Water Cycle最新文献

{"title":"Novel magnetically recoverable MnFe2O4/TiO2 nanocomposites synthesized using green route for photocatalytic degradation of methylene blue","authors":"Deska Lismawenning Puspitarum ,&nbsp;Nurul Imani Istiqomah ,&nbsp;Dyah Ayu Larasati ,&nbsp;Nining Sumawati Asri ,&nbsp;Julia Angel ,&nbsp;Ahmad Kusumaatmaja ,&nbsp;Edi Suharyadi","doi":"10.1016/j.watcyc.2024.11.001","DOIUrl":"10.1016/j.watcyc.2024.11.001","url":null,"abstract":"<div><div>The photocatalytic degradation of hazardous organic dyes was investigated using green-produced MnFe₂O₄/TiO₂ nanocomposites, which demonstrated magnetic reusability and separability, making them efficient photocatalysts for rapid UV degradation. The MnFe₂O₄/TiO₂ diffraction peaks indicated a single-phase cubic spinel structure, with crystallite sizes spanning from 5.3 to 7.1 nm. The TiO₂ anatase phase showed typical peaks at 25.8° and 48.2°, corresponding to the (110) and (200) diffraction planes, respectively. The transmission electron microscopy image of MnFe₂O₄/TiO₂ revealed inter-grain aggregation between the particles. The particle size of MnFe₂O₄/TiO₂ exhibited a slight increase from 30 to 40 nm. MnFe₂O₄ appeared as black spheres, whereas TiO₂ appeared as grey circles. X-ray spectroscopy confirmed the matching of chemical elements. The bandgap of the nanocomposites decreased from 2.9 to 3.2 eV after the surface treatment with TiO₂, indicating an electronic transition between the two components. Furthermore, the addition of TiO₂ affected the saturation magnetization, which ranged from 7.6 to 11.2 emu/g. The nanocomposites clearly displayed superparamagnetic-like behavior. A photocatalytic investigation showed that MnFe₂O₄/TiO₂ nanoparticles exhibited higher photocatalytic activity than MnFe₂O₄ nanoparticles. Methylene blue dye was degraded by 98 % using the MnFe₂O₄/TiO₂ nanocomposites after 2 h of UV exposure. This photodegradation was further investigated using a Langmuir–Hinshelwood kinetic model, and it was discovered that the rate constant (<em>K</em>_<em>app</em>) increased with the TiO₂ concentration. The nanocomposites maintained over 90 % photocatalytic efficiency without any significant degradation after three reuse cycles. Therefore, green-synthesized MnFe₂O₄/TiO₂ nanocomposite photocatalysts for dye degradation are highly promising for the removal of harmful organic dyes from the environment.</div></div>","PeriodicalId":34143,"journal":{"name":"Water Cycle","volume":"6 ","pages":"Pages 49-60"},"PeriodicalIF":0.0,"publicationDate":"2025-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143105075","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":"Exploring the degradation mechanism of bisphenol-A with low Fe2+&H2O2 content and the toxicity evolution of oxidation intermediates","authors":"Rui Miao ,&nbsp;Yanfei Li ,&nbsp;Xin Zhang ,&nbsp;Haoxue Ran ,&nbsp;Yifan Yang ,&nbsp;Jinwen Wang ,&nbsp;Lei Wang ,&nbsp;Xiaorong Meng ,&nbsp;Danxi Huang","doi":"10.1016/j.watcyc.2025.05.005","DOIUrl":"10.1016/j.watcyc.2025.05.005","url":null,"abstract":"<div><div>Efficient and cost-effective removal of emerging contaminants from water bodies has become a global priority. This study assessed the degradation efficiency of bisphenol-A (BPA) at varying Fe²⁺&amp;H₂O₂ (molar ratio 1:1) concentrations. In addition, the degradation mechanism of BPA by Fe²⁺&amp;H₂O₂ and the evolution of toxicity in intermediates were examined. The results indicated that, no additional acid is needed, with a Fe²⁺&amp;H₂O₂ concentration at 0.15 mM and a reaction time of 20 min, and the degradation efficiency of BPA exceeded 90%; this is primarily because the oxidation still occurred when Fe²⁺&amp;H₂O₂ was added to neutral BPA solutions, possibly leading to the conversion of the active functional groups of BPA into carboxyl groups. The deprotonation of these carboxyl groups provided the acidic conditions necessary for Fenton oxidation, thereby possibly