scholarly journals Adsorption Isotherms of Diuron and Hexazinone in Drinking Water Using Four Agro-Industrial Residues

2020 ◽  
Vol 38 ◽  
Author(s):  
V. TAKESHITA ◽  
K.F. MENDES ◽  
R.F. PIMPINATO ◽  
V.L. TORNISIELO
Keyword(s):  
Drinking Water ◽  
Water Samples ◽  
High Performance ◽  
Experimental Unit ◽  
Human Consumption ◽  
Organic Carbon Content ◽  
Peanut Shell ◽  
Corn Straw ◽  
Industrial Residues ◽  
High Organic Carbon Content

ABSTRACT: Materials with high organic carbon content are studied for the removal of herbicides from water, such as activated carbon. Low cost alternatives should be investigated for the substitution of this type of material in the removal of herbicides from water. In this context, the aim of this research was to evaluate four agro-industrial residues (white grape bagasse, corn straw, peanut shell and soybean hull) as adsorbents of diuron and hexazinone in drinking water. Samples of drinking water were collected from sources used for human consumption. Five concentrations (1, 2, 3, 4 and 5 mg mL-1) of each herbicide were added to the potable water samples. Each experimental unit consisted of 10 mL of a solution of water and herbicide with 0.1 g of each agro-industrial residue. Sorption was evaluated using the batch equilibrium method. High performance liquid chromatography (HPLC) was used to determine the amount of herbicide present in the aqueous solution. The Kf (Freundlich coefficient) of diuron was higher (2.99-11.93 mmol(1-1/n) L1/n kg-1) than hexazinone (2.31-4.61 mmol(1-1/n) L1/n kg-1) for all adsorbents used. Diuron percentage sorption was higher with white grape bagasse (51.15%) and peanut husk (52.44%), and hexazinone with corn straw (22.77%) and white grape marc (21.48%), than other agro-industrial waste for both herbicides. Even though the sorption of diuron was more pronounced than that of hexazinone, the sorption values obtained in this study were less than 52.44% and considered unsatisfactory in terms of effective removal from contaminated water.

scholarly journals Studies on Plankton Diversity of Ashok Sagar Lake in Telangana

2019 ◽  
pp. 353-357
Author(s):  
N. Naga Sameera ◽  
M. Aruna
Keyword(s):  
Drinking Water ◽  
Species Diversity ◽  
Water Samples ◽  
Fish Culture ◽  
Human Consumption ◽  
Diversity Pattern ◽  
Planktonic Algae ◽  
Freshwater Bodies ◽  
Binocular Microscope ◽  
Plankton Diversity

The present study was undertaken to study the diversity of Phytoplankton of freshwater bodies in Nizamabad District and after survey Ashok Sagar lake was selected. The present work was carried out during October, 2013 to September, 2014. Ashok Sagar lake is main source of drinking water for Nizamabad and surrounding villages, It also used for agriculture and support fish culture. All the collected water samples were preserved in 4% formalin and were observed under binocular microscope for identification. Mainly four groups of planktonic algae were recorded in Ashok Sagar lake. They were Chlorophyceae, Cyanophyceae, Euglenophyceae and Bacillariophyceae. The species diversity pattern was more or less uniform throughout the study period in lake, indicating the oligotrophic nature and it is useful for human consumption.

scholarly journals Comparative Analysis of Physico-Chemical Parameters of Borehole, Pond and Well Water in Kashere Metropolis

2017 ◽  
Vol 2 (6) ◽  
pp. 42
Author(s):  
Abdulkadir A. Gidado ◽  
Ibrahim Halliru ◽  
Christiana Anawuese Kendeson ◽  
Yusuf Abdullahi
Keyword(s):  
Drinking Water ◽  
Water Samples ◽  
Standard Procedure ◽  
Human Consumption ◽  
Chemical Parameters ◽  
Quality Of Water ◽  
Major Cations ◽  
Physico Chemical ◽  
High Turbidity

In a bid to ascertain the quality of water for human consumption in Kashere Metropolis, essential physico-chemical parameters were evaluated on samples of drinking water obtained from boreholes, pond and wells located at densely populated areas, labelled as: Kashere cattle market Pond, KP; Kashere cottage Hospital Borehole, HB; Kashere Market Borehole, MB; Federal University, Kashere (FUK) campus Borehole, CB; Kashere cottage Hospital Well, HW; Kashere Market Well, MW and FUK campus Well, CW. Standard procedure for the determination of chemical and physical characteristics of the water samples were used. The results of the investigated parameters in the samples were as follows: ρH 6.61‒7.96, Turbidity 0.0‒2568 FTU, Electrical Conductivity 60.5‒1151 Mhocm-1, Total Dissolved Solids (TDS) 25.9‒518.0 mgL-1, Ca 0.0033‒0.5446 ppm, Mg 0.0793‒1.2215 ppm, Cd 0.0010‒0.0030 ppm, Zn 0.0024‒0.l054 ppm, Pb 0.0002‒0.0026 ppm and Fe 0.0044‒0.5649 ppm. Except for the concentration of Fe (in CB; 0.5649 ppm), all the analyzed minor and major cations in the water samples were in very low concentration and below the permissible limits of WHO standard guidelines values for drinking water.  It is recommended that, water from the pond should be properly treated before consumption due to its high turbidity.  Also periodic assessment of the quality of drinking water from these water sources should be conducted, to ascertain that they are not contaminated by either or both organic and inorganic pollutants.

