Characterization of Yamuna River water quality and its remediation by Phytoremediation technique

South African Journal of Chemical Engineering, Год журнала: 2025, Номер unknown

Опубликована: Апрель 1, 2025

Язык: Английский

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Identification of water pollution sources in the Daluxi River using kernel principal component analysis and gradient boosting decision tree

Environmental Earth Sciences, Год журнала: 2025, Номер 84(9)

Опубликована: Апрель 22, 2025

Язык: Английский

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A multi-objective optimization model integrating machine learning and time-frequency analysis for supporting nitrogen and phosphorus pollution reduction in Guangzhou city, China

Journal of Environmental Management, Год журнала: 2025, Номер 385, С. 125612 - 125612

Опубликована: Май 5, 2025

Язык: Английский

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Physicochemical and geochemical analysis of groundwater quality in Ilaporu, Ogun State, Nigeria, for domestic and agricultural usage

HydroResearch, Год журнала: 2024, Номер 7, С. 225 - 247

Опубликована: Янв. 1, 2024

The inhabitant of Ilaporu settlements solely depends on groundwater for domestic and agricultural purpose as a result scarcity contamination surface water. present study therefore aimed at investigating the physicochemical geochemical composition suitability. Hand-dug well waters were picked randomly from thirty (30) major with aid Global Position Satellite (GPS). physical parameters such Hydrogen ion concentration (pH), Electrical conductivity (EC),) Total Dissolved Solid (TDS) measured in-situ while chemical compositions cations (Ca2+, K+, Mg2+ Na+) anions (Cl−,F−,SO42−,NO3−and CO32−) obtained through laboratory procedure. water was subjected to an analytical measurement utilizing Atomic Absorption Spectrometer (AAS) examine seven heavy metals (Cd, Pb, Ni, Fe, Mn, Co, Zn). This conducted various pollution indicators, including degree (DoC), modified (mDoC), enrichment factor (ER), accumulation index (Igeo), loading (PLI), ecological risk potential (ERIP), health risks related carcinogenic non-carcinogenic substances. Water quality indexes permeability (PI), sodium adsorption ratio (SAR), soluble percentage (SSP), (%Na), residual carbonate bicarbonate (RSC RSBC), Kelly's (KR), magnetic (MR) also used evaluate suitability irrigation. revealed that has no trace lead (Pb) other are within acceptable limit WHO NSDWQ, except cadmium. (WQI) range between 1.11 23.76%. implies falls in excellent categories index, thereby making it suitable both PLI, DoC mDoC contamination/pollution PLI <1, <7 <1.5 all analysed samples. little or contamination. assessment showed samples area susceptible Cd Ni increase cancer (carcinogenic). irrigation 100%, 93.7%, 60%, 83.3%, 86.7% 90%, PI, SAR, %Na, MR, RSC, RSBC, KR SSP, respectively. It is recommended should be carried out least once every three years order minimize any hazards, contamination, appropriateness

Язык: Английский

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Numerical model study on stability of a micro-tidal inlet at Muttukadu along the east coast of Bay of Bengal

Environmental Research, Год журнала: 2024, Номер 248, С. 118304 - 118304

Опубликована: Янв. 30, 2024

Язык: Английский

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Removal of Zinc from Wastewaters Using Turkish Bentonite and Artificial neural network [ANN] modeling

Heliyon, Год журнала: 2024, Номер 10(20), С. e39080 - e39080

Опубликована: Окт. 1, 2024

Highlights•The adsorption of zinc was achieved with 97.5% efficiency using Ordu-Unye bentonite.•Temkin model showed the highest fit for process.•The process is thermodynamically spontaneous and endothermic.•The ANN method used in modeling prediction zinc.ABSTRACTIn this study, bentonite as an adsorbent removal from aqueous solutions. The aim experimental part study to ascertain how affected by variables such pH, amount, contact time, initial concentration. In second experiments, modified two different acids performance also investigated. Characterization raw bentonites carried out FTIR XRD. It observed that acid modification negatively higher (95%) obtained compared (58.4% HNO3 activated, 43.8% H2SO4 activated). Equilibrium isotherms were modelled explain mechanism. Adsorption isotherm studies fits well Langmuir (R2: 0.99) Temkin 0.97) models. Besides these investigations, various artificial neural network (ANN) training techniques optimize process. By trial error, optimal changing number hidden neurons each layer architecture. These models under analyzed determine their R2 mean square error (MSE) values, outcomes identified. Among ANN, it determined Bayesian Regularization exhibited optimum architecture (R2:0.995) lowest MSE (MSE:0.0008) ratio.Graphical abstract

Язык: Английский

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Coupling Monte Carlo simulation with CRITIC-enhanced water quality assessment for the Weishui Reservoir

