Journal of Environmental Health Science and Engineering最新文献

{"title":"Efficient magnetic adsorption of polystyrene nanoplastic from aqueous solutions by eco-friendly Fe3O4 nanoparticles: Removal, kinetic and isotherm modeling studies","authors":"Ghassan H. Matar,&nbsp;Cigdem Dikbas,&nbsp;Muberra Andac","doi":"10.1007/s40201-024-00929-7","DOIUrl":"10.1007/s40201-024-00929-7","url":null,"abstract":"<div><p>Today, nanoplastics (NPs) are a growing environmental concern due to their persistence and widespread distribution, posing risks to ecosystems and human health. Their ability to transport pollutants makes them particularly dangerous, underscoring the urgent need for effective removal methods. Herein, we report the synthesis of an environmentally friendly material that enables the magnetic removal of polystyrene nanoparticles (PSNPs) from aqueous solutions by green chemistry approach. The material synthesized by using pine resin extract as a reducing and capping agent is iron oxide magnetic nanoparticles (PR@Fe₃O₄ MNPs). Spectroscopic (UV–Vis, FTIR) and microscopic (EFSEM, EDXS) techniques were used to characterize the nanoparticles and confirm the adsorption of PSNPs on the PR@Fe₃O₄ MNPs. X-ray diffraction (XRD) patterns indicated the crystalline nature of the nanoparticles and confirmed the preservation of the structure of PR@Fe₃O₄ MNPs after adsorption. The adsorption of PSNPs (with a diameter of 100 nm) was performed under varying conditions, including different contact times, dosages of PR@Fe₃O₄ MNPs, and concentrations of PSNPs. It was observed that the removal efficiencies of PSNPs (100 mg/L) ranged from 95.45% to 99.13% when the dosage of PR@Fe₃O₄ MNPs increased from 2.5 mg to 10.0 mg after 24 h, reaching the maximum adsorption capacity at 454.55 mg/g. Kinetic and isotherm studies indicated that the adsorption process fits best to a pseudo-second-order kinetic model and Langmuir isotherm, suggesting monolayer adsorption on homogeneous surfaces. Finally, the results of this study concluded that the green-synthesized PR@Fe₃O₄ MNPs can be used as effective and eco-friendly materials to remove PSNPs from aquatic environments.</p><h3>Graphical abstract</h3>\u0000<div><figure><div><div><picture><source><img></source></picture></div></div></figure></div></div>","PeriodicalId":628,"journal":{"name":"Journal of Environmental Health Science and Engineering","volume":"23 1","pages":""},"PeriodicalIF":3.0,"publicationDate":"2024-12-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142870491","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"环境科学与生态学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Indoor air pollution due to bacterial bioaerosols in beauty salons of Ardabil, Iran: characterization, influencing factors and health risk assessment","authors":"Morteza Alighadri,&nbsp;Maryam Alipour,&nbsp;Hamid Reza Ghaffari,&nbsp;Ahmad Zarei,&nbsp;Noradin Gharari,&nbsp;Bahram Alizadeh,&nbsp;Anoshirvan Sadigh,&nbsp;Asghar Asghari,&nbsp;Mehdi Fazlzadeh,&nbsp;Roohollah Rostami","doi":"10.1007/s40201-024-00927-9","DOIUrl":"10.1007/s40201-024-00927-9","url":null,"abstract":"<div><p>Beauty salons are establishments that provide hair, face, and body treatments for consumers. In this research, type of bacteriological pollution and the associated bacteriological human health risks were evaluated using Monte Carlo Simulation. A cross-sectional study design was carried out in 50 randomly selected beauty salons in Ardabil, during April-June, 2022. <i>Pseudomonas</i> (74 ± 42 CFU/m³) was found frequently in almost all (98%) of the salons. <i>Staphylococcus</i> (9 ± 25 CFU/m³) and <i>Escherichia coli</i> (5 ± 13 CFU/m³) were found in 20%, and <i>Acinetobacter</i> (2 ± 7 CFU/m³) was found in 10% of the salons. Salons with makeup and hair dressing had higher concentrations of <i>Staphylococcus</i>. The concentrations of bacteria fairly decreased with relative humidity and increased with the temperature. Furthermore, higher concentrations of the bioaerosols were observed in larger salons and more crowded salons. There was no significant correlation between the type of heating system, building material of the walls, type of ventilation system, as well as bride’s makeup in the salons with concentration of the bioaerosols. The average annual infection risk of <i>Escherichia coli</i> 7.27 (10^− 4) per person per year (pppy), which was higher than the acceptable limit (10^–4 pppy) suggested by WHO. The results of health risk were above the safe limit of EPA and WHO, indicating possible adverse effects to exposed individuals.