The regulating effects and mechanism of biochar and maifanite on copper and cadmium in a polluted soil-Lolium perenne L. system
| Autor: | Yuan Ding, Weiya Wang, Shiying Ao |
|---|---|
| Jazyk: | angličtina |
| Rok vydání: | 2021 |
| Předmět: |
Amendment
Iron oxide chemistry.chemical_element Soil Science Plant Science Lolium perenne General Biochemistry Genetics and Molecular Biology Cd chemistry.chemical_compound Immobilization Maifanite Biochar Cu Cadmium biology Chemistry General Neuroscience General Medicine biology.organism_classification Copper Soil conditioner Environmental chemistry Soil colloid Medicine General Agricultural and Biological Sciences Clay minerals Dregs Biochar Environmental Sciences Environmental Contamination and Remediation |
| Zdroj: | PeerJ, Vol 9, p e11921 (2021) PeerJ |
| ISSN: | 2167-8359 |
| Popis: | Arable land polluted by copper (Cu) and cadmium (Cd) is a widespread problem. The use of biochar and/or clay mineral as a soil amendment can effectively solidify heavy metals in the soil. We applied biochar (BC), iron modified biochar (Fe-BC), maifanite (MF, a kind of clay minerals), a combination of BC with MF (BC:MF), and Fe-BC with MF (Fe-BC:MF) at a 2 wt % dose as soil amendments to study their ability to prevent Cu and Cd from accumulating in ryegrass (Lolium perenne L.). We found that after 90 days of cultivation, the Cd and Cu content both significantly decreased in ryegrass shoots from 2.06 and 209.3 mg kg−1 (control) to 1.44–2.01 and 51.50–70.92 mg kg−1, respectively, across treatments (p P p > 0.05). Our adsorption balance experiment showed that BC, Fe-BC, and MF physically and chemically adsorbed Cd and Cu by complexation with functional groups (mesoporous nanomaterials) whose porosity measurements ranged from 0.68 to 78.57 m2 g−1. Furthermore, the amorphous crystalline iron oxide binding Cd and Cu was the key to immobilizing these metals in the soil. The amendments applied in our study show promise for enhancing immobilization of Cu and Cd in contaminated paddy soils. |
| Databáze: | OpenAIRE |
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