文献类型：期刊文献

英文题名：Efficient removal of lead from solution by celery-derived biochars rich in alkaline minerals

作者：Zhang, Tao[1];Zhu, Xiaoxiao[1];Shi, Lingna[1];Li, Jianfa[1];Li, Saijun[1];Lu, Jinhong[1];Li, Yimin[1]

机构：[1]Shaoxing Univ, Coll Chem & Chem Engn, Shaoxing 312000, Zhejiang, Peoples R China

年份：2017

卷号：235

起止页码：185

外文期刊名：BIORESOURCE TECHNOLOGY

收录：SCI-EXPANDED(收录号：WOS:000402479100022)、、EI(收录号：20171403522067)、Scopus(收录号：2-s2.0-85016477790)、WOS

基金：This work was supported by grants from the National Natural Science Foundation of China (21477081, 41271475) and from the Natural Science Foundation of Zhejiang Province, China (LY16B070003).

语种：英文

外文关键词：Biochar; Sorption; Heavy metal; Vegetable waste; Mineral

外文摘要：Biochars were produced from celery biomass by slow pyrolysis at 350 and 500 degrees C, and featured by high content of alkaline minerals namely salts of alkali and alkaline earth metals. The biochars' efficiency on removing Pb2+ from solution was investigated, and two biochars derived from celery stalk (StC350 and StC500) showed higher Pb2+ sorption capacity (288 and 304 mg/g) than most biochars reported previously. The sorption mechanisms involving precipitation, cation exchange and surface complexation are related to three biochar fractions namely water-soluble matter, acid-soluble substances and insoluble organic carbon. The relative contributions of water-soluble matter and acid-soluble substances to the total Pb2+ removal were 59.8% and 36.6% for the StC350 biochar, and 62.8% and 34.9% for the StC500 biochar, respectively. The results indicate that biochars derived from vegetable wastes are potential candidates for efficient sorption of heavy metals. (C) 2017 Elsevier Ltd. All rights reserved.