Groundwater for Sustainable Development最新文献_第8页

Integrating aquifer vulnerability and explainable machine learning for spatial prediction of groundwater fluoride 基于含水层脆弱性和可解释性机器学习的地下水氟化物空间预测

IF 4.9

Groundwater for Sustainable Development Pub Date : 2025-11-01 Epub Date: 2025-09-24 DOI: 10.1016/j.gsd.2025.101517

Hanxiang Xiong , Yi Li , Ruihan Xiong , He Xiong , Jiayao Tan , Shilong Yang , Hanting Liu , Xiaoqing Song , Xu Guo

{"title":"Integrating aquifer vulnerability and explainable machine learning for spatial prediction of groundwater fluoride","authors":"Hanxiang Xiong , Yi Li , Ruihan Xiong , He Xiong , Jiayao Tan , Shilong Yang , Hanting Liu , Xiaoqing Song , Xu Guo","doi":"10.1016/j.gsd.2025.101517","DOIUrl":"10.1016/j.gsd.2025.101517","url":null,"abstract":"<div><div>Groundwater fluoride (F<sup>−</sup>) contamination has serious risks to public health and environmental sustainability. This study enhances spatial prediction of fluoride concentration (SPFC) in the Ordos Basin, northwest China, by applying a Light Gradient Boosting Machine (LGBM) model integrated with SHapley Additive exPlanations (SHAP) analysis. A total of 26 hydrological, geological, environmental, climatic, hydro-chemical, and anthropogenic indicators were incorporated. Key findings reveal that high fluoride concentrations (>1 mg/L) cover approximately 17.48 % of the basin, while moderate (0.5–1 mg/L) and low (<0.5 mg/L) concentrations account for 39.05 % and 43.47 % of the area, respectively. The LGBM model demonstrated high predictive accuracy with R<sup>2</sup> values of 0.9180 for the training set and 0.7579 for the validation set, and RMSE values of 0.0582 and 0.0748, respectively. SHAP analysis identified significant contributors to F<sup>−</sup> contamination, including hydro-chemical indicators (CMSH: 9.09 %, SAR: 5.45 %, TDS: 5.97 %, Na<sup>+</sup>: 5.71 %, pH: 4.94, Ca<sup>2+</sup>: 4.68 % and CAI: 4.68 %), socio-economic factors (population density: 5.19 % and GDP: 5.19 %), topographic factors (elevation: 4.42 %, TWI: 7.53 % and proximity to rivers: 6.75 %) and NDVI (4.94 %). Finally, an innovative matrix-based sustainable groundwater management (SGWM) framework was developed, integrating SPFC, IAV and groundwater storage (GWS) to delineate seven distinct management zones. This comprehensive approach from SPFC to SGWM significantly enhances the predictive accuracy and practical applicability of groundwater management strategies, providing a robust tool for addressing F<sup>−</sup> contamination and supporting the achievement of global health and environmental sustainability goals under the sustainable development goals (SDGs).</div></div>","PeriodicalId":37879,"journal":{"name":"Groundwater for Sustainable Development","volume":"31 ","pages":"Article 101517"},"PeriodicalIF":4.9,"publicationDate":"2025-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145158115","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}

引用次数: 0

Approach to mapping groundwater-dependent ecosystems through machine learning in central Chile 通过机器学习在智利中部绘制地下水依赖生态系统的方法

IF 4.9

Groundwater for Sustainable Development Pub Date : 2025-11-01 Epub Date: 2025-10-03 DOI: 10.1016/j.gsd.2025.101526

Iongel Duran-Llacer , Víctor Gómez-Escalonilla Canales , Marcelo Aliaga-Alvarado , José Luis Arumí , Francisco Zambrano , Lien Rodríguez-López , Rebeca Martínez-Retureta , Pedro Martínez-Santos

