Frequency: Quarterly E- ISSN: Awaited P- ISSN: 2249-1368 Abstracted/ Indexed in: Ulrich's International Periodical Directory, Google Scholar, SCIRUS, Genamics JournalSeek, EBSCO Information Services
Quarterly published in print and online "Inventi Impact: Water & Environment" publishes high quality unpublished as well as high impact pre-published research and reviews catering to the needs of researchers and professionals. This multidisciplinary journal deals with all the aspects related to water and environmental management with special emphasis on water cycle and environmental conservation. Subject areas included are land use and groundwater use; water conservation and integrated water management; flood alleviation, flood estimation and floodplain modelling; sewage sludge digestion and urban sewerage; pollutant build-up and run-off; cryptosporidium risk assessment; bacteriological and chemical quality of drinking water; risk assessment for landfills; river restoration and ecohydrology, etc.
Accurate and reliable groundwater level forecasting\nmodels can help ensure the sustainable use of a\nwatershedââ?¬â?¢s aquifers for urban and rural water supply. In\nthis paper, three time series analysis methods, Holtââ?¬â??Winters\n(HW), integrated time series (ITS), and seasonal autoregressive\nintegrated moving average (SARIMA), are\nexplored to simulate the groundwater level in a coastal\naquifer, China. The monthly groundwater table depth data\ncollected in a long time series from 2000 to 2011 are\nsimulated and compared with those three time series\nmodels. The error criteria are estimated using coefficient of\ndetermination (R2), Nashââ?¬â??Sutcliffe model efficiency coefficient\n(E), and root-mean-squared error. The results indicate\nthat three models are all accurate in reproducing the\nhistorical time series of groundwater levels. The comparisons\nof three models show that HW model is more accurate\nin predicting the groundwater levels than SARIMA\nand ITS models. It is recommended that additional studies\nexplore this proposed method, which can be used in turn to\nfacilitate the development and implementation of more\neffective and sustainable groundwater management\nstrategies....
Microplastics as micropollutants are widely spread in aquatic areas that can have a toxic effect on aquatic life. To reduce the potential risk they pose, it is essential to detect the microplastics and the source of the contamination of the environment. Here, we designed and developed a droplet-based microfluidic impedance flow cytometer for in situ detection of microplastics in water. Impedance spectroscopy enables the direct measurement of the electrical features of microplastics as they move in water, allowing for sizing and identification of concentration. To show the feasibility of the developed method, pure and functionalized polystyrene beads ranging from 500 nm to 6 μm in four size groups and different concentrations were used. Focusing on three different frequencies (4.4 MHz, 11 MHz, and 22.5 MHz), the changes in the signal phase at frequencies of 4.4 MHz and 11 MHz are a strong indicator of microplastic presence. In addition, the functionalized microplastics showed different magnitudes of the measured signal phase than the pure ones. A k-nearest neighbors classification model demonstrated our developed system’s impressive 97.4% sensitivity in accurately identifying microplastics based on concentration. The equivalent circuit model revealed that the double-layer capacity of water droplets is significantly impacted by the presence of the microplastics. Our findings show the potential of droplet-based microfluidic impedance flow cytometry as a practical method for detecting microplastics in water....
Ground-water is an essential and vital component of our life support system. The ground water quality of Kodaikanal\r\ntaluk, Tamil Nadu for the period of pre monsoon season in the year of 2012 has been studied to evaluate the suitability of\r\nground water for domestic uses. Totally 17 Groundwater samples were collected from open well and bore well and analyzed for\r\nvarious physical (pH, EC, TDS) and chemical parameters (Na, K, Ca, Mg, HCO3, CO3, SO4 and Cl). It is observed that the quality of\r\ngroundwater is suitable for domestic use in most of the location with respect to World Health Organization (WHO 1984) and\r\nsome of the samples are not suitable for drinking purposes. To understand the water quality, Arc GIS software was used to\r\nprepare a spatial distribution map and identify the suitable and unsuitable zones. Finally, overlay the all spatial maps and find\r\nout the unsuitable zones for drinking purposes....
Levafix yellow CA (LY) is a reactive azo dye widely used in textile industries and its removal from wastewater is difficult due to complex structural properties. This paper deals with a hybrid electrochemical degradation-chemical adsorption approach for the removal of LY from aqueous solution. The dye solution containing sodium chloride (NaCl) electrolyte was first electrolyzed using graphite electrodes, followed by adsorption onto magnesium oxide (MgO) or zinc oxide (ZnO) nanoparticles. MgO was found to be a better adsorbent than ZnO. The progress of dye removal was monitored by CV, UV-VIS spectrophotometry, total organic carbon (TOC) measurements and also by Mass spectral analysis. Almost 100% decolourization was achieved by electrolysis while about 90.3 % TOC removal was achieved through adsorption with MgO nanoparticles....
In this paper, a linear programming model has been developed for determining the optimal water usage for residential purposes. A case of Shri Mata Vaishno Devi University (SMVDU) has been discussed. The model presented in this paper is very simple and easy to use. The water usage in residential area consisting of faculty quarters and students’ hostels has been studied. The necessary data have been supplied to the model and the minimum water requirements have been computed for different faculty quarters as well as hostels. The model has been solved using TORA software. This study is very useful in deciding the optimal water requirements/distribution in the different units of the university....
