Preconcentration of Pb(II), Cr(III), Cu(II), Ni(II) and Cd(II) ions in environmental samples by membrane filtration prior to their flame atomic absorption spectrometric determinations

Divrikli, Ümit; Kartal, Aslıhan Arslan; Soylak, Mustafa; Elçi, Latif

doi:10.1016/j.jhazmat.2006.11.040

Cited by 146 publications

(56 citation statements)

References 27 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Water pH and EC were determined on site using a calibrated multi-parameter tester 35 (Eutech Instruments, USA). Water samples were preconcentrated before analysis following procedures described by Divrikli et al (2007). An acidified water sample (300ml) was put in a beaker and the pH was adjusted to 9 using 0.1MNaOH.…”

Section: Sampling and Sample Analysismentioning

confidence: 99%

Potential ecological risk assessment of a stream in Shamva, Zimbabwe

Kanda

Ncube

Takura

2017

Environ. Earth Ecol.

View full text Add to dashboard Cite

Water bodies are the final sinks of all pollution with more than 90% of contaminants found in suspended particulates and bottom sediments. Only less than 10% is retained in the water column yet it attracts and receives great research attention. The pollution status and the potential ecological risk of three pools of water along a stream due to heavy metal enrichment from a nearby active gold mining tailings dam were assessed. The upstreamdownstream and sedimentological approaches to ecosystem health assessment were used. Potential uses of pool water were also evaluated based on measured water quality parameters. Heavy metals in water and sediment were determined using Flame Atomic Absorption Spectrometry. Results revealed that salinisation, acidification and heavy metals were exported from a mining tailings dam to the stream. The degree of contamination of pool water by heavy metals dictated water uses. Heavy metal concentrations imposed water use restrictions for aquatic life in a pool which directly received discharge from the mine tailings dam. The average heavy metal concentrations in sediments were lower than the standard shale values. Sediment quality guidelines and pollution indices showed that the stream was not polluted with heavy metals, thus posed no potential ecological risk. Continuous monitoring of tailings discharge and wash off is important to safeguard aquatic ecosystem and public health.

show abstract

Section: Sampling and Sample Analysismentioning

confidence: 99%

Potential ecological risk assessment of a stream in Shamva, Zimbabwe

Kanda

Ncube

Takura

2017

Environ. Earth Ecol.

View full text Add to dashboard Cite

show abstract

“…Sewage sludge and bovine liver samples were prepared according to the reported method. 22 A 0.5 g amount of standard reference material was mixed with 10 mL of aqua regia solution at room temperature for 24 h, and then heated to 95 C. After the evaluation of NO2 fumes had ceased, the mixture was evaporated almost to dryness and mixed with 10 mL of aqua regia. The mixture was again evaporated to dry.…”

Section: Manifold and Proceduresmentioning

confidence: 99%

On-line Determination of Zinc in Water and Biological Samples after Its Preconcentration onto Zincon Anchored Polyurethane Foam

2015

View full text Add to dashboard Cite

A fast and sensitive on-line procedure for the determination of zinc in water and biological samples was developed. Zinc was preconcentrated in a mini-column packed with polyurethane foam (PUF) chemically modified with zincon via -N=N-bonding. The optimal conditions for preconcentration were pH 8.5 and sample flow rate of 4.0 mL min -1 . Quantitative desorption of Zn(II) was obtained by 0.1 mol L -1 hydrochloric acid and subsequent spectrophotmetric determination using 4-(2-pyridylazo)-resorcinol at 498 nm. The obtained detection limit was found to be 3.0 ng mL -1 , precision (RSD) was 4.8 and 6.7% at 20 and 110 ng mL -1 , respectively, for 60 s preconcentration time and enrichment factor was 31. The linearity range was from 10 to 120 ng mL -1 and maximum sample throughput was 20 h -1 . Finally, the method was successfully applied to the determination of zinc in tap water, Nile River water and human urine samples with RSD in the range of 1.1 -8.3%.

show abstract

“…Nevertheless, it has some difficulties, such as the presence of lower levels of metals ions in samples than the limit of detection of flame atomic absorption spectrometry, and the presence of interfering effects of the matrix components of the working media [4,5]. In order to overcome these limitations, several preconcentration techniques such as solid phase extraction (SPE) [6], ion exchange [7], cloud point extraction [8], membrane filtration [9], liquid-liquid extraction [10] and coprecipitation [11] have been extensively developed. Among different separation and preconcentration techniques, SPE is advantageous over other sample pretreatment techniques in terms of simpler and faster operation, higher enrichment factors with better recoveries, quicker phase separation, lower cost and reduced consumption of organic solvents as well [12].…”

Section: Q2mentioning

confidence: 99%