degrees) by jumpering CN05 Controller Pump, Installing additional filters to reduce the load on the main filter, Creating Guidance PPM (Machine Inspection Program) and Standardizing Hydraulic Pressure, Sharing Knowledge related to the Hydraulic System, Rebuilding existing tools with available materials, Installing Autodownload VHMS on the Big Digger unit, Developing SS6 for web-based data processing. Conclusion: The implementation of the improvement plan strategy carried out at PT. AMM Site MHU went well and showed maximum results. This can be seen from the positive changes for all elements targeted for improvement (man/workers, machines and methods) which generally have an impact on reducing engine filter waste and environmental contamination due to oil leaks in the excavator unit.

Immune system dysfunction in personnel of chemical hazard facilities: purpose and effectiveness of immunotherapeutic drugs

Clinical signs of the presence of immune dysfunction/insufficiency, identified by questioning workers at the landfill for the storage and destruction of industrial toxic waste, were the basis for performing a screening study of immune status. This included a clinical blood test with determination of the leukocyte formula, assessment of the phenotypic status of lymphocytes for the main subpopulations, determination of the concentration in serum immunoglobulins of various classes, assessment of the migration activity of leukocytes, assessment of the microbicidal capacity of neutrophils and their ability to phagocytosis. When the examined employees were found to have more than 20% changes in the normative range of immune status parameters and the presence of combined disorders in different parts of immunoreactivity, in particular combined disorders in the cellular part of the immune system, it was the basis for conducting an in-depth stage of immunoepidemiological examination. This included determination of functional activity cellular elements of the adaptive component of immunity, assessment of the severity of autosensitization, assessment of the severity and specificity of atopic hypersensitization, assessment of cytokine status in normal conditions and in response to mitogen. When assessing the phenotypic status of immunoreactivity cells, it turned out that the absolute number of T lymphocytes (CD3+ phenotype), helper T lymphocytes (CD3+CD4+ phenotype) and killer T lymphocytes (CD3+CD8+ phenotype) was significantly reduced in the peripheral blood of test site employees (p ≤ 0.05, compared with similar indicators in the control group). On the contrary, the content of NK cells (CD3-CD56+ phenotype) tended to increase (both the absolute number and the proportion among other lymphocyte populations). Dysfunction of the cellular component of humoral immunoreactivity (a significant decrease in the absolute number of lymphocytes with the CD3-CD20+ phenotype [B lymphocytes] in the peripheral blood), as well as a significant increase in the concentration of serum IgA-class immunoglobulin and pronounced disimmunoglobulinemia in the serum of the examined individuals (compared to individuals in the control group ) indicated a predominantly inhalation method of exposure to immunotoxic industrial toxicants from the landfill on the immune system. Pathogenetically targeted immune-oriented therapy for the personnel of the test site was carried out with drugs that have thymomimetic activity (cytovir-3, thymogen) and are a means of replacement immunocorrection with a cytokine drug (genetically engineered recombinant yeast IL-2 [roncoleukin]). The established effectiveness of the immunotherapy, in particular the reduction in the incidence rate of various nosological forms of immune-related pathology among the site employees who received immunotherapy and the presence of an immunocorrective effect in the immunoactive drugs used for therapy, indicate the advisability of carrying out preventive medical measures in persons professionally exposed to xenobiotic influences as a component of improving medical provision.

Effect of Synthesis Process on The Piezoelectric Properties of (1-x) NBT-xBT: A Comparative Study Between Solid State and Hydrothermal Methods

