鲤鱼肉骨生物炭的制备及其吸附水中Pb2+特性  

Preparation of Carp Meat Bone Biochar and Its Adsorption Characteristics for Pb2+ from Water

作　　者：乔洪涛 乔永生 郑庆荣 赵保卫[2] 龚清 QIAO Hongtao;QIAO Yongsheng;ZHEGN Qingrong;ZHAO Baowei;GONG Qing(Department of Chemistry, Xinzhou teachers University, Xinzhou 034000, China;School of Environmental and Municipal Engineering, Lanzhou Jiaotong University, Lanzhou 730070, China)

机构地区：[1]忻州师范学院化学系,山西忻州034000 [2]兰州交通大学环境与市政工程学院,甘肃兰州730070

出　　处：《水处理技术》2019年第9期62-67,共6页Technology of Water Treatment

基　　金：国家自然科学基金（21167007,21467013,51766008）;“山西省1331工程”重点学科建设计划经费资助（晋教财[2017]122）

摘　　要：以水产养殖固体废弃物病死鲤鱼为生物质原材料,采用限氧裂解技术在600℃条件下制备鲤鱼肉骨生物炭(CMBB),探究了CMBB对水中Pb^2+的吸附特性,并对CMBB的结构和性质进行了表征。结果表明,CMBB表面具有不规则的中孔和微孔结构,表面带有大量的负电荷。CMBB对Pb^2+的吸附在4 h内达到平衡,动力学过程符合准2级动力学模型;吸附速率受内扩散机制控制,但并非唯一的控制机制;Pb^2+在CMBB上的等温吸附过程符合Langmuir、Langmuir-Freundlich和Temkin等温吸附模型,属于有利吸附;吸附过程为自发进行的熵增吸热过程。CMBB能够在较宽的pH范围(2~6)对Pb^2+具有明显的去除效果(去除率大于99%)。The carp meat bone biochar(CMBB) was prepared by limited oxygen cracking technology at 600 ℃, the aquaculture solid waste(dead carp)as the raw material, the adsorption characteristics of CMBB for Pb^2+in aqueous solutions was studied, and the structure and property of CMBB was characterized. The results showed that the surface of CMBB had irregular mesopores and microporous structure, and had a large amount of negative charge.The adsorption of Pb^2+onto CMBB could reach equilibrium after 4 h of reaction. The adsorption kinetics followed the pseudo-second-order kinetcs. The adsorption rate was controlled by internal diffusion mechanism and it was not the only control mechanism. The isotherm adsorption process of Pb^2+onto CMBB was fitted well with the Langmuir, Langmuir-Freundlich and Temkin model, and belonged to beneficial adsorption. The adsorption process was spontaneous, entropy increase and endothermic process. CMBB had a good removal rate(>99%) for Pb^2+in a wide pH range(2~6).

关 键 词：水产养殖废弃物 生物炭 吸附 PB^2+ 吸附机制 

分 类 号：TQ424.3[化学工程] X703.1[环境科学与工程—环境工程]