scholarly journals The Potential of Clover Green Amendment, Associated with Biochar, Activated Carbon or Ochre, for the Phytoremediation, Using Populus x. canescens, of a Former Mine Technosol

Plants ◽  
2021 ◽  
Vol 10 (7) ◽  
pp. 1374
Author(s):  
Manhattan Lebrun ◽  
Sylvain Bourgerie ◽  
Domenico Morabito
Keyword(s):  
Activated Carbon ◽  
Plant Growth ◽  
Soil Pollution ◽  
Soil Acidity ◽  
Research Interest ◽  
Positive Outcomes ◽  
Health Issues ◽  
Remediation Strategy ◽  
Set Up ◽  
Assisted Phytoremediation

Metal(loid) soil pollution resulting from past and present mine activities is a serious environmental and health issues worldwide. Therefore, the remediation of those polluted areas has been a growing research interest over the last decades, especially the assisted phytoremediation. In this study, a pot experiment was set up, using a former mine technosol, highly polluted by As and Pb, to which biochar, activated carbon, or ochre was applied, alone or in combination to clover green amendment. Following amendment application, Populus x. canescens cuttings were planted. Results showed that all four amendments reduced soil acidity. However only the first three amendments immobilized As and Pb, while the green amendment drastically mobilized those two pollutants and none of the amendments improved plant growth. In conclusion, the association of clover green amendment to biochar, activated carbon, or ochre did not appear as an efficient remediation strategy in this case; although the aging of the amendments and degradation of the green amendment in the soil with time could have positive outcomes.

scholarly journals Utilization of microbial inoculation and compost for revitalization of soils

2009 ◽  
Vol 4 (No. 3) ◽  
pp. 126-130 ◽  
Author(s):  
O. Mikanová ◽  
S. Usťak ◽  
A. Czakó
Keyword(s):  
Plant Growth ◽  
Ammonium Sulphate ◽  
Nitrogenase Activity ◽  
Mineral Fertilizer ◽  
Pot Experiment ◽  
Mineral Fertilizers ◽  
Microbial Inoculation ◽  
Active Population ◽  
Rhizobium Spp ◽  
Set Up

Improving the quality of reclaimed soils requires an active population of microorganisms which can promote plant growth. Increasing the activity of microorganisms can be done by adding nutrients, making agrotechnical soil improvements and by the inoculation of beneficial microorganisms. We investigated the role of fertilizer treatments on plant growth and nitrogen fixation in a pot experiment conducted under green house conditions. Influence of the fertilizer type on numbers of bacteria was also investigated. The seeds were inoculated with the mixture of Azotobacter spp. and Rhizobium spp. The pot experiment was set up with the substrate from the mine spoil (North Bohemia coal basin, the Czech Republic) using Medicago sativa as test plants. The following treatments were used: compost 0, 20, 40, 120, 400, 800 t/ha and mineral fertilizer – ammonium sulphate. The doses of ammonium sulphate were calculated to be equivalent (in nitrogen content) to those doses of compost. Control variants without bacteria inoculation and fertilizers were also included. Inoculation with the mixture of AzotobacterRhizobium spp. significantly increased plant growth and nitrogenase activity. The nitrogenase activity was inhibited by mineral fertilizers in all doses used. The results of the study have proved that compost application stimulated the growth of Azotobacter spp. and Rhizobium spp.

Experimental effect of medium ratio on removal efficiency of nitrate nitrogen in groundwater by zero-valent iron, activated carbon and zeolite

2019 ◽  
Vol 19 (6) ◽  
pp. 1636-1642
Author(s):  
Sizhi Cao ◽  
Peigui Liu ◽  
Mingchao Liu ◽  
Gang Wang ◽  
Zaili Li ◽  
...  
Keyword(s):  
Activated Carbon ◽  
Nitrate Nitrogen ◽  
Nitrogen Concentration ◽  
Nitrate Removal ◽  
Ammonia Nitrogen ◽  
Coarse Sand ◽  
Zero Valent Iron ◽  
Nitrite Nitrogen ◽  
Rich Solution ◽  
Set Up

