Metal partitioning in river sediments measured by sequential extraction and biomimetic approaches

Peng, Shu Heng; Wang, Wen‐Xiong; Li, Xiangdong; Yen, Yu Fong

doi:10.1016/j.chemosphere.2004.07.015

Cited by 90 publications

(38 citation statements)

References 35 publications

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“…A large portion of reducible fraction was found in the downstream of the Karra River (Fig.1). The result indicates that considerable amount of Mn may be released into environment if conditions become more acidic (Peng et al 2004). be higher than 0.7 for Ni-Cr and 0.45 for Fe-Mn (Table 1).…”

Section: Metal Distributionmentioning

confidence: 96%

Distribution and Fractionation of Heavy Metals in Sediments of Karra River, Hetauda, Nepal

Pradhanang

2015

J. Inst. Sci. Tech.

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A five-step sequential extraction procedure was applied for the determination of the distribution of four elements (Cr, Mn, Fe, and Ni) in sediment of the Karra River. Sediment samples were collected from 16 different sites in the Karra River (upstream, industrial belt, downstream). The distribution of trace metals among exchangeable, carbonate, reducible, oxidizable and residual fractions were determined. The total concentration of metals varies in the range of Cr 72-4339.54 mg kg . The accuracy evaluated by comparing total trace metal concentrations with the sum of the five individual fractions proved to be satisfactory. The chemical speciation of Cr, Mn, Fe, and Ni in most sampling stations were in the order of residual > reducible > oxidazable > carbonate> exchangeable. Fractionation analysis showed that dominant metals are in residual fraction. The highest metal concentrations were observed at the most polluted sites of the industrial belt. High concentration of chromium was found in the Fe-Mn oxide and organic fraction in some of the sites of industrial belt.

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Section: Metal Distributionmentioning

confidence: 96%

Distribution and Fractionation of Heavy Metals in Sediments of Karra River, Hetauda, Nepal

Pradhanang

2015

J. Inst. Sci. Tech.

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“…The capacity of adsorbed copper was calculated using Eq. (1). (1) …where q e is the metal uptake (mg/g), C o (mg/L) and C f (mg/L) are the initial and final metal concentrations in the solution, respectively, and V (L) and M (g) are the solution volume and mass of the adsorbent, respectively.…”

Section: Batch Adsorption Experimentsmentioning

confidence: 99%

“…Human exposure to waters polluted with even trace levels of heavy metals causes several health problems [1][2][3][4][5][6]. Polluted water containing heavy metals is of major concern [7], and several conventional methods -including but not limited to chemical precipitation, lime softening [8], and reverse osmosis [9][10][11][12] have been employed for heavy metal removal from industrial wastewaters.…”

Section: Introductionmentioning

confidence: 99%

Absorption Behaviours of Copper, Lead, and Arsenic in Aqueous Solution Using Date Palm Fibres and Orange Peel: Kinetics and Thermodynamics

Amin¹,

Alazba²,

Amin³

2017

Pol. J. Environ. Stud.

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In this study, date palm fibres and orange peel in both individual and hybrid forms were studied for the removal of copper, lead, and arsenic. Equilibrium was achieved after 150 minutes, and the highest and the lowest removal efficiencies were for Cu +2 and As(V), respectively. A slightly higher removal efficiency of metal ions using orange peel was observed, which could be due to the greater number of functional groups on the chemically pre-treated adsorbent. The highest removal was observed at pH 6, and the adsorption data exhibited a linear increase in metal removal capacity with increasing adsorbent concentrations from 0.1 to 2 g/L. A significantly higher removal efficiency was observed for a 45 µm particle size compared to larger particle sizes. Additionally, a 30-40% decrease in removal efficiencies was observed for all three heavy metal ions when using the date palm fibres or the hybrid adsorbent when the initial metal concentrations were increased from 20 to 80 mg/L. The Freundlich model agreed with the experimental data slightly better than the Langmuir model for both date palm fibres and the hybrid adsorbent. A pseudo second-order kinetic model better described the kinetic behaviour of As(V) adsorption on the investigated adsorbents. Date palm fibres exhibited exothermic adsorption, while both orange peel and the hybrid adsorbent displayed exothermic and endothermic reactions. Increased randomness at the solid-liquid interface was observed for all adsorbents, and the Gibbs free energy change values were negative, confirming the spontaneous nature of adsorption, which proceeded in the forward direction.

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“…Also among the 'nonresistant' fractions, the major portion of heavy metals especially Cu and Zn concentrated into the 'oxidisable organic' fraction in sediments from all the locations in the north. The major form of Cu-organic complexes in the sediment has been suggested by several authors (Fan et al, 2002: Peng et al, 2004. This might be due to the high affinities of these elements especially Cu to humic substances, which are components of organic matter as the heavy metal in this fraction could easily form complexes with organic matter (Pempkowiak, 1999: Ramos et al, 1999.…”

Section: Metal Speciationmentioning

confidence: 99%

Significant correlation of Cd, Cu, Pb and Zn in sediments and oysters (Saccostrea cucullata) collected from Qeshm Island, Persian Gulf, Iran

Shirneshan¹,

Bakhtiari²,

Seyfabadi³

et al. 2013

Chemical Speciation & Bioavailability

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The relationships are evaluated between the heavy metal species in sediments and the accumulation by the soft tissues of Saccostrea cucullata collected from the northern and southern coasts of Qeshm Island, Persian Gulf. The sequential extraction technique was employed to fractionate the sediment into non resistant and resistant fractions. Data from sequential extractions indicated that the metals were mainly associated with the residual fraction at the north coast and with non residual fractions at the south coast. The results showed that the best correlations were observed between heavy metals concentrations in soft tissues and the fractions in the southern sediment. Note that the bioavailability of trace metals is influenced by the chemical characteristics and properties of the sediment. Therefore, the present results generally supported the use of soft tissues of S. cucullata as a more accurate biomonitoring organism for Cu, Pb and Cd in sediments from the southern coast of Qeshm Island, Persian Gulf.

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Metal partitioning in river sediments measured by sequential extraction and biomimetic approaches

Cited by 90 publications

References 35 publications

Distribution and Fractionation of Heavy Metals in Sediments of Karra River, Hetauda, Nepal

Distribution and Fractionation of Heavy Metals in Sediments of Karra River, Hetauda, Nepal

Absorption Behaviours of Copper, Lead, and Arsenic in Aqueous Solution Using Date Palm Fibres and Orange Peel: Kinetics and Thermodynamics

Significant correlation of Cd, Cu, Pb and Zn in sediments and oysters (Saccostrea cucullata) collected from Qeshm Island, Persian Gulf, Iran

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