title: Increased agronomic and environmental value provided by biochars with varied physiochemical properties derived from swine manure blended with rice straw.
abstract: 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 °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 °C were thoroughly different from those at 600 and 700 °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 °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.
authors.affiliation: Institute of Soil and Water Resources and Environmental Science, Zhejiang Provincial Key Laboratory of Subtropical Soil and Plant Nutrition, Zhejiang University , Hangzhou 310058, China.
authors.forename: Zhongmin
authors.initials: Z
authors.lastname: Dai
authors.forename: Philip C
authors.initials: PC
authors.lastname: Brookes
authors.forename: Yan
authors.initials: Y
authors.lastname: He
authors.forename: Jianming
authors.initials: J
authors.lastname: Xu
mesh_terms: D000327:Adsorption; D000818:Animals; D002606:Charcoal / Q000737:chemistry*; D052918:Environmental Restoration and Remediation / Q000295:instrumentation*; D005308:Fertilizers / Q000032:analysis*; D008372:Manure / Q000032:analysis*; D019216:Metals, Heavy; D012275:Oryza / Q000737:chemistry*; D018547:Plant Stems / Q000737:chemistry*; D013552:Swine; D013696:Temperature
chemical_list: D005308:Fertilizers; D008372:Manure; D019216:Metals, Heavy; C540010:biochar; D002606:Charcoal
keywords: Zn(II) adsorption; agronomic and environmental value; feedstock blending biochar; rice straw; swine manure