Regulation of macro, micro, and toxic element uptake by Salix × smithiana using liming of heavily contaminated soils

The aim of this study was to investigate the ability of biochar amendment to reduce the availability of Pb in the soil and its uptake in lettuce (Lactuca sativa L. var. adela). Seedlings of lettuce were cultivated in Pb-contaminated soils, both with and without 5% biochar (w/w), as well as in a simplified soilless system (hydroponics) at the ecologically relevant Pb concentration of 100 µM, both with and without 1% biochar. Soils amended with biochar resulted in a ca. 50% reduction of the extractable (bioavailable) fraction of Pb, limiting the accumulation of this toxic element in the leaves of lettuce by ca. 50%. A similar behavior was observed for lettuce plants grown hydroponically, even with a much higher reduction of Pb uptake (ca. 80%). Increased cation exchange capacity and pH were likely the main factors limiting the bioavailability of Pb in the soil. Complexation with functional groups and precipitation/co-precipitation both on the biochar surface and in soil aggregates were likely the main mechanisms immobilizing this element.

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Evaluation of Cynara cardunculus L. and municipal solid waste compost for aided phytoremediation of multi potentially toxic element–contaminated soils

Environmental Science and Pollution Research ◽

10.1007/s11356-020-10687-2 ◽

2020 ◽

Vol 28 (3) ◽

pp. 3253-3265

Author(s):

Matteo Garau ◽

Paola Castaldi ◽

Giacomo Patteri ◽

Pier Paolo Roggero ◽

Giovanni Garau

Keyword(s):

Municipal Solid Waste ◽

Solid Waste ◽

Contaminated Soils ◽

Soil Microbial Communities ◽

Toxic Element ◽

Cynara Cardunculus ◽

Amended Soils ◽

Municipal Solid Waste Compost ◽

Potentially Toxic Element ◽

Compost Amendment

AbstractThe suitability for aided phytoremediation of Cynara cardunculus L. var. altilis and municipal solid waste compost (MSWC) applied at 2% and 4 % rates was evaluated in a multi potentially toxic element (PTE)-contaminated mining soil (Pb ~ 15,383 mg kg−1, Zn ~ 4076 mg kg−1, As ~ 49 mg kg−1, Cd ~ 67 mg kg−1, Cu ~ 181 mg kg−1, and Sb ~ 109 mg kg−1). The growth of C. cardunculus significantly increased with compost amendment and followed the order: MSWC-4% > MSWC-2% > Control. PTE concentrations in the roots of plants grown on amended soils decreased compared with control plants (i.e., less than ~ 82, 94, and 88% for Pb, Zn, and Cd respectively). PTE translocation from roots to shoots depended on both PTE and amendment rate but values were generally low (i.e., < 1). However, PTE mineralomasses were always higher for plants grown on MSWC-amended soils because of their higher biomass production, which favored an overall PTE bioaccumulation in roots and shoots. After plant growth, labile As and Sb increased in amended soils, while labile Pb, Zn, Cu, and Cd significantly decreased. Likewise, dehydrogenase and urease activities increased significantly in planted soils amended with MSWC. Also, the potential metabolic activity and the catabolic versatility of soil microbial communities significantly increased in planted soils amended with MSWC. Overall, our results indicate that C. cardunculus and MSWC can be effective resources for the aided phytoremediation of multi PTE-contaminated soils.

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Effects of arbuscular mycorrhizal fungi on the growth and toxic element uptake of Phragmites australis (Cav.) Trin. ex Steud under zinc/cadmium stress

Ecotoxicology and Environmental Safety ◽

10.1016/j.ecoenv.2021.112023 ◽

2021 ◽

Vol 213 ◽

pp. 112023

Author(s):

Yongqiang You ◽

Li Wang ◽

Chang Ju ◽

Gen Wang ◽

Fang Ma ◽

...

Keyword(s):

Arbuscular Mycorrhizal Fungi ◽

Phragmites Australis ◽

Mycorrhizal Fungi ◽

Arbuscular Mycorrhizal ◽

Cadmium Stress ◽

Toxic Element ◽

Element Uptake ◽

Zinc Cadmium

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Earthworms accelerate the biogeochemical cycling of potentially toxic elements: Results of a meta-analysis

10.5194/egusphere-egu2020-1873 ◽

2020 ◽

Author(s):

Tom Sizmur ◽

Justin Richardson

Keyword(s):

Contaminated Soils ◽

Toxic Elements ◽

Meta Analysis ◽

Organic Matter Content ◽

Potentially Toxic Elements ◽

Toxic Element ◽

Micronutrient Deficiencies ◽

Earthworm Casts ◽

Potentially Toxic Element ◽

The Impact

<p>Earthworms are ecosystem engineers, capable of modifying the soil environment they inhabit. Recent evidence indicates that they increase the mobility and availability of potentially toxic elements in soils, but the systematic synthesis of the evidence required to understand mechanisms and identify soils most susceptible to earthworm-induced potentially toxic element mobilisation is lacking. We undertook a meta-analysis of 43 peer reviewed journal articles, comprising 1185 pairwise comparisons to quantify the impact of earthworms on potentially toxic element mobility in bulk earthworm-inhabited soil and earthworm casts and on plant uptake and concentration. We find that earthworms mobilise potentially toxic elements primarily due to the passage of soil through the earthworm gut and that this results in an increase in the concentration and uptake by plants. Earthworms mobilise potentially toxic elements in uncontaminated soils to a greater extent than contaminated soils. Soils with either very low (<2%) or very high (>10%) soil organic matter content are most susceptible to earthworm-induced potentially toxic element mobilisation. These findings have important implications for exotic earthworms burdening plants with toxic metals, but also offer a promising phenomenon that, if harnessed, may help to alleviate micronutrient deficiencies in degraded soils.</p>