In order to scientifically guide the water-preserved mining of the coal seam floor and make up for the shortcomings in the conventional evaluation of water blocking performance of the coal seam floor, according to the system resilience theory, the difference between the vulnerability and resilience of the coal seam floor is analyzed, and three elements and nine indicators for evaluating water resistance toughness of the coal seam floor are determined. In the evaluation process, first of all, the maximum difference normalization method is used to conduct a dimensionless analysis of quantifiable indicators to determine the importance of the corresponding indicators, and the AHP software yaahp10.1 is used to determine the weight vector of each indicator. Secondly, the single-factor membership degree is determined according to the single-factor resilience grade classification criterion and membership function and finally combined with the weight vector for fuzzy synthesis calculation and comprehensive evaluation. The model is applied to a specific project. Research has shown that in the water hazard threat area of No. 10 coal seam floor in Jiegou Coal Mine, Anhui Province, the performance of system vulnerability elements is weak, the performance of system recoverability elements is better, and the performance of system adaptability elements is extremely poor. From the perspective of the whole life cycle, determining the treatment target area, optimizing the rock formation modification and repairing materials, and enhancing the water resources carrying capacity can improve the water resistance toughness of the coal seam floor. Related conclusions verify the effectiveness of the evaluation model. Furthermore, an optimized strategy for coal seam floor water retention mining is proposed: the technology system of water-preserved mining for coal seam floor contains 3 stages and 3 detections, which provides a scientific basis for the in situ protection of highpressure limestone water from coal seam floor....
Strengthening the transmission uniformity of remedial amendments in heterogeneous porous media is important for improving in situ groundwater remediation efficiency. This study developed a characterization method to represent the improvement of transmission uniformity in heterogeneous media using the degree of difference in hydraulic conductivity of porous media between xanthan solution and pure water, which was defined as the transmission uniformity control coefficient U. Research results showed thatU of medium sand/fine sand (2.44) was the most ideal among the three medium combinations tested when the concentration of xanthan solution was 100 mg/L. Then, factors that may influence U were analyzed, and the obtained results showed that xanthan’s control ability is affected by permeability contrast (media combinations) and polymer concentration. Generally, when concentrations were in the range of 100~800 mg/L, Umf > Ucf > Ucm. Finally, the actual degree of polymer propulsion under different concentrations and media combinations was analyzed, and the obtained results showed that as different media were varied in permeability change degree, while the migration speed presented an overall decrease as the concentration increased, where the maximum migration front in the low-permeability zone (LPZ) was more obvious than that in the high permeability zone (HPZ). This was consistent with the results characterized by U....
The emergence of antibiotic resistance (AR) poses a signicant threat to both public health and aquatic ecosystems. Wastewater treatment plants (WWTPs) have been identied as potential hotspots for disseminating AR in the environment. However, only a limited number of studies have been conducted on AR dissemination through WWTPs in Sri Lanka. To address this knowledge gap in AR dissemination through WWTP operations in Sri Lanka, we critically examined the global situation of WWTPs as hotspots for transmiing antibiotic-resistant bacteria (ARB) and antibiotic-resistant genes (ARGs) by evaluating more than a hundred peer-reviewed international publications and available national publications. Our ndings discuss the current state of operating WWTPs in the country and highlight the research needed in controlling AR dissemination. The results revealed that the impact of dierent wastewater types, such as clinical, veterinary, domestic, and industrial, on the dissemination of AR has not been extensively studied in Sri Lanka; furthermore, the eectiveness of various wastewater treatment techniques in removing ARGs requires further investigation to improve the technologies. Furthermore, existing studies have not explored deeply enough the potential public health and ecological risks posed by AR dissemination through WWTPs....
Some physicochemical parameters related to groundwater quality obtained from Thittakudi taluk, Cuddalore district of Tamilnadu was investigated for the purpose of drinking. Total 40 groundwater samples are collected from tube wells during the month of February 2014. In the groundwater samples analysed in physic properties and chemical characters such as pH, EC, TDS, major cations and major anions were measured using standard procedure. The physical properties values are varied from pH (6.9 to 8.1), EC (610 μmho/cm to 3984.38 μmho/cm) and TDS (502 to 2550). Similarly major ions Ca (48 to 119), Mg (31.6 to 114), Na (3.7 to 75.7), K (1 to 66.1), HCO3 (162.5 to 420.9), SO4 (0.1 to 11.5), Cl (130.43 to 487.44) and NO3 (5 to 25.1) all parameters except pH and EC indicate the unite of Mg/l. all the measured parameters compared with WHO (2014) standard for drinking water quality permissible limit. In this case the study area samples are occurred some samples above and below the limit, which is the affect the some anthropogenic activities....
The water pollution source localization is of great significance to water environment protection. In this paper, a study on water\npollution source localization is presented. Firstly, the source detection is discussed. Then, the coarse localization methods and\nthe localization methods based on diffusion models are introduced and analyzed, respectively. In addition, the localization method\nbased on the contour is proposed.The detection and localization methods are compared in experiments finally.The results show that\nthe detection method using hypotheses testing is more stable. The performance of the coarse localization algorithm depends on the\nnodes density.The localization based on the diffusion model can yield precise localization results; however, the results are not stable.\nThe localization method based on the contour is better than the other two localization methods when the concentration contours\nare axisymmetric.Thus, in the water pollution source localization, the detection using hypotheses testing is more preferable in the\nsource detection step. If concentration contours are axisymmetric, the localization method based on the contour is the first option.\nAnd, in case the nodes are dense and there is no explicit diffusion model, the coarse localization algorithm can be used, or else the\nlocalization based on diffusion models is a good choice....
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