猪粪和猪粪渣生物炭理化性质及镉吸附性能研究  

Physicochemical Properties and Cadmium Adsorption Capacity of Biochar Derived from Pig Manure and Pig Manure Residue

作　　者：董彩琴 黄辉 黄爽[1] 黄介生[1] 邓依依 DONG Cai-qin;HUANG Hui;HUANG Shuang;HUANG Jie-sheng;DENG Yi-yi(State Key Laboratory of Water Resources and Hydropower Engineering Science,Wuhan University,Wuhan 430072,China)

机构地区：[1]水资源与水电工程科学国家重点实验室,武汉大学水利水电学院,湖北武汉430072

出　　处：《中国农村水利水电》2018年第8期105-112,共8页China Rural Water and Hydropower

基　　金：国家科技支撑计划(2015BAD05B02); 国家自然科学基金(51109166)

摘　　要：为研究不同处理方式对生物炭理化性质、表征及镉吸附性能的影响,以猪粪、猪粪渣为原料,采用2种不同的前处理方式(热解前、后过筛),分别于300~700℃制备生物炭,通过SEM、XRD和FTIR对其进行表征并分析其理化性质,探讨不同处理生物炭理化性质及镉吸附能力之间的相关关系。随着热解温度的升高,生物炭的产率、H/C减小,pH值、灰分含量、BET比表面积增加。猪粪生物炭的化合物的种类比猪粪渣生物炭复杂,且在热解温度较高时(500~700℃),猪粪生物炭镉吸附量(最大吸附量为36.4 mg/g)显著高于猪粪渣生物炭(最大吸附量为23.5 mg/g);4种不同处理生物炭的产率与灰分含量呈极显著的负相关关系,与H/C比值呈显著的正相关关系,灰分含量也与pH值有较强的正相关关系;生物炭的镉吸附量关键因子是H/C,其次是BET比表面积、灰分含量、O/C等。In order to compare the effects of different treatments on the physicochemical properties and cadmium adsorption capacity of biochar,two kinds of agricultural solid wastes（ pig manure,pig manure residue） were pyrolyzed at five temperatures（ 300,400,500,600,700 ℃） using two sieving treatments（ before and after pyrolysis）. The effects of different treatments on the physicochemical properties of biochar were investigated. The biochar was also characterized by scanning electron microscopy（ SEM）,X-ray diffraction（ XRD） and Fourier transform infrared spectro graph（ FTIR）. The cadmium adsorption capacity of biochar was determined by a batch experiment. The relationship between physicochemical properties and adsorption capacity of biochar was also analyzed. With increasing pyrolysis temperature,pH value,ash content and BET specific surface area of biochar were increased,and yield,the H/C molar ratio were decreased. The types of compounds contained in pig manure biochar were more abundant,and the adsorption capacity of pig manure biochar was larger than the pig manure residue biochar when the pyrolysis temperature rised to 500 ~ 700 ℃. The maximum adsorption of pig manure residue biochar reached to 23.5 mg/g,that of pig manure biochar reached to 36. 4 mg/g. Yield and ash content of different biochar were significantly negatively correlated,while yield showed highly significant and positive correlation with H/C,and the ash content of biochar was positively correlated with pH value. The H/C molar ratio was important for the cadmium adsorption capacity of biochar,and the BET specific surface,ash content,O/C molar ratio were of secondary importance.

关 键 词：猪粪 猪粪渣 生物炭 理化性质 镉吸附量 

分 类 号：TV93[水利工程—水利水电工程] S278[农业科学—农业水土工程]