Comparison of unmodified and modified BCR sequential extraction schemes for the fractionation of heavy metals in shrimp aquaculture sludge from Selangor, Malaysia

Nemati, Keivan; Bakar, Nor Kartini Abu; Abas, Mhd Radzi Bin; Sobhanzadeh, Elham; Low, Kah Hin

doi:10.1007/s10661-010-1584-3

Cited by 50 publications

(26 citation statements)

References 14 publications

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“…Taking into account both of sediments, we selected concentration of 0.5 mol L -1 and pH at 1.5, with which little organic matter could be attack and considerably large amount of Ca, Fe and Mn could be extracted. Rao et al (2008) and Nemati et al (2011) also conclude that increasing the concentration of NH 2 OHÁHCl from 0.1 to 0.5 mol L -1 and decreasing the pH from 2 to 1.5 provided effective attack on the iron oxide phases.…”

Section: Selection Of Extracting Conditions For Fe/mn Oxides Bound Camentioning

confidence: 94%

“…Calcium bound P is insensitive to redox potential and once deposited in bottom sediments, it may get long-term retention (Kufel et al 2013). Sediment is an important storage sink for metals (Mishra et al 2008;Nemati et al 2011). The mobility and bioavailability of metals strongly depend on their specific chemical forms and ways of binds to each of the different phase (Karadas and Kara 2012).…”

Section: Introductionmentioning

confidence: 99%

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Sequential extraction of calcium in lake sediments for investigating the cycle of phosphorus in water environment

Liu

Zhu

et al. 2014

Int. J. Environ. Sci. Technol.

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The role of calcium (Ca) in the cycle of phosphorus in water environment depends on the speciation of Ca in sediments, and reliable Ca sequential extraction method is useful for obtaining information about Ca transport processes from sediment to water. Experiments have been carried out to develop a simple but robust Ca sequential extraction method for identification of Ca portioning in sediments. The sequential extraction protocol was modified for extractants, extracting time, concentration and pH of the reagents in the first three steps of Tessier sequential procedure. With optimum conditions, there were 1:25 sediment to solution ratio and 3 h of extracting time shaken with NH 4 AC (1 mol L -1 , pH 7.0) (exchangeable Ca fraction); 1:25 sediment to solution ratio and extracted with NH 4 AC (1 mol L -1 , pH 5.0) for 5 h (carbonatebound Ca fraction); and 1:30 sediment to solution ratio and extracted with NH 2 OHÁHCl (0.5 mol L -1 , pH 1.5) for 6 h (Fe and Mn oxides bound Ca fraction). The recovery for Tessier procedure ranged form 35.6 to 71.1 %, while the recovery for the modified Tessier procedure ranged form 46.1 to 86.9 %. These results revealed that Tessier procedure underestimated the proportion of Ca in exchangeable fraction. In sediments, Ca was mainly exchangeable and carbonate bound, which was considered as the most liable fractions.

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Section: Selection Of Extracting Conditions For Fe/mn Oxides Bound Camentioning

confidence: 94%

Section: Introductionmentioning

confidence: 99%

Sequential extraction of calcium in lake sediments for investigating the cycle of phosphorus in water environment

Liu

Zhu

et al. 2014

Int. J. Environ. Sci. Technol.

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“…This step was commonly employed by many authors e.g. [17][18][19][20] as a supplementary step to the procedure.…”

Section: Methodsmentioning

confidence: 99%

Effect of Flooding on Heavy Metals Contamination of Vistula Floodplain Sediments in Cracow; Historical Mining and Smelting as the Most Important Source of Pollution

Jarosz‐Krzemińska¹,

Strzebońska²,

Kostka³

et al. 2015

Pol. J. Environ. Stud.

