Palygorskite/iron nanoparticles composite for the removal of in(III) from aqueous solutions: Characterization, performance, and mechanism

IF 5.3 2区地球科学 Q2 CHEMISTRY, PHYSICAL

Applied Clay Science Pub Date : 2024-12-27 DOI:10.1016/j.clay.2024.107678

Pan Zhang, Lu Tang, ChunYan Lang

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Abstract

Although indium and related derivatives are essential to the semiconductor communication sector, they are rather hazardous to the environment. A thermal-acid modified palygorskite supported nano-zero-valent iron composite (HA-PAL/nZVI) suitable for In(III) adsorption was prepared by a simple and rapid liquid-phase reduction method, and HA-PAL/nZVI was characterized by XRD, FT-IR, BET and SEM-EDS. The experimental results show that the saturated adsorption capacity of HA-PAL/nZVI for In(III) can reach 301.76 mg·g⁻¹ within 360 min under pH 3 and K 298.15. The adsorption process of In(III) conforms to the Langmuir isotherm model and the pseudo-second-order kinetic model, and ΔH = 10.04 kJ·mol⁻¹, ΔS = 90.80 J·mol⁻¹·K⁻¹, ΔG < 0, which belongs to the rate-controlling step, spontaneous and endothermic chemical adsorption; In addition to Cu²⁺ and PO₄³⁻, cations (Na⁺, K⁺, Ca²⁺, Mg²⁺, Sn⁴⁺, Pb²⁺, Zn²⁺, Cd²⁺), anions (Cl⁻, SO₄²⁻, NO₃⁻, CO₃⁻), organic molecules (H₂C₂O₄) and ionic strength showed significant tolerance to the adsorption of In(III) by HA-PAL/nZVI. Combined with XPS analysis results, it was determined that the HA-PAL/nZVI adsorption mechanism of In(III) was mainly based on redox, co-precipitation and physical adsorption.

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来源期刊

Applied Clay Science 地学-矿物学

CiteScore

10.30

自引率

10.70%

发文量

289

审稿时长

39 days

期刊介绍： Applied Clay Science aims to be an international journal attracting high quality scientific papers on clays and clay minerals, including research papers, reviews, and technical notes. The journal covers typical subjects of Fundamental and Applied Clay Science such as: • Synthesis and purification • Structural, crystallographic and mineralogical properties of clays and clay minerals • Thermal properties of clays and clay minerals • Physico-chemical properties including i) surface and interface properties; ii) thermodynamic properties; iii) mechanical properties • Interaction with water, with polar and apolar molecules • Colloidal properties and rheology • Adsorption, Intercalation, Ionic exchange • Genesis and deposits of clay minerals • Geology and geochemistry of clays • Modification of clays and clay minerals properties by thermal and physical treatments • Modification by chemical treatments with organic and inorganic molecules(organoclays, pillared clays) • Modification by biological microorganisms. etc...