Lead-free oxide perovskite materials are produced to ensure that no toxic or dangerous waste is released into the environment, although this technique often requires a high-temperature synthesis method. Nevertheless, the development of an environmentally friendly chemical process to carry out the synthesis of perovskite material in the laboratory at low temperature is a major challenge. In this investigation, to lower the temperature of the thermal treatment, (1-x)(Na0.5Bi0.5)TiO3-xBaTiO3 (abbreviated as (1-x)NBT-xBT) ceramics were synthesized using two different methods: a hydrothermal method and a conventional calcination process (solid-state), using the same reagents. The effects of various synthesis techniques on the composition, structure, morphology, and dielectric properties of the (1-x)NBT-xBT ceramics were registered and examined. The XRD plots taken at ambient temperature were used to verify the phase formation of the samples. The occurrence of functional bands was also verified by Raman spectroscopy at ambient temperature. Using the Rietveld refinement method were able to detect the morphotropic phase boundary (MPB) near x=0.05-0.07. When the hydrothermal process was adopted, the (1-x)NBT-xBT ceramics show a single perovskite structure sintered at 1000°C. Moreover, scanning Electron Microscopy (SEM) examination revealed a uniform distribution of grains and a significant change in grain size with the increase in BaTiO3 concentration when compared to the conventional method. The microstructure of ceramics is generally strongly influenced by the method used to prepare the powders, which has a considerable impact on their performance. Piezoelectric and dielectric properties of the specimens have been compared with the properties of those prepared by the hydrothermal process. Thus, the choice of the suitable synthesis method depends on the desired properties of the (1-x)NBT-xBT materials.

Polyurethane Vitrimers Engineered with Nitrogen-Coordinating Cyclic Boronic Diester Bonds for Sustainable Bioelectronics.

Flexible bioelectronic devices seamlessly interface with organs and tissues, offering unprecedented opportunity for timely prevention, early diagnosis, and medical therapies. However, the majority of flexible substrates utilized in bioelectronics still encounter significant challenges in terms of recyclability and reprocessing, leading to the accumulation of environmentally and biologically hazardous toxic waste. Here, the study reports the design of recyclable polyurethane (PU) vitrimers engineered with internal boron-nitrogen coordination bonds that can reversibly dissociate to boronic acids and hydroxyl, or undergo metathesis reaction following an associative pathway. The study demonstrates the capacity of these recyclable PU vitrimers as flexible substrates in various wearable and implantable bioelectronic applications, achieving high-quality electrophysiological recordings and stimulation. Furthermore, the study establishes a sustainable recycling process by reconstructing a range of bioelectronic devices from the recycled PU vitrimers without compromising the mechanical performance. This closed-loop approach not only addresses the critical challenge of the reclaiming medical electronic waste but also paves the way for the development of sustainable flexible bioelectronics for healthcare applications.

Learning From Community-Based Efforts Toward Shared Responsibility for Climate and Environmental Justice

In this exploratory inquiry, the research team investigates community-based data practices in climate and environmental justice initiatives. We set out to learn from the long history and current activities of communities seeking to hold corporate and government actors responsible to enact care for the climate and environment (e.g., monitoring air quality and waterways affected by petrochemical industries). Through a critical intersectional care ethics lens, we follow how groups respond to harms to ecosystems and seek healing, positioning their epistemic authority as they work with data (e.g., Ottinger, 2023; Puig de la Bellacasa, 2017). This work draws insights from inquiries which have examined how communities engage with climate action and efforts toward environmental sustainability (e.g., dos Santos et al., 2024; Kaczmarek, 2023; Nathan, 2012). Through a poster reporting on preliminary research, we share early analyses highlighting communities’ labor of resisting corporate delay, denial, and other dis- and mal-information practices, which slow or block urgently needed action and truth-telling. Methods involve analysis of archival records created by and about communities affected by the Love Canal toxic waste crisis in Western New York. The project aims to appreciate differences and similarities in community-based data practices, identifying further possibilities for information professionals and libraries, archives, and museums to uphold these data practices and associated knowledge and memory work, research, and storytelling. In turn, the team proposes future work to trace the development of community-based practices with climate and environmental data over time.

Analysis of Hazardous and Toxic Waste Management (B3) from the Perspective of Safety, Health, Productivity and Waste Minimization at PT X

Analysis of Hazardous and Toxic Waste Management (B3) from the Perspective of Safety, Health, Productivity and Waste Minimization at PT X

Adsorption of Chromium (VI) and Lead (II) in Synthetic Solutions Using Tamarindus Indica Fruit Peel

