A review on control factors of pyrolysis technology for plants containing heavy metals

Liu, Zhongchuang; Wang, Liao; Xiao, Hongyan; Guo, Xiaowei; Urbanovich, O. Yu.; Nagorskaya, Liubov; Li, Xiang

doi:10.1016/j.ecoenv.2020.110181

Cited by 30 publications

(15 citation statements)

References 104 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…The maximum effect on the heavy metal concentration was observed when biochar was applied at the B3 (9%), followed by B1 (3%) and B2 (6%) (Table 1). In agreement with our results, many previous studies have reported that biochar application significantly increases the immobilization of heavy metals in soils as well as reduces their bioavailability for plant uptake (Kim et al 2015; Dang et al 2015; Liu et al 2020; Antonangelo & Zhang, 2020). These studies have demonstrated that the biochar interacts with the heavy metals in the soil, thus the ions of heavy metals are adsorbed on the pore surfaces, and transformed into the carbonate, hydroxide, and phosphate precipitates.…”

Section: Resultssupporting

confidence: 93%

Biochar supplementation regulates growth and heavy metal accumulation in tomato grown in contaminated soils

Álam

Alam

Khan

et al. 2021

Physiologia Plantarum

View full text Add to dashboard Cite

Biochar application has recently gained increased attention to reclaim heavy metal degraded soils. In this context, the present study investigated the effects of biochar on the growth regulation and heavy metal accumulation in tomato grown on contaminated soils. A two‐factorial design with factor A including three treatments with mine (contaminated soil) and garden soil in the following ratio viz., T1 = 1:2, T2 = 1:1, and T3 = 2:1, and garden soil only as control; whereas factor B consists of biochar amendments at three levels viz., B1 (3%), B2 (6%), and B3 (9%). Our results revealed significant negative effects of heavy metal‐contaminated soil on plant growth, and besides resulted heavy metal accumulation in tomato fruit. Tomato plants showed maximum reduction of growth in T3 followed by T2, and lowest in T1, a similar pattern was found for accumulation of heavy metals in the fruit. However, the application of biochar reduced the bioavailability and accumulation of heavy metals in the tomato fruit, as well as improved plant growth in contaminated soils. Overall, among the three biochar treatments, B2 was determined as the optimum level for improved growth coupled with reduced heavy metal accumulation in the tomato fruit. Besides, biochar application decreased the daily intake of metals and human health risk index values, thus alleviating the health risk. Hence, the present study demonstrated a positive role of biochar in reclaiming heavy metal‐contaminated soils and in increasing the plant growth.

show abstract

Section: Resultssupporting

confidence: 93%

Biochar supplementation regulates growth and heavy metal accumulation in tomato grown in contaminated soils

Álam

Alam

Khan

et al. 2021

Physiologia Plantarum

View full text Add to dashboard Cite

show abstract

“…This is the case, for example, of some agricultural residues such as cereal straw and rice husks rich in Si or hyperaccumulator plants grown on contaminated soils enriched with heavy metals (HMs). HMs, which are usually neglected due to their overall low level of concentration, exhibited a clear role in catalytic upgrading of biomass pyrolysis assisted by zeolite-based catalysts but also raised environmental issues due to their transfer to the condensable fraction or their retention in the char. , …”

Section: Introductionmentioning

confidence: 99%

Inherent Metal Elements in Biomass Pyrolysis: A Review

Giudicianni¹,

Gargiulo²,

Grottola³

et al. 2021

Energy Fuels

View full text Add to dashboard Cite

One of the main drawbacks of using biomass as pyrolysis feedstock consists of the huge variability of the different biomass resources which undermines the viability of downstream processes. Inherent inorganic elements greatly contribute to enhance the compositional variability issues due to their catalytic effect (especially alkali and alkaline earth metals (AAEMs)) and the technical problems arising due to their presence. Due to the different pretreatments adopted in the experimental investigations as well as the different reactor configurations and experimental conditions, some mechanisms involving interactions between these elements and the biomass organic fraction during pyrolysis are still debated. This is the reason why predicting the results of these interactions by adapting the existing kinetic models of pyrolysis is still challenging. In this work, the most prominent experimental works of the last 10 years dealing with the catalytic effects of biomass inherent metals on the pyrolysis process are reviewed. Reaction pathways, products distributions and characteristics, and impacts on the products utilization are discussed with a focus on AAEMs and on potential toxic metallic elements in hyperaccumulator plants. The literature findings are discussed in relation to the applied laboratory procedures controlling the concentration of inherent inorganic elements, their capability of preserving the chemical integrity of the main organic components, and the ability of resembling the inherent inorganic elements in the raw biomass. The goal is to reveal possible experimental inconsistencies and to provide a clear scheme of the reaction pathways altered by the presence of inherent inorganics. This analysis paves the way for the examination of the proposed modifications of the existing models aiming at capturing the effect of inorganics on pyrolysis kinetics. Finally, the most relevant shortcomings and bottlenecks in existing experimental and modeling approaches are analyzed and directions for further studies are suggested.

show abstract

“…By optimizing different parameters (pyrolysis device, temperature and heating rate, addition of catalyzers, etc.) it is possible to influence the amount of generated gaseous, liquid, and solid products, as well as the metal concentrations in them [138,140]. Similarly, the content of cellulose, hemicellulose, and lignin, as well as the moisture content of the biomass feedstock, influence the quality and quantity of the final products [141].…”

Section: The Fate Of Harvested Biomassmentioning

confidence: 99%

Brassica Species in Phytoextractions: Real Potentials and Challenges

Zeremski

Ranđelović

Jakovljević

et al. 2021

Plants

View full text Add to dashboard Cite

The genus Brassica is recognized for including species with phytoaccumulation potential and a large amount of research has been carried out in this area under a variety of conditions, from laboratory experiments to field trials, with spiked or naturally contaminated soils, using one- or multi-element contaminated soil, generating various and sometimes contradictory results with limited practical applications. To date, the actual field potential of Brassica species and the feasibility of a complete phytoextraction process have not been fully evaluated. Therefore, the aim of this study was to summarize the results of the experiments that have been performed with a view to analyzing real potentials and limitations. The reduced biomass and low metal mobility in the soil have been addressed by the development of chemically or biologically assisted phytoremediation technologies, the use of soil amendments, and the application of crop management strategies. Certain issues, such as the fate of harvested biomass or the performance of species in multi-metal-contaminated soils, remain to be solved by future research. Potential improvements to current experimental settings include testing species grown to full maturity, using a greater amount of soil in experiments, conducting more trials under real field conditions, developing improved crop management systems, and optimizing solutions for harvested biomass disposal.

show abstract

A review on control factors of pyrolysis technology for plants containing heavy metals

Cited by 30 publications

References 104 publications

Biochar supplementation regulates growth and heavy metal accumulation in tomato grown in contaminated soils

Biochar supplementation regulates growth and heavy metal accumulation in tomato grown in contaminated soils

Inherent Metal Elements in Biomass Pyrolysis: A Review

Brassica Species in Phytoextractions: Real Potentials and Challenges

Contact Info

Product

Resources

About