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Effects of Green Waste Compost Addition to Dredged Sediments of the Matanza-Riachuelo River (Argentina) on Heavy Metal Extractability and Bioaccumulation in Lettuce ( Lactuca sativa )
Water, Air, & Soil Pollution ( IF 2.9 ) Pub Date : 2021-05-05 , DOI: 10.1007/s11270-021-05161-9
Luis Ignacio do Carmo , Amalia Lara Bursztyn Fuentes , Alejandra de los Ríos , Alicia Fabrizio de Iorio , Alicia Elena Rendina

Soil amendments can be an effective and low-cost treatment to reduce metal bioavailability of contaminated dredged sediments disposed on land. The effect of green waste compost addition on Cu, Cr, Ni, Pb, and Zn extractability and bioaccumulation in lettuce was studied in a greenhouse experiment, using dredged sediments from different sites of the Matanza-Riachuelo River (Argentina). Moreover, the effect of compost addition in lettuce morphological and biochemical variables was analyzed. The treatments were prepared by adding 15% and 30% of compost to the sediments (w/w), and untreated sediments were used as controls. Metal concentrations in lettuce shoots and metals extracted by DTPA correlated significantly. In the site where the land use is mainly agriculture and cattle grazing, compost addition did not affect the accumulation of metals in lettuce. Conversely, in site where the land use is peri-urban and industrial, compost addition decreased Cr, Ni, Pb, and Zn concentrations in lettuce, similar for both treatments. In particular, in the basin’s more industrialized and densely populated site, the addition of 30% compost to the sediment was more effective in reducing the metals bioaccumulation and improving morphological variables and chlorophyll content in lettuce shoots. The results presented in this study show that the addition of soil amendments, particularly of 30% of green waste compost, can improve the physicochemical properties enabling, for instance, a controlled disposal scheme.



中文翻译:

添加绿色废物堆肥的马坦萨-里亚霍埃洛河(阿根廷)疏ged的沉积物对莴苣(莴苣)中重金属的提取能力和生物累积的影响

土壤改良剂可以是一种有效且低成本的处理方法,可以减少土地上被污染的疏ged沉积物的金属生物利用度。在温室实验中,使用来自马坦萨-里亚霍埃洛河(阿根廷)不同地点的疏sediment沉积物,研究了添加绿色废物堆肥对莴苣中铜,铬,镍,铅和锌的提取能力和生物积累的影响。此外,分析了堆肥添加对生菜形态和生化变量的影响。通过将15%和30%的堆肥添加到沉淀物中(w / w)来制备处理剂,未处理的沉淀物用作对照。生菜芽中的金属浓度与DTPA提取的金属之间存在显着相关性。在土地使用主要是农业和放牧的地方,添加堆肥不会影响生菜中金属的积累。相反,在城市周边和工业用地的土地上,堆肥的添加降低了莴苣中的Cr,Ni,Pb和Zn浓度,这两种处理都相似。特别是,在该盆地工业化程度更高和人口稠密的地区,向沉积物中添加30%的堆肥可更有效地减少金属生物积累并改善生菜芽中的形态变量和叶绿素含量。这项研究提出的结果表明,添加土壤改良剂,尤其是添加30%的绿色废物堆肥,可以改善理化特性,从而实现例如可控的处置方案。和生菜中的锌浓度,两种处理方法相似。特别是,在该盆地工业化程度更高和人口稠密的地区,向沉积物中添加30%的堆肥可更有效地减少金属生物积累并改善生菜芽中的形态变量和叶绿素含量。这项研究提出的结果表明,添加土壤改良剂,尤其是添加30%的绿色废物堆肥,可以改善理化特性,从而实现例如可控的处置方案。和生菜中的锌浓度,两种处理方法相似。特别是,在该盆地工业化程度更高和人口稠密的地区,向沉积物中添加30%的堆肥可更有效地减少金属生物积累并改善生菜芽中的形态变量和叶绿素含量。这项研究提出的结果表明,添加土壤改良剂,尤其是添加30%的绿色废物堆肥,可以改善理化特性,从而实现例如可控的处置方案。

更新日期:2021-05-06
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