【摘要】 为了探究生物质炭中硫素的直接营养价值，分别在300℃、500℃和700℃下，热解制备了牛粪生物质炭(分别标记为DMBC300、DMBC500和DMBC700),表征了DMBC的基本性质，测定了DMBC中不同形态硫含量，探讨了DMBC中不同形态硫含量随热解温度的变化规律；采用批平衡试验，在水-生物质炭体系下，考察了振荡时间、溶液pH值和霍格兰营养液(HNS)加入对DMBC中水溶性硫酸盐(SO■)释放行为的影响。结果表明，DMBC中不同形态硫含量随热解温度的上升呈现不同的变化趋势。更多还原

【Abstract】 To investigate the direct value of sulfur in biochar, dairy manure biochars(labeled as DMBC300, DMBC500 and DMBC700) were prepared at 300 ℃, 500 ℃, and 700 ℃. The basic properties of biochars were characterized, the different fraction sulfur contents in biochars were determined, and the relationship between sulfur fraction content in biochars and pyrolysis temperatures was explored. Using batch equilibrium experiments, the effects of shaking time, pH value of solution, and addition of Hoglan nutrient solution(HNS) on water soluble sulfate(SO■) release in biochars were examined under the water-biochar systems. The results showed that the different fraction sulfur contents in biochars were closely related to the pyrolysis temperatures.更多还原