{"title":"Approach to mapping groundwater-dependent ecosystems through machine learning in central Chile","authors":"Iongel Duran-Llacer , Víctor Gómez-Escalonilla Canales , Marcelo Aliaga-Alvarado , José Luis Arumí , Francisco Zambrano , Lien Rodríguez-López , Rebeca Martínez-Retureta , Pedro Martínez-Santos","doi":"10.1016/j.gsd.2025.101526","DOIUrl":"10.1016/j.gsd.2025.101526","url":null,"abstract":"<div><div>Groundwater depletion can significantly impact the ecological integrity of groundwater-dependent ecosystems (GDEs). Identifying and mapping these ecosystems is essential for their effective management and conservation. This study presents a new probabilistic approach that uses machine learning techniques to predict the presence of GDEs zones in the Ligua and Petorca basins, central Chile. A comprehensive set of 21 spatially distributed explanatory variables related to GDEs occurrence was compiled. These include geology, topography, climate, and satellite-based indices. Using a dataset of 3067 GDEs presence/absence points, 16 supervised classification algorithms were trained and evaluated with randomly selected subsets containing 100 %, 75 %, 50 %, and 25 % of the original dataset. This analysis involved collinearity assessment, cross-validation, feature selection, and hyperparameter tuning. Tree-based ensemble models, including Random Forest (RFC), AdaBoost (ABC), Gradient Boosting (GBC), and ExtraTrees (ETC), consistently outperformed other classifiers. In all subsets, regardless of the number of samples included, the models obtained raw scores above 0.90 for metrics such as test score, F1 score and the area under the curve (AUC), with key predictor variables identified as distance to rivers, rainfall, and land use/land cover. The models show high predictive performance consistently exceeding 0.95 on the above metrics. The resulting GDEs map manages to identify areas with a high probability of GDEs presence, clearly differentiating these ecosystems from adjacent agricultural areas. This study provides a robust methodological framework for GDEs mapping and serves as a valuable tool to manage and protect groundwater and GDEs in arid and semi-arid environments.</div></div>","PeriodicalId":37879,"journal":{"name":"Groundwater for Sustainable Development","volume":"31 ","pages":"Article 101526"},"PeriodicalIF":4.9,"publicationDate":"2025-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145265921","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}

引用次数: 0

Assessment of deep-water wells drawdown: A case study of legedadi deep well field phase I, Addis Ababa, Ethiopia 深水井降水评估：以埃塞俄比亚亚的斯亚贝巴leggedadi深井油田一期为例

IF 4.9

Groundwater for Sustainable Development Pub Date : 2025-11-01 Epub Date: 2025-10-28 DOI: 10.1016/j.gsd.2025.101539

Abenezer Zelalem , Abebe Worku , Solomon Tibebu

{"title":"Assessment of deep-water wells drawdown: A case study of legedadi deep well field phase I, Addis Ababa, Ethiopia","authors":"Abenezer Zelalem , Abebe Worku , Solomon Tibebu","doi":"10.1016/j.gsd.2025.101539","DOIUrl":"10.1016/j.gsd.2025.101539","url":null,"abstract":"<div><div>This study presents a comprehensive assessment of groundwater sustainability and operational performance in the Legedadi Deep Well Field Phase I, a key water supply source for Addis Ababa, Ethiopia. Between 2017 and 2024, groundwater level data revealed an average drawdown of 51.06 ± 22.74 m across functional wells, with the most extreme case (LLA3) declining by 112.9 m. Flow rates declined by 28 %, and pump efficiency ranged between 38 % and 72 %, with most wells falling below ANSI/HI standards. Energy consumption in several wells exceeded the sustainable threshold of 0.5 kWh/m<sup>3</sup> in several wells, indicating high operational inefficiencies. Unregulated 24-h pumping, failure of the Supervisory Control and Data Acquisition (SCADA) system, and lack of preventive maintenance contributed to resource overuse and delayed response to operational failures. While initial empirical recharge estimates indicated a surplus, corrected estimates using a factor of 0.15 showed annual effective recharge between 8.86 and 18.60 million m<sup>3</sup>, potentially less than extraction volumes. Power interruptions and electromechanical failures between July and November 2024 caused a total of 1.59 million m<sup>3</sup> of lost production. Although land-use change was minimal (0.81 %), urban expansion remains a future risk to recharge zones. Recommendations include restoring SCADA functionality, enforcing rotational pumping schedules, improving pump efficiency, implementing Managed Aquifer Recharge (MAR), and strengthening institutional preventive maintenance. These evidence-based interventions support sustainable groundwater management in rapidly urbanizing and water-stressed environments.</div></div>","PeriodicalId":37879,"journal":{"name":"Groundwater for Sustainable Development","volume":"31 ","pages":"Article 101539"},"PeriodicalIF":4.9,"publicationDate":"2025-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145416232","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}

