Comparison of methods for leaching heavy metals from composts

Ciba, Jerzy; Zołotajkin, Maria; Kluczka, Joanna; Loska, Krzysztof; Cebula, Jan

doi:10.1016/s0956-053x(03)00128-4

Cited by 32 publications

(21 citation statements)

References 8 publications

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“…The high portion of organically bound Cd in soil fertilized with compost was caused by the addition of stabilized organic matter into the soil and by cadmium sorption by soil organic matter as seen by Shuman et al (2001). Cadmium in the residual fraction is generally considered permanently bound in the crystal lattice and so not capable of entering the food cycle under normal conditions (Ciba et al, 2003). The highest Cd portion in the residual fraction (60%) was found in soil after the application of compost made of sewage sludge I, wood chips II and grass (treatment 2) in both triple and single rates.…”

Section: Soilsmentioning

confidence: 99%

“…Sewage sludge can serve as important source of heavy metals in many composts. Ciba et al (2003) reported that increased total heavy metal contents in compost do not necessarily mean that its application as fertilizers contributes a direct hazard to the soil. The determination of total heavy metal content does not provide sufficient information about the risks of bioavailability, the capacity for remobilization and the behavior of the metals in the environment (Hsu and Lo, 2001).…”

Section: Introductionmentioning

confidence: 99%

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Changes in cadmium mobility during composting and after soil application

et al. 2009

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Section: Soilsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Changes in cadmium mobility during composting and after soil application

et al. 2009

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“…1). Generally, the method of HM speciation was modified by Lin et al (1999) according to the comments of various publications (Qiao and Ho 1996;Hsu and Lo 2001;Ciba et al 2003;Song and Greenway 2004).…”

Section: Methodology Of Sequential Extractionmentioning

confidence: 99%

Speciation of Zn, Cu, and Pb in the soil depending on soil texture and fertilization with sewage sludge compost

Brazauskiene¹,

Paulauskas²,

Sabiene³

2008

J Soils Sediments

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Background, aim, and scope Heavy metal (HM) mobility in soil depends on the HM species in it. Therefore, knowledge of the HM speciation in soil allows the prediction of HM impact on the environment. HM speciation in soil depends on the metal chemical origin, soil texture, and other factors such as the origin and level of soil contamination. Recently, the problem of organic waste utilization is of great importance as the amount of this recyclable material is continually increasing. One of the possible ways of recycling is the use of processed organic wastes for agricultural needs. In this research, aerobically composted sewage sludge was used, the utilization of which is of essential importance. But one of the most serious restrictions is HM transfer from such material to the soil. Therefore, a prediction of HM mobility in soil and its migration in the environment is an important issue when using sewage sludge compost (SSC) in agriculture. Zn, Cu, and Pb speciation was performed according to the modified methodology of Tessier et al. (Anal Chem 51:844-851, 1979) in two different (sandy and clay) soils with background HM amounts and in soil samples amended with aerobically digested SSC to find out the predominant species of the investigated HM and to predict their potential availability. Materials and methods The modified method of sequential extraction initially proposed by Tessier et al. (Anal Chem 51:844-851, 1979) is designed for HM speciation into five species where HM mobility decreases in the order: F1-exchangeable HM (extracted with 1 M MgCl 2 at an initial pH of 7 and room temperature), F2-carbonate-bound HM (extracted with 1 M CH 3 COONa buffered to pH 5 at room temperature), F3-Fe/Mn oxide-bound HM (extracted with 0.04 M NH 2 OH·HCl at an initial pH of 2 at 96°C), F4-organic matter-complexed or sulfide-bound HM (extracted with 0.02 M HNO 3 and 30% (v/v) H 2 O 2 at a ratio of 1:1 and an initial pH of 2 at 85°C), and F5-the residual HM (digested with HNO 3 , HF, and HCl mixture). After digestion, HM amounts in solution were determined by atomic absorption spectrometry (AAS 'Hitachi'). Mixtures of uncontaminated soils of different textures (clay and sandy) with SSC in ratios 20:1, 10:1, and 5:1 were used to simulate the land application with SSC. During a period of 7 weeks, changes in Zn, Cu, and Pb content within species were investigated and compared weekly in soil-SSC mixtures with their speciation in pure soil and in the SSC. Results Results in the SSC showed that more HM were found as mobile species compared to the soils, and in sandy soil, more were found in the mobile species than in clay soil. But the HM speciation strongly depended on the metal chemical origin. According to the potential availability, HM ranked in the following order: Zn>Pb>Cu. Zinc generally occurred in the mobile species (F1 and F3), especially in sandy soils amended with SSC, and changes of the Zn speciation were insignificant at the end of the experiment. Pb transfer to insoluble compounds (F5) was evident in the SSC-soil m...

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“…After 24 h, the effluents were collected for analysis, the rocks rinsed with 50 mL of distilled water (DI), and 50 mL of 4M HCl added to each reactor to test for desorption. The selection of HCl as the de-sorbing agent was based on previous studies where it was suggested that HCl would be among the most effective chemicals to release sorbed chromium [16][17][18]. After 24 h, the reactors were emptied, the effluent analyzed, the media rinsed with DI, and 50 mL of fresh solutions with the initial concentrations of chromium were added to each reactor.…”

Section: Laboratory Determination Of Chromium Retention and Regeneratmentioning

confidence: 99%