Journal of hazardous materials advances最新文献

{"title":"Insights on leaching, adsorption–desorption of spirotetramat and its four metabolites on “Third Pole” pollution-free area:Qinghai–Tibet Plateau","authors":"Hongyu Chen ,&nbsp;Wei Li ,&nbsp;Haixia Zhu,&nbsp;Shuo Shen","doi":"10.1016/j.hazadv.2024.100453","DOIUrl":"10.1016/j.hazadv.2024.100453","url":null,"abstract":"<div><p>The use of pesticides has led to increased soil and water pollution, which has even affected the world's third pole, the Tibetan Plateau. In this study, the adsorption and desorption experiments of spirotetramat on three typical soils were conducted to investigate the migration and leaching risk of pesticides in the Qinghai-Tibet Plateau ecosystem. We used batch equilibrium technique for adsorption-desorption experiments and evaluated leaching risk by computational simulation experiments under laboratory conditions. The Freundlich adsorption constants K_f of spirotetramat in the soils of Haidong, Haixi and Haibei were as follows: At 22.26, 15.13 and 6.85, the maximum adsorption capacity C_max was 434.80, 217.40 and 169.50 mg kg^-1, the average adsorption rates were 77.92, 54.27 and 39.13 %, and the desorption constants (K_f) were 43.27, 22.35 and 11.56, respectively. The hysteresis coefficient HI&gt;1.00 in the soil of Haidong and Haixi, and 0.70&lt;HI&lt;1.00 in the soil of Haibei, indicating that with the increase of temperature, the adsorption capacity of the tested soil for spirotetramat decreases, which increases the migration risk of pesticides. The desorption of spirotetramat in the soil of Haidong and Haixi has a lag. The GUS values of spirotetramat in the soils of Haidong, Haixi and Haibei were 1.15, 1.63 and 1.72, respectively, which were all lower than 1.80, indicating that spirotetramat was a non-leaching pesticide, and the leaching risk of spirotetramat in the soils of Qinghai was small, and the potential harm to groundwater was at a low level.</p></div>","PeriodicalId":73763,"journal":{"name":"Journal of hazardous materials advances","volume":"15 ","pages":"Article 100453"},"PeriodicalIF":5.4,"publicationDate":"2024-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.sciencedirect.com/science/article/pii/S2772416624000548/pdfft?md5=5dcc2c8dea4fb4bfe1a38accb845fb86&pid=1-s2.0-S2772416624000548-main.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142098966","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Removal of contaminants from river Jakara using iron oxide nano particles prepared from Citrullus lanatus fruit waste","authors":"Paul Ocheje Ameh ,&nbsp;Mohamed A. Habila ,&nbsp;Rajni Garg ,&nbsp;Christian Chinweuba Onoyima ,&nbsp;Godwin O. Ihegboro ,&nbsp;Chimaobi James Ononamadu ,&nbsp;Rishav Garg ,&nbsp;Zainab Adamu ,&nbsp;Udeh Jideoliseh Joel ,&nbsp;Racheal Showunmi","doi":"10.1016/j.hazadv.2024.100450","DOIUrl":"10.1016/j.hazadv.2024.100450","url":null,"abstract":"<div><p>Achieving sustainable development requires efficient waste water treatment. Green synthesized iron nanoparticles have attracted much attention as potential catalysts for water remediation in view of their lost cost, high reactivity and good adsorption capacity. This study investigated the applicability of iron oxide nanoparticles synthesized from <em>Citrullus lanatus</em> fruit waste (IONP) in the remediation of contaminated water samples that were collected from River Jakara in Kano State Nigeria. The prepared nanoparticle was characterized using Brunauer–Emmett–Teller (BET) surface area, Scanning Electron Microscopy (SEM), X-ray diffraction (XRD), Fourier transform infrared (FTIR) spectroscopy and Thermogravimetric Analysis (TGA). The BET results revealed that IONP have large surface area and are nanometer sized particles. SEM analysis indicated that the adsorbent contain microsphere which might have facilitated the efficient purification of the river water while TGA study revealed that the adsorbent exhibited a three step decomposition process. Data obtained from XRD indicated that the synthesized adsorbent is of high purity and crystalline in nature with an average particle size of 17 nm. Results obtained after treatment of the river water with the adsorbent gave enhanced values of Total Dissolved Solids, Turbidity, Chemical Oxygen Demand, Dissolved Oxygen, phosphate and pH; thus confirming the high adsorption ability of the prepared nanoparticles. The percentage removal of Ni(II) Pb (II) and Cd (II) ions in the river water by IONP was found to depend on adsorbent concentration, agitation time and pH. The adsorption process of these metal ions onto the adsorbent was best described by the Langmuir isotherm model and followed pseudo second order kinetics. The regeneration stability of the adsorbent was adequate when treated with the heavy metals ions at optimum conditions. The nanoparticle synthesized from <em>Citrullus lanatus</em> waste was found to be an efficient and environmentally friendly alternative for treatment of contaminated water.