引用次数: 0

Delineation of groundwater potential zones in hard rock terrains using geospatial techniques and AHP method: A case study from Notse, southern Togo, West Africa 基于地理空间技术和层次分析法的硬岩地形地下水潜势区圈定——以西非多哥南部Notse地区为例

IF 4.9

Groundwater for Sustainable Development Pub Date : 2025-11-01 Epub Date: 2025-08-14 DOI: 10.1016/j.gsd.2025.101503

Komlavi Eyram Agbotsou , Ayyagari Venkata Surya Satya Anand , Mozimwè Ani , Bendalam Moulika , Edupuganti Naga Dhanamjaya Rao , Kissao Gnandi

{"title":"Delineation of groundwater potential zones in hard rock terrains using geospatial techniques and AHP method: A case study from Notse, southern Togo, West Africa","authors":"Komlavi Eyram Agbotsou , Ayyagari Venkata Surya Satya Anand , Mozimwè Ani , Bendalam Moulika , Edupuganti Naga Dhanamjaya Rao , Kissao Gnandi","doi":"10.1016/j.gsd.2025.101503","DOIUrl":"10.1016/j.gsd.2025.101503","url":null,"abstract":"<div><div>Groundwater is essential for human survival and sustainable development. While surface water studies are well documented, knowledge of groundwater resources remains limited. Identifying groundwater potential is key to meeting current and future water demands. This study applied geospatial techniques and the AHP method to delineate groundwater potential zones. Twelve thematic layers were integrated: geomorphology, lithology, slope, lineament density, drainage density, rainfall, distance from rivers, topographic wetness index (TWI), soil type, land use land cover (LULC), curvature and elevation. Results indicate that 66.02 % of the study area has low groundwater potential, 33.94 % has moderate potential and only 0.04 % is classified as high potential. Map-removal and single-parameters sensitivity analyses confirm the stability of the AHP model. Validation using borehole data and the ROC curve analysis confirms strong agreement (90 % and 87.5 %) with the predicted zones, demonstrating the model’s reliability for groundwater potential assessment in Notse. These findings offer a scientific foundation for developing sustainable groundwater management strategies, aligned with Sustainable Development Goals (SDG) 2 and 6</div></div>","PeriodicalId":37879,"journal":{"name":"Groundwater for Sustainable Development","volume":"31 ","pages":"Article 101503"},"PeriodicalIF":4.9,"publicationDate":"2025-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144864071","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}

引用次数: 0

Misiones lateritic soil as a safely disposable, single-use adsorbent for arsenate removal 将红土作为一种安全的一次性吸附剂，用于去除砷酸盐

IF 4.9

Groundwater for Sustainable Development Pub Date : 2025-11-01 Epub Date: 2025-10-13 DOI: 10.1016/j.gsd.2025.101535

R. Boglione , M.C. Panigatti , C. Griffa , S. Keller , M.C. Schierano , M. Asforno , M. Farías , F.D. Reina , E.B. Halac , A.L. Marzocca , P.N. Alderete , P.C.V. Sánchez , E.G. De Seta , J.M. Meichtry

