1. Quality assurance for environmental analysis

Quevauviller, Ph.; Maier, E. A.; Griepink, B.

doi:10.1016/s0167-9244(06)80002-8

Cited by 53 publications

(12 citation statements)

References 28 publications

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“…Electroplating and leather industries are the major cause for high amount of chromium in the biosphere. This huge quantity of chromium salts discharged as tannery waste has raised several ecological concerns [4].…”

Section: Introductionmentioning

confidence: 99%

“…The presence of additional amounts of Cr in the soil is caused by human activity. Chromium takes place as Cr(III) cation only in a strongly acidic and reducing medium, while Cr(VI) occurs in a strongly basic and oxidizing medium as CrO 4 2− anion [9][10][11][12]. Because of the tendency of Cr(III) to bind to cell walls of plants, it is mainly concentrated in roots [13].…”

Section: Introductionmentioning

confidence: 99%

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Determination of Total Chromium and Chromium Species in Kombolcha Tannery Wastewater, Surrounding Soil, and Lettuce Plant Samples, South Wollo, Ethiopia

Asfaw

Tadesse

Ewnetie

2017

Advances in Chemistry

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This research paper deals with the determination of total chromium (total Cr), Cr(III), and Cr(VI) in Kombolcha leather industrial wastewater and the surrounding (soil and lettuce plant) samples where the wastewater flows. The levels of total Cr, Cr(VI), and Cr(III) in wastewater, soil, and lettuce plant samples were determined by FAAS, UV/Vis spectrophotometer, and difference (Cr(VI) from total Cr), respectively. Among all samples taken, the maximum amounts of total Cr, Cr(III), and Cr(VI) were obtained at the discharging point and the minimum amounts of total Cr and Cr(III) were found downstream (400 m from the junction) of Kombolcha leather industrial wastewater. On the other hand, the minimum concentration of Cr(VI) was obtained in lettuce plant sample. The amounts of total Cr in all samples except soil sample were above the permissible limit as set by WHO/FAO. The concentrations of Cr(III) in all wastewater samples were above the permissible level, whereas the concentration of Cr(VI) in wastewater was above the permissible level except 400 m from the junction. The result showed that a remarkable elimination of total Cr and Cr species has not been achieved by this leather industry as its level was not much decreased when entered into the water systems. Therefore, effective treatment methods should be applied to the wastewater for the wellbeing of the surroundings.

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Determination of Total Chromium and Chromium Species in Kombolcha Tannery Wastewater, Surrounding Soil, and Lettuce Plant Samples, South Wollo, Ethiopia

Asfaw

Tadesse

Ewnetie

2017

Advances in Chemistry

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“…Although the International Agency for Research on Cancer (IARC) has classified As a human carcinogen (IARC 1987), the U.S. EPA has classified only As inorg as carcinogenic (U.S. EPA 1984). Organic As was found less toxic than As inorg , and As III has been considered more toxic than As V (Quevauviller et al 1995). New data indicate oxidative stress from chronic arsenic exposure (Pi et al 2002).…”

Section: Article | Environmental and Urinary Arsenicmentioning

confidence: 99%

Association between arsenic exposure from a coal-burning power plant and urinary arsenic concentrations in Prievidza District, Slovakia.

Ranft

Miskovic

Pesch

et al. 2003

Environ Health Perspect

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To assess the arsenic exposure of a population living in the vicinity of a coal-burning power plant with high arsenic emission in the Prievidza District, Slovakia, 548 spot urine samples were speciated for inorganic As (As inorg ), monomethylarsonic acid (MMA), dimethylarsinic acid (DMA), and their sum (As sum ). The urine samples were collected from the population of a case-control study on nonmelanoma skin cancer (NMSC). A total of 411 samples with complete As speciations and sufficient urine quality and without fish consumption were used for statistical analysis. Although current environmental As exposure and urinary As concentrations were low (median As in soil within 5 km distance to the power plant, 41 µg/g; median urinary As sum , 5.8 µg/L), there was a significant but weak association between As in soil and urinary As sum (r = 0.21, p < 0.01). We performed a multivariate regression analysis to calculate adjusted regression coefficients for environmental As exposure and other determinants of urinary As. Persons living in the vicinity of the plant had 27% higher As sum values (p < 0.01), based on elevated concentrations of the methylated species. A 32% increase of MMA occurred among subjects who consumed homegrown food (p < 0.001). NMSC cases had significantly higher levels of As sum , DMA, and As inorg . The methylation index As inorg /(MMA + DMA) was about 20% lower among cases (p < 0.05) and in men (p < 0.05) compared with controls and females, respectively.

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“…As usual in the case of this type of certification circuit, each laboratory was free to use the instrumental approach with which it had more expertise and to pretreat the specimens as necessary to adequately subject to the technique of choice. In this connection it is worth mentioning that for the techniques requiring the presentation of samples in liquid form (CV-AAS, ETA-AAS, FAAS, ICP-AES, ICP-MS) the dissolution of sediment was achieved mostly by microwave digestion using various mixtures of acids, such as HNO 3 , H 3 PO 4 , HClO 4 , H 3 BO 3 , HF, H 2 SO 4 , and HCl. Only in one case was the digestion carried out in high-temperature sealed Teflon bombs.…”

Section: Organization Of the Certification Campaignmentioning

confidence: 99%

Certified Reference Materials for Research in Antarctica: The Case of Marine Sediment

Caroli

Senofonte

Caimi

et al. 1998

Microchemical Journal

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1. Quality assurance for environmental analysis

Cited by 53 publications

References 28 publications

Determination of Total Chromium and Chromium Species in Kombolcha Tannery Wastewater, Surrounding Soil, and Lettuce Plant Samples, South Wollo, Ethiopia

Determination of Total Chromium and Chromium Species in Kombolcha Tannery Wastewater, Surrounding Soil, and Lettuce Plant Samples, South Wollo, Ethiopia

Association between arsenic exposure from a coal-burning power plant and urinary arsenic concentrations in Prievidza District, Slovakia.

Certified Reference Materials for Research in Antarctica: The Case of Marine Sediment

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