The Influence of Biochar Production on Herbicide Sorption Characteristics

Clay, Sharon A.; Malo, D. D.

doi:10.5772/31492

Cited by 9 publications

(17 citation statements)

References 43 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Some biochars have high pH and can act as liming agents to increase pH in acidic soils. This soil amendment enhances micro elements bio-availability and consequently prevents these nutrients deficiencies in plants (Clay and Malo 2012). It can also stabilize heavy metals and decrease their release at levels toxic to the soil.…”

Section: Biocharmentioning

confidence: 99%

Biochar efficiency in pesticides sorption as a function of production variables—a review

Yavari

Malakahmad

Sapari

2015

Environ Sci Pollut Res

103

View full text Add to dashboard Cite

Biochar is a stabilized, carbon-rich by-product derived from pyrolysis of biomass. Recently, biochar has received extensive attentions because of its multi-functionality for agricultural and environmental applications. Biochar can contribute to sequestration of atmosphere carbon, improvement of soils quality, and mitigation of environmental contaminations. The capability of biochar for specific application is determined by its properties which are predominantly controlled by source material and pyrolysis route variables. The biochar sorption potential is a function of its surface area, pores volume, ash contents, and functional groups. The impacts of each production factors on these characteristics of biochar need to be well-understood to design efficient biochars for pesticides removal. The effects of biomass type on biochar sorptive properties are determined by relative amounts of its lingo-cellulosic compounds, minerals content, particles size, and structure. The highest treatment temperature is the most effective pyrolysis factor in the determination of biochar sorption behavior. The expansion of micro-porosity and surface area and also increase of biochar organic carbon content and hydrophobicity mostly happen by pyrolysis peak temperature rise. These changes make biochar suitable for immobilization of organic contaminants. Heating rate, gas pressure, and reaction retention time after the pyrolysis temperatures are sequentially important pyrolysis variables effective on biochar sorptive properties. This review compiles the available knowledge about the impacts of production variables on biochars sorptive properties and discusses the aging process as the main factor in post-pyrolysis alterations of biochars sorption capacity. The drawbacks of biochar application in the environment are summarized as well in the last section.

show abstract

Section: Biocharmentioning

confidence: 99%

Biochar efficiency in pesticides sorption as a function of production variables—a review

Yavari

Malakahmad

Sapari

2015

Environ Sci Pollut Res

103

View full text Add to dashboard Cite

show abstract

“…A model to represent the data of the sorption and desorption coefficients (K d ) in biochar-amended and unamended soils is proposed by Clay and Malo (2012). Thus, Mendes et al (2016) evaluated the effect of amending soils with soybean stover, sugarcane bagasse, and wood chips derived biochars or raw feedstocks on the sorption-desorption of metolachlor applied in different soils from three US states (Minnesota, silt loam; Illinois, silty clay loam; and Pennsylvania, silt loam) (Figure 3).…”

Section: Herbicides Behavior In Biochar-amended Brazilian Soilsmentioning

confidence: 99%

“…Biochar is produced through the by-product of a thermal process conducted under low oxygen or oxygen-free conditions (pyrolysis) to convert any vegetative biomass to biofuel, according to Clay and Malo (2012). Pyrolysis is a process that involves the application of heat to biomass in order to concentrate the heat and collect the by-products (Khorram et al, 2016).…”

Section: Introductionmentioning

confidence: 99%

“…Depending on the type and amount of biochar applied, the changes in soil properties associated with the application (e.g. soil pH, electrical conductivity) as well as the physicochemical properties of the char itself, may impact the use, rates, efficacious properties, and fates of pesticide used in agronomic management, such as herbicides (Clay and Malo, 2012).…”

Section: Introductionmentioning

confidence: 99%

“…The great concern of researchers is that addition of biochar in the soil can potentiate sorption processes, and it may have negative impacts on weed management, reducing herbicide efficacy, consequently it will be necessary to apply higher doses of herbicides (Clay and Malo, 2012). On the other hand, positive impacts are also reported with the addition of biochar in soil, such as the increased sorption capacity of herbicides, due to provavelmente por falta de incentivo do governo, baixo uso dos produtores e consciência dos benefícios.…”

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Biochar impact on herbicides behavior in the soils: an approach in Brazil

Mendes¹,

Almeida

Inoue

et al. 2018

RBHerbicidas

View full text Add to dashboard Cite

-The application of biochar to soils because of beneficial effects is proven by many international researchers and this can increase herbicides sorption and reduce effectiveness on weed management. Positive impacts are reported in relation to the environmental behavior of herbicides, since the increase of the sorption reduces the leaching of these products to groundwater. Negative impacts are reported in relation to agronomic management of herbicides, since the sorption increase reduces the availability of these products in the soil, reducing the residual effect for weed control. In Brazil, biochar is produced by several private companies and pyrolysis units, but the cost for production is still very high, probably due to lack of government incentive, low use of producers, and awareness of the benefits. Although biochar has been used for several decades in other countries, in Brazil there are still few studies developed by soil researchers, and biochar efficiency on the bioavailability of herbicide in the soil is still unknown by many weed science Brazilian researchers. Against the above, the objective of this review was to evaluate the bioavailability of herbicides in biochar-amended soils and highlight the research with biochar in Brazilian conditions, besides presenting the benefits to soil with biochar addition. Little is known about the herbicides behavior in Brazilian soils amended with biochar, which can be used with greater intensity in modern agriculture. So more research is needed under our conditions to really we understand the dynamics of this product in the soil. Keywords: black carbon, retention, management practices, soil behavior Resumo -A aplicação de biochar (biocarvão) em solos por causa dos efeitos benéficos é comprovada por muitos pesquisadores internacionais e isto pode aumentar a sorção dos herbicidas e reduzir a eficácia destes no manejo das plantas daninhas. Impactos positivos são relatados em relação ao comportamento ambiental dos herbicidas, pois o aumento da sorção reduz a lixiviação destes produtos para as águas subterrâneas. Impactos negativos são relatados em relação ao manejo agronômico dos herbicidas, pois o aumento da sorção reduz a disponibilidade destes produtos no solo, diminuindo o efeito residual para o controle das plantas daninhas. No Brasil, o biochar é produzido por várias empresas privadas e unidades de pirólise, entretanto, o custo para produção ainda é muito alto, Mendes et al. Rev. Bras. Herb

show abstract

Engineered Biochar as Adsorbent for Removal of Emerging Contaminants from Aqueous and Soil Medium

Medyńska‐Juraszek

Ćwieląg-Piasecka

2022

Engineered Biochar

View full text Add to dashboard Cite

The Influence of Biochar Production on Herbicide Sorption Characteristics

Cited by 9 publications

References 43 publications

Biochar efficiency in pesticides sorption as a function of production variables—a review

Biochar efficiency in pesticides sorption as a function of production variables—a review

Biochar impact on herbicides behavior in the soils: an approach in Brazil

Engineered Biochar as Adsorbent for Removal of Emerging Contaminants from Aqueous and Soil Medium

Contact Info

Product

Resources

About