metals in water Articles
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Application: Heavy metals in industrial waste water
Today heavy metals in waste water are seen as one of the biggest problems of pollution. The attention of local governments to decrease the concentration of heavy metals in waste water is continuously increasing. The Problem: The online measurement of Industrial Waste Water introduces two technical problems to be solved. First, the complex waste water matrix will interfere with any accurate ...
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ANDalyze DNA sensor Technology
Video describing the use of DNA as a sensor for detecting heavy metal ions in ...
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Distribution of mercury in the water and bottom sediment of the J.A. Alzate Dam, Mexico
In this paper, mercury concentration in the soluble, particulate and total fractions of water and in the sediment from the Jose Antonio Alzate Dam in the State of Mexico was evaluated using neutron activation analysis in order to determine the bioavailability and distribution of this metal. Sampling was carried out on three separate seasons – cold dry season, hot dry season and rainy season – ...
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Accounting for metal bioavailability in assessing water quality: A step change?
Bioavailability of metals to aquatic organisms can be considered to be a combination of the physicochemical factors governing metal behavior and the specific pathophysiological characteristics of the organism's biological receptor. Effectively this means that a measure of bioavailability will reflect the exposures that organisms in the water column actually “experience”. This is important ...
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Bioaccumulation of heavy metals in organs of fresh water fish Cyprinus carpio (Common carp)
The objective of the present study is to determine the bioaccumulation of heavy metals in various organs of the fresh water fish exposed to heavy metal contaminated water system. The experimental fish was exposed to Cr, Ni, Cd and Pb at sublethal concentrations for periods of 32 days. The elements Cd, Pb, Ni and Cr were assayed using Shimadzu AA 6200 atomic absorption spectrophotometery and the ...
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Evaluation of Drinking Water Quality by EPA-Certified Graphite Furnace AAS
With the development of residential homes in all parts of the World, there is a need for accurate, high-volume measurements of various Metals in the Drinking Water that people in these residences will live on. Accurate measurements of specific metals will determine the types of pipes used, the lifetime of the plumbing, the potential for mineral stains on porcelain, and more importantly, ...
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Cadmium ion adsorption by amine-modified activated carbon
Cadmium (Cd) is one of the most toxic metals found in water and sediments. In the effort to develop an effective adsorbent for aqueous Cd removal, activated carbon (AC) was modified with an amino-terminated organosilicon (3-aminopropyltrimethoxysilane, APS). Response surface methodology was used to optimize selected operational parameters of adsorption of aqueous Cd by considering a central ...
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Using LC50 for metals as Water Quality indicator
One of the causes of low yields or productive deficiencies, in the stage of production of fresh water, more gifts in the aquaculture industry of salmon in Chile, has its origin in the presence of naturally occurring metals, both in bodies of fresh water as in deep wells. The toxicity of metals such as Aluminum and Copper, others, has been described previously and their presence in waters of our ...
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Investigation of the use of TiO2 doped with metal ions in water disinfection
This research was conducted to improve titanium dioxide by transition metal doping using cooper. Sol gel method was used to prepare metal doped TiO2. Titanium isopropoxide and commercial TiO2 P25 were employed as catalyst precursor. The role played by the varied preparation parameters such as doping level and pH of solution discussed with respect to the final photoreactivity. Photoreactivity was ...
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Assessment of toxic metals in water and sediment of Pasur River in Bangladesh
This study was conducted to assess the levels of toxic metals like arsenic (As), chromium (Cr), cadmium (Cd), and lead (Pb) in water and sediments of the Pasur River in Bangladesh. The ranges of Cr, As, Cd, Pb in water were 25.76–77.39, 2.76–16.73, 0.42–2.98 and 12.69–42.67 μg/L and in sediments were 20.67–83.70, 3.15–19.97, 0.39–3.17 and 7.34–55.32 mg/kg. The level of studied metals in water ...
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Heavy metal levels in tap water in Batina Region, Oman
Most household in Batina depend on private wells for their fresh water supplies. The quality of such water is not regulated or tested by authorities and, therefore, consumers' health might be at risk if water is contaminated. We assessed the contribution of some heavy metals to water pollution. Water samples from 364 houses were collected and analysed for levels of lead, chromium, nickel and ...
