• 关键词：生物质原料  生物质炭  可溶性有机质组分  荧光光谱  平行因子分析

• 基金项目：国家自然科学基金项目（No.42077148）；国家重点研发计划项目（No.2016YFD0800306）

• 施暖暖
• 南京农业大学资源与环境科学学院，农业资源与生态环境研究所，江苏省有机固体废弃物资源化协同创新中心，南京 210095

• 李婉秋
• 南京农业大学资源与环境科学学院，农业资源与生态环境研究所，江苏省有机固体废弃物资源化协同创新中心，南京 210095

• Marios Drosos
• 南京农业大学资源与环境科学学院，农业资源与生态环境研究所，江苏省有机固体废弃物资源化协同创新中心，南京 210095

• 罗红梅
• 米易县农业农村局，米易 617213

• 李恋卿
• 南京农业大学资源与环境科学学院，农业资源与生态环境研究所，江苏省有机固体废弃物资源化协同创新中心，南京 210095

• 潘根兴
• 南京农业大学资源与环境科学学院，农业资源与生态环境研究所，江苏省有机固体废弃物资源化协同创新中心，南京 210095

• 摘要：不同原料的生物质炭DOM含量和组分存在差异，选取水稻秸秆（RS）、小麦秸秆（WS）、大豆秸秆（SS）、油菜秸秆（YS）、花生壳（PH）、松木屑（PW）和竹粉（BS）7种生物质原料在450 ℃下制备的生物质炭，采用紫外-可见光光谱（UV-vis）、荧光光谱（EEM）结合平行因子分析（PARAFAC）技术对生物质炭中DOM的光谱特征和荧光组分进行表征.结果表明：木本类生物质炭的DOM含量较秸秆类生物质炭低，分子量较高.从生物质炭DOM中鉴定分离可见区类富里酸组分（C1）、较短波长类腐殖酸组分（C2）、较长波长类腐殖酸组分（C3）和类蛋白质组分（C4）等4种组分.不同原料生物质炭DOM各组分的最大荧光强度（F_max）值表现为C1 ＞ C2 ＞ C3 、C4，秸秆类炭DOM各组分的F_max值显著高于木本类.生物质炭DOM中以C1组分占主导地位，占比达48.87% ~ 79.97%.C2、C3组分在YSB、SSB-DOM中占比最高，分别达32.71%和23.25% ，仅在YSB和PHB-DOM中发现少量C4组分.木本类原料的有机和无机矿物含量远低于秸秆类，原料中纤维素含量与生物质炭DOM总量及其C3组分呈显著的正相关关系， Ca含量与生物质炭的DOM含量及其F_max值和C3组分呈显著正相关，说明不同生物质原料的组成对生物质炭DOM组成特性具有显著的影响，研究结果为全面评估不同原料生物质炭DOM的环境效应提供重要的科学理论依据.

• Abstract：DOM content and composition of biochar are varied with from different raw materials. In this study， seven feedstocks including rice straw （RS）， wheat straw （WS）， soybean straw （SS）， rape straw （YS）， peanut husk （PH）， pine wood （PW） and bamboo powder （BS） were selected to prepare biochar at 450 ℃ by calcination. The spectral characteristics and fluorescence components of DOM in biochar were characterized by ultraviolet-visible spectrum （UV-vis） and EEM fluorescence spectroscopy combined with PARAFAC. Results showed that the DOM content of woody biochar was lower than that of straw biochar， and the molecular weight of woody biochar was higher than that of straw biochar. Four components were identified and separated from the DOM derived from biochar， which were visible region fulvic acid component （C1）， shorter wavelength humic acid component （C2）， longer wavelength humic acid component （C3） and protein component （C4）. The maximum fluorescence intensity （F_max） values of various components of biochar DOM derived from different raw materials were C1 > C2 > C3， C4， and the F_max values of various components of straw DOM were significantly higher than those of woody DOM. C1 component accounted for 48.87%~79.97% of the DOM derived from biochar， which was the dominant component. C2 and C3 components accounted for the highest proportion in YSB and SSB-DOM， reaching up to 32.71% and 23.25%， respectively. Only a small amount of C4 component were found in YSB and PHB-DOM. The organic and inorganic mineral contents of woody raw materials were much lower than those of straw. The cellulose content in raw materials was significantly positively correlated with the total DOM content of biochar and C3 component， and the Ca content was significantly positively correlated with DOM content of biochar and its F_max value and C3 component. The results indicated that the composition of different biomass raw materials had significant impacts on the composition characteristics of DOM derived from biochar. The results provide an important scientific theoretical basis for comprehensive evaluation of DOM effect of the biomass derived from biochar.

• Key words：biomass raw materials  biochar  dissolved organic matter component  fluorescence spectra  parallel factor analysis

• 
  摘要点击次数： 155 全文下载次数： 194