facilitating further degradation of BPA and the formation of more carboxyl-rich intermediates, replenishing acidity for Fenton reactions and promoting continuous oxidation. Moreover, highly toxic intermediates are likely to form during the degradation of BPA at a 0.05–0.1 mM Fe²⁺&amp;H₂O₂ concentrations, but this tendency decreases substantially with increasing Fe²⁺&amp;H₂O₂ concentrations. At a Fe²⁺&amp;H₂O₂ concentration of 0.2 mM, the intermediates were predominantly low-toxicity or even nontoxic. These findings highlight the importance of monitoring toxicity evolution and the conditions favorable for the formation of low-toxic or nontoxic intermediates in the removal of emerging contaminants. To further validate the applicability of this method, p-chloroxylenol (PCMX) and paracetamol (PAM) were also tested under identical conditions, and both showed high degradation efficiencies under neutral pH.</div></div>","PeriodicalId":34143,"journal":{"name":"Water Cycle","volume":"6 ","pages":"Pages 485-494"},"PeriodicalIF":0.0,"publicationDate":"2025-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144322389","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Virus contamination, removal characteristics and quantitative risk assessment from drinking water source to secondary water supply system","authors":"Shijie Yao ,&nbsp;Lingli Liu ,&nbsp;Chicheng Yan ,&nbsp;Tingyuan Zhang ,&nbsp;Jiaqin Yu ,&nbsp;Changzheng Cui","doi":"10.1016/j.watcyc.2024.11.004","DOIUrl":"10.1016/j.watcyc.2024.11.004","url":null,"abstract":"<div><div>The drinking water (DW) supply system is the last line of defense against virus infections for people's DW health. This study systematically evaluated the virus pollution characteristics and human health risks in the entire DW supply systems. The detection frequency range of the virus in DW was 5.30 %–71.21 %, and the concentration range at not detected (n.d.) - 1.45 × 10⁵ copies/L. DNA virus like adenovirus was more persistent than RNA viruses like norovirus and enterovirus in the DW system. Drinking water treatment plants (DWTPs) play a crucial role in reducing the target virus with degradation rates ranging from 47.09 % to 100 % when compared with the removal rates in DW source and secondary water supply (SWS). It was found the persistence and accumulation of the virus in the treated water from DWTPs to the downstream water transmission network. Principal component analysis showed that the virus contamination was positive correlation with water quality indexes like total phosphorus, total nitrogen, dissolved oxygen but negative correlation with temperature and the dose of free chlorine. Quantitative microbial risk assessment of adenovirus in the SWS showed that the DALYs/person/year of gastroenteritis ranged from 8.11 × 10⁻⁶ to 2.68 × 10⁻⁴ DALYs/person/year. Uncertainty analysis of different distributions of model inputs like virus concentrations showed the risk caused by adenovirus was changed appreciably for different person by using 100,000 Monte Carlo simulations. It is necessary to efficiently remove the virus in the DW systems to ensure human health for the direct ingestion of secondary water supply water.</div></div>","PeriodicalId":34143,"journal":{"name":"Water Cycle","volume":"6 ","pages":"Pages 95-104"},"PeriodicalIF":0.0,"publicationDate":"2025-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143636324","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 GIS-based multi-criteria decision analysis of hydro-geomorphological factors for flash flood susceptibility mapping in Bangladesh","authors":"Raihan Riaz ,&nbsp;Md. Mohiuddin","doi":"10.1016/j.watcyc.2024.09.003","DOIUrl":"10.1016/j.watcyc.2024.09.003","url":null,"abstract":"<div><div>Flash floods are one of the most prevalent natural disasters, triggering deadly damage to homesteads, crops, infrastructure, road networks, communications, and the natural environment in the <em>Haor</em> (Wetland) region