Speciation and phytoavailability of cadmium in selected surface soils of South Australia
Abstract
A modified sequential extraction scheme was developed for partitioning the particulate-bound cadmium (Cd) into 9 fractions: exchangeable, carbonate-bound/specifically adsorbed, metal–fulvic acid-complex-bound, metal–humic acid-complex-bound, easily reducible metal oxide-bound, organic-bound, amorphous mineral colloid-bound, crystalline Fe oxide-bound, and detrital (bound to mineral lattices). Results on 11 surface soils showed that Cd in these soils was predominantly present in detrital form, bound to the mineral lattices, accounting for 15.8–61.9%, with an average of 33.4%, of the total Cd in the soils. The average relative abundance of Cd bound to the different particulate forms in the soils is in the order: detrital (0.077 mg/kg) > specifically adsorbed/carbonate-bound (0.066 mg/kg) > organic-bound (0.033 mg/kg) > metal–fulvic acid-complex-bound (0.031 mg/kg) > easily reducible metal oxide-bound (0.019 mg/kg) > exchangeable (0.013 mg/kg) > metal–humic acid-complex-bound (0.011 mg/kg) > crystalline Fe oxide-bound (0.001 mg/kg) =amorphous mineral colloid-bound (0.001 mg/kg). The phytoavailable Cd content was determined as Cd concentration in the shoot and leaf of durum wheat plants grown on the soils in a greenhouse study. Statistical treatment of the data showed that the exchangeable Cd ( r = 0.735, P = 0.01) and the metal–fulvic acid-complex-bound Cd ( r = 0.824, P = 0.002) correlated significantly with the plant-available Cd, compared with other species. The exchangeable…
Integrity signals
Registry
Cites
Statistics
Claims the paper makes
Claims other papers make about this one
Each is checked against this paper’s own text: does it say what the citing paper says it does?
The modified sequential extraction scheme consisting of 8 steps of extractions subdivides the metal-organic complex-bound Cd into metal-fulvate complex-bound and metal-humate complex-bound Cd.
“These authors have shown that the modified sequential extraction scheme consisting of 8 steps of extractions subdivides the metal-organic complexbound Cd into metal-fulvate complexbound and metal-humate complex-bound Cd.”
From MOBILITY AND BIOAVAILABILITY OF HEAVY METALS AND METALLOIDS IN SOIL ENVIRONMENTS (2010) · cites this paper as Krishnamurti and Naidu, 2000
The extraction scheme could be used for identifying the specific operationally defined 'species' contributing to the bioavailability of the trace element.
“Their data indicate that the extraction scheme could be used for identifying the specific -operationally defined 'species' contributing to the bioavailability of the trace element.”
From MOBILITY AND BIOAVAILABILITY OF HEAVY METALS AND METALLOIDS IN SOIL ENVIRONMENTS (2010) · cites this paper as Krishnamurti and Naidu, 2000
In a few typical surface soils in South Australia, Cu, Zn and Cd were dominantly associated with the alumino-silicate mineral lattices (residual fraction), on average 40% of Cu, 52.4% of Zn and 33.4% of Cd.
“The trace elements in these soils were dominantly (on an average 40% of Cu, 52.4% of Zn and 33.4% of Cd) associated with the alumino-silicate mineral lattices, identified as residual fraction in the scheme”
From MOBILITY AND BIOAVAILABILITY OF HEAVY METALS AND METALLOIDS IN SOIL ENVIRONMENTS (2010) · cites this paper as Krishnamurti and Naidu, 2000
Cites
Lion, L. W., Altmann, R. S., & Leckie, J. O. (1982) · Environmental Science & Technology · doi:10.1021/es00104a007 · Cited by 308 · see citing works
Flagged first, then by citations
Cited by
Sorted by citations
MOBILITY AND BIOAVAILABILITY OF HEAVY METALS AND METALLOIDS IN SOIL ENVIRONMENTS
Violante, A., Cozzolino, V, Perelomov, L., Caporale, A. G., & Pigna, M. (2010) · Journal of Soil Science and Plant Nutrition · doi:10.4067/s0718-95162010000100005 · Cited by 957 · see citing works
“10 (3): 268 - 292 (2010) Later, Krishnamurti and Naidu (2000) modified the sequential extraction scheme developed by Krishnamurti et al. (1995a) sub-fractionating the trace element bound to metal-organic complexes as extracted by 0.1 M sodium pyrophosphate (Table 3).”
MethodInfluentialChemical Processes Affecting the Mobility of Heavy Metals and Metalloids in Soil Environments
Caporale, A. G., & Violante, A. (2016) · Current Pollution Reports · doi:10.1007/s40726-015-0024-y · Cited by 369 · see citing works
- Authors
- Krishnamurti, G. S. R., & Naidu, R.
- ORCID
- Naidu, R.
- Venue
- Soil Research
- Publisher
- CSIRO Publishing
- Published
- 2000-08-30
- Volume
- 38
- Issue
- 5
- Pages
- 991-1004
- ISSN
- 0004-9573 (ISSN-L)
- 1838-675X
- 1838-6768
- OpenAlex
- W2141006598
- Cited by
- 73
- References
- 1
- Citations by year
- 2026: 1 · 2024: 3 · 2023: 2 · 2022: 1 · 2021: 2 · 2020: 3 · 2019: 3 · 2018: 1 · 2017: 4 · 2016: 2 · 2015: 5 · 2014: 5 · 2013: 3 · 2012: 4
- FWCI
- 2.29
- Type
- journal article
- Language
- en
- Open access
- closed
- Locations
- Soil Research (publishedVersion)
- Funders
- Grains Research and Development Corporation
- Topics
- Physical Sciences › Environmental Science › Pollution › Heavy metals in environment
- Life Sciences › Agricultural and Biological Sciences › Plant Science › Plant Micronutrient Interactions and Effects
- Physical Sciences › Environmental Science › Water Science and Technology › Environmental and Analytical Chemistry Studies
- Keywords
- cadmium, speciation, phytoavailability, sequential extraction, durum wheat, exchangeable cadmium, soil contamination, South Australia
About these checks
Registry, retraction, Cites and statistics results are computed, not judged, with one exception: a printed reference that no index lists is read once by a model before it counts as a citation error. Claims are extracted by a model and kept only when their quote appears verbatim in the text; each cited source is then checked, with a model’s help, for whether it says what the claim relies on. Those verdicts can be wrong — read the claim’s quote and the cited source before relying on one.
Statistics and arithmetic are recomputed, not judged.
Confidence bands are shown only for fields calibrated on our annotated test set. None is calibrated yet, so no band is shown.
What counts as a claim ›How we measure confidence ›How we check this ›
Are you an author, or do you see a problem with this page? Request a review
