heavy metal sampling Articles
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Heavy metals in seawater, sediments and biota from the coastal area of Yancheng City, China
A systematic investigation was carried out to analyze the concentration levels of heavy metals in the sample seawater, sediments and biota collected from the coastal area of Yancheng City of Jiangsu Province of China. An assessment was carried out on the impact of these heavy metals in different environmental samples in terms of potential risks to ecology and also to the human population ...
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Preliminary assessment of heavy metals levels of soils of an oil field in the Niger Delta, Nigeria
Abstract: This communication presents the results of preliminary investigation of the characteristic levels of heavy metals in surface soils of an oilfield in the Niger Delta. The results indicate higher concentration of the following metals: Cd, Pb, Cu; Ni, Zn, Cr, Mn and Hg in soils around the gas plant than the pipeline areas. There is a significant temporal and spatial variation in the ...
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Determination of the Environmental TCLP Metals in Waste-Waters, Solid Wastes, and Soils by Flame Atomic Absorption Spectrophotometry
Hazardous wastes can originate from many sources – industrial processes, product formulations, synthetic operations, virtually any manufacturing business. The nature and composition of the “wastes” can vary so much that one industry’s discharge can serve as another’s raw materials. It is the tremendous transfer of these materials – their storage, transportation, spillage and leakage into ...
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Removal of heavy metals from samples of residual sludge
Nitric acid leaching processes were evaluated for removal of heavy metals from samples of residual sludge from an industrial and municipal wastewater plant. The study showed that an acid:water ratio of 1:1 and a nitric acid concentration of 2 mol 1−1 gave efficient removal of 86.7%, 100% and 100% of copper, nickel and arsenic.Keywords: heavy metals, nitric acid leaching, ...
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What `Total` means, in heavy metal detection
For in-process and on-line measurements of heavy metal content in industrial samples there is no time for special and time consuming laboratory-type sample preparation. All sample preparation must be done continuously in one step: Interference influences must be eliminated. Oxidation stages have to be taken into account (or separated and excluded). Complexes have to be destroyed to free the ...
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Leaching of heavy metals from wastewater sludge, using a thermostatted column
We have previously patented a process for the extraction of toxic and valuable metals from foundry sands using a thermostatted column. In this paper, we describe a similar device for the removal of toxic metals from wastewater sludge. The wastes were finely ground and suspended in an aqueous pulp, and 10-40g of mineral acid or sodium hydroxide were added to reach a pH of 2, 5, 7 and 10, together ...
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Evaluating the mobile heavy metal pool in soakaway sediment, road dust and soil through sequential extraction and isotopic exchange
Selective sequential dissolution (SSD) and isotopic dilution are two most commonly applied techniques for the measurement of mobile fraction of heavy metal present in the urban environment. This work examined the compliance between SSD proposed by the Community Bureau of Reference (BCR) and isotopic dilution technique (IDT) for determination of mobile pool of heavy metal contained in soakaway ...
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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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Seasonal variation in bacterial heavy metal biosorption in water samples from Eziama river near soap and brewery industries and the environmental health implications
Abstract: Seasonal variation in bacterial heavy metals biosorption from soap and brewery industrial effluent samples from Eziama River in Abia State were analyzed for Pb, Hg, Fe, Zn, As, and Mn, using atomic absorption spectrophotometry. Bioaccumulation of the metals by bacteria showed the following trend > Fe >Zn >As > Pb > Mn (Rainy Season) and Zn > Fe > Mn > As > Hg > Pb (Dry season). ...
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Adsorption of heavy metals from aqueous solutions by Mg–Al–Zn mingled oxides adsorbent
In our study, Mg–Al–Zn mingled oxides were prepared by the co-precipitation method. The structure, composition, morphology and thermal stability of the synthesized Mg–Al–Zn mingled oxides were analyzed by powder X-ray diffraction, Fourier transform infrared spectrometry, N2 physisorption, scanning electron microscopy, differential scanning calorimetry and thermogravimetry. Batch experiments ...
