期刊
ENVIRONMENTAL POLLUTANTS AND BIOAVAILABILITY
卷 35, 期 1, 页码 -出版社
TAYLOR & FRANCIS LTD
DOI: 10.1080/26395940.2023.2288877
关键词
Dental wastewater; adsorption; environmental waste; lead; chromium
An environmental waste-based biochar made from eggshell and fly ash was used to adsorb lead and chromium in dental wastewater, resulting in improved removal efficiency. A theoretical calculation model accurately predicted the effluent concentration and was validated by experimental results, demonstrating the success of this innovative adsorption process.
Heavy metals from dental wastewater raised serious environmental health concerns. To address this, an environmental waste-based biochar by eggshell and fly ash was synthesized and characterized. The adsorption characteristics of lead and chromium by biochar were explored and a novel alternative stepwise adsorption process was proposed to improve the removal efficiency. Results indicated that the specific surface area was determined to be 537.6 m2/g. The maximum adsorption capacity for lead and chromium were 149.3 mg/g and 119.0 mg/g, respectively. A theoretical calculation model was developed to predict the concentration of the effluent, followed by experimental validation. The findings indicated that the concentrations of lead and chromium in the effluent remained stable, while the average removal efficiency of lead and chromium increased by 5.56% and 7.02%, respectively, compared to the conventional adsorption method. The calculated values aligned well with the experimental results, demonstrating the success of this innovative adsorption process.
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