期刊
WATER RESEARCH
卷 100, 期 -, 页码 439-447出版社
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.watres.2016.05.029
关键词
Sewage sludge; Pyrolysis; Hydrothermal carbonization (HTC); Phosphorus (P); Chemical extraction; X-ray absorption spectroscopy (XAS)
资金
- American Chemical Society [54143-DNI5]
- National Science Foundation [1559087]
- Division Of Ocean Sciences
- Directorate For Geosciences [1559124, 1559087] Funding Source: National Science Foundation
(Hydro)thermal treatments of sewage sludge is a promising option that can simultaneously target safe waste disposal, energy recovery, and nutrient recovery/recycling. The speciation of phosphorus (P) in sludge is of great relevance to P reclamation/recycling and soil application of sludge-derived products, thus it is critical to understand the effects of different treatment techniques and conditions on P speciation. This study systematically characterized P speciation (i.e. complexation and mineral forms) in chars derived from pyrolysis and hydrothermal carbonization (HTC) of municipal sewage sludges. Combined sequential extraction and P K-edge X-ray absorption near edge structure (XANES) spectroscopy analysis revealed the dependence of P transformation on treatment conditions and metal composition in the feedstocks. Pyrolysis of sludges decreased the relative abundance of phytic acid while increased the abundance of Al-associated P. HTC thoroughly homogenized and exposed P for interaction with various metals/minerals, with the final P speciation closely related to the composition/speciation of metals and their affinities to P. Results from this study revealed the mechanisms of P transformation during (hydro)thermal treatments of sewage sludges, and might be applicable to other biosolids. It also provided fundamental knowledge basis for the design and selection of waste management strategies for better P (re)cycling and reclamation. (c) 2016 Elsevier Ltd.
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据