Atrazine leaching from biochar-amended soils

Delwiche, Kyle; Lehmann, Johannes; Walter, M. Todd

doi:10.1016/j.chemosphere.2013.09.043

Cited by 96 publications

(48 citation statements)

References 52 publications

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“…In addition, the amount of fomesafen leached from the columns was conversely related with the amount of biochar added (Pearson correlation test: r > 0.985, p < 0.05). These results agree with previous observations of other chemicals . Si et al observed that a significant decreased in isoproturon leaching form 3 soils amended with different amounts of charcoal resulted from the larger adsorption capacity of charcoal for isoproturon.…”

Section: Results and Disscussionsupporting

confidence: 92%

Reduced mobility of fomesafen through enhanced adsorption in biochar‐amended soil

Khorram

Wang

Jin

et al. 2015

Enviro Toxic and Chemistry

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The residual soil material resulting from biomass thermochemical transformation during carbon separation, known as biochar, has been introduced as a soil amendment because of its numerous environmental benefits, including uses for contaminated land management. Adsorption and leaching of fomesafen in soils amended with 3 different rates of rice hull biochar (0.5%, 1%, and 2% w/w) under laboratory conditions were investigated, and studies were performed following a batch equilibration adsorption-desorption procedure and a column experiment for leaching. Adsorption-desorption data fit with the Freundlich equation well. The adsorption coefficient of fomesafen sharply increased from 0.59 to 0.99 to 8.02 to 22.23 when the amount of biochar amendment in the soil increased from 0% to 2% (w/w). In addition, a strong correlation was found between the amount of adsorbed fomesafen and the rate of amended biochar (r > 0.992, p < 0.01). Furthermore, biochar amendments reduced the desorption percentage of fomesafen in the soils. The outcomes of the leaching experiment also illustrated that the lowest fomesafen concentration in the leachate (21.4%) occurred in the soil amended with 2% (w/w) biochar. Moreover, the adsorption coefficients (K(f)(ads)) of the soil were positively correlated with the total amount of adsorbed fomesafen in the corresponding soil columns (r = 0.990, p < 0.01) and negatively correlated with the leachate percentage (r = 0.987, p < 0.05). The results of the present study suggest that biochar amendments in agricultural soils likely alter the fate of herbicides by decreasing their transport through enhanced adsorption.

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Section: Results and Disscussionsupporting

confidence: 92%

Reduced mobility of fomesafen through enhanced adsorption in biochar‐amended soil

Khorram

Wang

Jin

et al. 2015

Enviro Toxic and Chemistry

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“…Most of the available studies on nitrate leaching, however, have been conducted under a small range of soil textural classes, primarily on coarse‐textured soils, which are most susceptible to nitrate leaching. In general, biochar can be most effective for improving soil properties and productivity in coarse‐textured soils, low organic matter soils, and soils with reduced aggregate stability (Delwiche et al, 2014; Abrol et al, 2016; Blanco‐Canqui, 2017). Time after biochar application can also affect biochar performance.…”

Section: Biochar Amendment and Nutrient Leaching From Soilmentioning

confidence: 99%

“…The strong sorption of pesticides by biochar not only reduces pesticide losses through leaching but also reduces their losses through other pathways such as volatilization and erosion. For example, Delwiche et al (2014) conducted laboratory and field experiments to determine pine chip biochar impacts on atrazine leaching and found that biochar applied at 10 Mg ha −1 reduced cumulative atrazine leaching by 52% in soil columns. Biochar has been used in filtration systems to remove organic pollutants because of its high potential to adsorb toxic organic compounds (Miles et al, 2016).…”