</p></div>","PeriodicalId":73763,"journal":{"name":"Journal of hazardous materials advances","volume":"15 ","pages":"Article 100450"},"PeriodicalIF":5.4,"publicationDate":"2024-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.sciencedirect.com/science/article/pii/S2772416624000512/pdfft?md5=914ade04efe0b491c4749307a0c76f79&pid=1-s2.0-S2772416624000512-main.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141841527","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Toxicological effect of deltamethrin on enzymatical, apoptosis and immune response, histological morphology in Litopenaeus vannamei","authors":"Kangyuan Qu ,&nbsp;Sukma Melati ,&nbsp;Junwei Zeng ,&nbsp;Jiayu Li ,&nbsp;Menglin Shi ,&nbsp;Liutong Chen ,&nbsp;Yucheng Liu ,&nbsp;Shiwei Xie","doi":"10.1016/j.hazadv.2024.100456","DOIUrl":"10.1016/j.hazadv.2024.100456","url":null,"abstract":"<div><p>Deltamethrin (DM) use in agricultural production and storage can result in the presence of residues in several feed ingredients, which can then be ingested by aquatic animals, potentially leading to adverse health effects. Although the potential toxicity of the lipophilic deltamethrin has been evaluated in several studies, there is a paucity of comprehensive studies on the negative effects induced by chronic exposure of shrimp to deltamethrin at different dietary lipid levels. A feeding experiment of six weeks was carried out to assess whether alterations in dietary lipid levels have an impact on the toxicity of DM. In a feeding experiment on <em>Litopenaeus vannamei</em>, the effects of dietary fat levels on the toxicity of DM were studied. There were six distinct diets created comprising three levels of DM (0.2 mg⋅kg^–1, 1 mg⋅kg^–1, 5 mg⋅kg^–1), and two lipid levels (6.96 %, 10.88 %). The diets were designated as LF0.2, LF1, LF5, HF0.2, HF1, HF5. The growth performance and whole shrimp body lipid were reduced with the increase of DM addition to the diet, and DM caused abnormal changes in lipoproteins (LDL, HDL, LPS) in shrimp when feeding diets containing high doses of DM. Furthermore, GOT, GPT, AKP, and ACP activities were found to be significantly increased by long-term exposure to DM. Meanwhile, the way that genes linked to the nuclear factor kappa-B immune signaling pathway showed a significant increase in the hepatopancreas (<em>dorsal, imd, pelle, ikkβ</em>), intestine (<em>imd, tube, pelle</em>), and muscle (<em>toll, imd, pelle</em>) of shrimp following exposure to DM. Similarly, cellular autophagy genes in the hepatopancreas (<em>atg9, atg12</em>), muscle (<em>atg3, atg9</em>), and intestine (<em>atg3, atg5, atg9, beclin, atg13</em>) were significantly upregulated in a dose-dependent manner after shrimp chronic exposure to DM. Histopathological damage was also induced in the muscles under DM exposure. In summary, chronic exposure to DM resulted in a slowing of growth performance, disruption of lipoprotein metabolism, impairment of hepatopancreatic, intestinal, and muscle-related immune functions, as well as the promotion of autophagy and damage to shrimp muscle.</p></div>","PeriodicalId":73763,"journal":{"name":"Journal of hazardous materials advances","volume":"15 ","pages":"Article 100456"},"PeriodicalIF":5.4,"publicationDate":"2024-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.sciencedirect.com/science/article/pii/S2772416624000573/pdfft?md5=596322a47aa8d3de166df8a0aa98fd48&pid=1-s2.0-S2772416624000573-main.