不同制备条件下油菜秸秆生物炭用作缓释载体的综合评价  

Comprehensive evaluation of rape straw biochar as slow-release carrier under different preparation conditions

作　　者：徐洋 任奕林[1] 王浩杰 黄秋航 邢博源 曹红亮[2] XU Yang;REN Yilin;WANG Haojie;HUANG Qiuhang;XING Boyuan;CAO Hongliang(Key Laboratory of Agricultural Equipment in Mid-Lower Yangtze River,Ministry of Agriculture and Rural Affairs,College of Engineering,Ministry of Agriculture and Rural Affairs,Huazhong Agricultural University,Wuhan 430070,China;Key Laboratory of Smart Farming for Agricultural Animals,Ministry of Agriculture and Rural Affairs,Huazhong Agricultural University,Wuhan 430070,China)

机构地区：[1]华中农业大学工学院,农业农村部长江中下游农业装备重点实验室,湖北武汉430070 [2]华中农业大学、农业农村部智慧养殖技术重点实验室,湖北武汉430070

出　　处：《浙江农业学报》2023年第4期893-902,共10页Acta Agriculturae Zhejiangensis

基　　金：国家重点研发计划政府间国际科技创新合作重点专项(2018YFE0183600);国家自然科学基金(31971807);中央高校基本科研业务费专项资金(2662020GXPY004)。

摘　　要：为量化评价油菜秸秆生物炭用作缓释载体的潜力,采用高温裂解法,在不同磷酸体积分数(5%、10%、15%)、热解温度(450、550、650℃)和保温时长(40、80、120 min)下制备生物炭,探究其表面形态、官能团组成和理化特性的变化规律,在此基础上引入灰色关联法,综合评价其用作缓释载体的潜力。结果表明,随着磷酸体积分数、热解温度和保温时长的增加,生物炭的炭得率、含水率、挥发分逐渐减小,而灰分、固定碳逐渐增大。基于灰色关联度分析结果,综合考虑各因素对产率的影响,当磷酸的体积分数为10%、热解温度为450℃、保温时长为80 min时,制备的生物炭用作缓释载体的潜力最大。In order to quantitatively evaluate the potential of rape straw biochar as a slow-release carrier,high-temperature cracking method was adopted to prepare biochar under different phosphoric acid volume fractions(5%,10%,15%),pyrolysis temperature(450,550,650℃)and holding time(40,80,120 min).The surface morphology,functional group composition and physicochemical properties of the prepared biochar were investigated.Then,a grey correlation method was introduced to comprehensively assess the potential of the prepared biochar as a slow-release carrier.The results showed that with the increase of phosphoric acid volume fraction,pyrolysis temperature and holding time,the carbon yield,water content and volatile fraction gradually decreased,while the contents of ash and fixed carbon increased.Based on the results of grey correlation analysis and the influences of phosphoric acid volume fraction,pyrolysis temperature and holding time on biochar yield,the biochar prepared under the conditions when the phosphoric acid volume fraction was 10%,the pyrolysis temperature was 450℃,and the holding time was 80 min,had the maximum potential to be used as a slow-release carrier.

关 键 词：生物炭 理化性质 缓释潜力 灰色关联法 油菜秸秆 

分 类 号：S509.9[农业科学—作物学] X705[环境科学与工程—环境工程]