当前位置: X-MOL 学术Int. J. Environ. Res. › 论文详情
Our official English website, www.x-mol.net, welcomes your feedback! (Note: you will need to create a separate account there.)
Biochar Application Rate: Improving Soil Fertility and Linum usitatissimum Growth on an Arsenic and Lead Contaminated Technosol
International Journal of Environmental Research ( IF 3.2 ) Pub Date : 2021-01-03 , DOI: 10.1007/s41742-020-00302-0
Manhattan Lebrun , Florie Miard , Romain Nandillon , Domenico Morabito , Sylvain Bourgerie

The remediation of metal(loid) contaminated sites often requires the application of an amendment, such as biochar. Biochar is the product of biomass pyrolysis and has been shown to reduce soil acidity, immobilize metal(loid)s and thus ameliorate plant growth. The beneficial effects of biochar are usually higher at a higher dose. However, an excessive dose can have negative outcomes due to nutrient loss. The application of an amendment to the soil comes at a financial cost, especially if the contaminated area is large, and therefore the optimum dose must be determined. In addition, to overcome the cost of biochar application, the use of a plant with economic benefits, such as flax, can be a suitable option. In this context, a mesocosm study, on a former mining soil polluted by As and Pb was performed, using flax and biochar applied at increasing concentrations. Results showed an increase in soil pH and the immobilization of Pb with increasing biochar doses. These ameliorations led to better plant growth. A higher biochar dose increased plant growth up to a 3% application rate, from which point dry weight no longer increased.Metal(loid) concentrations decreased between 1 and 3% biochar, and then increased at higher doses. It can thus be concluded that with 3% biochar, soil properties are ameliorated, metal(loid)s are immobilized, and plant growth increases, and a higher biochar application rate does not bring about better outcomes. Therefore, a 3% biochar application dose seems to be the best application dose to improve soil conditions and plant growth at a lower cost. Application dose of a lightwood biochar was tested on a former mine soil A higher biochar dose led to increased soil condition improvements Flax growth improved up to 3% biochar then decreased The optimum biochar dose was determined to be 3%

中文翻译:

生物炭施用率:在砷和铅污染的技术溶胶上提高土壤肥力和亚麻生长

金属(液体)污染场地的修复通常需要应用修正物,例如生物炭。生物炭是生物质热解的产物,已被证明可以降低土壤酸度,固定金属(类)物质,从而改善植物生长。biochar 的有益作用通常在更高的剂量下更高。然而,过量的剂量会因营养流失而产生负面影响。对土壤使用改良剂需要付出一定的经济代价,尤其是在受污染区域很大的情况下,因此必须确定最佳剂量。此外,为了克服生物炭应用的成本,使用具有经济效益的植物,例如亚麻,可能是一个合适的选择。在此背景下,对被 As 和 Pb 污染的前采矿土壤进行了中观研究,使用以递增浓度施用的亚麻和生物炭。结果表明,随着生物炭剂量的增加,土壤 pH 值增加和 Pb 的固定化。这些改进导致更好的植物生长。较高的生物炭剂量可将植物生长增加到 3% 的施用率,从那时起干重不再增加。金属(液体)浓度在 1% 到 3% 的生物炭之间下降,然后在较高剂量下增加。因此可以得出结论,使用3%的生物炭,土壤性质得到改善,金属(类)物被固定,植物生长增加,更高的生物炭施用率并不会带来更好的结果。因此,3% 的生物炭施用剂量似乎是以较低成本改善土壤条件和植物生长的最佳施用剂量。
更新日期:2021-01-03
down
wechat
bug