• 主题
高级搜索  >
历史搜索 清空历史
首页> 外文期刊>RSC Advances >Vermicomposting of coal fly ash using epigeic and epi-endogeic earthworm species: nutrient dynamics and metal remediation
【24h】

Vermicomposting of coal fly ash using epigeic and epi-endogeic earthworm species: nutrient dynamics and metal remediation

机译：利用表生和表生ge物种对粉煤灰进行mi堆肥：营养动态和金属修复

获取原文
           
页面导航
  • 摘要
  • 著录项
  • 相似文献
  • 相关主题

摘要

Huge amounts of coal fly ash (FA), produced during power generation, has led to several environmental problems associated with metal pollution and the burden of its disposal. Vermicomposting has emerged as a cost-effective technique in suitable management of FA. Two epigeic earthworm species: Eisenia fetida, and Eudrilus eugeniae and one epi-endogeic species: Lumbricus rubellus were selected for vermiremediation of coal FA. The investigation addresses the changes in the earthworm biomass, number, nutrient content and metal content in the treatments of FA amended with cow-dung (CD) at periodical intervals of vermicomposting. Metal (Cr, Cu, Cd, Zn, Ni and Pb) removal efficiency of the three earthworm species has been observed. Bioaccumulation factor (BAF) and changes in the microbiological fauna of the different mixtures were also witnessed. Earthworm and cocoon count showed an increase in trend with duration of vermicomposting. The concentration of total nitrogen, phosphorous and potassium increased in all the treatments. The maximum bacterial count (8.0 × 105 CFU g?1) and fungal count (3.8 × 103 CFU g?1) were observed in FA + CD (1?:?3) mixture, comprising E. eugeniae. Significant reduction (p < 0.05) in the metal concentration of the treatments along with subsequent increase in metal content of earthworm tissues using Flame Atomic Absorption Spectrophotometer was observed. The treatment FA + CD (1?:?3) gave the best results in terms of nutrient enhancement and metal removal. Maximum metal reduction in the treatment, FA + CD (1?:?3) was 58.82% for Cr by E. fetida, 71.94% for Ni by E. eugeniae, and 51.67% for Cu by L. rubellus. Highest BAF value was obtained for Ni (3.31) in E. eugeniae driven treatment FA + CD (1?:?3). The maximum metallothionein production was observed in E. eugeniae followed by E. fetida and L. rubellus.
机译：发电过程中产生的大量粉煤灰（FA）导致了一些与金属污染及其处置负担相关的环境问题。 Vermicomposting已成为FA适当管理中的一种经济高效的技术。选择了两种表皮earth物种：埃特尼亚fetida 和 Eudrilus eugeniae ，以及一种表皮内生物种 Lumbricus rubellus 进行煤FA的修复。该研究探讨了定期ver粪后用牛粪（CD）改良的FA处理中worm生物量，数量，养分含量和金属含量的变化。已经观察到三种earth的金属（Cr，Cu，Cd，Zn，Ni和Pb）去除效率。还观察到了生物富集因子（BAF）和不同混合物的微生物区系变化。 ver和茧数随着ver涂持续时间的增加而增加。在所有处理中，总氮，磷和钾的浓度均增加。最大细菌数（8.0×10 5 CFU g ？1 ）和真菌数（3.8×10 <在FA + CD（1？：？3）混合物中观察到small> 3 CFU g ？1 ）， em> E。紫红色。使用火焰原子吸收分光光度计观察到处理金属浓度显着降低（ p <0.05），随后subsequent组织金属含量增加。 FA + CD（1？：？3）处理在增强营养和去除金属方面效果最好。用Eem法测得，Cr的最大金属还原率FA + CD（1？：？3）为58.82％。 fetida ， E对Ni的贡献率为71.94％。 ， L的铜含量为51.67％。风信子。在E中，Ni（3.31）的BAF值最高。洋紫菜驱动的FA + CD（1？：？3）。在 E中观察到最大的金属硫蛋白产量。 eugeniae ，然后是 E。 fetida 和 L。风信子。

著录项

相似文献

  • 外文文献
  • 中文文献
  • 专利
获取原文

客服邮箱：kefu@zhangqiaokeyan.com

京公网安备：11010802029741号 ICP备案号：京ICP备15016152号-6 六维联合信息科技 (北京) 有限公司©版权所有

  • 客服微信

  • 服务号