scholarly journals Profiling of seasonal variation in and cancer risk assessment of benzo (a) pyrene and heavy metals in drinking water from Kirkuk city, Iraq

2021 ◽  
Author(s):  
Awaz Bahrooz Mohammed ◽  
Siraj Muhammed Goran ◽  
Abhrajyoti Tarafdar
Keyword(s):  
Heavy Metals ◽  
Drinking Water ◽  
Water Samples ◽  
High Performance ◽  
Winter Season ◽  
Carcinogenic Risk ◽  
Dry Season ◽  
Cancer Risk Assessment ◽  
Enzyme Linked Immunosorbent Assay ◽  
Adults And Children

Abstract The Lesser Zap River is the main tributary of the Tigris and is used as a main source of drinking water in Kirkuk city through the General Kirkuk project. Water samples at 13 sites were analyzed for heavy metals (cobalt, lead, manganese, copper) and benzo(a)pyrene using 2 methods of analysis (high-performance liquid chromatography (HPLC) and enzyme-linked immunosorbent assay (ELISA) kits). Risk evaluation for benzo(a)pyrene and lead in water samples was accomplished by Monte Carlo simulation. The highest concentrations of B(a)P were recorded at sites S7 and S5, with levels of 0.192 and 0.122 µg L− 1 detected by HPLC and ELISA, respectively. The WHO guidelines for benzo[a]pyrene in drinking water recommend 0.0007 mg L (0.7 µg. L− 1), and none of the samples surpassed this level; moreover, B(a)P levels exceeded EPA standards in 2014 (0.01 ppb), particularly when the liquid-liquid extraction method with HPLC was used. Carcinogenic risks for human adults and children exist and are highest during the rainy season as compared with the carcinogenic risk during the dry season; risks for children exceed those of adults. This indicates that the 2nd round of sampling (winter season) harbors more carcinogenic risk than the 1st round of sampling (dry season).

scholarly journals Physico-Chemical Quality of Drinking Water in the South of Algeria (Case of El-Oued Region) Study of Excess Minerals

2013 ◽  
Vol 16 ◽  
pp. 38-43 ◽  
Author(s):  
Ammar Zobeidi ◽  
Leila Moussaoui
Keyword(s):  
Drinking Water ◽  
Calcium Oxalate ◽  
Water Samples ◽  
Urinary Calculi ◽  
Human Consumption ◽  
Chemical Quality ◽  
Sulfate Ions ◽  
Physicochemical Composition ◽  
Physico Chemical

The Aim of this Study was to Determine the Physicochemical Composition of Water Intended for Human Consumption in Several Regions of El-Oued - Algeria. Excess Minerals in Drinking Water, Including Magnesium, Calcium, Sulfates, Chloride and Fluorides Play a Fundamental Role in the Prevention of Urinary Calculi, which are Formed Mainly from Calcium Oxalate. the Results Revealed that Wholes Water Samples are Analyzed Magnesium ([Mg 2+] > 50 Mg/L). the Rate of Sulfate Ions Average 638 Mg/l, Exceeding the Maximum Allowable Concentration (MAC) Recommended by WHO ([SO42ˉ] > 250 Mg / L). in Addition, 85% had Excess Fluoride [Fˉ] > 0.85 Mg/L, and 100% are Calcium, the Rate of Ca2+ is Greater than 150 Mg/L.

scholarly journals Physico-Chemical Quality Assessment of Various Bottled Commercial Water Brands in Okada Town, Edo State, Nigeria

2021 ◽  
pp. 1-8
Author(s):  
F. W. Ngubi ◽  
I. Eiroboyi
Keyword(s):  
Drinking Water ◽  
Water Samples ◽  
Quality Parameters ◽  
Bottled Water ◽  
World Health ◽  
Total Hardness ◽  
Human Consumption ◽  
Chemical Quality ◽  
Physico Chemical ◽  
Health Organization