The problem of water pollution persists and, in some cases, has been getting worse since many of the industries that are currently installed in developing countries do not comply with established standards. In order to reduce water pollution, various environmental standards have been established that aim to regulate the introduction of contaminating agents into water and, thereby, control the degree of alteration of the quality of the vital liquid. Adsorption allows minimizing the generation of toxic waste and the recovery of the metal. The objective of the work was to study the bioadsorption of Cr (VI) and Pb (II) using the dry peel of <i>Tamarindus indica</i>. We worked at different pH values and concentration levels. The determination of the chemical-physical parameters was carried out at the Empress Geominera Oriente. Adsorption isotherms were performed using the Langmuir, Freundlich and Dubinin-Radushkevich models, resulting in the maximum bioadsorption capacity of Cr (VI) and Pb (II) by biomass being 3.83 and 15.63 mg/g, respectively. reaching maximum removal percentages of 90.8%. The values of mean free energy of adsorption obtained from the Dubinin-Radushkevich model in Cr (VI) and Pb (II) were 10,000 kJ/mol, respectively, showing that, for these experimental conditions, the adsorption process is of a chemical nature.

Biofloc Technology in Improving Shellfish Aquaculture Production – A Review

Abstract Biofloc technology is instrumental in improving growth performance and yield in shellfish aquaculture, while leading to enhanced water quality through maintaining the nutrients level within a safe range. More specifically, toxic nitrogenous wastes are converted into beneficial microbial biomass known as “biofloc”, contributing to improve shellfish immune system. Among the various parameters affecting the efficiency of the process is the carbon source and C:N ratio. In light of these, the present work critically reviews the effects of biofloc systems on growth performance, immunity and diseases resistance in shellfish production. Moreover, it scrutinizes the microbial diversity and nutritional composition of biofloc. Then, the application of the technology in various shellfish cultures, including shrimp, freshwater prawn, crabs, crayfish, clam, and oyster, is presented. Overall, biofloc systems contribute to enhanced shellfish survival rate to the highest value of 96–100% for marine shrimp, 95–99% for freshwater prawn, 70–83% for crayfish, 83–100% for oyster, Crassostrea sp. and up to 2% for mud crabs larvae through substantially reducing the ammonia level in the culture (summarized in Table 1 – Table 5). Finally, the main challenges in utilizing biofloc systems, i.e., suitable aeration and mixing and microbial mechanisms involved are also explained to shed light on future research directions in the field.

A review on digital transformation in healthcare waste management: Applications, research trends and implications.

At present, both emerging and developed economies have faced the challenge of higher healthcare waste generation. Developed countries are using these technologies to manage healthcare waste and cope with the challenge. Emerging economies are still struggling to understand and implement digital technologies in healthcare waste management, posing a danger to partners handling toxic and hazardous waste. The proper handling of healthcare waste is essential for social and environmental sustainability. Digital technologies that drive digital transformation in the healthcare sector impact the traditional way of managing healthcare waste. Digital technologies include artificial intelligence, blockchain, the Internet of Things, sensors, data analytics and radio frequency identification. These technologies can potentially address vehicle route planning and scheduling problems, resource optimisation, real-time tracking and the visibility of healthcare waste management. Apart from economic and environmental concerns, the operational workforce also takes care of societal well-being and implements waste management strategies and policies. Past research has focused on integrating blockchain technology to enhance traceability and transparency in waste collection and disposal activities. However, the application and impact of these technologies for managing different operations of healthcare management with sustainability is a gap bridged by the present study. This study adopts a systematic literature review to identify research trends, applications and implications of digital transformation. It proposes a digital technology-driven framework for healthcare waste management for further research.

Eco-friendly iron extraction from fe-containing copper smelting slag via reduction roasting with coal and magnetic separation: Experimental and mechanism insights

Copper smelting slag (CSS) is a byproduct produced during the thermal smelting of copper and poses a considerable environmental challenge, particularly in China, where its accumulated volume surpasses 1.8 billion tons. This study utilized the response surface method (RSM) to optimize experimental procedures and reduce costs, the results showed that the effects of each factor on iron recovery were in the following order: roasting temperature > roasting time > coke dosage. The optimized iron recovery of iron extraction from CSS by Magnetization-roasting reached 78.87 %, while the actual iron recovery was 78.84 %. The relative error is very small, indicating that the model is effective. Conducted the thermodynamic computational analysis to understand the migration of metal phases in CSS, employed XPS analysis to identify valence changes in key elements, and the clever combination of restricted reduction kinetics and SEM-EDS analysis shows that the reduction reaction of CSS is mainly controlled by interfacial chemistry and carbon gasification at low temperatures. By processing CSS, the study successfully produced environmentally friendly iron that can be recycled, offering a sustainable solution for managing toxic waste from copper production.

