Metal(loid) oxides and metal sulfides nanomaterials reduced heavy metals uptake in soil cultivated cucumber plants. (December 2019)

• Record Type: Journal Article
• Authors: Song, Chun; Ye, Fang; Zhang, Huiling; Hong, Jie; Hua, Chenyu; Wang, Bin; Chen, Yanshan; Ji, Rong; Zhao, Lijuan
• Is Part Of: Environmental pollution. Volume 255(2019)Part 3
• Publication Date: 2019-12
• Subjects: Contaminated soil -- Nanomaterials -- Heavy metals -- Mineral nutrients -- Cucumber; Pollution -- Periodicals; Pollution -- Environmental aspects -- Periodicals; Environmental Pollution -- Periodicals; Pollution -- Périodiques; Pollution -- Aspect de l'environnement -- Périodiques; Pollution -- Effets physiologiques -- Périodiques; Pollution; Pollution -- Environmental aspects; Periodicals; Electronic journals; 363.73
• DOI: 10.1016/j.envpol.2019.113354
• Languages: English
• ISSNs: 0269-7491

Abstract

Abstract: Agricultural soil is one of the main sink for both heavy metals and nanomaterials (NMs). Whether NMs can impact heavy metals uptake or bioaccumulation in plants is unknown. Here, cucumber plants were cultivated in a multi-heavy metals contaminated soil amended with four types of NMs (SiO2, TiO2, ZnS and MoS2 ) separately for four weeks. Physiological and biochemical parameters were determined to investigate the impact of NMs on plant growth. Inductively coupled plasma mass spectrometry was employed to determine the metal content in plants. Results showed that none of the tested NMs impacted plants biomass, but all the NMs showed different degrees of reduction in heavy metals bioaccumulation in plant roots, stems and leaves. However, four NMs showed different degrees of reduction in macro and micro nutrients uptake. MoS2 decreased the bioaccumulation of heavy metals (As, Cd, Cr, Cu, Ni, Al, Ti and Pb) for 36.4–60.6% and nutrients (Mg, Fe, K, Si and Mn) for 40.1%–50.1% in roots. Exposure to MoS2 NMs also significantly increased 23.4% of Si in leaves, 205.6% and 83.9% of Mo in roots and stems, respectively. In general, the results of this study showed promising potential for NMs to reduce uptake of heavy metals in crop plants, especially MoS2 NMs. However, the negative impacts of perturbing nutrients uptake should be paid attention as well. Graphical abstract: Image 1035 Highlights: Metal(loid) Oxides and Sulfides nanomaterials reduced the uptake and bioaccumulation of heavy metals in cucumber plants. NMs also inhibited the uptake of macro and micro nutrients in cucumber plants. Photosynthetic pigment contents were decreased by metal sulfides NMs. MoS2 NMs increased Si in cucumber leaves and Mo in cucumber roots and stems.