Effects of Flooding on Lead and Cadmium Speciation in Sediments from a Drinking Water Reservoir

Chrastný, Vladislav; Komárek, Michael; Tlustoš, Pavel; Švehla, Jaroslav

doi:10.1007/s10661-006-0801-6

Cited by 17 publications

(10 citation statements)

References 20 publications

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“…However, the content of the leachable fraction of trace elements does not necessarily correspond to the amount available to biota [3]. Metal remobilization is influenced by physicochemical conditions in the water-sediment interface, microbial activity, and hydrological factors [3][4][5][6][7].…”

Section: Introductionmentioning

confidence: 99%

Background Concentrations of Nickel in the Sediments of the Carpathian Dam Reservoirs (Southern Poland)

Szarek-Gwiazda

Czaplicka-Kotas

Szalińska

2011

Clean Soil Air Water

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The background nickel (Ni) concentrations in the sediments of two sub-mountain reservoirs (Dobczyce and Czorsztyn) situated in the Carpathian Flysh (southern Poland) were evaluated. Ni concentrations (15.6-83.1 mg g À1 dry wt.) in both reservoir sediments were affected mainly by the high background content of Ni in the surrounding watershed. Distribution of elevated Ni concentrations mostly revealed an impact of long-range transport influenced by the flow of the main tributary. Ni spatial pattern was mainly influenced by mineral compounds of Fe, Mn, and Al, and to a lesser degree by organic matter content and silt and clay fractions of the sediments of both investigated reservoirs. Spatial distribution was additionally modified by hydrological conditions (flood events and course of the old river-bed). In both reservoirs, substantial portions of Ni were bound to potentially immobile phases, i.e., moderately reducible and residual phases (64-82% in total). Laboratory experiments showed that changes in pH affected Ni leaching from the sediment to a small degree (at pH $3 up to 19.9%).Our results indicated that Ni in these reservoirs has low mobility and, therefore, poses a low toxicological risk to aquatic organisms.

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Section: Introductionmentioning

confidence: 99%

Background Concentrations of Nickel in the Sediments of the Carpathian Dam Reservoirs (Southern Poland)

Szarek-Gwiazda

Czaplicka-Kotas

Szalińska

2011

Clean Soil Air Water

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“…On the other hand, an increase in the E h can release metals bonded to sulphides. 10,[34][35][36][37] These modifications in the environmental conditions involve the first three fractions that have potential capacity of releasing metal to the environment, which can calculated by dividing these most labile fractions (F1 + F2 + F3) by the sum of all fractions (F1 + F2 + F3 + F4), expressed as a percentage as showed in Figure 3. Figure 3 shows that the mobility of Cr was below 30% in PB1 and PB2, and that reached the maximum value in the Bacanga Dam, i.e., 48% in PRB3.…”

Section: Metal Fractionationmentioning

confidence: 99%

The Role of Metals and their Fractions in the Bacanga River Estuary: an Example of the Anthropogenic Interference in a Tropical Ecosystem

Silva¹,

Corrêa²,

Marques³

et al. 2015

Revista Virtual De Química

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Papel dos Metais e suas Frações no Estuário do Rio Bacanga: um Exemplo da Interferência Antropogênica em um Ecossistema Tropical Resumo: O Rio Bacanga localizado na cidade de São Luís, estado do Maranhão-Brasil, é um estuário cuja hidrologia foi drasticamente alterada pela construção de uma barragem e pela ocupação humana. Para avaliar o papel dos metais traço (Cu, Cd, Cr, Pb, Ni e Zn) na qualidade dos sedimentos foi determinada a concentração total desses metais por espectrometria de emissão atômica por plasma indutivamente acoplado (ICP OES). As características físicas e químicas foram analisadas pelos métodos clássicos. As frações geoquímicas dos metais no sedimento foram determinadas aplicando-se a extração química sequencial, segundo protocolo da Comunidade Europeia. Os resultados foram analisados estatisticamente pelo uso da análise dos componentes principais e análise hierárquica. As concentrações dos metais demonstram que Pb e Cr apresentam risco à vida aquática segundo critérios desenvolvidos pela agência ambiental canadense. Outros metais estão abaixo desse limiar e raramente oferecem risco para a vida aquática, embora estejam em níveis superiores às condições normais naturais. A labilidade parcial dos metais apresentou a seguinte ordem: Zn (63,4%) > Cu (53,5%) > Cd (50,7%) > Pb (47,0%) > Ni (40,8%) > Cr (35,0%), tornando-se um fator que minimiza o risco ambiental. Os resultados desse trabalho indicam que os sedimentos estão contaminados por metais traço e apresentam risco à vida aquática (Pb e Cr), o que demanda ações imediatas de minimização/eliminação das fontes de poluição.

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“…Since these fractions are easily mobilizable, they form a potential threat to the environment (Tessier et al, 1979;Kabala and Singh, 2001). Kabala and Singh (2001) proposed a mobility factor (MF) to assess the behaviour of the metal in soil and sediments and which has been used by several authors (Ettler et al, 2005;Chrastny et al, 2006) MF…”

Section: Mobility Of Metals and Risk Assessment Codementioning

confidence: 99%

Speciation technique for the risk assessment of trace metals in the bed sediments of River Cooum, South India

Giridharan

Venugopal

Jayaprakash

2010

Chemical Speciation & Bioavailability

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Speciation of sediment samples yields valuable information on the nature of the metals bound to the sediments. Thirty samples of River Cooum sediment were collected during two seasons and a fractionation study was carried out. The middle and lower parts of the Cooum River flow largely through urbanized areas and are grossly polluted by industrial and domestic wastes. To ascertain the extent of heavy metal pollution in the bed sediments of the river, total metal content and speciation were evaluated. The summation of the metal recoveries in the sequential extractions was found to be within AE 10 % of the total metal content. The mobility factor was evaluated which represents the exchangeable and carbonate fractions in the sediments. Risk Assessment Code (RAC) was estimated and the results reveal the extent of risk associated with the heavy metals in the sediments in various stations. The results of the fractionation show that Ni and Pb fall in the high risk category in certain stations in the middle and lower parts of the river. Except for Cr and Fe, all other heavy metals studied show medium risk with regard to RAC. The effect of the monsoon on the concentrations of the metals in various fractions has been evaluated and the significance of seasonal effect was determined using Student's t-test.

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Effects of Flooding on Lead and Cadmium Speciation in Sediments from a Drinking Water Reservoir

Cited by 17 publications

References 20 publications

Background Concentrations of Nickel in the Sediments of the Carpathian Dam Reservoirs (Southern Poland)

Background Concentrations of Nickel in the Sediments of the Carpathian Dam Reservoirs (Southern Poland)

The Role of Metals and their Fractions in the Bacanga River Estuary: an Example of the Anthropogenic Interference in a Tropical Ecosystem

Speciation technique for the risk assessment of trace metals in the bed sediments of River Cooum, South India

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