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Updated: Feb 8, 2026
10:31
Assessment of Waste-Derived Biochars on the Health and Biological Activity of Soil
Published on: October 10, 2025
653
[Preparation of Adsorption Ceramsite Derived from Sludge Biochar]
Jie Li1,2, Lan-Jia Pan1,2, Guang-Wei Yu1
1Key Laboratory of Urban Pollutant Conversion, Institute of Urban Environment, Chinese Academy of Sciences, Xiamen 361021, China.
Huan Jing Ke Xue= Huanjing Kexue
|July 3, 2018
Summary
This study developed adsorption ceramsite (SKC) from biochar and kaolin to remove ciprofloxacin (CIP) from water, achieving 65.34% removal efficiency. The material shows low heavy metal leaching, indicating safe use for wastewater treatment.
Area of Science:
- Environmental Science
- Materials Science
- Chemical Engineering
Background:
- Municipal sludge-derived biochar (BC) presents a sustainable resource for adsorbent development.
- Ciprofloxacin (CIP) is a persistent pharmaceutical pollutant in aquatic environments.
- Developing cost-effective and safe adsorbents is crucial for wastewater remediation.
Purpose of the Study:
- To synthesize and characterize adsorption ceramsite (SKC) using biochar (BC) and kaolin (KL).
- To investigate the adsorption mechanism of CIP onto SKC.
- To evaluate the ecotoxicological risk of the synthesized material.
Main Methods:
- SKC was prepared using optimized parameters: 60% BC, 40% KL, calcined at 1,050°C for 5 min.
- Adsorption kinetics, isotherm models, microstructure, pore structure, phase composition, and zeta potential were analyzed.
- Heavy metal leaching toxicity was assessed using the Toxicity Characteristic Leaching Procedure (TCLP).
Main Results:
- SKC demonstrated a high CIP removal efficiency of 65.34%.
- Adsorption followed pseudo-second-order kinetics and was well-described by the Freundlich model, indicating multilayer adsorption.
- SKC exhibited significantly lower heavy metal leaching compared to BC, with low ecotoxicological risk.
Conclusions:
- SKC is an effective, low-cost, and recyclable adsorbent for removing CIP from wastewater.
- The material's porosity and mineral phases (silicon aluminum oxide, iron oxide) facilitate CIP adsorption.
- This research offers a viable pathway for the safe, large-scale utilization of BC in environmental applications.
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