The study assessed the efficiency of immobilized algae (Scenedesmus quadricauda (Turpin) Brébisson) in treating copper toxicity in common carp fish. Acute toxicity of copper towards carp fish was determined. Fish were exposed in aqueous tanks to different heavy metal concentrations (10, 15, 25, and 35 ppm) for 96 h to examine their response. The lethal concentration (LC50) of copper for common carp over 96 h was found to be 1.4 ppm, with fish mortality increasing gradually with higher metal concentrations. Subsequently, half of the LC50 concentration (0.7 ppm) was used as a chronic toxicity concentration, and fish were treated for 21 days to assess copper accumulation in their gills and muscles. Copper concentration in gills on day 5 of the experiment was 16.89 ± 2.2 mg.kg-1 (Mean ± S.D), a significant increase from in muscles, which recorded 10.72 ± 1.1 mg.kg-1 (Mean ± S.D). On day 21, the copper concentration decreased significantly in both gills (4.73 ± 0.5 mg.kg-1) and muscles (8.4 ± 4.5 mg.kg-1) compared to the control group (significant LSD 0.05). But the copper and algae group recorded on day 21 of the experiment (a significant decrease LSD 0.05) in both the gills (mg.kg-1) Mean± S.D) (4.73±0.5) and the muscles (mg.kg-1) Mean± S.D) (8.4±4.5) compared to the copper group. The removal rate in the gills was 75.57%, and in the muscles was 21.17%. Therefore, treatment with immobilized algae is an efficient and promising method for treating copper toxicity in aquatic environments.

This study aims to develop a comprehensive flood hazard map for effective hazard management in the Noa river basin, located in Assam, India, through the integration of Geographic Information System (GIS) tools and a Maximum Entropy (MaxEnt) model. The MaxEnt machine learning algorithm was employed, utilizing eight selected geographic and environmental parameters as predictors to generate the flood hazard map. The accuracy of the generated map was evaluated using the Area Under the Curve (AUC) metric. Key findings of the study identified elevation and slope as critical parameters in the assessment of flood risk. Results revealed that the flood hazard map produced by the MaxEnt model achieved an AUC value of 0.85, indicating high predictive accuracy. The research underscores the significance of flood hazard maps as essential tools for policymakers, enabling the identification of areas vulnerable to severe environmental and economic damage. By providing a reliable and precise assessment of flood-prone zones, this study contributes valuable insights for the formulation of effective flood management strategies and mitigation measures. The implementation of such hazard maps is crucial in enhancing preparedness and resilience against flooding events, ultimately safeguarding lives, property, and infrastructure in the Noa River basin.

The spectrum of the wind speed is expressed as the total wind speed that results from events split up into space, time, or both. It is the relationship shown between the energy or magnitude of any given parameter versus the frequency. In this study, the spectra of the wind speed at the Al-Reem site in Iraq were presented. Since the goal of the current research is to analyze wind speed and direction using the Fast-Fourier-Transform, experimental measurements for the wind speed and wind direction were taken every ten minutes for a year, from December 2014 to December 2015 at heights (10, 30, 50 m). Based on the performance of the Fast-Fourier-Transform, the peak with the highest spectral density, measured at 226,236.282 m/s at the frequency of 2 Hz, was found to be at a height of 50 m throughout the night, while the peak with the lowest height level. The spectral density was 115,863.7 m/s at a frequency of 2 Hz, at a height of (10 m) all into the night. Winds coming from the west and northwest were the most common direction in the region. In the morning, the wind was blowing faster than at night.

The port is a place for ships as sea transportation to dock. The port, as a place of entry and exit for goods or passengers from various regions, places, and environments, encourages the potential for disease transmission to a new environment. Pathogens present in the environment can directly contact the human body through air, touch, and transmission through food around areas with high mobilization. Therefore, this study aims to look at the results of hygiene observations and laboratory testing related to food, drinking water, and air samples at Galala Port, Ambon City. This study used descriptive research with a cross-sectional research design. From all parameter examination results, several examination results do not meet the standards such as food microbiology examination results (E. coli bacteria > 3.6MPN/gr), sanitation (walls and floors are not watertight), the presence of mosquito larvae (seven Aedes albopictus mosquito larvae), drinking water microbiology (total Coliforms 64 CFU.100 mL-1), and clean water microbiology (E. coli > 250 CFU. 100 mL-1 and total Coliforms 8 CFU.100 mL-1). Therefore, it can be concluded that the inspection of restaurants carried out at Galala port, Ambon City, is not appropriate and does not meet the standards according to the Minister of Health Decree number 942 of 2003.