Water Science & Technology Water Supply, Год журнала: 2024, Номер 24(2), С. 601 - 614

Опубликована: Янв. 16, 2024

Abstract Traditional methods for water quality assessment often overlook the uncertainty of data during sample collection process, leading to limitations in their application. Therefore, this study combines comprehensive index (CWQI) method and improved CWQI based on CRITIC with Monte Carlo evaluate Weishui Reservoir watershed. The results indicate that (1) there is a noticeable difference between Shaxiping Dayanzui sampling points. at point excellent, classification Class I. In contrast, comparatively poorer, an average III. (2) Sensitivity analysis shows TN, NH4+-N, TP are more sensitive than other indicators, suggesting they primary factors influencing evaluation results. (3) Compared traditional method, combining CRITIC-based scientifically rigorous. It considers variety allocates weights rationally, provides align better seasonal variations, resulting higher discriminative power.

Язык: Английский

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Spatial Distribution of Pollutants and Risk Assessment of Heavy Metals in Farmland Groundwater around a Traditional Industrial Park—A Case Study of Shifang City, Southwestern China

Sustainability, Год журнала: 2023, Номер 15(20), С. 14903 - 14903

Опубликована: Окт. 16, 2023

In this paper, the groundwater environment in farmland area around a traditional industrial park Shifang City, southwest China, was taken as research object. Geostatistical methods with GIS technology were adopted to analyze spatial distribution of conventional pollutants and heavy metals evaluate potential ecological risks. Chemical oxygen demand (CODMn) ammonia nitrogen (NH3-N) distributions showed poor continuity apparent differentiation, which primarily attributed intensive anthropogenic activities (e.g., discharges). The total relative hardness (TH), SO42−, Cl− uniformly affected by external factors, little differentiation. Concentrations phosphorus (TP), TH, followed an approximately normal distribution; peak values detected concentrations appeared frequency range, while CODMn NH3-N did not. Groundwater enrichment for various metals, mainly Zn Cu, differentiation Cr consistent interference. correlation coefficients Cr–Cu Cu–Pb 0.693 0.629 (p < 0.01), respectively, indicating similar pollution sources. single-factor index Ni > Pb Mn Cu Cr. had moderate risk. six metals’ average integrated risk (RI) revealed that mild accounted 96.2% investigation area. Overall, poses shallow surrounding farmland.

Язык: Английский

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Assessment of lead heavy metal pollution in Ciliwung River

IOP Conference Series Earth and Environmental Science, Год журнала: 2023, Номер 1263(1), С. 012033 - 012033

Опубликована: Ноя. 1, 2023

Abstract Heavy metal contributed in bio-magnification process. So, its presence needs to be monitored and evaluated prevent control hazards human health sustainability river ecosystem. One of that heavy is lead. This study aims assessment the lead pollution Ciliwung River because one uses as water resources for Regional Drinking Water Company (PDAM). used a survey analytical method. There were 12 samples column 10 sediments distributed from upstream beginning downstream. The parameters determined site checker included temperature, pH, Electrical Conductivity (EC), Total Dissolved Solids (TDS), Oxygen (DO), Oxidation Reduction Potential (ORP). While contained sample Automatic Absorption Spectrophotometric (AAS). result showed content all exceeded quality standards on sediment more than column. Lead mostly due anthropogenic sources it occurred naturally small amounts. Downstream, EC, TDS, ORP values increase, while pH DO value decreases. at sampling points positive. It means deoxygenation along River. implication needed additional raw processing accompanied further economic analysis make sure availability community sustained.

Язык: Английский

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Assessing the impact of China’s river chief system on enterprise pollution discharge

Frontiers in Public Health, Год журнала: 2023, Номер 11

Опубликована: Дек. 15, 2023

The River Chief System (RCS), a pivotal environmental governance policy promoted by the Chinese government, has far-reaching implications for public health. This study aims to comprehensively assess impact of RCS on corporate pollution emissions, emphasizing its role in improving quality and safeguarding Utilizing database industrial enterprises data from heavily polluting spanning 2003 2013. Manual collation implementation across prefecture-level cities during same period. Application DID method verify extent emissions. significantly reduces emissions enterprises. Heterogeneity analysis reveals be more effective addressing visible pollutants rivers, non-provincial capitals, industries, resulting notable reduction Mechanism testing underscores importance increasing government attention protection strengthening regulation as key factors contributing RCS’s success reducing Additionally, finds that business environment enterprises, measured through marketization index, enhances effectiveness river introduces new perspective examining abatement effects RCS, gap micro-level research. findings not only contribute understanding but also offer valuable insights governments policymakers promoting further development policies. results this research are significant By effectively controlling contributes positively and, consequently, enhancing health outcomes.

Язык: Английский

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