Abstract In this study, column experiments in the laboratory were set up to examine how the concentrations of nitrate nitrogen, nitrite nitrogen, and ammonia nitrogen changed when a nitrate-rich solution was passed through a medium comprising zero-valent iron, activated carbon, zeolite, and coarse sand. We varied the proportions of the components of the medium to determine how it influenced the nitrate removal and nitrogen fractions. Three different scenarios were used, with: (1) iron, activated carbon, and coarse sand at a ratio of 3:1:6; (2) iron, activated carbon, and zeolite at a ratio of 3:1:6; and (3) iron, activated carbon, and zeolite at a ratio of 3:3:4. The nitrate nitrogen concentration decreased from 25 mg/L to 2 mg/L in the first scenario. Removal was better when zeolite was added to the medium as most of the nitrate nitrogen broke down to ammonia nitrogen, with nitrite nitrogen as an intermediate product. The results of the tests showed that nitrate removal was best when the medium was iron, activated carbon, and zeolite, mixed at a ratio of 3:1:6. This study provides a scientific reference for in situ remediation of nitrate pollution in groundwater.

scholarly journals Mung bean response during immobilization of exchangeable aluminum in acidic soil

2012 ◽  
Vol 10 (2) ◽  
pp. 300-304 ◽  
Author(s):  
Monika Skwira ◽  
Agata Jakóbik-Kolon ◽  
Jerzy Ciba
Keyword(s):  
Plant Growth ◽  
Soil Acidity ◽  
Essential Elements ◽  
Aluminum Concentration ◽  
Soil Incubation ◽  
Short Term ◽  
Exchangeable Al ◽  
Exchangeable Aluminum ◽  
General Improvement ◽  
Stalk Length

AbstractA soil incubation and shot-term plant growth experiment was conducted to study the effect of ferruginous mineral application on exchangeable Al immobilization. The mineral containing mainly siderite was mixed at various rates with A-horizon soil and incubated at 80% humidity for 45 days. Following the incubation, a short-term plant growth test was carried out using mung beans. The ferruginous mineral application into tested soil resulted in a reduction of the exchangeable aluminum concentration and soil acidity. An increase in root growth and stalk length, as well as a general improvement of plant condition was observed in the case of ferruginous mineral application. This observation was confirmed by chemical analysis of roots and stalks. The greatest amount of essential elements: calcium and magnesium and the lowest amount of aluminum were determined in green part of mung beans sown in the soil with addition of 2% ferruginous mineral.

scholarly journals Inference of allelopathy is complicated by effects of activated carbon on plant growth

2008 ◽  
Vol 178 (2) ◽  
pp. 412-423 ◽  
Author(s):  
Jennifer A. Lau ◽  
Kenneth P. Puliafico ◽  
Joseph A. Kopshever ◽  
Heidi Steltzer ◽  
Edward P. Jarvis ◽  
...  
Keyword(s):  
Activated Carbon ◽  
Plant Growth

scholarly journals Effect of Selected Plant Growth Regulators on Yield and Stem Height of Spring Wheat in Ontario

2017 ◽  
Vol 9 (12) ◽  
pp. 30 ◽  
Author(s):  
Yuxue Zhang ◽  
Shengnan Su ◽  
Mirko Tabori ◽  
Junjie Yu ◽  
Denise Chabot ◽  
...  
Keyword(s):  
Plant Growth ◽  
Plant Growth Regulators ◽  
Growth Regulators ◽  
Spring Wheat ◽  
Active Ingredient ◽  
Growth Yield ◽  
Limiting Factor ◽  
Stem Height ◽  
Stem Strength ◽  
Set Up

