Biochar, Bioremediation and Bioenergy

A special issue of Plants (ISSN 2223-7747). This special issue belongs to the section "Plant–Soil Interactions".

Deadline for manuscript submissions: closed (20 May 2024) | Viewed by 2670

Special Issue Editors


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Guest Editor
Department of Environmental Science, Gitam School of Studies, GITAM University, Visakhapatnam 530045, India
Interests: phytoremediation of metal-polluted sites; sustainable waste management; heavy metal monitoring and assessment; plant–metal–microbe interaction; solid and hazardous waste management; biochar and organic manures; environmental bioremediation; abiotic stress tolerance in plants; metal toxicity in plants; plant physiology and biochemistry; carbon dynamics; health hazard assessment; carbon sequestration
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Guest Editor
Department of Plant Physiology and Biochemistry, Faculty of Biochemistry, Biophysics and Biotechnology, Jagiellonian University, Gronostajowa 7, 30-387 Krakow, Poland
Interests: biochemistry and biophysics of plants and algae; biochemistry and biophysics of pigments; interactions of the biotic (pathogens) and abiotic (temperature, light) factors with plants; environmental biotechnology; lipid models of biological membranes; plant-bacterial interactions; xanthophyll cycle
Special Issues, Collections and Topics in MDPI journals

Special Issue Information

Dear Colleagues,

Heavy metal contamination is a major concern in today’s world. Both geogenic and anthropogenic activities are responsible for the increase in the metal concentration in the environment. These activities also negatively influence the beneficial microbiota of the soil. Plant growth-promoting rhizobacteria (PGPR) were found to be a promising additive for reducing contaminants by bioabsorption, biotransformation, bioaccumulation, and biomineralization, minimizing the transfer of these contaminants to plants. In addition, the charring of biomass under limited oxygen at a high temperature results in the generation of a carbonaceous material called “biochar”. With a high porosity and water holding capacity, as well as a wide range of pH values with multiple micro- and macro-nutrients, biochar is a promising additive in bioremediation. Moreover, the presence of various functional groups aid in the sorption of heavy metals, and thus, stabilizes their mobility. They provide shelter, nutrients and hydration, making the best place for the extensive growth of microorganisms, which helps in plant growth. Utilization of a high lignocellulosic and extensive shoot biomass of plants could be a great alternative for the production of biochar and bioenergy production, and thus, could help in carbon sequestration.

The aim of this Special Issue is to address all the above reported aspects including, but not limited to:

  • Metal contamination assessment;
  • Metal bioavailability and bioaccessibility;
  • Plant and/or microbe-assisted bioremediation;
  • Application of biochar in metal decontamination;
  • Identification of high lignocellulosic biomass;
  • Bioenergy production using biomass;
  • Carbon sequestration, etc.

Dr. Adarsh Kumar
Dr. Dariusz Latowski
Guest Editors

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Keywords

  • heavy metals
  • plants
  • bioremediation
  • biochar
  • carbon sequestration

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Published Papers (2 papers)

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Research

24 pages, 4451 KiB  
Article
Biostimulant and Arbuscular Mycorrhizae Application on Four Major Biomass Crops as the Base of Phytomanagement Strategies in Metal-Contaminated Soils
by Pietro Peroni, Qiao Liu, Walter Zegada Lizarazu, Shuai Xue, Zili Yi, Moritz Von Cossel, Rossella Mastroberardino, Eleni G. Papazoglou, Andrea Monti and Yasir Iqbal
Plants 2024, 13(13), 1866; https://doi.org/10.3390/plants13131866 - 5 Jul 2024
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Abstract
Using contaminated land to grow lignocellulosic crops can deliver biomass and, in the long term, improve soil quality. Biostimulants and microorganisms are nowadays an innovative approach to define appropriate phytomanagement strategies to promote plant growth and metal uptake. This study evaluated biostimulants and [...] Read more.
Using contaminated land to grow lignocellulosic crops can deliver biomass and, in the long term, improve soil quality. Biostimulants and microorganisms are nowadays an innovative approach to define appropriate phytomanagement strategies to promote plant growth and metal uptake. This study evaluated biostimulants and mycorrhizae application on biomass production and phytoextraction potential of four lignocellulosic crops grown under two metal-contaminated soils. Two greenhouse pot trials were setup to evaluate two annual species (sorghum, hemp) in Italy and two perennial ones (miscanthus, switchgrass) in China, under mycorrhizae (M), root (B2) and foliar (B1) biostimulants treatments, based on humic substances and protein hydrolysates, respectively, applied both alone and in combination (MB1, MB2). MB2 increased the shoot dry weight (DW) yield in hemp (1.9 times more), sorghum (3.6 times more) and miscanthus (tripled) with additional positive effects on sorghum and miscanthus Zn and Cd accumulation, respectively, but no effects on hemp metal accumulation. No treatment promoted switchgrass shoot DW, but M enhanced Cd and Cr shoot concentrations (+84%, 1.6 times more, respectively) and the phytoextraction efficiency. Root biostimulants and mycorrhizae were demonstrated to be more efficient inputs than foliar biostimulants to enhance plant development and productivity in order to design effective phytomanagement strategies in metal-contaminated soil. Full article
(This article belongs to the Special Issue Biochar, Bioremediation and Bioenergy)
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16 pages, 2101 KiB  
Article
Amaranthus Biochar-Based Microbial Cell Composites for Alleviation of Drought and Cadmium Stress: A Novel Bioremediation Approach
by Tripti, Adarsh Kumar, Maria Maleva, Galina Borisova and Mani Rajkumar
Plants 2023, 12(10), 1973; https://doi.org/10.3390/plants12101973 - 13 May 2023
Cited by 4 | Viewed by 1495
Abstract
Metal contamination coupled with aridity is a major challenge for remediation of abiotic stressed soils throughout the world. Both biochar and beneficial bacteria showed a significant effect in bioremediation; however, their conjugate study needs more exploration. Two rhizobacteria strains Serratia sp. FV34b and [...] Read more.
Metal contamination coupled with aridity is a major challenge for remediation of abiotic stressed soils throughout the world. Both biochar and beneficial bacteria showed a significant effect in bioremediation; however, their conjugate study needs more exploration. Two rhizobacteria strains Serratia sp. FV34b and Pseudomonas sp. ASe42b isolated from multi-metal and drought stressed sites showed multiple plant-growth-promoting attributes (phosphate solubilization, indole-3-acetic acid, siderophore, and ammonia production). Both strains were able to tolerate a high concentration of Cd along with being resistant to drought (−0.05 to −0.73 MPa). The seldom studied biomass of Amaranthus caudatus L. was used for biochar preparation by pyrolyzing it at 470 °C for 160 min under limited oxygen and then using it for the preparation of biochar-based microbial cell composites (BMC)s. To check the efficiency of BMC under Cd stress (21 mg kg−1 soil) and drought, a pot-scale study was conducted using Brassica napus L. for 47 days. Both the BMC5 (Biochar + Serratia sp. FV43b) and BMC9 (Biochar + Pseudomonas sp. ASe42b) improved the seed germination, plant biometrical (shoot and root biomass, length of organs) and physiological (photosynthetic pigments, proline, malondialdehyde, and relative water content) parameters under drought (exerted until it reaches up to 50% of field capacity) and Cd-spiked soil. However, for most of them, no or few significant differences were observed for BMC9 before and after drought. Moreover, BMC9 maximized the Cd accumulation in root and meager transfer to shoot, making it a best bioformulation for sustainable bioremediation of Cd and drought stressed soils using rapeseed plant. Full article
(This article belongs to the Special Issue Biochar, Bioremediation and Bioenergy)
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