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Study on water pollution along the Kukshet Lakes of Nerul, Navi Mumbai, India with special reference to pollution due to heavy metals
Monitoring and assessment of fresh water has become an environmental concern due to the contamination by human kind, thereby decreasing the suitability of the fresh water. The Kukshet Lake, which is the study area of the present investigation receives domestic raw sewage from surrounding habitation; so also the activities like cattle washing, cloth washing, bathing, religious activities like idol ...
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Carbon nanotubes and graphenes as adsorbents for adsorption of lead ions from water: a review
Nanomaterials have wide applications as sorbents for water purification as they have high selectivity as well as capacity for organic/inorganic pollutants and contaminants in aqueous solutions. Non-essential toxic heavy metals present in water have become a major cause of many diseases, ageing, and genetic problems. Carbon-based nanomaterials have generated great interest in their use as ...
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Spatial Analysis and Geographical Distribution of Heavy Metal Contamination in Urban House Water Reservoirs at Khamis Mushait City, Assir, Saudi Arabia
To determine the most common heavy metals in the different water reservoirs used for drinking water supply in houses located at Khamis Mushait city, Saudi Arabia (see Map1 and; (Fig.1-6, Table 1,2), Maps 2-10). To compare the results of the determined heavy metals with the standards set by Saudi Arabia Standards Organization and other international regulatory standards (Table 3). The ...
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Study on the determination of heavy metals in water samples with ultrasound-assisted dispersive liquid–liquid microextraction prior to FAAS
A new, simple and rapid method based on dispersive liquid–liquid microextraction (DLLME) was developed for extracting and preconcentrating copper (Cu), nickel (Ni), lead (Pb) and cadmium (Cd) in water samples prior to flame atomic absorption spectrometry (FAAS) analysis. 1-(2-thiazolylazo)-naphthol (TAN) was used as chelating reagents, and non-ionic surfactant Triton X-114 and CCl4 as ...
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High-performance cellulose acetate/polysulfone blend ultrafiltration membranes for removal of heavy metals from water
Neat cellulose acetate (CA) and CA/polysulfone (PSf) blend ultrafiltration membranes in the presence of polyvinylpyrrolidone as a pore former were prepared via a phase inversion technique. The prepared membranes were characterized by Fourier transform infrared, scanning electron microscopy, mechanical strength, water content, porosity, permeate flux and heavy metals (Pb2+, Cd2+, Zn2+ and ...
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Water pollution study of the Shirvane and Nerul lakes situated at Nerul, Navi Mumbai, India
The areas of study selected in the present investigation are Shirvane and Nerul lakes situated at Nerul which is considered as the queen of Navi Mumbai, the city on the west coast of the Indian state of Maharashtra. The lake areas receive domestic raw sewage from surrounding habitation; so also the activities like cattle and cloth washing, bathing, religious activities like idol immersion etc. ...
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Effects on the zooplankton community of pollutant disposal into the Jose Antonio Alzate dam, Mexico
To study the influence of pollutants on water quality from the Jose Antonio Alzate dam in Mexico, plankton samples were taken from locations along an approximately 9 km in a downstream direction. Determinations were made of pH, dissolved oxygen, biochemical oxygen demand, transparency, conductivity, and metal levels in plankton. The dam waters were generally hard, with high levels of electrolytes ...
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Heavy metal contamination from electronic waste recycling at Guiyu, southeastern China
This study evaluated the effect of electronic waste (e-waste) recycling activities at a regional center, Guiyu, Guangdong, China on heavy metal pollution in the surrounding waterway system. Surface water and sediment collected from the Lianjiang River and its tributaries were analyzed for concentrations of Cu, Pb, Ni, Cd, Hg, and As. Spatially, heavy metals in water and sediment samples decreased ...
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Analysis of metal concentration levels in water, sediment and fish tissues from Toledo municipal lake by applying SR-TXRF technique
The main objective of this study was to evaluate the metal content in water and sediment from the Toledo municipal lake, as well as the concentration levels of heavy metals in muscle and liver of four fish species. A digestion procedure was performed in all fish samples. Metal analysis was performed by using the Synchrotron Radiation X-ray Fluorescence technique. The accuracy and validity of the ...
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