Bioremediation is an important technique to remove heavy metals from wastewater. The current research aimed to use Azospirillum bacteria in removing cadmium ions from wastewater. The source of Azospirillum bacteria was the soil of Al-Mishkhab in Al-Najaf province, Iraq (rice fields), while the source of wastewater was taken from the Al-Rustamia wastewater treatment plant, in Baghdad in October 2020. All the experiments were carried out in Soil and Water Research Center, Ministry of Science and Technology. After collecting the soil, the microorganisms were isolated through the Immunomagnetic beads (IMB) process and were incubated on a certain synthesized medium. The concentration of cadmium ion was determined through the Absorption Spectrophotometer (AAS) technique. The Azospirillum colonies were identified and characterized as white colonies while the concentration of cadmium ion ranged from 0.03-1.6 mg/L and applying the microorganism on the wastewater will decrease the concentration up to 99.9% in a process called biosorption. Treatment time was also studied for 24, 48, 72, and 168 hours. The statistical analysis shows that increasing time will enhance the removal of cadmium. Cadmium is one of the heavy metals responsible for soil contamination; bacteria play a crucial role in bioremediation, demonstrating stability in decomposing various compounds and materials. Azospirillum is employed for soil decontamination purposes; increasing incubation time will enhance the removal of the trace element; also further investigate the effect of other factors such as temperature, pH, and the effect of using other microorganisms.

Food banks play a crucial role in reducing food waste and addressing food vulnerability. Their operations involve an efficient supply chain that collects surplus food, processes it, and distributes it to those in need. This aligns with the goals of a circular economy, aiming to minimize food crises. This research aims to understand the supply chain of the Food Bank Bandung and analyze the implementation of circular economy principles within its supply chain. The study employs qualitative methods, with data gathered through interviews conducted with representatives from the Food Bank located in Bandung City. The collected information was used to design a comprehensive supply chain model, which was then meticulously analyzed. The analysis reveals that the Food Bank in Bandung effectively implements a circular economy by transforming surplus food, which would otherwise go to waste, into consumable items. Furthermore, the food bank adopts circular economy concepts by providing inedible food to Black Soldier Fly (BSF) cultivation for maggot consumption, which then can be used as an alternative source of protein for animal feed. The findings of the study show how circular economy practices can be integrated into food bank operations. By analyzing the circular economy approach in the Food Bank of Bandung, this research contributes to the existing body of knowledge and provides a foundation for future studies, offering a more extensive dataset for researchers and practitioners in the field.

The key observations on the study concerning the geostatistical appraisal, hydrogeochemical environment of major ions (cations and anions) as well as groundwater suitability from the part of Balaghat District (MP) latitude 21°31ʹ42ʺ: 21°43ʹ11ʺ N and longitude 79°50ʹ30ʺ:80°11ʹ30ʺ E., Central India are presented here. The pH (7.3 to 8.6) of the groundwater samples and range of EC values (50-5080 μS.cm-1) typically clarify the alkaline nature and the involvement of diverse processes (geogenic as well as anthropogenic) deciding the hydrogeochemical environment of groundwater. This prominent behavior is the result of the conductivity in groundwater, which is the consequence of ion exchange along with the solubilization processes during the rock-water interaction and also represents anthropogenic activity. The abundance succession of cations is Ca2+ > Na+ > Mg2+ > K+, while the profusion sequence of anions is HCO3- > Cl- > NO3- > SO42- > F-. The positive correlation among the pair of Ca2+ with Mg2+ (r = 0.657), Na+(r = 0.691), and HCO3- (r = 0.842) as well as the high positive association between K+ and SO42- (r = 0.856), plus K+ and NO3- (r = 0.779) unravels the derivation of ions from the geogenic origin and the agro-chemical derivation of ions respectively. The three factors (1:6.350, 2:2.732, and 3:2.697), having a total variance of 87.923%, correspond with the geogenic factor, anthropogenic factor, and alkalinity factor, respectively. The groundwater from the study area is suitable for drinking and irrigation purposes with a slight threat of exchangeable sodium.