Lodging is an important limiting factor in wheat because it affects growth, yield and grain quality. Plant growth regulators (PGRs) are often used to restrain elongation of internodes, improve lodging traits, and protect yield potentials. An experiment was set up in the greenhouse at the Ottawa Research and Development Centre (ORDC) to study the effect of the selected PGRs (Manipulator, the active ingredient of which is chlormequat; and Palisade, the active ingredient of which is trinexapac-ethyl) on yield, stem height and morphological traits in six spring wheat cultivars (AC Carberry, AAC Scotia, Hoffman, Fuzion, FL62R1, and AW725). Both PGRs reduced plant height and caused a 6% to 48% reduction in the length of the second basal internode. The mixture of the two PGRs had a synergistic affect and made the stem shorter. The application of PGRs significantly reduced lodging, increased stem diameter, thickness, filling degree, and stem strength, and increased leaf relative chlorophyll content. However, application of PGRs significantly reduced grain yield, and the combination of the two PGRs (Manipulator and Palisade) had a synergistic effect and lowered the yield. In general, the effect of Palisade was more evident than that of Manipulator.

Sphingomonads in Microbe-Assisted Phytoremediation: Tackling Soil Pollution

2017 ◽  
Vol 35 (9) ◽  
pp. 883-899 ◽  
Author(s):  
Michael Gatheru Waigi ◽  
Kai Sun ◽  
Yanzheng Gao
Keyword(s):  
Soil Pollution ◽  
Assisted Phytoremediation

Soil Acidity and Plant Growth

Soil Science ◽  
1990 ◽  
Vol 150 (6) ◽  
pp. 903 ◽  
Author(s):  
A. D. Robson ◽  
C. D. Foy
Keyword(s):  
Plant Growth ◽  
Soil Acidity

scholarly journals Isolation, Biochemical and Genomic Characterization of Glyphosate Tolerant Bacteria to Perform Microbe-Assisted Phytoremediation

2021 ◽  
Vol 11 ◽  
Author(s):  
Francisco Massot ◽  
Panagiotis Gkorezis ◽  
Jonathan Van Hamme ◽  
Damian Marino ◽  
Bojana Spirovic Trifunovic ◽  
...  
Keyword(s):  
Plant Growth ◽  
Plant Growth Promotion ◽  
Large Scale ◽  
Agricultural Soils ◽  
Growth Promotion ◽  
Sole Source ◽  
Bacterial Strains ◽  
Positive Effects ◽  
Assisted Phytoremediation

The large-scale use of the herbicide glyphosate leads to growing ecotoxicological and human health concerns. Microbe-assisted phytoremediation arises as a good option to remove, contain, or degrade glyphosate from soils and waterbodies, and thus avoid further spreading to non-target areas. To achieve this, availability of plant-colonizing, glyphosate-tolerant and -degrading strains is required and at the same time, it must be linked to plant-microorganism interaction studies focusing on a substantive ability to colonize the roots and degrade or transform the herbicide. In this work, we isolated bacteria from a chronically glyphosate-exposed site in Argentina, evaluated their glyphosate tolerance using the minimum inhibitory concentration assay, their in vitro degradation potential, their plant growth-promotion traits, and performed whole genome sequencing to gain insight into the application of a phytoremediation strategy to remediate glyphosate contaminated agronomic soils. Twenty-four soil and root-associated bacterial strains were isolated. Sixteen could grow using glyphosate as the sole source of phosphorous. As shown in MIC assay, some strains tolerated up to 10000 mg kg–1 of glyphosate. Most of them also demonstrated a diverse spectrum of in vitro plant growth-promotion traits, confirmed in their genome sequences. Two representative isolates were studied for their root colonization. An isolate of Ochrobactrum haematophilum exhibited different colonization patterns in the rhizoplane compared to an isolate of Rhizobium sp. Both strains were able to metabolize almost 50% of the original glyphosate concentration of 50 mg l–1 in 9 days. In a microcosms experiment with Lotus corniculatus L, O. haematophilum performed better than Rhizobium, with 97% of glyphosate transformed after 20 days. The results suggest that L. corniculatus in combination with to O. haematophilum can be adopted for phytoremediation of glyphosate on agricultural soils. An effective strategy is presented of linking the experimental data from the isolation of tolerant bacteria with performing plant-bacteria interaction tests to demonstrate positive effects on the removal of glyphosate from soils.

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