Cadar Oana, Stupar Zamfira, Senila Marin, Levei Levente, Moldovan Ana, Becze Anca, Ozunu Alexandru, Levei Erika Andrea
INCDO-INOE 2000, Research Institute for Analytical Instrumentation, 67 Donath Street, 400293 Cluj-Napoca, Romania.
Faculty of Environmental Sciences and Engineering, Babes-Bolyai University, 30 Fantanele Street, 400294 Cluj-Napoca, Romania.
Materials (Basel). 2022 Aug 17;15(16):5657. doi: 10.3390/ma15165657.
The ability of natural zeolite amendment to reduce the uptake of potentially toxic elements (PTEs) by lettuce, spinach and parsley was evaluated using pot experiments. PTE concentrations in roots and shoots, as well as the pseudo total (PT), water soluble (WS) and bioavailable (BA) PTE fractions in the amended soils, were assessed. Although the PT PTE concentration was high, the WS fraction was very low (<0.4%), while the BA fraction varied widely (<5% for Cr, Mn and Co, <15% for Ni, Pb and Zn, >20% for Cd and Cu). PTE concentration decreased in both roots and shoots of all leafy vegetables grown on zeolite amended soils, especially at high amendment dose (10%). The uptake of PTEs mainly depended on plant species, PTE type and amendment dose. With the exception of Zn in spinach, the bioaccumulation factor for roots was higher than for shoots. Generally, lettuce displayed the highest PTE bioaccumulation capacity, followed by spinach and parsley. Except for Zn in spinach, the transfer factors were below 1 for all PTEs, all plant species and all amendment doses. Our results showed that the natural zeolites are promising candidates in the reclamation of contaminated soils due to their ability to immobilize PTEs.
通过盆栽试验评估了天然沸石改良剂降低生菜、菠菜和欧芹对潜在有毒元素（PTEs）吸收的能力。评估了改良土壤中根和地上部分的PTE浓度，以及伪总量（PT）、水溶性（WS）和生物可利用（BA）的PTE组分。尽管PT PTE浓度很高，但WS组分非常低（<0.4%），而BA组分差异很大（Cr、Mn和Co<5%，Ni、Pb和Zn<15%，Cd和Cu>20%）。在沸石改良土壤上种植的所有叶菜类蔬菜的根和地上部分中，PTE浓度均降低，尤其是在高改良剂量（10%）时。PTE的吸收主要取决于植物种类、PTE类型和改良剂量。除菠菜中的锌外，根的生物累积系数高于地上部分。一般来说，生菜表现出最高的PTE生物累积能力，其次是菠菜和欧芹。除菠菜中的锌外，所有PTE、所有植物种类和所有改良剂量的转移系数均低于1。我们的结果表明，天然沸石因其固定PTE的能力而有望成为污染土壤修复的候选材料。