Because of the superior qualities of biosurfactants over their equivalents derived from fossil fuels, they have recently attracted more attention. Although production costs are still a major barrier to biosurfactants’ superiority over synthetic surfactants, biosurfactants are expected to grow in market share over the next several decades. Glycolipids, a class of low-molecular-weight biosurfactants, are particularly sought-after for a variety of surfactant-related applications due to their effective reduction of surface and interfacial tension. Rhamnolipids, trehalose lipids, sophorolipids, and mannosyl erythritol lipids are the primary types of glycolipids. Glycolipids are made of hydrophilic carbohydrate moieties joined to hydrophobic fatty acid chains by ester bonds. This review addresses the unique glycolipid production and the wide range of goods available in the global market, as well as the present state of the glycolipid industry. Applications include food processing, petroleum refining, biomedical usage, bioremediation, and boosting agricultural productivity. With biosurfactants, their beneficial Ness in releasing oil encased in rock, a need for enhanced oil recovery (EOR). Another crucial biotechnological component in anti-corrosion procedures is biosurfactants, which stop Crude oil transportation in pipelines and are made easier by incrustations and the growth of biofilms on metallic surfaces. They are also employed in the production of emulsifiers and demulsifies and have other cutting-edge uses in the oil sector. Natural surfactants can be used to lessen pollution produced by chemical solvents or synthetic detergents without compromising the oil industry’s financial gains. Consequently, it is imperative to invest in biotechnological processes. It is anticipated that natural surfactants will take over the global market in the not-too-distant future and prove to be economically feasible. It is likely possible to substitute synthetic surfactants used in agricultural product composition with biosurfactants. Because biosurfactants can benefit crops without harming the environment, they hold great potential as a useful tool in the fight against pesticide use. Furthermore, by making hazardous and leftover pesticides more soluble and thus accessible for biodegradation by other microbes, their potential as bioremediation agents can help to improve the health of soil systems. This article is based on the explanation of various applications of Biosurfactants.

This review explores the impacts of synthetic pesticides and biopesticides on human health, aiming to provide a comprehensive understanding of their benefits and risks. Currently, farmers are using synthetic pesticides to increase the yield of crop production, but they pose significant health risks, such as acute poisoning, cancer, endocrine disruption, anaphylactic shock, and other severe health issues. On the other hand, biopesticides, derived from natural organisms or plant-derived secondary metabolites, are considered safer alternatives, offering effective pest management with reduced risk to human health. This review draws attention to plant-derived materials in pest control management. Further, deciphering plant diseases with phytogenic bacteria and their control by organic bio-pesticides. Conclusively, this review suggests that future research should focus on integrated pest management approaches that combine the strengths of both synthetic and biopesticide applications while mitigating health risks. The findings underscore the imperative for ongoing evaluation of pesticide usage and provide a framework for informed decision-making regarding human exposure to these substances.

This study explores the potential of indigenous bacteria in bioremediating batik dye wastewater, a major environmental pollutant that threatens aquatic ecosystems and human health. The research aimed to identify and characterize bacterial isolates capable of degrading natural dyes (Indigofera tinctoria L., Caesalpinia sappan L.) and synthetic dyes (methyl, naphthol, remazol, indigosol). The variable investigated in this study is the degradation rate of batik dye wastewater by bacteria, both individually and in bacterial consortia. Using isolation, purification, and 16S rRNA sequencing, 15 bacterial isolates were identified, with Stenotrophomonas maltophilia (D), Stutzerimonas stutzeri (H, I), Micrococcus sp. (J), and Pseudomonas sp. (N) exhibiting high effectiveness. Micrococcus sp. (J) achieved degradation rates of 99.62% for Indigofera, 85.74% for red remazol, and 83.05% for blue naphthol, while Pseudomonas sp. (N) degraded remazol red at 94.72%. A bacterial consortium (INJ: Stutzerimonas stutzeri, Pseudomonas sp., and Micrococcus sp.) efficiently degraded indigosol blue at 90.29%. Statistical analyses revealed no significant differences in decolorization between natural and synthetic dyes or dye colors. These bacteria demonstrated strong enzymatic activity under diverse environmental conditions, such as differences in pH, temperature, dye concentration, and chemical composition, providing an eco-friendly and cost-effective solution for batik dye waste bioremediation. The findings support SDG 6 (Clean Water and Sanitation) and SDG 12 (Responsible Consumption and Production) by improving wastewater quality and promoting sustainable waste management in the batik industry.