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Sustainable reuse potential of municipal sewage sludge in south–east Australia
With the aim of reusing municipal sewage sludge, this paper presents the chemical and organic properties of sludge from a major sewage treatment plant in south–eastern Australia. The results show that the concentrations of all OCPs and majority of PAHs were below or close to laboratory detection limits. Concentrations of heavy metals in sludge samples were compared with typical sludge testing ...
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Bolderwood Campus Southampton (2) – Case Study
Project Highlights Envirochem carried out broad spectrum radiological and chemical sampling within confined spaces to ascertain the extent of residual contamination within outlet drain sediments, constructional surfaces and nearby soils. Envirochem were able to draw together many different methods of access, sampling and analytical testing into one project. Project Description The redirection ...
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Efficient removal of Cu(II) and Pb(II) heavy metal ions from water samples using 2,4-dinitrophenylhydrazine loaded sodium dodecyl sulfate-coated magnetite nanoparticles
This study reports on synthesis of a new nanoadsorbent for efficient Cu(II) and Pb(II) ions removal from water samples. In this regard, magnetite nanoparticles have been modified with 2,4-dinitrophenylhydrazine. The synthesized adsorbent has been fully characterized using scanning electron microscope, X-ray diffractometer, Fourier transform infrared spectrometer, and Brunauer, Emmett, and ...
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Identification of source of heavy metal contamination in a site - a case study
Accidental spills and improper disposal of industrial effluent/sludge containing heavy metals onto the open land or into subsurface result in soil and water contamination. Detailed investigations are carried out to identify the source of contamination of heavy metals in an industrial suburb near Bangalore in India. Detailed investigation of ground water and subsurface soil analysis for various ...
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Analysis of the heavy metal pollutants in sediment samples collected from Thane Creek of Maharashtra, India
The wetland of Thane Creek, located at Thane, Mumbai, India, has attracted much attention of environmental biologists over the last few decades, as this creek has been subjected to a lot of pollution from the Asia's biggest Thane–Belapur industrial complex located at the south of Mumbai harbour along the west coast of India. This paper advocates ecological studies with special reference to the ...
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Soil fertilization with wastewater biosolids – monitoring changes in the ‘soil–fertilizer–plant’ system and phosphorus recovery options
The aim of this study is to establish changes that may occur after a prolonged application of wastewater sludge treated to biosolids, in the ‘soil–fertilizer–plant’ system. Thirteen experimental plots with different soil types planted with experimental crops were investigated in order to evaluate the suitability of these biosolids as soil conditioners and fertilizers. The biosolids were ...
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Study of colloidal content and associated heavy metals in landfill leachate: a case study of El-Akader landfill site: Jordan
Landfill leachate samples were collected anaerobically at six locations at the El-Akader landfill site in North Jordan. The collected leachate samples were separated into size fractions with special attention to the distribution of colloids and associated heavy metals. The fraction sizes were 1.2 µm. The maximum concentrations of heavy metals in the analysed leachate samples were Cd 0.6 µg/l, Ni ...
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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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Accumulation of heavy metals in the bottom sediments of the Irkutsk Reservoir
The chemical composition of the bottom sediment, and more particularly the heavy metals content, reflects human developments and impacts on the catchment and reservoir's natural environment. The bottom sediments of the reservoir retained by the Irkutsk Dam have been analysed. The reservoir is mainly supplied by water from Lake Baikal. The following amounts of heavy metals have been found in the ...
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Qualitative and Quantitative Analysis of Seafood by EDXRF
X- ray fluorescence analysis, in addition to its effectiveness in analysis of inorganic materials such as metals and ceramics, is also effective for the detection and quantitative analysis of minerals and heavy metals in foods. Not only can samples be analyzed directly without conducting time-consuming pretreatment, sensitive and accurate measurement is also possible using simple preparation ...
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