</p></div>","PeriodicalId":628,"journal":{"name":"Journal of Environmental Health Science and Engineering","volume":"23 1","pages":""},"PeriodicalIF":3.0,"publicationDate":"2024-11-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://link.springer.com/content/pdf/10.1007/s40201-024-00927-9.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142714568","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"环境科学与生态学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Biomonitoring of metals in the blood and urine of waste recyclers from exposure to airborne fine particulate matter (PM2.5)","authors":"Safiye Ghobakhloo,&nbsp;Amir Hossein Khoshakhlagh,&nbsp;Gholam Reza Mostafaii,&nbsp;Lars Carlsen","doi":"10.1007/s40201-024-00924-y","DOIUrl":"10.1007/s40201-024-00924-y","url":null,"abstract":"<div><p>This is the first systematic investigation of occupational exposure to toxic metals among waste recyclers in municipal waste recycling facilities. Concentrations of heavy metals (HMs) in the blood and urine of exposed recyclers in different jobs were compared to control groups (administrative department), identifying possible work-related and socio-demographic exposure factors. The potential relationship between HMs levels in PM_2.5 and HM concentrations in the blood and urine of recyclers was studied for ten elements. Mean concentrations of HMs of recyclers were significantly higher than for the control group. Over 50% of the waste recyclers had HM levels higher than the recommended limits. The study revealed that most of the waste recyclers engaged in a minimum of three tasks, posing a challenge in establishing a correlation between specific tasks and the levels of elements monitored through biomonitoring. Co levels in blood and Fe levels in the urine of waste recyclers have a significant relationship with the increase in daily working hours. Among the variables related to the participant’s demographic information, the level of education and monthly income were significantly different compared to the control group. Also, a significant correlation was found between HM levels in PM_2.5 personal exposure and recyclers’ urine and blood. Management controls include workflow or, in other words, alternate relocation of workers exposed to severe risks. Engineering controls such as ventilation systems, applying appropriate personal protective equipment (PPE), and risk management methods are the implementation cases to reduce exposure.</p><h3>Graphical abstract</h3>\u0000<div><figure><div><div><picture><source><img></source></picture></div></div></figure></div></div>","PeriodicalId":628,"journal":{"name":"Journal of Environmental Health Science and Engineering","volume":"23 1","pages":""},"PeriodicalIF":3.0,"publicationDate":"2024-11-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142679781","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"环境科学与生态学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Association between particulate matter exposure and acute ischemic stroke admissions in less-polluted areas: a time-series study using a distributed lag nonlinear model","authors":"Xiaoxiao Song,&nbsp;Xiaolan Huang,&nbsp;Jinling Li,&nbsp;Liming Lu,&nbsp;Rui Qin,&nbsp;Miaomiao Xu,&nbsp;Li Su,&nbsp;Lian Gu","doi":"10.1007/s40201-024-00926-w","DOIUrl":"10.1007/s40201-024-00926-w","url":null,"abstract":"<div><h3>Purpose</h3><p>China has experienced a heavy public health burden due to the increasing incidence of ischemic stroke (IS). Few studies have evaluated the relationship between particulate matter (PM) exposure and acute ischemic stroke (AIS) in relatively less-polluted areas, and the results have been inconsistent. As a result, this study aimed to investigate and evaluate the association between PM exposure and hospitalizations for AIS in an area with less air pollution.</p><h3>Methods</h3><p>Through collecting daily AIS hospitalizations, air pollution data and meteorological data from July 1, 2017 to June 30, 2020 in Nanning, this paper explored the association between short-term exposure to PM (PM_2.5, PM₁₀ and PM_c) and daily hospital admissions for AIS using a distributed lag non-linear model based on time-series. To further identify the susceptible populations, stratified analyses were performed by age and gender.</p><h3>Results</h3><p>During the study period, a total of 2382 patients were admitted to hospital with AIS, with the ratio of male to female reached 2.03: 1. No statistical association was found between PM exposure and AIS admissions in the total population. Subgroup analysis showed that PM_2.5, PM₁₀ and PM_c exposures were significantly associated with AIS admissions in male at lag29-lag30, lag27-lag30 and lag25-lag27, respectively. In addition, PM_c exposure was also relevant to admissions for AIS with aged &lt; 65 years at lag18-lag23.