Highly effective direct conversion of H2S into COx-free H2 and S at low temperature over novel MoxC@ZrO2 microwave catalysts

Direct decomposition of H2S into H2 and S is an attractive alternative to the Claus process, because COx-free H2 and S can be simultaneously recovered from an abundant and toxic waste gas, which has huge social economic and ecological environmental benefits. However, it is still a great challenge to achieve the direct H2S decomposition reaction with high efficiency due to the thermal equilibrium limitation. Herein, a core-shell structured MoxC@ZrO2 was developed as novel microwave catalyst for microwave catalytic H2S decomposition. More specifically, the H2S conversion over MoxC@ZrO2 catalyst is as high as 99.9% at 650 °C, which immensely surpasses the H2S equilibrium conversion (6.1% at 650 °C). This study provides an effective strategy for the design of highly active microwave catalysts, and supplies a strategy for efficiently catalytic decomposition of H2S waste and recovering high-value hydrogen and sulfur at lower reaction temperatures.

Advancing nanomaterial synthesis: Harnessing green chemistry for sustainable innovation

Nanotechnology has experienced substantial expansion due to its wide-ranging applications, and in view of this, different synthetic routes were developed and many of them employ toxic reagents, have high energy consumption and generate toxic waste. Nowadays, with growing concerns regarding environmental and health safety, green chemistry is gaining prominence and as a result, certain synthetic routes have been replaced to align with the principles of green chemistry. This review outlines current methods for synthesizing silver, iron, and carbon nanoparticles, alongside discussions on green synthesis routes and their mechanisms. Additionally, it evaluates future perspectives on green synthesis, addressing the challenges that need to be overcome.

Energy from Garbage: Recycling Heavy Metal‐Containing Wastewater Adsorbents for Energy Storage

The global challenge of heavy metal contamination in wastewater necessitates efficient adsorbents, which, while they can effectively remove contaminants, ultimately become toxic waste themselves. Recycling wastewater adsorbents loaded with heavy metals is an alternative to their disposal as toxic garbage. This study presents a genuine recycling strategy for heavy metal‐loaded adsorbents, repurposing them as electrode materials for energy storage applications, that is, electrochemical capacitors, and thus synergistically tackles water purification and waste valorization. Graphene oxide was prepared via the improved Hummers’ method, and subsequently, a reduced graphene oxide (rGO) foam was hydrothermally synthesized. This rGO‐based foam adsorbed >95% of the Hg2+ ions in a 100 ppm solution, using a dose = 500 mg L−1, and up to 240 mg of Hg2+ ions/g on average at 25 °C, which are among the highest values reported so far. Electrochemically, the Hg‐loaded rGO (rGO/Hgads) exhibits mercury redox activity and a 15% increase in capacity as compared to pristine rGO in an aqueous cell. Overall, this demonstrates the potential of reprocessed wastewater adsorbents as efficient and sustainable electrodes for high‐power energy storage (time constant τ = 11 s), offering a compelling solution to add more value and extend the life cycle of waste materials.

Distance from different types of toxic waste sites and placental histopathology.

Distance from different types of toxic waste sites and placental histopathology.

A Zwitterionic Hydrogel-Based Heterogeneous Fenton Catalyst for Water Treatment.

Persistent organic pollutants (POPs), including xenoestrogens and polyfluoroalkyl substances (PFAS), demand urgent global intervention. Fenton oxidation, catalyzed by iron ions, offers a cost-effective means to degrade POPs. However, numerous challenges like acid dependency, catalyst loss, and toxic waste generation hinder practical application. Efforts to create long-lasting heterogeneous Fenton catalysts, capable of simultaneously eliminating acid requirements, sustaining rapid kinetics, and retaining iron efficiently, have been unsuccessful. This study introduces an innovative heterogeneous zwitterionic hydrogel-based Fenton catalyst, surmounting these challenges in a cost-effective and scalable manner. The hydrogel, hosting individually complexed iron ions in a porous scaffold, exhibits substantial effective surface area and kinetics akin to homogeneous Fenton reactions. Complexed ions within the hydrogel can initiate Fenton degradation at neutral pH, eliminating acid additions. Simultaneously, the zwitterionic hydrogel scaffold, chosen for its resistance to Fenton oxidation, forms strong bonds with iron ions, enabling prolonged reuse. Diverging from existing designs, the catalyst proves compatible with UV-Fenton processes and achieves rapid self-regeneration during operation, offering a promising solution for the efficient and scalable degradation of POPs. The study underscores the efficacy of the approach by demonstrating the swift degradation of three significant contaminants-xenoestrogens, pesticides, and PFAS-across multiple cycles at traceconcentrations.

