Immobilization of aqueous cadmium by addition of phosphates

Matusik, Jakub; Bajda, Tomasz; Manecki, Maciej

doi:10.1016/j.jhazmat.2007.08.010

Cited by 98 publications

(43 citation statements)

References 37 publications

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“…Da Rocha et al (2002 suggested that Cd immobilization could be associated with the ion exchange and complexation mechanisms. Surface adsorption or fixation mechanisms involving the formation of Cd-phosphate on the surface of the amendment were also reported in several studies (Marchat et al 2007;Matusik et al 2008;Corami et al 2008). However, Ma et al (1994) reported Cd-phosphate minerals were not detected via X-ray diffraction (XRD) but Cd-Ca-phosphate might have been formed in the experiment.…”

Section: Changes In Available Heavy Metals In the Soilmentioning

confidence: 66%

Evaluation of different amendments and foliar fertilizer for immobilization of heavy metals in contaminated soils

et al. 2017

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Purpose The aim of this study was to evaluate the effectiveness of soil amendments and foliar fertilizer on Cd and Pb immobilization in contaminated soils. Materials and methods A field experiment was conducted in contaminated soils, wherein four amendments (sepiolite (SE), single superphosphate (SSP), triple super phosphate (TSP), calcium magnesium phosphate (CMP)) in combination with one foliar fertilizer (ZnSO 4 ) were investigated to reduce Cd and Pb bioavailability in calcareous soils. Total Cd and Pb concentrations in wheat, soil, and amendments were determined using inductively coupled plasma mass spectrometry. Available concentrations of Cd and Pb in soils were extracted using diethylenetriamine pentaacetic acid. Results and discussion The results indicated that application of these amendments and foliar fertilizer significantly decreased Cd availability in soils and Cd accumulation in wheat (P < 0.05); however, the soil amendments plus Zn fertilizer did not significantly decrease Cd and Pb concentrations in wheat. Compared with the control, application of soil amendments effectively reduced the available Cd and Pb in soils by 25.69~54.13% and 9.86~42.14%, respectively. Accordingly, the reduction of Cd and Pb concentrations in wheat grain by the soil amendments was 20.68~41.38% and 23.68~55.26%, respectively.Conclusions Among all the treatments, the addition of SE + SSP and SE + CMP exhibited the most efficiency in reducing Cd and Pb availability, respectively, in the soil.

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Section: Changes In Available Heavy Metals In the Soilmentioning

confidence: 66%

Evaluation of different amendments and foliar fertilizer for immobilization of heavy metals in contaminated soils

et al. 2017

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“…[3][4][5] In addition, soil pH, the solubility of immobilizing agents, dissolved organic carbon (DOC), and other competitive metal ions in soils are major factors that can affect these mechanisms. 6,35,36 In this study, SS was better than DKP for immobilizing water-soluble Cd in soil. Variations in pH could have played a signicant role in enhancing the immobilizing efficiency of SS.…”

Section: -30mentioning

confidence: 67%

Assessing the effect of phosphate and silicate on Cd bioavailability in soil using an Escherichia coli cadAp::luc-based whole-cell sensor