</p><h3>Conclusions</h3><p>Short-term exposure to ambient PM was not associated with hospital admissions for AIS in the general population, but males and young adults (aged &lt; 65 years) were more susceptible to PM exposure. Even in areas with relatively low air pollution, appropriate measures should be adopted to intervene in the adverse effects of air pollution on vulnerable populations.</p></div>","PeriodicalId":628,"journal":{"name":"Journal of Environmental Health Science and Engineering","volume":"23 1","pages":""},"PeriodicalIF":3.0,"publicationDate":"2024-11-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142672474","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"环境科学与生态学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Assessing health risks of polycyclic aromatic hydrocarbons (PAHs) in cooked fish using monte carlo simulation: a global review and meta-analysis","authors":"Fathollah Gholami-Borujeni,&nbsp;Roghayeh Abedi Sarvestani,&nbsp;Fatemeh Mortezazadeh,&nbsp;Anoushiravan Mohseni-Bandpei,&nbsp;Fatemeh Nejatzadeh,&nbsp;Hadi Niknejad","doi":"10.1007/s40201-024-00922-0","DOIUrl":"10.1007/s40201-024-00922-0","url":null,"abstract":"<div><p>Cooking food at high temperatures can lead to the formation of harmful chemical compounds called polycyclic aromatic hydrocarbons (PAHs). The purpose of this study was to conduct a systematic review and meta-analysis to evaluate the concentrations of 16 PAHs in cooked fish using roasting, barbecuing, or grilling techniques. The Monte Carlo simulation method was employed to accurately assess and quantify the uncertainties associated with risk estimation. This study compiled data on PAH levels in cooked fish using gas or charcoal from 57 original published articles in the PubMed, Science Direct, Scopus, Google Scholar, and Web of Science databases between January 1, 2010 to December 30, 2023. The investigation showed that 55.1% of cooked fish was made by grilling, 35.1% by barbecuing, and 9.8% by roasting. Based on the 95th percentile Hazard Quotient (HQ) from fish consumption, the ranking of 8 PAHs was as follows: Benzo[a]pyrene (BaP = 14.10) &gt; Pyrene (Pyr = 0.29) &gt; Fluorene (Flu = 0.23) &gt; Naphthalene (Nap = 0.22) &gt; Fluoranthene (Flrt = 0.12) &gt; Acenaphthene (Ace = 0.11) &gt; Acenaphthylene (Acy = 0.04) &gt; Anthracene (Anth = 0.02). However, the non-carcinogenic risk ratio for other PAH compounds in fish consumption, excluding BaP, was found to be less than one (HQ &lt; 1). The 95th percentile lifetime excess cancer risk (LTCR) values for 8 PAH compounds (BaP (4.35E^− 9) &gt; Anth (6.10E^− 11) &gt; Flrt (9.35E^− 12) &gt; Pyr (7.04E^− 12) &gt; Ace (6.56E^− 12) &gt; Flu (4.97E^− 12) &gt; Nap (4.39E^− 12) &gt; Acy (2.57E^− 12)) from fish consumption were negligible and can be disregarded (LTCR &lt; 10^− 6). Based on the analysis of the findings, it can be concluded that the consumption of cooked fish using various methods worldwide does not present a carcinogenic risk linked to PAHs.</p></div>","PeriodicalId":628,"journal":{"name":"Journal of Environmental Health Science and Engineering","volume":"22 2","pages":"425 - 438"},"PeriodicalIF":3.0,"publicationDate":"2024-10-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142492597","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"环境科学与生态学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Correction: Comprehensive systematic review and meta-analysis of microplastic prevalence and abundance in freshwater fish species: the effect of fish species habitat, feeding behavior, and Fulton’s condition factor","authors":"Ramin Nabizadeh Nodehi,&nbsp;Mahdi Hadi,&nbsp;Ahmad Hosseinzadeh,&nbsp;Nahid Azizi","doi":"10.1007/s40201-024-00923-z","DOIUrl":"10.1007/s40201-024-00923-z","url":null,"abstract":"","PeriodicalId":628,"journal":{"name":"Journal of Environmental Health Science and Engineering","volume":"22 2","pages":"609 - 609"},"PeriodicalIF":3.0,"publicationDate":"2024-10-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142492598","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"环境科学与生态学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Microplastic predictive modelling with the integration of Artificial Neural Networks and Hidden Markov Models (ANN-HMM)","authors":"Isaac Sajan R,&nbsp;Manchu M,&nbsp;Felsy C,&nbsp;Joselin Kavitha M","doi":"10.1007/s40201-024-00920-2","DOIUrl":"10.1007/s40201-024-00920-2","url":null,"abstract":"<div><p>Microplastic pollution poses a significant threat to our environment, necessitating effective predictive modelling