of Bangladesh. The purpose of the study aims to identify eleven (11) hydro-geomorphological driving factors, namely elevation, slope, aspect, rainfall, land use and land cover (LULC), lithology, soil type, topographic wetness index (TWI), Normalized Difference Vegetation Index (NDVI), distance from the river, and drainage density, which are being explored for mapping flood-prone areas. This research has produced a flash flood susceptibility map using the Analytical Hierarchy Process (AHP) and Analytical Network Process (ANP), which are interactive decision-making approaches under multi-criteria decision analysis (MCDA) in ArcGIS 10.8. The findings of this study showed that the susceptibility to flood hazards differs significantly among the seven <em>Haor</em> districts. As a result of the ANP and AHP, a more significant proportion of the <em>Haor</em> region is moderately susceptible to flooding (8685.09–9275.15 sq. km.), whereas 35.34 %–38.32 % (7069.70–7668.67 sq. km.) accounts for high susceptible to flooding. Furthermore, 200 flood locations were identified in the northeast Haor region, where 140 (70 %) randomly selected floods were used for training, and the remaining 60 (30 %) were employed for validation purposes. The validation results showed that the AHP model had greater prediction accuracy (the area under the receiver operating curve (AUROC) = 92.1 %) than the ANP (AUROC = 88.5 %) model. Therefore, the study findings can be helpful for researchers, academics, policymakers, and planners for sustainable flood mitigation strategies, particularly in <em>Haor</em> areas.</div></div>","PeriodicalId":34143,"journal":{"name":"Water Cycle","volume":"6 ","pages":"Pages 13-27"},"PeriodicalIF":0.0,"publicationDate":"2025-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143105072","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":"Fe-doped biochars prepared via hydrothermal treatment and low-temperature air calcination to activate peroxymonosulfate for efficient tetracycline degradation","authors":"Chuanfan Yang,&nbsp;Zhaobing Liu,&nbsp;Ningjie Fang,&nbsp;Weili Yu,&nbsp;Chenxi Li,&nbsp;Yinghao Chu","doi":"10.1016/j.watcyc.2024.06.003","DOIUrl":"10.1016/j.watcyc.2024.06.003","url":null,"abstract":"<div><div>In this study, a new sludge-based biochar loaded with Fe species (Fe/SSBC) was prepared by a two-step process involving hydrothermal treatment and low-temperature air calcination, and used to degrade tetracycline (TC) by activating peroxymonosulfate (PMS). After 30 min reaction, more than 98 % TC (50 mg/L) could be removed by optimized Fe/SSBC/PMS system (k = 0.166 min⁻¹), which was 2.18 times compared with individual hydrothermal treatment (k = 0.076 min⁻¹). Besides, it also exhibited good stabilization. Detailed characterizations revealed the effect of hydrothermal treatment on the Fe–O coordination of the biochar surface and the change of the Fe valence state by air calcination. The electron paramagnetic resonance (EPR), electrochemical analysis and quenching experiments confirmed that singlet oxygen (¹O₂) was the main active substance. We further elucidated the influence of grafting Fe–O on the surface electron distribution of biochar by DFT calculations. Moreover, two possible pathways were proposed based on LC-MS analysis. In this study, a method of preparing high catalytic performance sludge-based carbon materials under low energy consumption has been proposed, which provides a new strategy for sludge recycling.