Penegakan Hukum terhadap Korporasi sebagai Pelaku Tindak Pidana Pencemaran Air

The increase in economic needs in a society causes one of the basic human rights to be violated by corruption perpetrators, the existence of waste pollution carried out by PT. Sari Inti Prima Perkasa due to leakage of wastewater treatment installations causes the river and land of residents around the location of PT. Sari Inti Prima Perkasa to experience a decline in environmental quality. The purpose of this study is to determine the role of criminal law in enforcing the law, and efforts that can be made to realize environmental sustainability and preservation. This research method is normative legal research by delving deeper into secondary information in the form of literature reviews and related laws and regulations. Primary legal materials are laws and regulations such as Law Number 32 of 2009 concerning Environmental Management and Protection, Government Regulation Number 101 of 2014 concerning Management of Hazardous and Toxic Waste, and Government Regulation Number 22 of 2021 concerning Implementation of Environmental Protection and Management and Decision Number: 168 / Pid.BLH / 2023 / PN.Bls. The results of the study are based on Decision Number: 168/Pid.BLH/2023/PN.Bls, which sentenced the Defendant to 1 (one) year in prison and a fine of Rp. 100,000,000 (one hundred million rupiah) with the provision that if the fine is not paid, it will be replaced with imprisonment for 1 (one) month. The conclusion is that environmental criminal law enforcement has been carried out in accordance with the laws and regulations in force in Indonesia. The suggestion is to encourage collaboration and coordination between every stakeholder in the community in order to protect the environment and more massive law enforcement in realizing environmental sustainability and sustainability.

CSF dynamics throughout the ventricular system using 4D flow MRI: associations to arterial pulsatility, ventricular volumes, and age

BackgroundCerebrospinal fluid (CSF) dynamics are increasingly studied in aging and neurological disorders. Models of CSF-mediated waste clearance suggest that altered CSF dynamics could play a role in the accumulation of toxic waste in the CNS, with implications for Alzheimer’s disease and other proteinopathies. Therefore, approaches that enable quantitative and volumetric assessment of CSF flow velocities could be of value. In this study we demonstrate the feasibility of 4D flow MRI for simultaneous assessment of CSF dynamics throughout the ventricular system, and evaluate associations to arterial pulsatility, ventricular volumes, and age.MethodsIn a cognitively unimpaired cohort (N = 43; age 41–83 years), cardiac-resolved 4D flow MRI CSF velocities were obtained in the lateral ventricles (LV), foramens of Monro, third and fourth ventricles (V3 and V4), the cerebral aqueduct (CA) and the spinal canal (SC), using a velocity encoding (venc) of 5 cm/s. Cerebral blood flow pulsatility was also assessed with 4D flow (venc = 80 cm/s), and CSF volumes were obtained from T1- and T2-weighted MRI. Multiple linear regression was used to assess effects of age, ventricular volumes, and arterial pulsatility on CSF velocities.ResultsCardiac-driven CSF dynamics were observed in all CSF spaces, with region-averaged velocity range and root-mean-square (RMS) velocity encompassing from very low in the LVs (RMS 0.25 ± 0.08; range 0.85 ± 0.28 mm/s) to relatively high in the CA (RMS 6.29 ± 2.87; range 18.6 ± 15.2 mm/s). In the regression models, CSF velocity was significantly related to age in 5/6 regions, to CSF space volume in 2/3 regions, and to arterial pulsatility in 3/6 regions. Group-averaged waveforms indicated distinct CSF flow propagation delays throughout CSF spaces, particularly between the SC and LVs.ConclusionsOur findings show that 4D flow MRI enables assessment of CSF dynamics throughout the ventricular system, and captures independent effects of age, CSF space morphology, and arterial pulsatility on CSF motion.