approaches for better management and mitigation. In this study, we introduce a pioneering methodology that fuses the power of Artificial Neural Networks (ANN) and Hidden Markov Models (HMM) for microplastic predictive modelling. Leveraging a comprehensive dataset, our integrated model exhibits exceptional performance, with an Accuracy of 0.96, Precision of 0.96, Recall of 0.97, and an F1 Score of 0.96. The achieved Accuracy underscores the model’s proficiency in distinguishing microplastic and non-microplastic entities, promising robust and reliable predictions. Precision, as a measure of correct positive identifications, demonstrates our model's effectiveness in minimizing false positives, a crucial aspect for environmental monitoring. Moreover, the perfect Recall score signifies the model's ability to detect all relevant microplastic instances, addressing concerns about false negatives. The F1 Score encapsulates this dual proficiency, showcasing a harmonious trade-off between precision and recall. Our research not only advances the field of microplastic prediction but also highlights the potential of synergizing ANN and HMM methodologies for comprehensive environmental assessments. The reported performance metrics underscore the practical applicability of our approach, offering a valuable tool for tackling the pervasive issue of microplastic pollution and fostering proactive environmental stewardship.</p></div>","PeriodicalId":628,"journal":{"name":"Journal of Environmental Health Science and Engineering","volume":"22 2","pages":"579 - 592"},"PeriodicalIF":3.0,"publicationDate":"2024-09-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142492599","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"环境科学与生态学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Polystyrene nanoplastics: optimized removal using magnetic nano-adsorbent and toxicity assessment in zebrafish embryos","authors":"Chaitanya Kumar,&nbsp;Harpreet Singh,&nbsp;Debopriya Ghosh,&nbsp;Atul Jain,&nbsp;Shailendra Kumar Arya,&nbsp;Madhu Khatri","doi":"10.1007/s40201-024-00921-1","DOIUrl":"10.1007/s40201-024-00921-1","url":null,"abstract":"<div><h3>Purpose</h3><p>The presence of microplastics (MPs) and nanoplastics (NPs) in aquatic ecosystems has raised serious environmental and health concerns. Polystyrene is one of the most abundant plastic polymers found in the environment. Polystyrene MPs/NPs have harmful implications for human health and their removal from the environment has become a serious challenge.</p><h3>Methods</h3><p>In this study, we investigated the adsorptive uptake of polystyrene nanoplastics (PS NPs) from aqueous solutions using fly ash-loaded magnetic nanoparticles (FAMNPs) as the magnetic nano-adsorbent. During the factor screening study, the adsorption process was studied as a function of four variables namely pH (5–10), adsorption time (30–120 min), amount of FAMNPs (0.01–0.04 g), and stirring speed (50–200 rpm). Central composite design (CCD) and response surface methodology (RSM) were employed to establish the relationship between the variables. Furthermore, toxicity assessments of PS NPs were checked on a zebrafish model, shedding light on its potential ecological effects.</p><h3>Results</h3><p>Two variables namely the pH and amount of FAMNPs significantly influenced the adsorption capacity of FAMNPs and were further optimized for subsequent analysis. The optimum operational readings proposed by the model were pH (8.5), and the amount of FAMNPs (0.03 g), resulting in a good adsorption capacity of 29.12 mg/g for PS NPs. The adequacy of the proposed model was evaluated by analysis of variance (ANOVA). Zebrafish embryos exposed to PS NPs revealed physical deformations such as pericardial edema and malformed notochord.</p><h3>Conclusion</h3><p>The study demonstrates the effectiveness of FAMNPs in the adsorption of PS NPs from aqueous solutions, with optimal conditions identified at pH 8.5 and 0.03 g of FAMNPs using RSM. The adequacy of the model was confirmed through ANOVA analysis. Toxicity assessments on zebrafish embryos exposed to PS NPs revealed significant mortality and physical deformations, highlighting the importance of PS NPs removal for environmental health.