A Review of Sequential Extraction Procedures for Heavy Metals Speciation in Soil and Sediments

Okoro, HK; Fatoki, Olalekan S; Adekola, Folahan A.; Ximba, Bhekumusa J; Snyman, Reinette G

doi:10.4172/scientificreports.181

Cited by 94 publications

(78 citation statements)

References 99 publications

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“…The primary source through which metals get associated with the organic materials such as living organisms, detritus etc is by bioaccumulation or complexation process (Okoro et al, 2012). The metals bound to this fraction are assumed to stay in the soil for longer period but may be immobilized by decomposition process (Kenedy et al, 1997).…”

Section: Okolie Lucky Preciousmentioning

confidence: 99%

“…These oxides scavenge and appear as coating on mineral surfaces or as fine descrete particles and it can occur as a combination of the precipitation, adsorption, surface complex formation and ion exchange (Okoro et al, 2012). However, heavy metals retained in their forms may be potential source of contamination since they could be released if there are changes in the redox status of the soil (Wassay et al, 2001, Asagba et al, 2009 Organic Matter Fraction (F 5 ): The organic bound iron was in the range 19.09 and 52.10% with an average of 39.48%.…”

Section: Iron-manganese Oxide (F 4 )mentioning

confidence: 99%

See 1 more Smart Citation

Distribution of different fractions of Iron, Zinc, Chromium, lead and Nickel in Soils around Petrol filling stations in selected Areas of Delta State, Nigeria

Osakwe¹,

Okolie²

2016

Journal of Applied Sciences and Environmental Management

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ABSTRACT:The geochemical forms of some heavy metals in soils around selected petrol filling stations were studied in order to assess the mobility and bioavailability of the metals and hence their potential environmental risk. Water soluble fraction (F 1 ) contained an average of 0.97% iron, 1.40% zinc, 2.37% chromium, 2.08% lead and 41.96% nickel with the abundance trend of Ni > Cr > Pb > Zn > Fe. Metal bound to exchangeable phase followed the same abundance trend with an average of 6.46% nickel, 5.48% chromium, 2.64% lead, 2.55% zinc and 0.62% iron. Lead was predominantly associated with carbonate fraction with an average of 52.32% followed by iron with an average of 15.41%. Other metal average levels in the carbonate fractions were 9.66% for nickel, 8.78% for chromium, and 8.73% for zinc giving the abundance trend of Pb > Fe > Ni > Cr > Zn. The most important metal in iron-manganese oxide phase was zinc with an average of 42.49%, followed by iron with an average of 32.82%. The averages of the other metals bound to this phase were 30.39%, 13.24% and 6.46% for chromium, lead and nickel respectively. The organic bound metals were in the abundance trend of Fe > Zn > Cr > Pb > Ni with average of 39.48% for iron, 30.87% for zinc, 23.03% for chromium, 8.54% for lead and 4.94% for nickel. Nickel with an average of 51.58% was predominantly associated with the residual fraction. The other metals bound to this phase in order of their importance to the fraction had the average of 22.75% for chromium, 13.96% for zinc, 12.24% for lead and 10.97% for iron. The mobility factor values of the metals were moderately high with the abundance trend of Pb > Ni > Cr > Fe > Zn. The generally low levels of the metals in the residual fraction coupled with the mobility factor trend suggest potential risk for the metals. ©JASEM

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Section: Okolie Lucky Preciousmentioning

confidence: 99%

Section: Iron-manganese Oxide (F 4 )mentioning

confidence: 99%

Distribution of different fractions of Iron, Zinc, Chromium, lead and Nickel in Soils around Petrol filling stations in selected Areas of Delta State, Nigeria

Osakwe¹,

Okolie²

2016

Journal of Applied Sciences and Environmental Management

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“…A schematic presentation of the extraction procedure is shown in Figure 2. In Table 2, a summary of the stepwise sequential extraction procedure with pH solution values is shown, which involved a carbonate-bound fraction, an iron manganese-bound fraction and an organic-bound fraction [36][37][38][39]. Graphene Materials -Advanced Applications…”

Section: Sequential Extractionmentioning

confidence: 99%

Graphene Oxide–Antimony Nanocomposite Sensor for Analysis of Platinum Group Metals in Roadside Soil Samples

Silwana¹,

Horst²,

Iwuoha³

et al. 2017

Graphene Materials - Advanced Applications

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The present study introduced a very sensitive and low-cost analytical procedure based on voltammetry to study platinum group metals in road dust and roadside soil matrices. Cathodic stripping voltammetry in conjunction with a reduced graphene oxide-antimony nanocomposite sensor and ICP-MS analysis were used to analyse roadside soil and dust samples. The results were processed to evaluate possible pollution in order to map the distribution of the PGMs along specific roads in the Stellenbosch area, outside Cape Town. The results revealed that within each site under investigation, Pd was more abundant than Pt and Rh using both voltammetric and spectroscopic methods. The AdDPCSV results obtained showed concentrations for Pd(II) ranging between 0.92 -4.0 ng kg -1 . For Pt (II), the concentrations ranged between 0.84 -0.99 ng kg . For Rh, concentrations ranged between 0.002 -0.26 µg kg -1 . The analysis showed significant levels of all PGMs in soil and dust samples analysed. Metal concentration in dust and soil followed the trend Pd > Pt > Rh using both voltammetric and spectroscopic techniques.

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“…Virtually immobile organic fraction may be started in the intensified aerobic conditions. The residual fraction is not dangerous for the ecosystem because it is virtually immobile [14,[17][18][19][20].…”

Section: Sequential Extractionmentioning

confidence: 99%

The Use of Sequential Extraction for Assessing Environmental Risks of Waste Incineration Bottom Ash/Wykorzystanie Ekstrakcji Sekwencyjnej Do Oceny Zagrożeń Dla Środowiska Powodowanych Przez Żużle I Popioły Z

Wielgosiński

Wasiak

Zawadzka

2014

Ecological Chemistry and Engineering S

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Thermal treatment of waste is one of the ways of their processing. It is commonly used in most developed countries of the European Union. Major by-products of the combustion processes are slag and bottom ash. In the majority of EU countries bottom ash and slag are used as a priming for road construction. In Poland slag and bottom ash from incineration process are stabilized with the addition of cement and some polymers and are landfilled as wastes. In accordance to Polish law, depending on the leaching of heavy metals from fly ash and slag after thermal treatment of waste can be regarded as both hazardous and non-hazardous wastes. At present work sequential extraction methods described in the literature: Tessier's method, van Herck's method and BCR method were compared experimentally with the results of using Swiss standard TVA.SA.1991 and European standard EN 12457 and total concentration of metals in sample analyzed after complete digestion of sample. The study sample was bottom ash from the medical waste incineration plant.

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A Review of Sequential Extraction Procedures for Heavy Metals Speciation in Soil and Sediments

Cited by 94 publications

References 99 publications

Distribution of different fractions of Iron, Zinc, Chromium, lead and Nickel in Soils around Petrol filling stations in selected Areas of Delta State, Nigeria

Distribution of different fractions of Iron, Zinc, Chromium, lead and Nickel in Soils around Petrol filling stations in selected Areas of Delta State, Nigeria

Graphene Oxide–Antimony Nanocomposite Sensor for Analysis of Platinum Group Metals in Roadside Soil Samples

The Use of Sequential Extraction for Assessing Environmental Risks of Waste Incineration Bottom Ash/Wykorzystanie Ekstrakcji Sekwencyjnej Do Oceny Zagrożeń Dla Środowiska Powodowanych Przez Żużle I Popioły Z

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