</div></div>","PeriodicalId":34143,"journal":{"name":"Water Cycle","volume":"6 ","pages":"Pages 1-12"},"PeriodicalIF":0.0,"publicationDate":"2024-06-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142662717","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":"Performance and application of PS slow-release algal inhibition materials based on modified fly ash and cement","authors":"Zhaoliang Zhu ,&nbsp;Xinyu Ji ,&nbsp;Bingfang Shi ,&nbsp;Yonggang Li ,&nbsp;Ning Guo","doi":"10.1016/j.watcyc.2024.01.001","DOIUrl":"https://doi.org/10.1016/j.watcyc.2024.01.001","url":null,"abstract":"<div><p>In this paper, a new type of slow-release algae control agent was prepared by using modified fly ash and cement as the base material and PS (potassium persulfate), an inorganic substance that dissolves algae by destroying their cellular structure, as the active component, and compounding the three in a certain proportion, and the finished product was obtained after 14 days of maintenance. The rate of release is primarily influenced by temperature, particle size, and load, while pH has minimal impact. Specifically, as the temperature increases from 4 °C to 40 °C, the rate of slow release increases from 0.74 mg/g/d to 1.35 mg/g/d. When particle size increased from 3 mm to 5 mm, the slow-release rate decreased from 1.06 mg/g/d to 0.70 mg/g/d. When the load increased from 10 mg/g to 30 mg/g, the slow-release rate also increased from 0.60 mg/g/d to 2.10 mg/g/d. In the algal inhibition experiment, the composite material was selected with a dose of 20 g/L, a loading capacity of 15 mg/g, and a particle size of 3 mm. After 14 days, algae removal rates, ammonia nitrogen, total phosphorus, and COD were found to be 96.55 %, 56.14 %, 78.2 %, and 86.81 %, respectively. The microstructure, elemental composition, and distribution of functional groups in the materials were analyzed using SEM, EDS, and FTIR. The algal suppressor was evenly distributed throughout the substrate surface. Additionally, there was a decrease in metal elements and an increase in hydroxyl groups. The experimental data show that the material is a slow-release algal inhibitor with good performance and practical application value.</p></div>","PeriodicalId":34143,"journal":{"name":"Water Cycle","volume":"5 ","pages":"Pages 9-19"},"PeriodicalIF":0.0,"publicationDate":"2024-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.sciencedirect.com/science/article/pii/S2666445324000011/pdfft?md5=19bf18d648dff02861fe2c0c78d8520e&pid=1-s2.0-S2666445324000011-main.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139548746","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":"A selection guide for efficient graphene oxide-composite adsorbents","authors":"Jafar I. Abdelghani ,&nbsp;Fawwaz I. Khalili ,&nbsp;Nabil N. AL-Hashimi ,&nbsp;Amjad H. El-Sheikh ,&nbsp;Moayad A. Khwara","doi":"10.1016/j.watcyc.2024.06.001","DOIUrl":"10.1016/j.watcyc.2024.06.001","url":null,"abstract":"<div><p>Many adsorbents for various pollutants are now being developed, especially after the great developments in the nanotechnology. Therefore, there is an urgent need to develop a guide for selecting the most appropriate adsorbent from a practical standpoint. In fact, relying on the magnitude of adsorption capacity alone is not sufficient to decide the usability of an adsorbent in real applications. Based on this, a selection guide has been proposed to choose the most appropriate adsorbent based not only on the adsorption capacity but also on the other factors related to the batch process. This guide was proposed based on the exceptional performance of graphene oxide and graphene oxide composites (<em>Q</em>_max &gt;1000 mg/g) to sequestrate textile dyes, as evidenced by the recent literature. To create the guide, 74 graphene oxide-based adsorbents with high retention for 36 dyes of different classes were examined. The collected GO-adsorbents were classed into four groups according to the added substrates. From the experimental results, the guide's criteria for selecting the most practical adsorbent were set as follows: adsorption capacity ≥684 mg/g, solid to liquid ratio ≤0.9 g/L, equilibrium time ≤70 min, pH 10.0 for cationic dyes and 5.5 for anionic dyes, recyclability ≥5 cycles with a final efficiency ≥90 %, and ease recovery from solution by an external magnet or decantation. Based on the guide, the winner GO-adsorbents were tetrazolyl-octadecylamine-GO, polyethylenimine-polyvinyl alcohol-GO, and Fe₃O₄-triethylenetetramine-β-cyclodextrin-GO as they fulfill most of suggested criteria. Although the proposed guide was created for graphene oxide-dye system, similar guides for other systems would be created following the outlined strategy.