Does livestock-Manure-Derived Biochar Suitable for the Stabilization of Cadmium and Zinc in Contaminated Soil?

IF 2.7 4区环境科学与生态学 Q3 ENVIRONMENTAL SCIENCES Bulletin of Environmental Contamination and Toxicology Pub Date : 2024-04-02 DOI:10.1007/s00128-024-03881-2

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Abstract

Both livestock-manure and livestock-manure-derived biochar have been used to remediate heavy metal-contaminated soil. However, direct comparisons of the heavy metal stabilization efficiency of livestock-manure and EQC-manure-biochar (derived from an equal quantity of corresponding livestock-manure) are limited. In the present study, the effect of livestock-manures and EQC-manure-biochars on soil properties and heavy metal bioavailability and leachability were compared using two contrasting soils (Ferralsols and Fluvisols). The results showed that both the livestock-manures and EQC-manure-biochars significantly changed soil pH, available phosphorus, available potassium, alkaline nitrogen and organic matter content (p < 0.05), but the trends were variable. In Ferralsols, the DTPA-extractable Cd and Zn decreased by -0.38%~5.70% and − 3.79%~9.98% with livestock-manure application and by -7.99%~7.23% and − 5.67%~7.17% with EQC-manure-biochars application. In Fluvisols, the DTPA-extractable Cd and Zn decreased by 13.39%~17.41% and − 45.26%~14.24% with livestock-manure application and by 10.76%~16.90% and − 36.38%~16.37% with EQC-manure-biochar application. Furthermore, the change in TCLP-extractable Cd and Zn in both soils was similar to that of DTPA-extractable Cd and Zn. Notably, the Cd and Zn stabilization efficiency of the EQC-manure-biochars was no better than that of the corresponding livestock-manures. These results suggest that the use of livestock-manure-derived biochar is not cost-effective for the remediation of heavy metal-contaminated soil.

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畜禽粪便产生的生物炭是否适合稳定受污染土壤中的镉和锌？

摘要畜禽粪便和畜禽粪便衍生生物炭都被用于修复重金属污染的土壤。然而，直接比较牲畜粪便和 EQC 粪便生物炭（从等量的相应牲畜粪便中提取）的重金属稳定效率却很有限。在本研究中，使用两种对比土壤（Ferralsols 和 Fluvisols）比较了家畜粪便和 EQC 粪便生物炭对土壤性质、重金属生物利用率和浸出率的影响。结果表明，家畜粪肥和 EQC 粪便生物酵素都能显著改变土壤的 pH 值、可利用磷、可利用钾、碱解氮和有机质含量（p < 0.05），但变化趋势各不相同。在铁质土壤中，施用牲畜粪便可使 DTPA 萃取的镉和锌分别减少-0.38%~5.70%和-3.79%~9.98%，而施用 EQC 粪便生物酵母可使 DTPA 萃取的镉和锌分别减少-7.99%~7.23%和-5.67%~7.17%。在氟溶胶中，施用牲畜粪肥后，DTPA 可萃取镉和锌分别减少了 13.39%~17.41% 和 -45.26%~14.24% ；施用 EQC 粪肥生物炭后，DTPA 可萃取镉和锌分别减少了 10.76%~16.90% 和 -36.38%~16.37% 。此外，两种土壤中 TCLP 可萃取镉和锌的变化与 DTPA 可萃取镉和锌的变化相似。值得注意的是，EQC-粪便生物炭的镉和锌稳定效率并不比相应的牲畜粪便高。这些结果表明，使用家畜粪便衍生的生物炭来修复受重金属污染的土壤并不划算。

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来源期刊

Bulletin of Environmental Contamination and Toxicology 环境科学-毒理学

CiteScore

5.60

自引率

3.70%

发文量

230

审稿时长

1.7 months

期刊介绍： The Bulletin of Environmental Contamination and Toxicology(BECT) is a peer-reviewed journal that offers rapid review and publication. Accepted submissions will be presented as clear, concise reports of current research for a readership concerned with environmental contamination and toxicology. Scientific quality and clarity are paramount.