Study on the removal of Cd from dewatered sludge by combined extraction agents: Peel extract and compound chemical extraction agent
| Autor: | Hanyu Li, Shuai Jiao, Lili Tian, Yujun Wang, Fei Li |
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| Jazyk: | angličtina |
| Rok vydání: | 2024 |
| Předmět: | |
| Zdroj: | Food Chemistry: X, Vol 23, Iss , Pp 101760- (2024) |
| Druh dokumentu: | article |
| ISSN: | 2590-1575 69458006 |
| DOI: | 10.1016/j.fochx.2024.101760 |
| Popis: | The recycling of fruit peel resources is a current research hotspot. This study screened and configured a composite extractant consisting of peel and chemical extractant through extraction experiments and explored the heavy metals(HMs) release effect. The results showed that citrus reticulata(CR), citrullus lanatus (CL), 0.16 mol·L−1 nitrilotriacetic acid(NTA) with 0.04 mol·L−1 oxalic acid(NO5), and 0.12 mol·L−1NTA with 0.08 mol·L−1tartaric acid(NT4) had the strongest extraction ability. After the cross-combination was optimized, CR-NO5 (1:50, 6 h, 35 °C) and CL-NT4 (1:50, 36 h, 45 °C) had the highest extraction rates for Cd and Zn, which were 92.6 % and 98.4 %, respectively. The CL series increased the nutrient content of sludge (157.75–177.88 g·kg−1). The four combined extractants increased the proportion of soluble components of HMs in sludge (14–36 %). Therefore, the combined leaching agent will provide a valuable reference for the harmless treatment of HMs in sludge and the resource utilization of peel waste. |
| Databáze: | Directory of Open Access Journals |
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