Effect Of Different Pyrolysis Temperatures On Physico-Chemical Characteristics And Lead(Ii) Removal Of Biochar Derived From Chicken Manure
文献类型： 外文期刊
作者： Yan, CX; Xu, YM; Wang, L; Liang, XF; Sun, YB; Jia, HT
作者机构：
期刊名称： RSC ADVANCES
ISSN：
年卷期： 2020 年 10 卷 7 期
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收录情况： JCR（2021版） ; EI（2021版）
摘要： Biochar derived from chicken manure, as an effective metal adsorbent, was prepared through a pyrolysis method at different pyrolytic temperatures (200, 400, 600, and 800 degrees C). The physicochemical characteristics of chicken manure biochar (CMB) and its lead (Pb2+) adsorption mechanisms were studied by batch adsorption experiments, DTA/TGA, XRD, SEM-EDS, FTIR and an analysis of the composition of their mineral ash. Results showed that the best-fit for the Pb2+ adsorption data was achieved using a Langmuir isotherm and a pseudo-second-order model. The maximum adsorption capacities of Pb2+ increased with increasing of pyrolytic temperatures of the CMB, being 180.21, 200.80, 239.59, and 242.57 mg g(-1), respectively, for CMB-200, CMB-400, CMB-600 and CMB-200. Although Pb2+ adsorption on CMB revealed that adsorption was controlled by multiple mechanisms, (e.g. surface complexation, ion exchange, surface precipitation, electrostatic attraction, physical adsorption, and co-precipitation), the ion exchange and surface precipitation played a dominant role in Pb2+ sorption. Using CMB for the removal of Pb from water is proposed as an effective, environmentally protective, novel approach.
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