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142098964","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Salinity acclimation of nitrifying microorganisms: Nitrification performance, microbial community, osmotic adaptation strategies","authors":"Zhi-Cheng Wu,&nbsp;Chun-Yu Lai,&nbsp;He-Ping Zhao","doi":"10.1016/j.hazadv.2024.100448","DOIUrl":"10.1016/j.hazadv.2024.100448","url":null,"abstract":"<div><p>Wastewater with high salinity (&gt; 1%) presents a significant challenge to conventional wastewater treatment, particularly for the nitrification process. However, the osmotic adaptation strategies of nitrifying microorganisms remain poorly understood. In this study, we examined the impacts of salinity on the ammonia and nitrite oxidation processes in wastewater. The biofilm samples without salinity acclimation (0 g NaCl/L), after 1% salinity acclimation (10 g NaCl/L), and after 3% salinity acclimation (30 g NaCl/L) were inoculated to conical flasks containing synthetic high-salt wastewater (30 g NaCl/L), respectively. The research findings indicate that, following the salinity acclimation of biofilm, the activity of ammonia oxidation surpassed that of nitrite oxidation. 16S rRNA gene amplicon analysis revealed a noteworthy increase in the abundance of <em>Nitrosomonas</em> (ammonia-oxidizing bacteria) and an unclassified ammonia-oxidizing archaeon within the <em>Nitrososphaeraceae</em> family. In contrast, <em>Nitrospira</em> (nitrite-oxidizing bacteria) exhibited a significant decrease (<em>p &lt; 0.01</em>). Metagenomic analysis indicates certain strains, such as <em>Nitrosomonas</em> sp. PL2, <em>Nitrosomonas mobilis</em> PL3, and <em>Nitrososphaeraceae</em> gen. sp. PL5, possessed various genes related to Na⁺ efflux, K⁺ uptake, glutamate synthesis or transport. However, <em>Nitrospira</em> sp. PL6 and <em>Nitrospira</em> sp. PL7 lacked K⁺ uptake genes. This study elucidates the microbial mechanisms underlying the variations in nitrification observed before and after salinity acclimation of biofilm, which helps to develop microbial evolution strategies to remove nitrogen pollutants under high salinity conditions.</p></div>","PeriodicalId":73763,"journal":{"name":"Journal of hazardous materials advances","volume":"15 ","pages":"Article 100448"},"PeriodicalIF":5.4,"publicationDate":"2024-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.sciencedirect.com/science/article/pii/S2772416624000494/pdfft?md5=e62150d59a307d89ecf7f9d0ecd88c4e&pid=1-s2.0-S2772416624000494-main.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141960828","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Wearable Kapton graphene biosensor for detection of toxic gases","authors":"Ilghar Rezaei ,&nbsp;Alireza Barati Haghverdi ,&nbsp;Ali Soldoozy ,&nbsp;Toktam Aghaee ,&nbsp;Sadegh Biabanifard","doi":"10.1016/j.hazadv.2024.100452","DOIUrl":"10.1016/j.hazadv.2024.100452","url":null,"abstract":"<div><p>Toxic gases cause a significant number of human deaths every year across the globe. Different types of harmful substances can affect individuals in various ways. Inhaling these gases can have harmful consequences for the body, leading to physiological changes or even death. As a preliminary measure, a simulation application is utilized to detect certain gases by utilizing small-scale and flexible architectures, along with advanced detection techniques. The active material used in this study is a patch of emitting graphene embedded on a polyimide film (Kapton), which helps to determine the frequency of the RF Planar Resonant Structure. We plan to utilize the graphene-Kapton sensor for conducting non-invasive testing. The device has been tested for detecting and recognizing various dangerous and toxic gases, including Fluorine azide (F2N), Hydrogen Iodide (HI), Nitrogen (N2), Methane (CH4), and Carbon monoxide (CO). The simulation results suggest that the Graphene-Kapton flexible sensor provides excellent detection performance. The sensor can accurately identify each gas based on its distinct characteristics. Furthermore, ample sensitivity analysis against geometrical parameters and external electrical stimulation is performed to show the robustness and reliability of the proposed structure.</p></div>","PeriodicalId":73763,"journal":{"name":"Journal of hazardous materials advances","volume":"15 ","pages":"Article 100452"},"PeriodicalIF":5.4,"publicationDate":"2024-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.sciencedirect.com/science/article/pii/S2772416624000536/pdfft?md5=91a87fb2c7a16feabfe963207126110b&pid=1-s2.0-S2772416624000536-main.