</p></div>","PeriodicalId":34143,"journal":{"name":"Water Cycle","volume":"5 ","pages":"Pages 234-246"},"PeriodicalIF":0.0,"publicationDate":"2024-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.sciencedirect.com/science/article/pii/S2666445324000205/pdfft?md5=996587fdfe8b978aad2dd7c1b79e9f93&pid=1-s2.0-S2666445324000205-main.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141990464","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":"Neglected flow direction detection in landfill water cycle: Precise characterization of leachate distribution through joint inversion of electrical resistivity and self-potential data","authors":"Xiaochen Sun ,&nbsp;Xu Qian ,&nbsp;Ya Xu ,&nbsp;Changxin Nai ,&nbsp;Yuqiang Liu","doi":"10.1016/j.watcyc.2024.04.004","DOIUrl":"10.1016/j.watcyc.2024.04.004","url":null,"abstract":"<div><p>The leakage of leachate is a crucial but often overlooked hydrological process in the landfill water cycle. The concealed leakage of leachate not only leads to soil and groundwater pollution in surrounding areas but also affects the distribution of water and the metabolism of organic matter within the landfill. To accurately quantify this concealed hydrological process, we propose a method for detecting leachate leakage based on joint inversion of multi-source geophysical exploration data. By integrating multiple geophysical exploration data (resistivity and self-potential information), we reconcile the spatial differences in different exploration data to improve the accuracy of leachate and its pollution plume imaging. Additionally, we introduce an efficient alternating iteration technique within the joint inversion framework to ensure convergence of separately inverted models toward similar spatial structures. Simulation results indicate that: (1) for the early detection of small-scale high-concentration leachate pollution, the proposed confidence-induced joint inversion framework (CI-JIF) improves precision by 15.6 % compared to separate inversions. (2) for the detection of leachate long-term diffusion, CI-JIF accurately delineates the distribution of widespread high-concentration leachate, improving precision by 17.4 % compared to separate inversions. Further on-site experiments demonstrate that CI-JIF can more accurately reconstruct the distribution of leachate.</p></div>","PeriodicalId":34143,"journal":{"name":"Water Cycle","volume":"5 ","pages":"Pages 223-233"},"PeriodicalIF":0.0,"publicationDate":"2024-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.sciencedirect.com/science/article/pii/S2666445324000163/pdfft?md5=0ca62098cfcb30f8ed4c4d1c97c926d2&pid=1-s2.0-S2666445324000163-main.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141630175","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":"Effect of confined Mn oxides on regulating capability of activated coke for persulfate-based oxidation of a sweetener acesulfame","authors":"Guoting Li ,&nbsp;Haozhe Li ,&nbsp;Shude Zhang ,&nbsp;Xiao Mi ,&nbsp;Yujie Guo ,&nbsp;Zhixin Song ,&nbsp;Yuhao Liu ,&nbsp;Hongwei Pan ,&nbsp;Baogui Wang ,&nbsp;Yingxu Liu ,&nbsp;Weigao Zhao ,&nbsp;Tannaz Pak","doi":"10.1016/j.watcyc.2024.07.002","DOIUrl":"10.1016/j.watcyc.2024.07.002","url":null,"abstract":"<div><p>Mn oxides are confined within the porous structure of activated coke (ACO) via impregnation followed by calcination treatment. The Mn-ACO sample calcined at 600 °C (Mn-ACO600) demonstrated superior performance despite containing only a minute atomic ratio of 0.11 % Mn on its surface. This treatment led to a slight increase in the specific surface area and pore volume of ACO, with a significant