The data herein presented concerns the article entitled “Evaluation of hydrochemical properties and groundwater suitability for irrigation uses in southwestern zones of Jashore, Bangladesh”. Data was collected during 2018-2019 in the southwestern zones of Jashore, Bangladesh. One hundred groundwater samples (boreholes and tube wells) were collected to evaluate groundwater quality, using the irrigation water quality index (IWQI) as an indicator. Fourteen hydrochemical parameters (pH, EC, TDS, NO
3
N, pH, EC, Ca
2+
, Mg
2+
, Na
+
, K
+
, Cl
−,
HCO
3
−
, SO
4
2−
and Fe
2+
) were used to calculate irrigation water quality indices (KI, Na%, PI, SAR, SSP, MH, and TH). Statistical methods such as Viper diagrams, USSL, and Wilcox diagrams were used to visualize datasets. The attained data can be used to assess the hydrogeochemistry of the sampled sites and groundwater quality for irrigation purposes. The findings of this work can be used in the optimization of management and treatment procedures and in the implementation of sustainable water development.
The hydrogeological investigation of south-eastern coastal aquifer of Bangladesh has been performed for the evaluation of well performance in the aquifer based on well logs and step-drawdown tests. The consequences from four single-well of stepdrawdown tests have conductd in two recent boreholes through Jacob and Rorabaugh's methods. From lithological data analysis it is observed that the aquifer of studied area is in Early Miocene age which consists of Upper and Middle Boka Bil formation. The values of step-drawdown test results have indicated well losses ranges between 17% and 19.8% and loss of aquifer on two well ranges between 82.6 % and 80.2% which reflected higher efficiencies of two wells. The values of specific capacity have varied from two wells in totally 18.13 m3/day/m to 23.79 m3/day/m, respectively whereas the values of well efficiency varied from 95.3% to 98.5% which indicate that the wells are properly developed and designed. The estimation of aquifer transmissivity ranges from 271.24 (m2/day) to 263.3 (m2/day) and these values have evaluated the wells indicating the higher production with its water accessibility from the wells. Therefore, it is indicated the laminar flow of the aquifer/well-face (negligible part of turbulent flow). As a result, the water-bearing zone is effective for high amount of water production per day. The total approaches of litholog and pumping tests determine the effective application of the single-well on step-drawdown tests and it has identified the safe and sustainable well growth for the extraction of groundwater in future.
With the continual modernization, researchers and scientists are very conscious about the environmental issues. The E-waste which is relatively recent addition to the waste stream in the form of discarded electronic and electric equipment is getting increasing attention from policy makers as the quantity being generated rising rapidly. The consumption of e-waste has been exponential in the last two decades. The developing countries are facing huge challenges in the management of e-waste which are either internally generated or imported illegally as used goods in an attempt to bridge the so-called "digital divide". E-waste contains hazardous constituents that may negatively impact the environmental and affect human health if not properly managed. On the other hand, e-waste contains up to 60 metals including platinum, gold, silver, copper, aluminium, palladium, iron and other valuable metals. Considering these two facts along with the resource management strategy has been committed to extract precious metals from Printed Circuit Board (PCB) of e-waste. In this study, Printed Circuit Board (PCB) are collected from the motherboards of waste computers and performing several reactions in a chemical lab. Al 2 (SO) 4 has been prepared by using sulfuric acid and potassium hydro-oxide and CuSO 4 prepared by using nitric acid and sulfuric acid. In this preparation process the top most priority is placed on the environment friendly issues. This study will very helpful in the proper management of ewaste and reservation of our resources which are limited. 2 circuit, cathode ray tubes. In the same contrary, the components represent the valuable part of circuit which fabricates different metallic bodies containing copper and gold, zinc and others [16].Actually, in last decades, the quantity of CRT monitors as the form of television as well as computers is considered as the replacement Liquid Crystal Displays (LCD) The prediction goes that around 8.5 thousand tons televisions as well as computer monitors are redundant in the south Asia every year. These same circumstances are found in other industrial, developed with developing state in the world. So, this ratio indicated that re cycle must be needed [17]. As a result, during the last decades, numerous explorations have been planned or aimed at the innovation of reasonable techniques withdrawal for precious metallic substances. This process is continuing from the last several decades. Basically, these processes are divided in different ways such as physical, hydrometallurgical, bio metallurgical, and hydrometallurgical as well as electrochemical procedures. Here used the electrochemical techniques which are considered the most competent because lower discharge of poisonous gases with lower volatile metals, lower energy of expenditure, and small waste production with its easier operational circumstances.
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