In this study, Physico-chemical assessment of some commercial drinking water sold in bottles in Okada Town was evaluated to ascertain their compliance with World Health Organization (WHO) and Nigerian Industrial Standard (NIS): Nigerian Standard for Drinking Water Quality threshold limits using standard analytical methods. Seven different bottled water samples obtained from different manufacturers labelled BWA to BWG were analyzed physically and chemically. Physical examination of the samples showed that they were odourless, colourless, and tasteless. Chemical quality parameters examined were pH, Chloride (Cl-), total hardness (TS), Phosphate (PHO3-), Nitrate (NO3-), Sulphate (SO42-), Iron (Fe), Potassium (K), Sodium (Na), Manganese (Mn), Zinc (Zn), total dissolved solids (TDS), conductivity, turbidity, and total suspended solids (TSS). The pH values of 57.1% of the water samples (BWA, BWB, BWC, BWE & BWF) were within the standards. The remaining chemical quality parameters (Cl-, TS, PHO3-, NO3-, Sulphate SO42-, Iron Fe, K, NA, Mn, Zn, TDS, Conductivity, turbidity, and TSS) of the branded bottled water samples were within the standards for clean and safe drinking. Therefore, they were considered safe and fit for human consumption. 

Preconcentration of phenmedipham and desmedipham by sorption on Separcol SI C18 T for their determination in drinking water by high performance liquid chromatography

1990 ◽  
Vol 55 (9) ◽  
pp. 2146-2151 ◽  
Author(s):  
Věra Tatarkovičová
Keyword(s):  
Drinking Water ◽  
High Performance Liquid Chromatography ◽  
Liquid Chromatography ◽  
Solvent Extraction ◽  
Water Samples ◽  
High Performance ◽  
Solid Sorbent ◽  
Rp Hplc ◽  
Optimized Conditions ◽  
Drinking Water Samples

Solvent extraction used routinely for the preconcentration of carbamate herbicides from drinking water was replaced by sorption on the solid sorbent Separcol SI C18 T. Various factors of the preconcentration step that can affect the results of analysis were examined. Real drinking water samples contaminated by phenmedipham were analyzed by RP-HPLC in optimized conditions.

scholarly journals Organoleptic Analysis of Drinking Water Using an Electronic Tongue Based on Electrochemical Microsensors

Sensors ◽  
2019 ◽  
Vol 19 (6) ◽  
pp. 1435 ◽  
Author(s):  
Manuel Gutiérrez-Capitán ◽  
Marta Brull-Fontserè ◽  
Cecilia Jiménez-Jorquera
Keyword(s):  
Drinking Water ◽  
Water Samples ◽  
Field Effect Transistors ◽  
Electronic Tongue ◽  
Quality Criteria ◽  
Human Consumption ◽  
Chemical Information ◽  
Least Squares Regression ◽  
Conductivity Sensor ◽  
Organoleptic Characteristics

The standards that establish water’s quality criteria for human consumption include organoleptic analysis. These analyses are performed by taste panels that are not available to all water supply companies with the required frequency. In this work, we propose the use of an electronic tongue to perform organoleptic tests in drinking water. The aim is to automate the whole process of these tests, making them more economical, simple, and accessible. The system is composed by an array of electrochemical microsensors and chemometric tools for multivariable processing to extract the useful chemical information. The array of sensors is composed of six Ion-Sensitive Field Effect Transistors (ISFET)-based sensors, one conductivity sensor, one redox potential sensor, and two amperometric electrodes, one gold microelectrode for chlorine detection, and one nanocomposite planar electrode for sensing electrochemical oxygen demand. A previous study addressed to classify water samples according to taste/smell descriptors (sweet, acidic, salty, bitter, medicinal, chlorinous, mouldy, and earthy) was performed. A second study comparing the results of two organoleptic tests (hedonic evaluation and ranking test) with the electronic tongue, using Partial Least Squares regression, was conducted. The results show that the proposed electronic tongue is capable of analyzing water samples according to their organoleptic characteristics, which can be used as an alternative method to the taste panel.

scholarly journals Microbiological Quality of Street Vended Drinking Water in Dhaka City and Screening for Antibiotics Resistance of Isolated Salmonella spp and Pseudomonas spp.

2014 ◽  
Vol 6 (2) ◽  
pp. 359-371
Author(s):  
S. Ahmed ◽  
K. R. Mahbub ◽  
M. M. Ahmed ◽  
M. Rahman ◽  
M. M. Hoque
Keyword(s):  
Drug Resistance ◽  
Drinking Water ◽  
Water Samples ◽  
Biochemical Characterization ◽  
Microbiological Quality ◽  
Antibiotics Resistance ◽  
Human Consumption ◽  
Dhaka City ◽  
Street Vendors