{"title":"Misiones lateritic soil as a safely disposable, single-use adsorbent for arsenate removal","authors":"R. Boglione , M.C. Panigatti , C. Griffa , S. Keller , M.C. Schierano , M. Asforno , M. Farías , F.D. Reina , E.B. Halac , A.L. Marzocca , P.N. Alderete , P.C.V. Sánchez , E.G. De Seta , J.M. Meichtry","doi":"10.1016/j.gsd.2025.101535","DOIUrl":"10.1016/j.gsd.2025.101535","url":null,"abstract":"<div><div>Lateritic soil (LS) from Misiones province, Argentina, was evaluated as a single-use, safely disposable adsorbent for pentavalent arsenic (As(V)) removal on three different systems:1) synthetic solutions at [As(V)]<sub>0</sub> ≤ 10 mg L<sup>−1</sup> and pH 6.5 (LSL); 2) synthetic solutions at [As(V)]<sub>0</sub> ≤ 50 mg L<sup>−1</sup> and pH 2 (LSH); and 3) three different groundwaters obtained nearby Rafaela city (Santa Fe, Argentina), with [As(V)]<sub>0</sub> ≤ 0.165 mg L<sup>−1</sup> and 7 < pH < 8 (LSR). Adsorption equilibrium followed the Langmuir isotherm, with <em>q</em><sub>max</sub> = 0.44 mg As g<sup>−1</sup> and <em>K</em><sub>L</sub> = 51 mg<sup>−1</sup> L for LSL, and <em>q</em><sub>max</sub> = 2.1 mg As g<sup>−1</sup> and <em>K</em><sub>L</sub> = 0.6 mg<sup>−1</sup> L mg for LSH. In LSR, an up to 47 times decrease in adsorbed As(V) (<em>q</em><sub>e</sub>) was observed, attributable to the presence of interfering ions. Desorption with 0.10 M hydrochloric acid (HCl), acetic acid (HAc) and sodium hydroxide (NaOH) showed that NaOH achieved over 72 % As(V) release, while with HAc and HCl was <10 %, indicating near irreversible adsorption. As(V) concentrations in HCl and HAc leachates from LSL and LSR remained below the 1 mg L<sup>−1</sup> limit for hazardous waste; for LSH, this limit was surpassed. Kinetic experiments with LSL showed that, after 1 h, desorbed As(V) peaked to 0.2 and 0.07 mg L<sup>−1</sup> for HCl and HAc, respectively, followed by gradual re-adsorption onto precipitated iron oxy-hydroxides until [As(V)] ≤ 0.06 mg L<sup>−1</sup> after 24 h. These results support the suitability of LS as a single-use, safely disposable adsorbent for treating waters with low As(V) concentrations.</div></div>","PeriodicalId":37879,"journal":{"name":"Groundwater for Sustainable Development","volume":"31 ","pages":"Article 101535"},"PeriodicalIF":4.9,"publicationDate":"2025-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145319488","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}

引用次数: 0

The role of clay layers in managing fluid pressure propagation during managed aquifer recharge 黏土层在管理含水层补给过程中控制流体压力传播的作用

IF 4.9

Groundwater for Sustainable Development Pub Date : 2025-11-01 Epub Date: 2025-10-09 DOI: 10.1016/j.gsd.2025.101529