</p><h3>Graphical Abstract</h3>\u0000<div><figure><div><div><picture><source><img></source></picture></div></div></figure></div></div>","PeriodicalId":628,"journal":{"name":"Journal of Environmental Health Science and Engineering","volume":"22 2","pages":"593 - 604"},"PeriodicalIF":3.0,"publicationDate":"2024-09-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142267164","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"环境科学与生态学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"The effects of different pretreatment technologies on microbial community in anaerobic digestion process: A systematic review","authors":"Hasan Pasalari,&nbsp;Hamed Gharibi,&nbsp;Siamak Darvishali,&nbsp;Mahdi Farzadkia","doi":"10.1007/s40201-024-00917-x","DOIUrl":"10.1007/s40201-024-00917-x","url":null,"abstract":"<div><p>Here we comprehensively review the available knowledge on effects of different pretreatment technologies on microbial population and microbial dynamics in anaerobic digestion (AD) fed with different substrates and different operational parameters. To identify peer-reviewed studies published in English-language journals, a comprehensive search was performed across multiple electronic databases. The eligible studies were analyzed to extract data and information pertaining to the configuration of anaerobic reactors, operational parameters, and various pretreatment processes such as chemical, biological, enzymatic, thermal, microaerobic, and ultrasonic. The findings derived from this current review demonstrated that different chemical, biological, and physical pretreatment technologies improve the biomethane potential (BMP) and potentially affect the dominant bacteria and archaea. Moreover, although hydrogenotrophic methanogenesis are more observed due to resistance to extreme conditions, methane production follows both aceticlastic and hydrogenotrophic pathways in AD assisted with different pretreatment process. <i>Firmicutes</i> and <i>Bacteroidetes</i> phyla of bacteria were the dominant hydrolytic bacteria due to synergetic effects of different pretreatment process on solubilization and bioavailability of recalcitrant substrates. In summary, a holistic understanding on bacteria and archaea communities, along with the mechanisms of the dominant microorganisms leads to enhanced stability and overall performance of anaerobic digestion (AD) processes.</p></div>","PeriodicalId":628,"journal":{"name":"Journal of Environmental Health Science and Engineering","volume":"22 2","pages":"439 - 453"},"PeriodicalIF":3.0,"publicationDate":"2024-08-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142178033","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"环境科学与生态学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Production of biosurfactant by Bacillus megaterieum using agro-food wastes and its application in petroleum sludge oil recovery","authors":"K. Ighilahriz,&nbsp;A. Benchouk,&nbsp;Y. Belkebir,&nbsp;N. Seghir,&nbsp;L. Yahi","doi":"10.1007/s40201-024-00919-9","DOIUrl":"10.1007/s40201-024-00919-9","url":null,"abstract":"<div><p>The objective of this study is to utilize cost-effective renewable substrates derived from agro-food wastes for the production of biosurfactant by <i>Bacillus megaterium</i>, which was isolated from petroleum sludge. Various agro-food waste materials, namely potato peelings (PP), rice cooking water (RW), biscuit by products (BB), carob pods (CP), and eggshells, were evaluated as nutrient sources for bacterial growth compared to a synthetic medium (SM). The results indicate that the medium comprising carob pods, potato peels supplemented with eggshells promoted the growth of the bacteria and the production of Biosurfactants at a rate of 150 mg/l and 140 mg/l respectively. The biosurfactant exhibited an emulsification index (E24) of 55.23 ± 0.32%, 46.47 ± 3% 43.80 ± 0.4%, 18.33 ± 0.25% and 20 ± 0.11% for PP, CP, SM, BB and RW respectively. The biosurfactant produced from PP had the ability to decrease the surface tension of water from 74 to 39.38 mN/m, with a critical micelle concentration (CMC) of 15 mg/L. The chemical characterization of purified biosurfactant was done using Fourier-transform infrared spectroscopy (FTIR) and Thermal gravity (TG), as well as differential scanning calorimetry (DSC) analysis (TG/DSC), revealing the functional groups and thermostability of the biosurfactant. The DSC spectrum for PP biosurfactant showed the highest thermostability with crystalline temperature (Tc) of 150 °C and melting point (Tm) of 295 °C. The extracted biosurfactant was mixed with petroleum sludge, composed of heavy oil, 40.64 ± 0.19% of extracted oil was obtained after 5 h of reaction while using PP based medium.</p></div>","PeriodicalId":628,"journal":{"name":"Journal of Environmental Health Science and Engineering","volume":"22 2","pages":"413 - 424"},"PeriodicalIF":3.0,"publicationDate":"2024-08-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141923186","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"环境科学与生态学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}