Increased Agronomic and Environmental Value Provided by Biochars with Varied Physiochemical Properties Derived from Swine Manure Blended with Rice Straw
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- 作者：Zhongmin Dai ; Philip C. Brookes ; Yan He ; Jianming Xu
- 刊名：Journal of Agricultural and Food Chemistry
- 出版年：2014
- 出版时间：November 5, 2014
- 年：2014
- 卷：62
- 期：44
- 页码：10623-10631
- 全文大小：500K
- ISSN：1520-5118
文摘
To compensate for the shortcomings of manure biochar, an lignocellulose-based feedstock (rice straw) was added into manure-based feedstock (swine manure) at 3:1, 1:1, and 1:3 (w/w) manure/straw ratios during biochar production within the pyrolysis temperature ranging from 300 to 700 掳C. The results showed that the pyrolysis temperatures and the proportions of straw added both influenced the biochar properties. The overall properties of biochars at 300, 400, and 500 掳C were thoroughly different from those at 600 and 700 掳C by principal components analysis (PCA). The XRD, FTIR, and SEM spectra suggested that the addition of straw considerably changed the mineral crystals, functional groups, and porous structures in manure biochar, respectively. The Zn(II) adsorption batch experiments showed that the biochars with more proportions of manure had the largest Zn(II) adsorption capacity than other biochars at 300 掳C, which was attributed to the mineral components, oxygen functional groups, and surface areas. To meet varied agronomic and environmental requirements, the different conditions including pyrolysis temperatures and proportions of straw added should be quantitated.