文献类型：期刊文献

英文题名：Reducing the bioavailability and leaching potential of lead in contaminated water hyacinth biomass by phosphate-assisted pyrolysis

作者：Shi, Lingna[1];Wang, Lijun[1];Zhang, Tao[1];Li, Jianfa[1];Huang, Xiaoyi[1];Cai, Jing[1];Lu, Jinhong[1];Wang, Yue[1]

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

年份：2017

卷号：241

起止页码：908

外文期刊名：BIORESOURCE TECHNOLOGY

收录：SCI-EXPANDED(收录号：WOS:000405502400106)、、EI(收录号：20172503795911)、Scopus(收录号：2-s2.0-85020792214)、WOS

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

语种：英文

外文关键词：Heavy metal; Biosorption; Stabilization; Biochar; Waste disposal

外文摘要：For the purpose of safe disposal of biomass contaminated by biosorption of heavy metals, phosphate-assisted pyrolysis of water hyacinth biomass contaminated by lead (Pb) was tried to reduce the bioavailability and leaching potential of Pb, using direct pyrolysis without additive as a control method. Direct pyrolysis of the contaminated biomass at low temperatures (300 and 400 degrees C) could reduce the bioavailability of Pb, but the leaching potential of Pb was increased with the rising pyrolysis temperature. While phosphate-assisted pyrolysis significantly enhanced the recovery and stability of Pb in the char. Specifically, the percentages of bioavailable Pb and leachable Pb in the chars obtained by phosphate-assisted pyrolysis at low temperatures were reduced to less than 5% and 7%, respectively. The sequential extraction test indicated the transformation of Pb into more stable fractions after phosphate-assisted pyrolysis, which was related to the formation of Pb phosphate minerals including pyromorphite and lead-substituted hydroxyapatite. (C) 2017 Elsevier Ltd. All rights reserved.