John B. Ogunleye, Ethan W. Conley, Mahesh P. Parija, Ryan M. Pollyea

{"title":"The role of clay layers in managing fluid pressure propagation during managed aquifer recharge","authors":"John B. Ogunleye, Ethan W. Conley, Mahesh P. Parija, Ryan M. Pollyea","doi":"10.1016/j.gsd.2025.101529","DOIUrl":"10.1016/j.gsd.2025.101529","url":null,"abstract":"<div><div>Groundwater abstraction in the Potomac aquifer of the Virginia Coastal Plain has caused significant groundwater depletion, saltwater intrusion, and land subsidence. Managed Aquifer Recharge (MAR) is being explored as a mitigation strategy. However, the Potomac Aquifer position above crystalline basement rock raises concerns about induced seismicity due to fluid pressure changes. Existing numerical models often assume homogeneous aquifer properties, overlooking fine heterogeneities. Recent deep drilling efforts for MAR in the Virginia Potomac aquifer reveal 20 m-thick clay interbeds, yet their role in fluid pressure dynamics during high-rate injection remains poorly understood. This study develops a 3D numerical model incorporating aquifer heterogeneity, such as discontinuous clay layers (DCLs), to buffer fluid pressure propagation into deep basement rocks. Results indicate that focusing injection above the clay layer separating the middle and lower Potomac aquifer reduces fluid pressure reaching the basement when lateral DCL dimensions exceed 800 × 400 m. This study also shows that injecting into the upper and middle Potomac aquifer increases fluid pressure within the overlying Potomac confining unit, potentially mitigating land subsidence and reducing pressure propagation toward the basement, which decreases the risk of inducing seismicity.</div></div>","PeriodicalId":37879,"journal":{"name":"Groundwater for Sustainable Development","volume":"31 ","pages":"Article 101529"},"PeriodicalIF":4.9,"publicationDate":"2025-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145319492","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}

引用次数: 0

Development of a multi-model framework for standardized groundwater index computation: Application to Andhra Pradesh and Telangana states 标准化地下水指数计算的多模型框架的开发：在安得拉邦和特伦甘纳邦的应用

IF 4.9

Groundwater for Sustainable Development Pub Date : 2025-11-01 Epub Date: 2025-10-08 DOI: 10.1016/j.gsd.2025.101523

Asha Farsana M, Bharath Kumar Reddy Kadapala, Satya Geetha Vimala Channa, Abdul Hakeem K, Chandrasekar K

{"title":"Development of a multi-model framework for standardized groundwater index computation: Application to Andhra Pradesh and Telangana states","authors":"Asha Farsana M, Bharath Kumar Reddy Kadapala, Satya Geetha Vimala Channa, Abdul Hakeem K, Chandrasekar K","doi":"10.1016/j.gsd.2025.101523","DOIUrl":"10.1016/j.gsd.2025.101523","url":null,"abstract":"<div><div>Groundwater drought occurs when there is a depletion of groundwater storage and it is marked by unavailability of groundwater supply to meet the irrigation, public, industrial and other demands. Monitoring groundwater levels and groundwater discharge and quantifying them helps predict and mitigate groundwater drought. This study presents an improved and more accurate methodology for the computation of the Standardized Groundwater Index (SGWI) for monitoring groundwater drought. The traditional approaches of calculating standardized indices involve fitting appropriate statistical distributions to the time series data of each observation well. These techniques generally require long-term, well-level data, which may only be available in some cases. This study utilizes monthly groundwater level time-series data from a set of observation wells in Andhra Pradesh and Telangana states, spanning from January 2008 to August 2023, to estimate the Standardized Groundwater Index (SGWI). The study overcomes the limitation of a short data period (16 years) by employing a novel multi-model approach. The Kolmogorov-Smirnov test and Akaike Information Criterion corrected (AICc) were used to identify optimal fit distributions, followed by calculating weighted probabilities of non-exceedance based on model likelihoods. These probabilities were interpolated and transformed into unit normal standard deviates to create the SGWI map for the study area. The SGWI demonstrated a good correlation (R<sup>2</sup> > 0.74) with other standardized indices, such as the GRACE-Drought Severity Index and the Standardized Runoff Index. The high correlation with long-term runoff-based indices emphasizes the effectiveness of using a multi-model approach in generating standardized indices in data-scarce environments.</div></div>","PeriodicalId":37879,"journal":{"name":"Groundwater for Sustainable Development","volume":"31 ","pages":"Article 101523"},"PeriodicalIF":4.9,"publicationDate":"2025-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145319490","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}

引用次数: 0

Treatment of fluoride-contaminated water using hydrous Mn and Zr oxide doped hybrid anion exchange resin (HAIX/Mn-Zr) 含水Mn、Zr氧化物掺杂杂化阴离子交换树脂（HAIX/Mn-Zr）处理含氟污水

IF 4.9

Groundwater for Sustainable Development Pub Date : 2025-11-01 Epub Date: 2025-10-13 DOI: 10.1016/j.gsd.2025.101534