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141998465","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Assessment of polycyclic aromatic hydrocarbon (PAH) levels and health risks in kitchen dust from wood, kerosene, and gas cooking systems in Cumilla, Bangladesh","authors":"G.M.M. Anwarul Hasan ,&nbsp;Farhana Rinky ,&nbsp;Anuj Kumer Das ,&nbsp;Khondoker Shahin Ahmed ,&nbsp;Kiron Sikdar","doi":"10.1016/j.hazadv.2024.100457","DOIUrl":"10.1016/j.hazadv.2024.100457","url":null,"abstract":"<div><p>This study investigates the presence of polycyclic aromatic hydrocarbons (PAHs) in kitchen dust from households in the Cumilla District of Bangladesh, utilizing three different cooking systems: wood, kerosene, and gas. Sixty dust samples were collected from various kitchen surfaces and analyzed for 18 PAH compounds. The extraction and analysis of PAHs were performed using gas chromatography-mass spectrometry (GC-MS) with selective ion monitoring (SIM) mode. The results indicated significant variations in PAH concentrations across different cooking systems, with the highest levels observed in kitchens using wood stoves, followed by kerosene and gas stoves. Diagnostic ratios were used to identify the sources of PAHs, revealing a combination of pyrogenic and petrogenic origins. Health risk assessments, including Incremental Lifetime Cancer Risk (ILCR) and Hazard Index (HI), were conducted to evaluate the potential risks associated with PAH exposure. The findings demonstrated a higher carcinogenic risk associated with wood stove systems, while kerosene and gas systems posed comparatively lower risks. The study's findings have practical implications for public health and policy development, as they underscore the need for continuous monitoring of indoor PAH levels and the development of policies to mitigate exposure, highlighting the critical importance of addressing indoor pollution to ensure public health safety.</p></div>","PeriodicalId":73763,"journal":{"name":"Journal of hazardous materials advances","volume":"15 ","pages":"Article 100457"},"PeriodicalIF":5.4,"publicationDate":"2024-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.sciencedirect.com/science/article/pii/S2772416624000585/pdfft?md5=6f39458777b60b4b631601c15cf0acc8&pid=1-s2.0-S2772416624000585-main.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142098963","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Dermatitis, a nightmare for those exposed to environmental pollutants","authors":"Amir Hossein Khoshakhlagh ,&nbsp;Mahdiyeh Mohammadzadeh ,&nbsp;Agnieszka Gruszecka-Kosowska","doi":"10.1016/j.hazadv.2024.100454","DOIUrl":"10.1016/j.hazadv.2024.100454","url":null,"abstract":"<div><p>The increase in occupational, environmental, and prenatal exposure of humans to environmental pollutants in recent years has been associated with an increase in the incidence or aggravation of dermatitis symptoms in different age groups. The present systematic review was conducted with the aim of obtaining studies related to the impact of occupational, environmental, and prenatal exposure to volatile organic compounds (VOCs), solvents, and metals on dermatitis. To identify relevant studies, a systematic search was conducted in Scopus, PubMed, Web of Science, Medline, and Embase databases until January 11, 2024 (without date limit). The Population, Exposure, Comparator, and Outcomes (PECO) statement was formed to create a comprehensive and efficient research question and studies that did not meet the PECO criteria were excluded. In addition, the quality of the articles was assessed using the Joanna Briggs Institute (JBI) specific checklist and the possibility of risk of bias using the ROB tool. Finally, the eligible studies were discussed according to the type of pollutant. After detailed reviews, 86 eligible studies were considered for inclusion in the present systematic review. A review of studies showed that 66 % (<em>N</em> = 57) of the eligible articles were of high quality (Q1) and 58.13 % (<em>N</em> = 50) were classified as high ROB. The results indicated that chronic exposure to VOCs, solvents, and metals can play an effective role in incidence and aggravation of dermatitis symptoms, especially atopic dermatitis and eczema, in all age groups. However, exposure to some micronutrients, such as selenium and manganese, can positively improve community health. The results of this systematic review show the adverse effects of environmental pollutants on dermatitis, which can negatively affect people's self-esteem and occupational/educational performance. Therefore, it is very necessary to adopt strict approaches to comply with environmental standards and prevent chronic exposure to contaminants, especially in pregnant women and employees.