Section: Pesticide Lossesmentioning

confidence: 99%

Biochar and Water Quality

Blanco‐Canqui¹

2019

J of Env Quality

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Biochar application is considered to be an emerging strategy to improve soil ecosystem services. However, implications of such application on water quality parameters have not been widely discussed. This paper synthesizes the state‐of‐the‐art research on biochar effects on water erosion, nitrate leaching, and other sources of water pollution. Literature indicates that in general, biochar application reduces runoff by 5 to 50% and soil loss by 11 to 78%, suggesting that it can be effective at reducing water erosion, but the magnitude of erosion reduction is highly variable. Co‐application of biochar with other organic amendments (i.e., animal manure, compost) appears to be more effective at reducing water erosion than biochar alone. A main mechanism by which biochar can reduce water erosion is by improving soil properties (i.e., organic C, hydraulic conductivity, aggregate stability), which affect soil erodibility. This review also indicates that biochar reduces nitrate leaching, in most cases by 2 to 88%, but has mixed effect on phosphate and dissolved C leaching. Additionally, biochar effectively filters urban runoff, adsorbs pollutants, and reduces pesticides losses. Biochar feedstock, pyrolysis temperature, application amount, time after application, and co‐application with other amendments affect biochar impacts on water quality. Biochar erosion and potential reduction in nutrient and pesticide use efficiency due to the strong adsorption are concerns that deserve consideration. Overall, biochar application has the potential to reduce water erosion, nitrate leaching, pesticide losses, and other pollutant losses, but more field‐scale data are needed to better discern the extent to which biochar can improve water quality. Core Ideas Biochar can reduce water erosion, but the magnitude of reduction is variable. Biochar combined with other organic amendments can reduce water erosion more than biochar alone. Biochar can reduce nitrate leaching but has mixed effects on phosphate and dissolved C leaching. Biochar filters urban runoff, adsorbs organic pollutants, and reduces pesticide losses. More field data on the effectiveness of biochar for improving water quality are needed.

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“…[43][44][45] These studies suggested that the decrease in pesticide leaching in amended soils was due to the increased sorption and decreased desorption. [43][44][45] These studies suggested that the decrease in pesticide leaching in amended soils was due to the increased sorption and decreased desorption.…”

Section: Inuence Of Biochar On the Leaching Of Bpa And Ee2mentioning

confidence: 99%

Influence of biochar on sorption, leaching and dissipation of bisphenol A and 17α-ethynylestradiol in soil

Zhang

Tan

et al. 2015

Environ. Sci.: Processes Impacts

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Biochar, as a soil amendment, provided a very cost-effective, convenient route to dispose organic residues. In the present study, the impact of adding biochar on the sorption, leaching and dissipation processes of bisphenol A (BPA) and 17α-ethynylestradiol (EE2) in soil was investigated. The biochar derived from corn stalks at 500 °C for 1.5 h was characterized by a highly aromatic and microporous structure with various functional groups on the surface. In the batch sorption studies, the application of 4 wt% biochar to soil significantly increased the solid-water distribution coefficients by 263% for BPA and by 298% for EE2 at the pollutant equilibrium concentration of 0.01 mg L(-1). In the leaching experiment, after five leaching periods, soil amended with 1 wt%, 2 wt% and 4 wt% biochar reduced the cumulative amount by 19%, 28% and 53% for BPA, 42%, 58% and 77% for EE2 compared to the biochar-free soil. Interestingly, during the 90 d incubation experiment, BPA and EE2 dissipations were not significantly affected by the added biochar, while remarkable decreases of CaCl2 extractable BPA and EE2 were observed. The overall results highlighted the distinctive potential of this biochar in reducing the mobility of BPA and EE2 in soil, meanwhile without attenuating the degradation of the two pollutants.

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Atrazine leaching from biochar-amended soils

Cited by 96 publications

References 52 publications

Reduced mobility of fomesafen through enhanced adsorption in biochar‐amended soil

Reduced mobility of fomesafen through enhanced adsorption in biochar‐amended soil

Biochar and Water Quality

Influence of biochar on sorption, leaching and dissipation of bisphenol A and 17α-ethynylestradiol in soil

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