Co-carbonization of biomass and oily sludge to prepare sulfamethoxazole super-adsorbent materials
Co-carbonization of biomass and oily sludge to prepare sulfamethoxazole super-adsorbent materials
复制标题
生物质与含油污泥共碳化制备磺胺甲恶唑超吸附材料
DOI：
10.1016/j.scitotenv.2019.134238
复制
发表时间：
2019
影响因子：
9.8
通讯作者：
Qunxing Huang
中科院分区：
文献类型：
--
作者：
AiYue Wang;Kai Sun;Liping Wu;Ping Wu;Wenchao Zeng;Zhongmin Tian;Qunxing Huang
将不同的生物质材料(核桃壳、椰壳和杨木木屑)与富碳含油污泥共热解，制得水相磺胺甲恶唑(SMZ)吸附材料。用K2CO3活化共热解焦炭，对其微观结构和官能团进行改性。结果表明，由该混合物制备的AC比生物质基AC含有更多的中孔，比含油污泥基AC具有更多的孔道和更高的产率。一步活化法比二步活化法具有更大的比表面积(近4倍)、更宽的孔径分布(2-3 nm)和更强的SMZ吸附能力(大于2倍)。以核桃壳和含油污泥为原料，一步活化制备的AC的最大比表面积为1342m~2/g，最大吸附容量达361.9 mg/g，高于文献报道的值。ACs对SMZ的吸附能力主要与孔径分布、比表面积和官能团有关。其中，合适的单键和双键的官能团含量、较大的比表面积和较多的孔径(2~3 nm)有利于较高的吸附容量。
Different biomass materials (walnut shell, coconut shell or cottonwood sawdust) were co-pyrolyzed with carbon-enriched oily sludge to produce aqueous phase sulfamethoxazole (SMZ) adsorption materials. The co-pyrolysis char was activated with K2CO3to modify its micro-structure and functional groups. Results show that ACs prepared from the mixture contained more mesopores than biomass-based ACs, more porous and higher yield than oily sludge-based ACs. One-step activation method was more attractive than two-step activation in larger specific surface area (up to almost 4 times), wider pore size distribution (2–3 nm), stronger SMZ adsorption ability (higher than 2 times). The maximum BET surface area was 1342 m2/g for the ACs prepared from the mixture of walnut shell and oily sludge by one-step activation and it had the maximum SMZ adsorption capacity up to 361.9 mg/g, which is higher than previous reported values. The capacity of SMZ adsorption of ACs was mainly attributed to pore size distribution, specific surface area and functional groups. Among them, the appropriate content of Csingle bondO and Cdouble bondO functional groups, larger specific area and more pores range from 2 to 3 nm lead to higher adsorption capacity.