enhancement in the proportion of micropores, rising from 54.2 % in ACO to 71.8 % in Mn-ACO600. Raman spectroscopy indicated additional defects in Mn-ACO, while XPS analysis confirmed the coexistence of Mn(II), Mn(III), and Mn(IV) oxides. Although ACO adsorption alone was ineffective in removing acesulfame (ACE), Mn-ACO600 achieved a removal rate of 19.0 %. The introduction of peroxydisulfate (PDS) further boosted the degradation of Mn-ACO600, with a <em>K</em>_<em>app</em> value that was 2.28 times of that of the combined Mn-ACO600 adsorption and PDS oxidation process, indicating a remarkable synergistic effect. To optimize the experimental conditions, a response surface methodology design analysis was conducted, revealing that solution pH and the dosage of Mn-ACO600 were crucial factors. Furthermore, the study confirmed non-radical oxidizing species, such as ¹O₂ and h⁺, played a predominant role in the process, with relatively minor contributions from radical oxidizing species.</p></div>","PeriodicalId":34143,"journal":{"name":"Water Cycle","volume":"5 ","pages":"Pages 247-258"},"PeriodicalIF":0.0,"publicationDate":"2024-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.sciencedirect.com/science/article/pii/S2666445324000254/pdfft?md5=a4ca56dfcd3516b40dfe874071ffaba2&pid=1-s2.0-S2666445324000254-main.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141709396","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":"Evaluation of physical and heavy metal contamination and their distribution in waters around Maddhapara Granite Mine, Bangladesh","authors":"Hossain Al Tanjil ,&nbsp;Sigma Akter ,&nbsp;Md Shimul Hossain ,&nbsp;Ashik Iqbal","doi":"10.1016/j.watcyc.2024.08.002","DOIUrl":"10.1016/j.watcyc.2024.08.002","url":null,"abstract":"<div><div>The Maddhapara Granite Mine is a significant contributor to Bangladesh's economy, causing considerable environmental concern due to the discharge of untreated mine water. This water presents possible hazards to local ecosystems, agriculture, and public health. For this investigation, we obtained water samples from 15 distinct places in the vicinity of the granite mine. A comprehensive analysis of the physicochemical properties was conducted including pH, turbidity, electrical conductivity (EC), total dissolved solids (TDS), and dissolved oxygen (DO) and an Atomic Absorption Spectrometer to quantify the heavy metals’ levels, specifically Ni, Zn, Fe, Pb, Cu, and Cr, following the requirements set by the World Health Organization (WHO), Food and Agriculture Organization (FAO), and Department of Energy (DoE) in Bangladesh. The study was carried out on various pollution indices i.e., Heavy Metal Pollution Index (HPI), Heavy Metal Evaluation Index (HEI), and Degree of Contamination (C_d). The pH of the samples varied from 6.27 to 8.86. Furthermore, the samples’ TDS and EC ranged from 36 mg/l to 392.56 mg/l and 102.78 μS/cm to 611.51 μS/cm, respectively. The HPI values exhibited substantial variation, with the highest HPI-a (WHO) measuring 52215.6, indicating a severe level of heavy metal contamination. Similarly, the HEI-a (WHO) reached a maximum value of 1252.45, while the highest contamination degree (C_d-a, WHO) was 1248.45 and these results are beyond the acceptable limits for human consumption and ecological balance. Immediate actions are required to develop treatment technologies and management strategies to prevent the potential health risks associated with using untreated mine wastewater.</div></div>","PeriodicalId":34143,"journal":{"name":"Water Cycle","volume":"5 ","pages":"Pages 286-296"},"PeriodicalIF":0.0,"publicationDate":"2024-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.sciencedirect.com/science/article/pii/S2666445324000278/pdfft?md5=4850412325e0e3a11c0edce8c4ed5815&pid=1-s2.0-S2666445324000278-main.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142312391","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}