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Effects of fertilization, irrigation and crop rotation on the transition and toxic element uptake of corn

The Science of The Total Environment ◽

10.1016/s0048-9697(05)80037-3 ◽

1993 ◽

Vol 134 ◽

pp. 367-380 ◽

Cited By ~ 1

Author(s):

Zoltán Györi ◽

András Lányi ◽

László Ruzsányi ◽

Béla Kovács ◽

Jakab Loch

Keyword(s):

Crop Rotation ◽

Toxic Element ◽

Element Uptake

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REDUCTION OF TOXIC ELEMENT MOBILITY IN MINING SOIL BY ZEOLITIC AMENDMENTS

Bulletin of the Geological Society of Greece ◽

10.12681/bgsg.14265 ◽

2017 ◽

Vol 50 (4) ◽

pp. 2127 ◽

Cited By ~ 1

Author(s):

S. Giannatou ◽

Ch. Vasilatos ◽

I. Mitsis ◽

N. Koukouzas ◽

G. Itskos ◽

...

Keyword(s):

Heavy Metals ◽

Fly Ash ◽

Contaminated Soils ◽

Low Cost ◽

Trace Element Content ◽

Mining Area ◽

Toxic Element ◽

Synthetic Zeolite ◽

Element Content ◽

Lignite Fly Ash

The aim of this study is to examine the effectiveness of natural and synthetic zeolitic materials as potential amendments for the rehabilitation of mine degraded areas. Two types of natural zeolite tuffs, clinoptilolite- and mordenite rich originating from Samos Island, Greece, were used as low cost modifiers. In addition, the synthetic zeolite Na-P1, produced from lignite fly ash of the Meliti Lignite fired Power Station (Florina, Greece), was used. Fly ash was converted into synthetic zeolite via a low temperature alkaline hydrothermal treatment. In order to evaluate the aquatic solubility and potential bioavailability of heavy metals in contaminated soils of the mining area of Lavrion, specific soil amendments were used in leaching experiments. The Na-P1zeolite proved to be the most effective among the tested amendments for in situ de-contamination of mining soils. Comparing the two natural zeolites used, the mordenite-rich tuff exhibited better results than the clinoptilolite-rich, for the reduction of the potential bioavailability of almost all the studied heavy metals. Despite the high trace element content of the specific soils, it was observed that the Glaucium flavum, a plant that grows in the contaminated soils of Lavrion, does not accumulate high concentrations of metals; therefore the high toxic element content of soils does not always influence the physiology of the plants.

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Effect of chelants on the lead and copper uptake of maize from contaminated soils

Agrokémia és Talajtan ◽

10.1556/agrokem.62.2013.2.14 ◽

2013 ◽

Vol 62 (2) ◽

pp. 373-386 ◽

Cited By ~ 1

Author(s):

György Czira ◽

László Simon ◽

György Vincze ◽

József Koncz ◽

Gyula Lakatos

Keyword(s):

Contaminated Soils ◽

Copper Uptake

Magyarországon a robbanóanyaggal és lőszerszármazékokkal szennyezett területek kármentesítése környezetvédelmi és nemzetgazdasági érdek. Egy hazai lőtérről, illetve lőszer-megsemmisítő telepről vett talajban 900 mg·kg−1 ólom- és 133 mg·kg−1 rézszennyeződést mértünk. A fitoextrakció célja, hogy a növényi szervekbe helyezzük át a nehézfémeket, lecsökkentve ezzel a mobilis, toxikus elemkészletet a szennyezett talajokban. Megvizsgáltuk, hogy egy lőszerszármazékokkal szennyezett talajba, illetve ólommal mesterségesen elszennyezett talajba kijuttatott kelátképzőszerekkel (EDTA, EGTA, citromsav) indukálható-e, megnövelhető-e a növényi szervek Pb- és Cu-akkumulációja?Tenyészedény-kísérletünkben kukoricát neveltünk a fenti ólommal és rézzel elszennyezett lőtéri talajon, illetve a közelben gyűjtött szennyezetlen talajt mesterségesen szennyeztük el 100 mg·kg-1 ólommal. Míg a kontroll (kelátképzővel nem kezelt) szennyezett talajon fejlődő kukorica gyökerében 554 μg·g−1 ólom volt mérhető, addig az EDTA hatására a gyökerekben 4611 μg·g−1-ra (több mint nyolcszorosára), a hajtásokban pedig 158-ról 302 μg·g−1-ra (91%-kal) nőtt az ólomkoncentráció. Mindkét változás statisztikailag szignifikánsnak bizonyult. Az EGTA a Cufelvételt serkentette; a kontrollkultúrák gyökerében 516 μg·g−1, a kezelt kultúrákban viszont 1063 μg·g−1 értéket mértünk (ez kétszeres szignifikáns növekmény). A hajtásokban 69%-kal, 29,9-ról 50,7 μg·g−1-ra emelkedett a réztartalom, ez azonban nem bizonyult statisztikailag szignifikánsnak. A citromsav az ólom hajtásokba történő áthelyeződését nem indukálta, rézfelvétel-serkentő hatása csak a gyökerekben volt szignifikáns.Tenyészedény-kísérleteink alapján kijelenthető, hogy elsősorban az EDTA, illetve részben az EGTA a talajba kijuttatva mobilisabbá, könnyebben felvehetővé teszi az ólmot és a rezet, elősegítve ezzel e két toxikus elem növényekben történő akkumulációját. Szabadföldi körülmények között is feltételezhető, hogy a növények betakarításával a toxikus elemek egy része eltávolítható a szennyezett talajból.

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