Hou

et al. 2014

Environ. Sci.: Processes Impacts

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An Escherichia coli cadAp::luc-based whole-cell sensor was constructed to measure cadmium (Cd) bioavailability and assess the immobilizing efficiency of phosphate and silicate on Cd. In previous induction experiments, a linear response (R 2 ¼ 0.97, P < 0.01) from 0.1 to 5 mmol L À1 of Cd was detected by this sensor after a 2 h incubation. , respectively. In other words, SS had 25.68%, 19.5%, and 9.54% better immobilizing efficiency, respectively, compared with DKP. All the results supported SS was more efficient than DKP at immobilizing Cd in soil, and higher soil pH and higher solubility of the immobilizing agents may have been the major factor affecting immobilizing efficiency. In addition, the total and bioavailable Cd in soilwater extracts was only 16.13-35.41% of the sensor contact assay-determined Cd (BSWS), which indicated that the whole-cell sensor-based contact assay was more practical in assessing the risk of Cd in soil after immobilization since it would not overrate the immobilizing capacity of the agents. Environmental impactEnvironmental contamination by cadmium (Cd) is a world-wide problem. Dipotassium phosphate (DKP, K 2 HPO 4 ) and sodium silicate (SS, Na 2 SiO 3 $9H 2 O) are effective and traditional immobilizing agents for metals in soil due to their effectiveness to reduce the mobility of metals. However, a direct comparison of their immobilizing efficiencies for Cd in soil has not been carried out before, more importantly, the mobility of metals did not represent their actual bioavailability and toxicity. Therefore an Escherichia coli-based whole cell sensor for detecting the bioavailability of Cd was constructed, and the immobilizing efficiency of DKP and SS for Cd in soil was then compared with this whole-cell sensor.

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“…The initial concentration of Cd(II) = 4.80 mM dictated by previous experiments (Matusik et al 2008) was chosen for all experiments. The initial concentrations of Cd(II) and PO 4 ions, 4.80 mM and 3.52 mM respectively, were constant through all experiments and resulted from the stoichiometry of expected product -cadmium phosphate Cd 3 (PO 4 ) 2 .…”

Section: Batch Experimentsmentioning

confidence: 99%

“…Equilibria in water and soil solutions are mainly controlled by sorption/desorption and crystallization/dissolution processes. Therefore a promising way of eliminating mobile metals from soils is to convert them into stable metal phosphates by addition of soluble or insoluble phosphates (Levi Minzi & Petruzzelli 1984, Ma et al 1993, Ruby et al 1994, Xu & Schwartz 1994, Ma et al 1995, Cotter-Howells 1996, Lambert et al 1997, Zhang et al 1997, Fedoroff et al 1999, Shashkova et al 1999, Manecki et al 2000b, McGowen et al 2001, McGrellis et al 2001, Lusvardi et al 2002, Basta McGowen 2004, Lundager et al 2004, Raicevic et al 2005, Manecki et al 2006, Marchat et al 2007, Matusik et al 2008. This method, which is well known in the literature as in situ phosphate formation has convincing advantages.…”

Section: Introductionmentioning

confidence: 99%

Aqueous cadmium removal by hydroxylapatite and fluoroapatite

Matusik¹,

Bajda²,

Manecki³

2012

geol

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Reducing the bioavailability of toxic heavy metals in groundwaters and urban soils by phosphate addition is an effective technique described in the literature. It is based on the reaction between metal ions and phosphates and results in the precipitation of metal substituted phosphate phases. The formed phosphates are highly insoluble and thermodynamically stable over almost entire pH and Eh range. In the presented study the efficiency and mechanism of cadmium uptake by synthetic hydroxylapatite and natural fluoroapatite was examined within the pH range of 3 7 for different reaction times (2 1440 hours). The solids after reactions were characterized by XRD and SEM-EDS. Percentage reduction of cadmium concentration in the experiments with fluoroapatite and hydroxylapatite, regardless of pH, did not exceed 17% and 25%, respectively. Cadmium uptake from the solution mainly resulted from the formation of cadmium phosphates and/or Ca-Cd phosphate solid solutions on the apatites surface. The release rate of phosphate ions by hydroxylapatite was relatively high. This promoted crystallization of a large number of small crystals. In turn dissolution of fluoroapatite was slower and thus the formation of large crystals was observed. There was no clear evidence for cadmium-calcium ion-exchange mechanism.

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Immobilization of aqueous cadmium by addition of phosphates

Cited by 98 publications

References 37 publications

Evaluation of different amendments and foliar fertilizer for immobilization of heavy metals in contaminated soils

Evaluation of different amendments and foliar fertilizer for immobilization of heavy metals in contaminated soils

Assessing the effect of phosphate and silicate on Cd bioavailability in soil using an Escherichia coli cadAp::luc-based whole-cell sensor

Aqueous cadmium removal by hydroxylapatite and fluoroapatite

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