</p></div>","PeriodicalId":73763,"journal":{"name":"Journal of hazardous materials advances","volume":"15 ","pages":"Article 100454"},"PeriodicalIF":5.4,"publicationDate":"2024-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.sciencedirect.com/science/article/pii/S277241662400055X/pdfft?md5=e4e10c0a8e4f0d018e101088d11c8c24&pid=1-s2.0-S277241662400055X-main.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142098965","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Utilization of local corn (Zea Mays) wastes for bioethanol production by separate hydrolysis and fermentation","authors":"Adewale Allen Sokan-Adeaga ,&nbsp;Serifat Adenike Salami ,&nbsp;David Olalekan Bolade ,&nbsp;Muhammad Aledeh ,&nbsp;Micheal Ayodeji Sokan-Adeaga ,&nbsp;Oluwatosin Emmanuel Amubieya ,&nbsp;Samuel Abiodun Kehinde ,&nbsp;Mahdi Farzadkia ,&nbsp;Ghulam Md Ashraf ,&nbsp;Edris Hoseinzadeh","doi":"10.1016/j.hazadv.2024.100447","DOIUrl":"10.1016/j.hazadv.2024.100447","url":null,"abstract":"<div><p>Maize is the second most-common crop globally. Thus, enormous maize cobs are generated annually from maize processing activities which could serve as a potential and non-edible source for biofuel production. The primary aim of this research was to assess the practicality of producing bioethanol from discarded maize cob through a distinct two-step process referred to as separate hydrolysis and co-fermentation. After a 72-hour fermentation period, the greatest ethanol yield of 66.23 ± 8.35 mL/kg was obtained. This was followed by 54.33 ± 7.27 35 mL/kg after 48 h, and 21.68 ± 2.97 35 mL/kg after 24 h. Importantly, all ethanol yields at different time points exhibited statistical significance at <em>p</em> &lt; 0.05. Moreover, the study revealed a robust positive correlation (<em>r</em> = 0.99, <em>p</em> &lt; 0.01) between glucose and Total reducing Sugars (TRS) yields, and negative correlations were observed between ethanol yield and glucose (<em>r</em> = -0.97, <em>p</em> &lt; 0.05) as well as ethanol and TRS (<em>r</em> = -0.98, <em>p</em> &lt; 0.05). The results indicate the potential of maize cob waste as a valuable resource for bioethanol production. Significant enhancements in operational processes are necessary to enhance the economic feasibility of producing ethanol from maize cobs. Nigeria's utilization of waste for biofuel production is bolstered by substantial policy and financial backing for renewable fuels. The economic viability of ethanol production from maize cobs relies heavily on its competitiveness relative to other waste treatment methods and the effectiveness of policy measures.</p></div>","PeriodicalId":73763,"journal":{"name":"Journal of hazardous materials advances","volume":"15 ","pages":"Article 100447"},"PeriodicalIF":5.4,"publicationDate":"2024-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.sciencedirect.com/science/article/pii/S2772416624000482/pdfft?md5=bd3db69217a4d3869953a723009c00b9&pid=1-s2.0-S2772416624000482-main.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141847128","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Synthesis and characterization of alkali-activated binders with slag and waste printed circuit board","authors":"Gummapalli Basha,&nbsp;Nabil Hossiney","doi":"10.1016/j.hazadv.2024.100455","DOIUrl":"10.1016/j.hazadv.2024.100455","url":null,"abstract":"<div><p>The global production of printed circuit board (PCB) is expected to rise substantially in the next decade due to the advancement in technology. The production of PCB results in generation of hazardous waste of various kinds, and one such waste is the very fine particles of the board material that is generated due to drilling and other preparatory operations. The disposal of such waste in the environment can result in serious consequences which needs attention. Therefore, recycling of waste printed circuit board (WPCB) can mitigate its harmful effects on the environment and also reduce the remediation costs. In this study, the WPCB is used as a substitute to ground granulated blast furnace slag (GGBFS) in development of alkali-activated binder. Alkali-activated binder was synthesized with GGBFS, WPCB, sodium hydroxide sol. (NaOH), and sodium silicate sol. (Na₂SiO₃). GGBFS was replaced with WPCB at replacement rates of 0%, 10%, 20%, and 30% by volume. Additionally, the effect of varying concentration of NaOH and Na₂SiO₃ on the physical and mechanical performance of the binder