Abstract
To develop a novel, low-cost adsorbent with natural material and industrial waste as raw materials, nanoscale manganese residue-derived FeS@starch-derived carbon (MR–FeS@SC) composite was prepared by the carbonization of starch–manganese residue gel. Manganese residue-derived FeS (MR–FeS) and starch-derived carbon (SC) were also prepared as contrasts for comparative studies. The MR–FeS@SC nanocomposite exhibited relatively large specific surface area and micropore volume, appropriate pore size, abundant functional groups, strong interaction between the functional groups of SC and MR–FeS, and the immobilization and uniform distribution of MR–FeS nanoparticles onto SC support material, which contributed to better adsorption properties for the removal of Safranine T (ST) from the aqueous solution compared with those of MR–FeS and SC. The adsorption could be conducted at a wide range of pH and temperature to achieve a satisfy removal efficiency of ST with MR–FeS@SC nanocomposite as adsorbent. The adsorption kinetics well followed the pseudo-second-order model, and the dominant mechanism was chemisorption. The adsorption behavior was well described by the Langmuir isotherm model. Due to the strong interaction between MR–FeS nanoparticles and SC support, MR–FeS@SC nanocomposite exhibited better reusability and stability even after fifteen cycles. This study provides a facile method of preparing effective and stable adsorbents for the treatment of dye wastewater.
Highlights
With the fast development of the industries, including textile, leather tanning, papermaking, plastic product manufacturing, coating, cosmetics, food processing, etc., synthetic dyestuffs are extensively used to color the products [1]
The main crystalline phases were identified as FeS, SiO2, Fe3O4, and CaSO4, indicating that the phase transition occurred in the calcination process of manganese residue
A stable Manganese residue-derived FeS (MR–FeS)@starch-derived carbon (SC) nanocomposite was successfully prepared with manganese residuIne saunmdmstaarrych, aasstraabwlemMaRte–rFiaeSls@
Summary
With the fast development of the industries, including textile, leather tanning, papermaking, plastic product manufacturing, coating, cosmetics, food processing, etc., synthetic dyestuffs are extensively used to color the products [1]. Low-cost adsorbents with using natural materials or the wastes/by-products generated from industries as raw materials have been developed as an alternative for current expensive adsorbents [8,10,11]. As nanoscale materials exhibit great potential for more effective treatment of the contaminants due to the properties including small particle size, large surface area, and high reactivity, the preparation of nanosized FeS is a significant study for enhancing its application performances [13,14]. Porous materials are considered as excellent supports for the dispersion of nanoparticles, especially porous biochar with abundant oxygen-containing functional groups prepared from the carbonization of natural organic materials (glucose, sucrose, cellulose, starch, agricultural wastes, etc.) [16,17]
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