The dissolved organic matter from the co-decomposition of Chinese milk vetch and rice straw induces the strengthening of Cd remediation by Fe-modified biochar

Biochar, Journal Year: 2024, Volume and Issue: 6(1)

Published: March 25, 2024

Abstract Fe-modified biochar (FB) and co-using Chinese milk vetch rice straw (MR) are two effective ways for mitigating the cadmium (Cd) contamination in paddy fields southern China. Nevertheless, effects of FB combined with MR on Cd passivation mechanism remain unclear. In current study, strengthening induced by were found mechanisms extracted dissolved organic matter (DOM) from co-decomposition alleviation investigated through pot experiment adsorption experiment. Pot demonstrated that co-incorporating decreased available 23.1% increased iron plaque concentration 11.8%, resulting a 34.7% reduction concentrations brown compared addition FB. Furthermore, improved nutrients soil. The molecular characteristics DOM derived decomposition (DOM-MR) analyzed fluorescence excitation emission matrix spectroscopy-parallel factor analysis (EEM-PARAFAC) Fourier transform-ion cyclotron resonance mass spectrometry (FT-ICR MS). Results showed lignin/carboxylic-rich alicyclic molecules protein/amino sugar main compounds, potentially involved binding. Adsorption experiments revealed DOM-MR functional groups, specific surface area, negative charges FB, inducing both physisorption chemisorption Cd(II). maximum capacity after adding was 634 mg g −1 , 1.30 times without DOM-MR. This study suggested MR, could serve as an innovative practice simultaneous remediation soil fertilization Cd-polluted fields. It also provided valuable insights basis optimize performances enhance its potential immobilization. Graphical

Language: Английский

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Enhanced Cd adsorption by red mud modified bean-worm skin biochars in weakly alkali environment

Separation and Purification Technology, Journal Year: 2022, Volume and Issue: 297, P. 121533 - 121533

Published: June 18, 2022

Language: Английский

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In situ preparation of a multifunctional adsorbent by optimizing the Fe2+/Fe3+/Mn2+/HA ratio for simultaneous and efficient removal of Cd(II), Pb(II), Cu(II), Zn(II), As(III), Sb(III), As(V) and Sb(V) from aqueous environment: Behaviors and mechanisms

Journal of Hazardous Materials, Journal Year: 2022, Volume and Issue: 444, P. 130389 - 130389

Published: Nov. 11, 2022

Language: Английский

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Efficient Adsorption Capacity of MgFe-Layered Double Hydroxide Loaded on Pomelo Peel Biochar for Cd (II) from Aqueous Solutions: Adsorption Behaviour and Mechanism

Molecules, Journal Year: 2023, Volume and Issue: 28(11), P. 4538 - 4538

Published: June 3, 2023

A novel pomelo peel biochar/MgFe-layered double hydroxide composite (PPBC/MgFe-LDH) was synthesised using a facile coprecipitation approach and applied to remove cadmium ions (Cd (II)). The adsorption isotherm demonstrated that the Cd (II) by PPBC/MgFe-LDH fit Langmuir model well, behaviour monolayer chemisorption. maximum capacity of determined be 448.961 (±12.3) mg·g-1 from model, which close actual experimental 448.302 (±1.41) mg·g-1. results also chemical controlled rate reaction in process PPBC/MgFe-LDH. Piecewise fitting intra-particle diffusion revealed multi-linearity during process. Through associative characterization analysis, mechanism involved (i) formation or carbonate precipitation; (ii) an isomorphic substitution Fe (III) (II); (iii) surface complexation functional groups (-OH); (iv) electrostatic attraction. great potential for removing wastewater, with advantages synthesis excellent capacity.

Language: Английский

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Enhancing sorption of layered double hydroxide-based magnetic biochar for arsenic and cadmium through optimized preparation protocols

Bioresource Technology, Journal Year: 2023, Volume and Issue: 388, P. 129756 - 129756

Published: Sept. 9, 2023

Language: Английский

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