AI Article Synopsis
- The paper discusses the conversion of oily sludge into a sludge-based adsorbent (S-AB) through chemical activation, utilizing both oily sludge and discarded sawdust.
- The most effective chemical activator identified was ZnCl, leading to an adsorbent with a higher mesopore surface area, which enhances its ability to adsorb raw petroleum.
- Optimization of the preparation conditions resulted in a maximum adsorption capacity of 434.78 mg/g, with second-order kinetics fitting the adsorption process effectively.
Article Abstract
Sludge-based adsorbent (S-AB) converted by oily sludge can make full use of the precious resource. In this paper, oily sludge and discarded sawdust are used to prepare adsorbent through chemical activation. The adsorbent prepared is used to adsorb raw petroleum. Firstly, the most reasonable chemical activator ZnCl is ascertained through parallel comparative experiments. The characterization results of N-adsorption are consistent with adsorption experiment results, which shows that higher mesopore surface area and volume are benefitted by the adsorption process. Secondly, the optimization of preparation technology is investigated through orthogonal experiments after parallel comparative experiments. The adsorption capacity of S-AB-ZnCl is stronger when the preparation conditions are as follows: an activation temperature of 550°C, an activation time of 3.5 h, a solid-liquid ratio of 1:1.5, a sludge-sawdust ratio of 1:0.5 and the heating rate of 15°C/min. The maximum quantity adsorbed = 434.78 mg/g, calculated through the Langmuir adsorption isothermal models, of S-AB-ZnCl prepared under optimized condition is higher than that before optimization. In addition, the most reasonable kinetics fits were of the second-order model.
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| http://dx.doi.org/10.1080/09593330.2020.1725138 | DOI Listing |
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