Analysis of the Management of Hazardous and Toxic Waste (B3) in a dairy processing company

Analysis of the Management of Hazardous and Toxic Waste (B3) in a dairy processing company

Extraction of pesticides from soil using direct-immersion SPME LC-Tips followed by GC–MS/MS: Evaluation and proof-of-concept

A new method was evaluated and developed for the analysis of pesticides in sandy-loam soil by direct-immersion solid phase microextraction (DI-SPME) followed by gas chromatography tandem-mass spectrometry (GC–MS/MS) determination. Ten pesticides were selected based on a literature survey of the compounds reported to be present in EU soils. The extraction was performed using SPME LC-Tips, a new SPME configuration with the coated fibers attached to a disposable and easy-to-handle micropipette tip, which was immersed into a soil slurry made by the addition of an aqueous solution to the soil sample. Ten experimental parameters were evaluated with a Plackett-Burman design, after which the extraction time and percentage of organic solvent in the aqueous extraction were optimized separately. The two fiber chemistries available (PDMS/DVB and C18) were evaluated in parallel for the entire work. In the final method, slurry samples were made by adding an aqueous solution (6 % methanol v/v) to 2 g of soil. The fiber was conditioned and then inserted, for extraction, into the samples, stirred by a magnetic bar. Afterwards, the analytes were desorbed onto 100 µL of methanol. After the addition of analyte protectants (ethylglycerol, gulonolactone, and sorbitol) the extract was injected into the GC–MS/MS system. Isotopically labelled penconazole was used as internal standard. A calibration was performed by extracting spiked soil with analyte concentrations of 0.1–50 µg/kg. Coefficients of determination of the linear calibration were between 0.94–0.98 for the PDMS/DVB and 0.92–0.99 for the C18. Limits of detection range between 0.01–10 µg/kg for the PDMS/DVB and 0.1–10 µg/kg for the C18. Overall, the C18 analytically outperformed the PDMS/DVB but required a longer extraction time (120 min vs 75 min for the PDMS/DVB). This method allows automation and generates low residual toxic waste, having the potential to be introduced as a greener and simpler alternative to currently used sample preparation methodologies.

Green Wearable Sensors and Antennas for Bio-Medicine, Green Internet of Things, Energy Harvesting, and Communication Systems.

This paper presents innovations in green electronic and computing technologies. The importance and the status of the main subjects in green electronic and computing technologies are presented in this paper. In the last semicentennial, the planet suffered from rapid changes in climate. The planet is suffering from increasingly wild storms, hurricanes, typhoons, hard droughts, increases in seawater height, floods, seawater acidification, decreases in groundwater reserves, and increases in global temperatures. These climate changes may be irreversible if companies, organizations, governments, and individuals do not act daily and rapidly to save the planet. Unfortunately, the continuous growth in the number of computing devices, cellular devices, smartphones, and other smart devices over the last fifty years has resulted in a rapid increase in climate change. It is severely crucial to design energy-efficient "green" technologies and devices. Toxic waste from computing and cellular devices is rapidly filling up landfills and increasing air and water pollution. This electronic waste contains hazardous and toxic materials that pollute the environment and affect our health. Green computing and electronic engineering are employed to address this climate disaster. The development of green materials, green energy, waste, and recycling are the major objectives in innovation and research in green computing and electronics technologies. Energy-harvesting technologies can be used to produce and store green energy. Wearable active sensors and metamaterial antennas with circular split ring resonators (CSSRs) containing energy-harvesting units are presented in this paper. The measured bandwidth of the matched sensor is around 65% for VSWR, which is better than 3:1. The sensor gain is 14.1 dB at 2.62 GHz. A wideband 0.4 GHz to 6.4 GHz slot antenna with an RF energy-harvesting unit is presented in this paper. The Skyworks Schottky diode, SMS-7630, was used as the rectifier diode in the harvesting unit. If we transmit 20 dBm of RF power from a transmitting antenna that is located 0.2 m from the harvesting slot antenna at 2.4 GHz, the output voltage at the output port of the harvesting unit will be around 1 V. The power conversion efficiency of the metamaterial antenna dipole with metallic strips is around 75%. Wearable sensors with energy-harvesting units provide efficient, low-cost healthcare services that contribute to a green environment and minimize energy consumption. The measurement process and setups of wearable sensors are presented in this paper.