Jay Sharma, Vikrant Ranyal, Sudipta Sarkar

{"title":"Treatment of fluoride-contaminated water using hydrous Mn and Zr oxide doped hybrid anion exchange resin (HAIX/Mn-Zr)","authors":"Jay Sharma, Vikrant Ranyal, Sudipta Sarkar","doi":"10.1016/j.gsd.2025.101534","DOIUrl":"10.1016/j.gsd.2025.101534","url":null,"abstract":"<div><div>Fluoride contamination of groundwater is a persistent problem in the Indian Peninsula and also in many parts of the world. Zirconium oxide-impregnated polymers have demonstrated promising fluoride removal capacity; however, their restricted operating range of pH and interference from co-existing anions invariably limit the feasibility of field application. To obviate the problem, a strong-base polymeric anion exchanger (INDION 830S) was modified with the impregnation of dual metal (Zr and Mn) hydroxide nanoparticles. The synthesized resin (HAIX/Mn-Zr) demonstrated preferential fluoride capture in the presence of competing anions in the pH range of 4.5–5, with the point of zero charge measured at pH around 5.1 and a good removal efficiency of 80.7 % up to pH 6.0. Adsorption of fluoride by HAIX/Mn-Zr followed the Freundlich isotherm model and the pseudo-second-order kinetics. The maximum fluoride adsorption capacity was 28.1, 29.7, and 31.5 mg/g at 20, 30, and 40 °C temperatures, respectively. The adsorption process was endothermic, exhibiting an activation energy of 12.61 kJ/mol, a negative Gibbs free energy, and a positive enthalpy change. Fourier-transform infrared (FT-IR) and X-ray photoelectron spectroscopy (XPS) analysis indicated chemisorption of fluoride onto HAIX/Mn-Zr, while X-ray diffraction (XRD) confirmed its amorphous structure. Scanning electron microscopy with energy-dispersive X-ray spectroscopy (SEM/EDS) revealed a visible morphology change after the loading of Mn (2.2 wt%) and Zr (21.8 wt%). The column study demonstrated that around 2000 bed volumes of contaminated water were treated before the breakthrough of 1.5 mg/L of fluoride. Overall, the HAIX/Mn-Zr is a low-cost sorbent with a facile synthesis and regeneration procedure, reusability up to five cycles, and high fluoride removal efficiency, indicating its high potential for the defluoridation of contaminated groundwater.</div></div>","PeriodicalId":37879,"journal":{"name":"Groundwater for Sustainable Development","volume":"31 ","pages":"Article 101534"},"PeriodicalIF":4.9,"publicationDate":"2025-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145319489","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}

引用次数: 0

A triple-benefit approach: Simultaneous removal of nitrate and emerging contaminants from groundwater using an integrated electrocoagulation-adsorption system and in-situ PAC separation 一种三重效益的方法：使用集成的电混凝-吸附系统和原位PAC分离同时去除地下水中的硝酸盐和新污染物

IF 4.9

Groundwater for Sustainable Development Pub Date : 2025-11-01 Epub Date: 2025-10-13 DOI: 10.1016/j.gsd.2025.101532

Fatemeh Ahmadi , Ehsan Ranjbar , Majid Baghdadi , Shima Mardani , Behnoush Aminzadeh Goharrizi