The present study was aimed to assess the microbiological quality of street vended drinking water of Dhaka city. The water samples were collected from street vendors in different areas of Dhaka city. All of the 30 samples were found having microorganisms higher than WHO limits for drinking water. Four (13.34%) samples were confirmed to have Salmonella contamination and twenty (66.67%) samples were contaminated with Pseudomonas. Based on morphological and biochemical characterization Salmonella isolates were identified as Salmonella choleraesuis and Salmonella bongori. Among the isolates of Pseudomonas, fourteen were identified as Pseudomonas alcaligens and six were as Pseudomonas aeruginosa. During antibiogram for Salmonella, 100% of the isolates were found resistant to Penicillin. Chloramphenicol, doxycycline, Gentamycin, Neomycin were sensitive to all of the isolates. The Pseudomonas isolates showed a significant drug resistance to Penicillin (100%), Ampicillin (95%), Amoxicillin (95%) and Nalidixic acid (85%). The present study demonstrates that drinking water samples from street vendors in Dhaka city are not complying with microbiological specifications of WHO and indicates that street vending drinking water in Dhaka city may not be safe for human consumption and also shows that these are the potential sources of drug resistance Salmonella and Pseudomonas.  Keywords: Street vended drinking water; Antibiotic resistance; Salmonella; Pseudomonas. © 2014 JSR Publications. ISSN: 2070-0237 (Print); 2070-0245 (Online). All rights reserved. doi: http://dx.doi.org/10.3329/jsr.v6i2.17640 J. Sci. Res. 6 (2), 359-371 (2014)

Removal of Bisphenol A (BPA) in Surface Water by Ozone Oxidation Process

2015 ◽  
Vol 735 ◽  
pp. 210-214 ◽  
Author(s):  
N.A. Ahmad ◽  
M.A. Yuzir ◽  
E.L. Yong ◽  
Norhayati Abdullah ◽  
Mohd Razman Salim
Keyword(s):  
Drinking Water ◽  
High Performance Liquid Chromatography ◽  
Bisphenol A ◽  
River Water ◽  
Water Samples ◽  
High Performance ◽  
Oxidation Process ◽  
Batch Experiments ◽  
Uv Visible ◽  
The Stability

The removal of Bisphenol A in river water can be accomplished with the application of ozone. Ozone is widely used to disinfect drinking water due to its strong oxidizing properties. This study was conducted to investigate the removal of Bisphenol A in different areas of Skudai River. Batch experiments were conducted at initial Bisphenol A concentration of 0.5 mg L-1. The concentrations of Bisphenol A and dissolved ozone were measured using Ultra High Performance Liquid Chromatography (UHPLC) and UV-Visible spectrophotometer respectively. Based on the results obtained the stability of ozone in the water were very fast. Ozonewas quickly decomposed in water samples. The results indicated that the depletion of ozone varied from different dissolved organic carbon (DOC) value of water samples. Concentration of dissolved ozone was reducing rapidly after spiked into high DOC value (9.17 mg L-1) of river water. The results of the study have shown that ozonation could be used to effectively remove the Bisphenol A from water. The ozone depletions in river water at 120 seconds were about 87%-99%.

scholarly journals Occurrence of Escherichia coli and faecal coliforms in drinking water at source and household point-of-use in Rohingya camps, Bangladesh

Gut Pathogens ◽  
2019 ◽  
Vol 11 (1) ◽  
Author(s):  
Zahid Hayat Mahmud ◽  
Md Shafiqul Islam ◽  
Khan Mohammad Imran ◽  
Syed Adnan Ibna Hakim ◽  
Martin Worth ◽  
...  
Keyword(s):  
Escherichia Coli ◽  
Drinking Water ◽  
Water Samples ◽  
Human Consumption ◽  
Risk Category ◽  
Human Beings ◽  
Faecal Coliforms ◽  
E Coli ◽  
Point Of Use ◽  
Quality Of Water

Abstract Background Safe water is essential for life but unsafe for human consumption if it is contaminated with pathogenic microorganisms. An acceptable quality of water supply (adequate, safe and accessible) must be ensured to all human beings for a healthy life. Methods We collected and analyzed a total of 12,650 drinking water samples, for the presence of Escherichia coli and faecal coliforms, from a large habitation of the displaced Rohingya population comprising of about 1.16 million people living within 4 km2. Results We found that 28% (n = 893) water samples derived from tubewells were contaminated with faecal coliforms and 10.5% (n = 333) were contaminated with E. coli; also, 73.96% (n = 4644) samples from stored household sources (at point of use—POU) were found contaminated with faecal coliforms while 34.7% (n = 2179) were contaminated with E. coli. It was observed that a higher percentage of POU samples fall in the highest risk category than that of their corresponding sources. Conclusions From our findings, it appears that secondary contamination could be a function of very high population density and could possibly occur during collection, transportation, and storage of water due to lack of knowledge of personal and domestic hygiene. Hence, awareness campaign is necessary, and the contaminated sources should be replaced. Further, the POU water should be treated by a suitable method.

Sign in / Sign up

Export Citation Format

Share Document