Phosphate Removal by Surface-Modified Ceramsite Derived from the Synergistic Use of Multiple Solid Wastes
Jiayan Dang, Teng Wang, Yang Liu, Jiawei Hu, Siwei Liu, Yongjie Xue
TL;DR
This study creates a new method to remove phosphate pollution using waste materials and a modified ceramic material, offering a sustainable solution.
Contribution
A novel 'waste-to-waste' strategy is introduced, using industrial solid wastes to create a high-performance phosphate adsorbent.
Findings
BC@La achieved a maximum phosphate adsorption capacity of 2.56 mg/g under optimal conditions.
Adsorption followed pseudo-second-order kinetics and Langmuir isotherm, indicating monolayer chemisorption.
The primary mechanism was identified as lanthanum phosphate (LaPO4) precipitation.
Abstract
To address the dual challenges of aqueous phosphate pollution and the resource utilization of petrochemical solid wastes, this study proposes a novel closed-loop “waste-to-waste” strategy. This approach innovatively integrates multiple solid wastes (including oily sludge and petroleum hydrocarbon-contaminated soil) into a porous ceramic matrix and utilizes lanthanum recovered from spent catalysts for surface modification, successfully fabricating an optimized adsorbent—lanthanum-modified ceramsite (BC@La). Under the conditions of pH 6, an adsorbent dosage of 1 g/L, and a temperature of 318 K, BC@La achieved a maximum phosphate adsorption capacity of 2.56 mg/g, corresponding to 128.0 mg of phosphorus per gram of La. Kinetic and isotherm analyses revealed that the adsorption process followed the pseudo-second-order model and fitted well with the Langmuir isotherm, consistent with…
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Taxonomy
TopicsPhosphorus and nutrient management · Layered Double Hydroxides Synthesis and Applications · Recycling and utilization of industrial and municipal waste in materials production