{"title":"A triple-benefit approach: Simultaneous removal of nitrate and emerging contaminants from groundwater using an integrated electrocoagulation-adsorption system and in-situ PAC separation","authors":"Fatemeh Ahmadi , Ehsan Ranjbar , Majid Baghdadi , Shima Mardani , Behnoush Aminzadeh Goharrizi","doi":"10.1016/j.gsd.2025.101532","DOIUrl":"10.1016/j.gsd.2025.101532","url":null,"abstract":"<div><div>The simultaneous presence of organic and inorganic contaminants in the environment is a global concern. These contaminants penetrate the soil and gradually leach into groundwater, posing substantial environmental and human health hazards. This study evaluates the efficiency of a combined electrocoagulation-adsorption system for the simultaneous removal of nitrate (NO<sub>3</sub><sup>−</sup>) and contaminants of emerging concern (CECs). The study examined how operational parameters including electrode materials, current, adsorbent dosage and reaction time affect the simultaneous removal of NO<sub>3</sub><sup>−</sup> and bisphenol A (as a model CEC) from groundwater. The optimal conditions were obtained with an Al anode and Cu foam cathode, current of 0.3 A, reaction time of 60 min, and powdered activated carbon (PAC) dosage of 120 mg/L. Under these conditions, NO<sub>3</sub><sup>−</sup> and bisphenol A removal reached 94% and 89%, respectively. Mechanistically, electrocoagulation facilitated both contaminant removal and independent precipitation of PAC, therefore there is no need for additional steps to separate it from the reactor. These findings highlight the potential of the proposed integrated system as a cost-effective and practical solution for the treatment of contaminated groundwater.</div></div>","PeriodicalId":37879,"journal":{"name":"Groundwater for Sustainable Development","volume":"31 ","pages":"Article 101532"},"PeriodicalIF":4.9,"publicationDate":"2025-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145320292","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}

引用次数: 0

Lithium ions removal from groundwater using waste-derived date pits modified with manganese oxide and cellulose nanocrystals 利用锰氧化物和纤维素纳米晶改性的废枣核去除地下水中的锂离子

IF 4.9

Groundwater for Sustainable Development Pub Date : 2025-11-01 Epub Date: 2025-11-06 DOI: 10.1016/j.gsd.2025.101544

Hadeel A. Al-Karablieh , Amina BiBi , Nabil Zouari , Basem Shomar , Mohammad A. Al-Ghouti

{"title":"Lithium ions removal from groundwater using waste-derived date pits modified with manganese oxide and cellulose nanocrystals","authors":"Hadeel A. Al-Karablieh , Amina BiBi , Nabil Zouari , Basem Shomar , Mohammad A. Al-Ghouti","doi":"10.1016/j.gsd.2025.101544","DOIUrl":"10.1016/j.gsd.2025.101544","url":null,"abstract":"<div><div>Lithium (Li<sup>+</sup>) has been detected in water sources as a result of growing industrial activities, posing potential risks to both environmental and human health. To address this concern, the current investigation aimed to assess the feasibility of removing lithium ions from groundwater through adsorption using a novel waste-based adsorbent derived from date pits. The modification of date pits involved incorporating manganese oxide/cellulose nanocrystal (CNC) composites (MnO<sub>2</sub>/CNC@DP). Various parameters of the adsorption study were assessed, including pH, temperature, and the initial concentration of Li<sup>+</sup>, using both synthetic solutions and real groundwater samples. The adsorbent's physicochemical properties were characterized using a range of analytical techniques. The adsorption studies revealed that at pH 2, the Li<sup>+</sup> removal efficiency reached 25.18 % and the adsorption capacity improved with higher initial Li<sup>+</sup> concentrations, reaching 15.5 mg/g. Thermodynamic analysis indicated that the adsorption process was spontaneous and endothermic, with the Langmuir model providing the best fit to the experimental data. An efficiency of 88.42 % was achieved for the removal of Li<sup>+</sup> from real groundwater samples. Desorption experiments further indicated that Li<sup>+</sup> could be effectively desorbed using 1.0 M HCl. The proposed mechanisms governing Li<sup>+</sup> adsorption by (MnO<sub>2</sub>/CNC@DP) included chemisorption, pore filling, intra-particle diffusion, and electrostatic attraction. In conclusion, this study demonstrates that MnO<sub>2</sub>/CNC@DP is a promising and cost-effective adsorbent for removing Li<sup>+</sup> from contaminated groundwater.</div></div>","PeriodicalId":37879,"journal":{"name":"Groundwater for Sustainable Development","volume":"31 ","pages":"Article 101544"},"PeriodicalIF":4.9,"publicationDate":"2025-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145519838","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}

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