was studied. The developed binders were evaluated for workability, strength, water absorption, and efflorescence properties. Further, to ascertain its safety on the environment, the toxicity characteristic leaching procedure (TCLP) test was also performed. The results indicate that WPCB characteristics are compatible with GGBFS in terms of its particle size distribution. Moreover, the replacement of GGBFS with up to 20% WPCB provides desirable properties for the alkali-activated binder. However, higher replacements are not recommended, since it had detrimental effect on the mechanical performance of the binder. The study revealed that desirable performance can be achieved for binders with 8 M NaOH and with Na₂SiO₃ to NaOH ratio of 2, and up to 20% GGBFS replaced with WPCB. The results of TCLP test disclose that the contaminant in the leachate from alkali-activated binders with WPCB are within regulatory limits, and do not pose any threat to the environment. Finally, the outcome of this study provides an innovative approach towards formulation of eco-friendly binder for various construction applications such as foundations, buildings, bridges, pavements, etc.</p></div>","PeriodicalId":73763,"journal":{"name":"Journal of hazardous materials advances","volume":"15 ","pages":"Article 100455"},"PeriodicalIF":5.4,"publicationDate":"2024-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.sciencedirect.com/science/article/pii/S2772416624000561/pdfft?md5=52bbfb2c206bdd844660aa776ca28e88&pid=1-s2.0-S2772416624000561-main.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142089388","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Application of MoS42−intercalated magnetic layered double hydroxide for preconcentration of cadmium and lead from water samples","authors":"Boitumelo Prudence Khunou ,&nbsp;Philiswa Nosizo Nomngongo ,&nbsp;Luthando Nyaba","doi":"10.1016/j.hazadv.2024.100446","DOIUrl":"10.1016/j.hazadv.2024.100446","url":null,"abstract":"<div><p>A MoS₄²⁻-intercalated magnetic FeMgAl layered double hydroxide (Fe₃O₄@MoS₄²⁻-FeMgAl LDH) nanocomposite was synthesised via hydrothermal assisted exfoliation. The material was applied as the adsorbent for extraction, preconcentration and removal of cadmium ions (Cd²⁺) and lead ions Pb²⁺ from wastewater and river water. The structural properties and morphologies of the adsorbent were determined by transmission electron microscopy (TEM), scanning electron microscopy coupled with energy dispersive spectroscopy (SEM/EDS), Fourier transform infrared spectroscopy (FTIR), zeta potential and X-ray diffraction (XRD). The parameters influencing preconcentration and the adsorptive removal process were optimised using the central composite design (CCD) method. The concentration of Cd²⁺ and Pb²⁺ in the samples was determined using inductively coupled plasma optical emission spectrometry (ICP-OES). The preconcentration method developed in the study was ultrasound-assisted magnetic solid phase extraction (UA-MSPE). Under optimum conditions, linearity was 0.1-800 µg/L with a correlation of determination (R²) of 0.9987. The uncertainty of the slope and the uncertainty of the intercept were both lower than the uncertainty of the calibration indicating good precision, selection of standards closest to a blank and wide range. Precision expressed as %RSD for both intra-day (n = 27) and inter-day (n = 9) were found to be 3.3 % and 7.0 % respectively. The limit of detection (n = 10) and limit of quantification (n = 10) of the UA-MSPE/ICP-OES were 0.03 µg/L and 0.10 µg/L. The developed method was applied for real sample analysis. Herein, influent wastewater was reported as 1.77 ± 0.14 and 6.53 ± 0.33 ug/L for Cd²⁺ and Pb²⁺, respectively while the effluent was reported at 0.96 ± 0.07 and 2.57 ± 0.13 ug/L, respectively. River water samples were found to be 0.45 ± 0.01 and 1.23 ± 0.04 ug/L, respectively proving that the adsorbent is capable of preconcentrating the target analytes.</p></div>","PeriodicalId":73763,"journal":{"name":"Journal of hazardous materials advances","volume":"15 ","pages":"Article 100446"},"PeriodicalIF":5.4,"publicationDate":"2024-07-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.sciencedirect.com/science/article/pii/S2772416624000470/pdfft?md5=042369489db48c91fd948bcaff44a43e&pid=1-s2.0-S2772416624000470-main.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141728624","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}