scholarly journals Synergistic effects of biochar and biostimulant on nutrient and toxic element uptake by pepper in contaminated soils

2021 ◽  
Author(s):  
Rafael Antón‐Herrero ◽  
Liliana Vega‐Jara ◽  
Carlos García‐Delgado ◽  
Begoña Mayans ◽  
Raquel Camacho‐Arévalo ◽  
...  
Keyword(s):  
Contaminated Soils ◽  
Synergistic Effects ◽  
Toxic Element ◽  
Element Uptake

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

2015 ◽  
Vol 17 (5) ◽  
pp. 1279-1290 ◽  
Author(s):  
Stanislava Vondráčková ◽  
Pavel Tlustoš ◽  
Michal Hejcman ◽  
Jiřina Száková
Keyword(s):  
Contaminated Soils ◽  
Toxic Element ◽  
Element Uptake

Synergistic effects of the combination of oxalate and ascorbate on arsenic extraction from contaminated soils

Chemosphere ◽  
2017 ◽  
Vol 168 ◽  
pp. 1439-1446 ◽  
Author(s):  
Jae-Cheol Lee ◽  
Eun Jung Kim ◽  
Kitae Baek
Keyword(s):  
Contaminated Soils ◽  
Synergistic Effects

scholarly journals Biochar Amendment Reduces the Availability of Pb in the Soil and Its Uptake in Lettuce

Toxics ◽  
2021 ◽  
Vol 9 (10) ◽  
pp. 268
Author(s):  
Andrea Vannini ◽  
Elisabetta Bianchi ◽  
Diego Avi ◽  
Nicole Damaggio ◽  
Luigi Di Lella ◽  
...  
Keyword(s):  
Contaminated Soils ◽  
Soil Aggregates ◽  
Exchange Capacity ◽  
Toxic Element ◽  
Lactuca Sativa L ◽  
Bioavailable Fraction ◽  
Ca 50 ◽  
Main Factors ◽  
Co Precipitation ◽  
Biochar Amendment

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.

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

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.

scholarly journals Promotion of growth and metal accumulation of alfalfa by coinoculation with Sinorhizobium and Agrobacterium under copper and zinc stress

PeerJ ◽  
2019 ◽  
Vol 7 ◽  
pp. e6875 ◽  
Author(s):  
Liru Jian ◽  
Xiaoli Bai ◽  
Hui Zhang ◽  
Xiuyong Song ◽  
Zhefei Li
Keyword(s):  
Agrobacterium Tumefaciens ◽  
Plant Growth ◽  
Contaminated Soils ◽  
Sinorhizobium Meliloti ◽  
Plant Biomass ◽  
Antioxidant Activities ◽  
Synergistic Effects ◽  
Medicago Lupulina ◽  
Nitrogenase Activities ◽  
Zn Stress

The Legume-Rhizobium symbiosis has been proposed as a promising technique for the phytoremediation of contaminated soils due to its beneficial activity in symbiotic nitrogen fixation. However, numerous studies have shown that excessive heavy metals reduce the efficiency of symbiotic nodulation with Rhizobium and inhibit plant growth. In this study, we aimed to evaluate the synergistic effects of IAA-producing bacteria and Rhizobium on Medicago lupulina growth under Cu and Zn stress. Pot experiments showed that 400 mg kg−1 Cu2 + and Zn2 + greatly inhibited plant growth, but dual inoculation of Medicago lupulina with Sinorhizobium meliloti CCNWSX0020 and Agrobacterium tumefaciens CCNWGS0286 significantly increased the number of nodules and plant biomass by enhancing antioxidant activities. Under double stress of 400 mg kg−1 Cu2 + and Zn2 +, the nodule number and nitrogenase activities of dual-inoculated plants were 48.5% and 154.4% higher, respectively, than those of plants inoculated with Sinorhizobium meliloti. The root and above-ground portion lengths of the dual-inoculated plants were 32.6% and 14.1% greater, respectively, than those of the control, while the root and above-ground portion dry weights were 34.3% and 32.2% greater, respectively, than those of the control. Compared with S. meliloti and A. tumefaciens single inoculation, coinoculation increased total Cu uptake by 39.1% and 47.5% and increased total Zn uptake by 35.4% and 44.2%, respectively, under double metal stress conditions. Therefore, coinoculation with Sinorhizobium meliloti and Agrobacterium tumefaciens enhances metal phytoextraction by increasing plant growth and antioxidant activities under Cu/Zn stress, which provides a new approach for bioremediation in heavy metal-contaminated soil.

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

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

&lt;p&gt;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 (&lt;2%) or very high (&gt;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.&lt;/p&gt;

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

1993 ◽  
Vol 134 ◽  
pp. 367-380 ◽  
Author(s):  
Zoltán Györi ◽  
András Lányi ◽  
László Ruzsányi ◽  
Béla Kovács ◽  
Jakab Loch
Keyword(s):  
Crop Rotation ◽  
Toxic Element ◽  
Element Uptake
Sign in / Sign up

Export Citation Format

Share Document