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Use of Slaughterhouse Sludge in the Bioremediation of an Oxyfluorfen-Polluted Soil
International Journal of Environmental Research ( IF 3.2 ) Pub Date : 2021-06-25 , DOI: 10.1007/s41742-021-00351-z
Paloma Ávila-Pozo , Juan Parrado , Pablo Caballero , Marta Díaz-López , Felipe Bastida , Manuel Tejada

The use of organic matter is a highly accepted environmental practice among scientists for the bioremediation of polluted soils. In this manuscript we study under laboratory conditions the bioremediation capacity of a new biostimulant obtained from slaughterhouse sludge in a soil polluted by the oxyfluorfen at a rate of 4 l ha−1 (manufacturer’s rate recommended) over a 90-day period. We determined its effects on dehydrogenase, urease, β-glucosidase and phosphatase activities, the soil microbial community structure and the evolution of the herbicide in soil. Possibly due to the high content of low molecular weight proteins in the biostimulant, the enzymatic activities were stimulated mainly at the beginning of the experiment. Soil biological parameters were inhibited in oxyfluorfen-polluted soil. At the end of the experiment and compared with the control soil, dehydrogenase, urease, β-glucosidase, and phosphatase activities significantly decreased by 47.8%, 50.5%, 36.4%, and 45.5% in the oxyfluorfen-polluted soil. At 5 days into the experiment, the use of the biostimulant in oxyfluorfen-polluted soils decreased soil enzymatic activities and microbial community inhibition. At the end of the incubation period the oxyfluorfen concentration had decreased by 60% in the polluted soil and amended with biostimulants. These results suggested that the use of this biostimulant with higher amounts of low molecular weight proteins and peptides had a positive effect on the remediating oxyfluorfen-polluted soils. Therefore, this study provides the use of a new biostimulant obtained from slaughterhouse sludge by enzymatic hydrolysis processes used in the bioremediation of a soil polluted by the oxyfluorfen herbicide.



中文翻译:

屠宰场污泥在氧氟草醚污染土壤的生物修复中的应用

使用有机物是科学家们高度接受的环境实践,用于污染土壤的生物修复。在这份手稿中,我们在实验室条件下研究了一种新的生物刺激剂的生物修复能力,该生物刺激剂从被氧氟草醚以 4 l ha -1的速率污染的土壤中的屠宰场污泥中获得(推荐的制造商费率)超过 90 天。我们确定了它对脱氢酶、脲酶、β-葡萄糖苷酶和磷酸酶活性、土壤微生物群落结构和土壤中除草剂进化的影响。可能是由于生物刺激剂中低分子量蛋白质的含量高,酶活性主要在实验开始时受到刺激。在氧氟草醚污染的土壤中,土壤生物学参数受到抑制。试验结束时,与对照土壤相比,氧氟草醚污染土壤中脱氢酶、脲酶、β-葡萄糖苷酶和磷酸酶活性显着降低47.8%、50.5%、36.4%和45.5%。在实验进行 5 天后,在氧氟草醚污染的土壤中使用生物刺激素降低了土壤酶活性和微生物群落抑制。在潜伏期结束时,受污染土壤中的氧氟草醚浓度下降了 60%,并用生物刺激剂进行了修正。这些结果表明,使用这种含有大量低分子量蛋白质和肽的生物刺激素对修复氧氟草醚污染的土壤具有积极作用。因此,本研究提供了通过酶水解工艺从屠宰场污泥中获得的新生物刺激剂的用途,用于生物修复被氧氟草醚除草剂污染的土壤。这些结果表明,使用这种含有大量低分子量蛋白质和肽的生物刺激素对修复氧氟草醚污染的土壤具有积极作用。因此,本研究提供了通过酶水解工艺从屠宰场污泥中获得的新生物刺激剂的用途,用于生物修复被氧氟草醚除草剂污染的土壤。这些结果表明,使用这种含有大量低分子量蛋白质和肽的生物刺激素对修复氧氟草醚污染的土壤具有积极作用。因此,本研究提供了通过酶水解工艺从屠宰场污泥中获得的新生物刺激剂的用途,用于生物修复被氧氟草醚除草剂污染的土壤。

更新日期:2021-06-25
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