Effect of terminal temperature on the morphology and potentially toxic metals concentrations of biochars derived from paper and kitchen waste

Wang, Shuangchao; Shi, Rui; Li, Hao; Li, Yunzhen; Xu, Yu-Hui; Han, Zhiyong

doi:10.1016/j.wasman.2020.09.012

Cited by 7 publications

(3 citation statements)

References 36 publications

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“…Although a few researchers have indicated that there could be organic (PAHs, low molecular weight organic acids and phenols, etc.) and inorganic (heavy metals) pollutants in biochars, which could pose the potential phytotoxic effects and environmental risk [8][9][10][11][12][13][14][15], the risk of pollutants in biochars could be reduced through optimizing pyrolysis conditions and removing pollutants before their large-scale agronomic application [8][9][10][11][12][13][14]. It has been shown that biochar amendment can facilitate the plant growth due to its effects on phytoavailability of the indispensable nutrients (e.g.…”

Section: Introductionmentioning

confidence: 99%

Effects of Biochar and Sulfate Amendment on Plant Physiological Characteristics, Soil Properties and Sulfur Phytoavailability of Corn in Calcids Soil

Zhao¹,

Zhang²

2021

Pol. J. Environ. Stud.

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Although sulfur is an indispensable element for plants, its availability to plants in the presence of biochar is unclear. The effects of dairy manure biochar at the rate of 0, 0.5, 1, 2, and 5% on plant physiological characteristics, soil properties and sulfur phytoavailability in corn (Zea mays L.)-Calcids soil system were investigated using pot experiments with sulfate amendment at low, moderate and high level (0, 50 and 100 mg S kg -1 soil). It was found that the plant height, fresh and dry weight, and chlorophyll content were significantly improved with the biochar addition rate increasing from 0 to 2% while largely decreased with the rate increasing from 2% to 5%. The moderate level of sulfate amendment favored the corn biomass and chlorophyll content. The pH values of soil were significantly increased with increasing biochar addition rate, reaching about 8.50 at the rate of 5%. The catalase, urease and sucrase activity in soil increased significantly with the biochar addition from 0 to 2% but largely decreased with the rate increasing from 2% to 5%. Too high pH values due to 5% biochar addition resulted in the inhibitory effects on plant growth and microorganism activity in soil. Biochar addition at low rates (<2%) and sulfate amendment at high level improved sulfur content in leaves and roots. The decreases of inorganic sulfur and total sulfur contents in soil with biochar addition rates significantly responded to the accumulation of sulfur in leaves and roots. The results show that co-application of biochar and sulfate with proper amount could improve the growth and sulfur phytoavailability of plant in calcareous soil.

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Section: Introductionmentioning

confidence: 99%

Effects of Biochar and Sulfate Amendment on Plant Physiological Characteristics, Soil Properties and Sulfur Phytoavailability of Corn in Calcids Soil

Zhao¹,

Zhang²

2021

Pol. J. Environ. Stud.

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“…However, with the rapid urbanization and industrialization various contaminants [such as HMs, radioactive elements and organics, etc.] are being introduced into the soil system through directly discharged to contain more than the allowable standard contaminant concentrations (Wang et al 2020;Rybak et al 2018;Feng et al 2018). HMs have ranked the rst among all soil contaminant types due to their high toxicity, bioaccumulation, persistence and mobility in soils (He et al 2020;Yang et al 2020).…”

Section: Introductionmentioning

confidence: 99%

Passivation and remediation of Pb and Cr in contaminated soil by sewage sludge biochar tubule

Chen

et al. 2021

Environ Sci Pollut Res

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Currently, numerous studies have carried out to research the effect of biochars remediation soil heavy metals (HMs) contaminated, but there have been fewer explorations of the effect of biochars tubule on soil HMs remediation. This work aimed was to study the effect of passivation and remediation of lead (Pb) and chromium (Cr) contaminated soil after insert sewage sludge biochar (SSB) tubule. The results showed that the high risky fractions of Pb and Cr could be transformed into more stable fractions, also, Pb and Cr total contents are signi cantly decreased by SSB tubule. The mechanisms including adsorption, ion exchange, complexation and precipitation which are concluded from the characteristic analysis. Detailly, the passivation of Pb and Cr are better when the moisture at 25% and 35%, respectively, [Pb: exchangeable (F1), carbonate bound (F2) decreased by 25.1%, 16.8%, Fe-Mn oxides bound (F3) increased by 18.5%; Cr: F1 decreased by 73.0%, F2, F3, Organic matter bound (F4) increased by 13.2%, 23.9%, 30.8%), respectively]. The remediation of Pb and Cr is better when the moisture at 25% and 35%, respectively, (Pb: decreased by 23.3%; Cr: decreased by 38.4%, respectively). The ndings showed that the SSB tubule is effective when used for soil HMs contaminated.

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“…Wang et al (2020) added 10% (w/w) kitchen waste-based biochar to Ba contaminated soil in land ll areas, Tibet, China, which decreased the concentration by 10.1%. Li et al (2016) added biochar to Cd contaminated soil, found decreased the total content by 46.4%.…”

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confidence: 99%

Passivation and Remediation of Pb and Cr in Contaminated Soil by Sewage Sludge Biochar Tubule

Chen

et al. 2021

Preprint

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Currently, numerous studies have carried out to research the effect of biochars remediation soil heavy metals (HMs) contaminated, but there have been fewer explorations of the effect of biochars tubule on soil HMs remediation. This work aimed was to study the effect of passivation and remediation of lead (Pb) and chromium (Cr) contaminated soil after insert sewage sludge biochar (SSB) tubule. The results showed that the high risky fractions of Pb and Cr could be transformed into more stable fractions, also, Pb and Cr total contents are significantly decreased by SSB tubule. The mechanisms including adsorption, ion exchange, complexation and precipitation which are concluded from the characteristic analysis. Detailly, the passivation of Pb and Cr are better when the moisture at 25% and 35%, respectively, [Pb: exchangeable (F1), carbonate bound (F2) decreased by 25.1%, 16.8%, Fe-Mn oxides bound (F3) increased by 18.5%; Cr: F1 decreased by 73.0%, F2, F3, Organic matter bound (F4) increased by 13.2%, 23.9%, 30.8%), respectively]. The remediation of Pb and Cr is better when the moisture at 25% and 35%, respectively, (Pb: decreased by 23.3%; Cr: decreased by 38.4%, respectively). The findings showed that the SSB tubule is effective when used for soil HMs contaminated.

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Effect of terminal temperature on the morphology and potentially toxic metals concentrations of biochars derived from paper and kitchen waste

Cited by 7 publications

References 36 publications

Effects of Biochar and Sulfate Amendment on Plant Physiological Characteristics, Soil Properties and Sulfur Phytoavailability of Corn in Calcids Soil

Effects of Biochar and Sulfate Amendment on Plant Physiological Characteristics, Soil Properties and Sulfur Phytoavailability of Corn in Calcids Soil

Passivation and remediation of Pb and Cr in contaminated soil by sewage sludge biochar tubule

Passivation and Remediation of Pb and Cr in Contaminated Soil by Sewage Sludge Biochar Tubule

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