Evaluating vanadium bioavailability to cabbage in rural soils using geochemical and micro-spectroscopic techniques

Cho-Yin Wu; Maki Asano; Yohey Hashimoto; Jörg Rinklebe; Sabry M Shaheen; Shan-Li Wang; Zeng-Yei Hseu

doi:10.1016/j.envpol.2019.113699

Evaluating vanadium bioavailability to cabbage in rural soils using geochemical and micro-spectroscopic techniques

Environ Pollut. 2020 Mar:258:113699. doi: 10.1016/j.envpol.2019.113699. Epub 2019 Dec 2.

Authors

Cho-Yin Wu¹, Maki Asano², Yohey Hashimoto³, Jörg Rinklebe⁴, Sabry M Shaheen⁵, Shan-Li Wang⁶, Zeng-Yei Hseu⁷

Affiliations

¹ Department of Agricultural Chemistry, National Taiwan University, Taipei 10617, Taiwan.
² School of Life and Environmental Sciences, University of Tsukuba, Tsukuba 3058572, Japan.
³ Department of Bio-Applications and Systems Engineering, Tokyo University of Agriculture and Technology, Tokyo 1848588, Japan.
⁴ University of Wuppertal, School of Architecture and Civil Engineering, Institute of Foundation Engineering, Water- and Waste-Management, Laboratory of Soil- and Groundwater-Management, Pauluskirchstraße 7, 42285 Wuppertal, Germany; Department of Environment, Energy and Geoinformatics, Sejong University, 98 Gunja-Dong, Seoul, Republic of Korea. Electronic address: rinklebe@uni-wuppertal.de.
⁵ University of Wuppertal, School of Architecture and Civil Engineering, Institute of Foundation Engineering, Water- and Waste-Management, Laboratory of Soil- and Groundwater-Management, Pauluskirchstraße 7, 42285 Wuppertal, Germany; King Abdulaziz University, Faculty of Meteorology, Environment, and Arid Land Agriculture, Department of Arid Land Agriculture, 21589 Jeddah, Saudi Arabia; University of Kafrelsheikh, Faculty of Agriculture, Department of Soil and Water Sciences, 33 516 Kafr El-Sheikh, Egypt.
⁶ Department of Agricultural Chemistry, National Taiwan University, Taipei 10617, Taiwan. Electronic address: shaheen@uni-wuppertal.de.
⁷ Department of Agricultural Chemistry, National Taiwan University, Taipei 10617, Taiwan. Electronic address: zyhseu@ntu.edu.tw.

PMID: 31911008
DOI: 10.1016/j.envpol.2019.113699

Abstract

Assessing the vanadium (V) fractionation and speciation to predict its bioavailability using a combined approach of geochemical extractions and micro-spectroscopic techniques is still not well studied. Therefore, we aimed to determine the bioavailability of V in rural soils using single extractants, sequential extraction procedure, and the X-ray absorption near edge structure (XANES) spectroscopy. We collected and characterized ninety four samples originated from horizons of seventeen soil profiles in Taiwan. We determined the total content of V and its geochemical fractions using the BCR sequential extraction procedure to predict its potential mobility. We also assessed the bioavailability of V in the soils using four availability indices i.e., CaCl₂, HCl, ethylenediaminetetraacetic acid (EDTA), and NaHCO₃ and related them to its uptake by Chinese cabbage (Brassica chinensis L.). Additionally, we determined the V speciation by vanadium K-edge XANES spectra. Moreover, we studied the elemental compositions of the soils using Electron Probe Micro Analysis (EPMA). Vanadium was mainly distributed in the residual fraction (81-98% of total V). Among the potential mobile fractions, V was mainly associated with Fe oxides, as identified by the BCR sequential extraction and EMPA. The XANES analysis indicated that V mainly existed in the soils as V(IV) and V(V). The EDTA and NaHCO₃ extracted more V than CaCl₂ and HCl, and both, particularly NaHCO₃ were positively and significantly correlated with the total soil content and plant shoot concentrations of V; therefore NaHCO₃ might be recommended as a bioavailability index for soil V. We hypothesize that the NaHCO₃ may extract vanadate from soil surfaces and also vanadate transformed from vanadyl at alkaline pH during the extraction. The NaHCO₃-extracted V can be predicted by a function of soil total V, CEC, and pH. Our results should be verified using different soils and plants in the future.

Keywords: Chinese cabbage; Sequential extraction; Soil contamination; Vanadium bioavailability; XANES spectroscopy.

MeSH terms

Biological Availability
Brassica / metabolism*
Soil Pollutants / metabolism*
Taiwan
Vanadium / metabolism*

Substances

Soil Pollutants
Vanadium