Trace element biogeochemistry in the soil-water-plant system of a temperate agricultural soil amended with different biochars

Various biochar (BC) types have been investigated as soil amendment; however, information on their effects on trace element (TE) biogeochemistry in the soil-water-plant system is still scarce. In the present study, we determined aqua-regia (AR) and water-extractable TEs of four BC types (woodchips (...

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Veröffentlicht in:Environmental science and pollution research international 2015-03, Vol.22 (6), p.4513-4526
Hauptverfasser: Kloss, Stefanie, Zehetner, Franz, Buecker, Jannis, Oburger, Eva, Wenzel, Walter W., Enders, Akio, Lehmann, Johannes, Soja, Gerhard
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container_end_page 4526
container_issue 6
container_start_page 4513
container_title Environmental science and pollution research international
container_volume 22
creator Kloss, Stefanie
Zehetner, Franz
Buecker, Jannis
Oburger, Eva
Wenzel, Walter W.
Enders, Akio
Lehmann, Johannes
Soja, Gerhard
description Various biochar (BC) types have been investigated as soil amendment; however, information on their effects on trace element (TE) biogeochemistry in the soil-water-plant system is still scarce. In the present study, we determined aqua-regia (AR) and water-extractable TEs of four BC types (woodchips (WC), wheat straw (WS), vineyard pruning (VP), pyrolyzed at 525 °C, of which VP was also pyrolyzed at 400 °C) and studied their effects on TE concentrations in leachates and mustard ( Sinapis alba L.) tissue in a greenhouse pot experiment. We used an acidic, sandy agricultural soil and a BC application rate of 3 % ( w / w ). Our results show that contents and extractability of TEs in the BCs and effectuated changes of TE biogeochemistry in the soil-water-plant system strongly varied among the different BC types. High AR-digestable Cu was found in VP and high B contents in WC. WS had the highest impact on TEs in leachates showing increased concentrations of As, Cd, Mo, and Se, whereas WC application resulted in enhanced leaching of B. All BC types increased Mo and decreased Cu concentrations in the plant tissue; however, they showed diverging effects on Cu in the leachates with decreased concentrations for WC and WS, but increased concentrations for both VPs. Our results demonstrate that BCs may release TEs into the soil-water-plant system. A BC-induced liming effect in acidic soils may lead to decreased plant uptake of cationic TEs, including Pb and Cd, but may enhance the mobility of anionic TEs like Mo and As. We also found that BCs with high salt contents (e.g., straw-based BCs) may lead to increased mobility of both anionic and cationic TEs in the short term.
doi_str_mv 10.1007/s11356-014-3685-y
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In the present study, we determined aqua-regia (AR) and water-extractable TEs of four BC types (woodchips (WC), wheat straw (WS), vineyard pruning (VP), pyrolyzed at 525 °C, of which VP was also pyrolyzed at 400 °C) and studied their effects on TE concentrations in leachates and mustard ( Sinapis alba L.) tissue in a greenhouse pot experiment. We used an acidic, sandy agricultural soil and a BC application rate of 3 % ( w / w ). Our results show that contents and extractability of TEs in the BCs and effectuated changes of TE biogeochemistry in the soil-water-plant system strongly varied among the different BC types. High AR-digestable Cu was found in VP and high B contents in WC. WS had the highest impact on TEs in leachates showing increased concentrations of As, Cd, Mo, and Se, whereas WC application resulted in enhanced leaching of B. All BC types increased Mo and decreased Cu concentrations in the plant tissue; however, they showed diverging effects on Cu in the leachates with decreased concentrations for WC and WS, but increased concentrations for both VPs. Our results demonstrate that BCs may release TEs into the soil-water-plant system. A BC-induced liming effect in acidic soils may lead to decreased plant uptake of cationic TEs, including Pb and Cd, but may enhance the mobility of anionic TEs like Mo and As. We also found that BCs with high salt contents (e.g., straw-based BCs) may lead to increased mobility of both anionic and cationic TEs in the short term.</abstract><cop>Berlin/Heidelberg</cop><pub>Springer Berlin Heidelberg</pub><pmid>25315931</pmid><doi>10.1007/s11356-014-3685-y</doi><tpages>14</tpages></addata></record>
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1614-7499
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source MEDLINE; Springer Nature - Complete Springer Journals
subjects Acidic soils
Adsorption
Agricultural land
Agriculture
Analysis of Variance
Aquatic Pollution
Atmospheric Protection/Air Quality Control/Air Pollution
Binding sites
Bioavailability
Biofilms
Biogeochemistry
Cadmium
Charcoal
Charcoal - chemistry
Earth and Environmental Science
Ecotoxicology
Electric Conductivity
Environment
Environmental Chemistry
Environmental Health
Environmental Pollutants - analysis
Environmental Restoration and Remediation - methods
Farm buildings
Freshwater environments
Hot Temperature
Hydrochloric Acid
Leachates
Leaching
Lead
Life sciences
Mass Spectrometry
Metals, Heavy - analysis
Mobility
Moisture content
Mustard Plant - chemistry
Natural resources
Nitric Acid
Pesticide toxicity
Pesticides
Plant extracts
Plant tissues
Raw materials
Research Article
Sandy soils
Sinapis alba
Soil - chemistry
Soil amendment
Soil sciences
Soil water
Straw
Toxicity
Trace elements
Triticum - chemistry
Triticum aestivum
Vitis - chemistry
Waste Water Technology
Water
Water Management
Water Pollution Control
Wheat straw
Wineries & vineyards
Wood - chemistry
title Trace element biogeochemistry in the soil-water-plant system of a temperate agricultural soil amended with different biochars
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