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IntroductionRiver bottom and flood sediments as well as soils in the historical recent mining and smelting areas need special management and monitoring. Heavy metals as the main contaminants of the soil-river system undergo many reactions and processes in the river channel, riverine floodplain, and estuarine. The fate and transport of heavy metals depends on topography, oxic-anoxic conditions and kinetics of the sorption/desorption processes. Moreover, pH, salinity, and the presence of organic matter, clay minerals, sulfates, and carbonates also affect metal mobility in floodplain sediments and soils [1][2][3].For centuries Cracow has been exposed to floods caused by the high flush of the Vistula River. Among different types of floods in the Upper Vistula catchment, Cracow has been mostly exposed to a profuse rain, which persists from a few to several days and usually appears in summer months. During such rains in a large area of the Carpathian Mountains total precipitation ranges from 100Pol. J. Environ. Stud. Vol. 24, No. 3 (2015), [1317][1318][1319][1320][1321][1322][1323][1324][1325][1326] AbstractThe discharge of high flood water (2010) into reservoirs located in the Upper Vistula River catchment and into the overloaded Vistula River channel may strongly affect water and sediment quality. To investigate the contamination of the flooded area in the center of Cracow, total of 32 sediment samples were collected along the length of the Vistula River and also from the cross section in the floodplain area. Additionally, 12 samples of the flooded sediments were collected along the Wilga River -a tributary of the Vistula located within the investigated area. The concentrations of Zn, Pb, Cd, Cu, Mn, Zn, and Fe in the bulk samples and size fraction <20 µm were studied. The metals concentration in the Vistula River flood sediment samples varied in wide ranges (mg/kg): Zn 59-1013, Pb 17-263, Cd 2.6-23, Mn 145-469, and Fe 0.70-3.59%, and was considerably higher in the size fraction samples. The concentration of Cu was low and reached up to 40 mg/kg. The highest amount of Zn was found in the sediment sample from the cross section, located 38 m from the Vistula River channel. Three-step sequential extraction revealed the most mobile metals in the sediment fraction <20 µm, which were as follows: Cd (77% of the total amount), Pb (55%), and Zn (42%). The contamination of the Wilga River flood sediments was lower when compared with Vistula River contamination.

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“…This method provided useful evidence for explaining the heavy metals immobilization. At present, the sequential chemical extraction method by Tessier et al (1979) and BCR (European Community Bureau of Reference) sequential extraction are the main methods for analysis the heavy metal speciation (Soylak et al 2004;Saracoglu et al 2009;Nemati et al 2011;Alonso Castillo et al 2011). In this paper, the sequential chemical extraction method by Tessier et al (1979) was chosen.…”

Section: Effect Of Amendment On Heavy Metal Speciationmentioning

confidence: 99%

Immobilization of Cd, Zn and Pb in sewage sludge using red mud

2011

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Sewage sludge is an inevitable end by-product of sewage treatment. Land application provides a costeffective alternative for sewage sludge disposal. However, sewage sludge contains heavy metals that may limit its application. In this work, red mud was employed for the immobilization of heavy metals in sewage sludge. The effect of red mud amendment on heavy metal immobilization was evaluated using Toxicity Characteristic Leaching Procedure (TCLP) method. The TCLP results showed that the immobilization efficiency of Cd, Zn and Pb was 100, 92, and 82%, respectively, when sewage sludge was mixed with 10% red mud. Tests carried out in leaching columns demonstrated that heavy metal concentrations in the leachate of 10% red mud amended sludge were lower than those of the unamended sludge. Moreover, red mud decreased plant available heavy metal (Cd, Zn and Pb) content from 18.1, 17.2 and 14.6% to 6.9, 11.4 and 7.6%, respectively. Sequential chemical extraction experiments showed that after sludge was amended with 10% red mud, exchangeable fraction was reduced and iron and manganese oxides fraction was increased. Red mud amendment can effectively immobilize Cd, Zn and Pb in sewage sludge before land application.

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Comparison of unmodified and modified BCR sequential extraction schemes for the fractionation of heavy metals in shrimp aquaculture sludge from Selangor, Malaysia

Cited by 50 publications

References 14 publications

Sequential extraction of calcium in lake sediments for investigating the cycle of phosphorus in water environment

Sequential extraction of calcium in lake sediments for investigating the cycle of phosphorus in water environment

Effect of Flooding on Heavy Metals Contamination of Vistula Floodplain Sediments in Cracow; Historical Mining and Smelting as the Most Important Source of Pollution

Immobilization of Cd, Zn and Pb in sewage sludge using red mud

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