{"title":"Pyrolysis or not: Comparison between biomass and biochar for vanadium stabilization in soil","authors":"Rongyue Geng, Baogang Zhang, Song Wang, Jin Li","doi":"10.1016/j.jclepro.2025.145246","DOIUrl":null,"url":null,"abstract":"<div><div>Vanadium (V) ore mining and processing result in abandoned V in soil, whose immobilization is crucial for pollution control. Utilizing recyclable biomass and biochar materials as (bio)stabilization agents for V is promising, but their efficacies have rarely been comparatively investigated. In this study, the efficacy of raw biomass (rice husk and sawdust) and their pyrolytic derivatives (biochar produced at 300 °C and 600 °C) in stabilizing V within contaminated soil matrices was systematically examined. The results indicated that rice husk outperforms wood chips, achieving a stabilization efficiency of 47.7 ± 2.84 % within 42 d. Mechanistic analyses indicated the reduction of mobile pentavalent V to insoluble tetravalent V precipitates, a process mediated by redox-active organic functional groups inherent to biomass substrates. Furthermore, soil microbiomes played a pivotal role in V stabilization, with taxa including <em>KD4-96</em>, <em>MND1</em>, <em>Comamonadaceae</em>, <em>Methylotenera</em>, and <em>Pseudolabrys</em> demonstrating exceptional V tolerance and serving as key drivers of microbial-mediated V reduction. Comparative assessment highlighted that biomass amendments not only enhanced V immobilization but also positively modulated microbial community composition and diversity, outperforming biochar treatments. This study is helpful to choose proper materials for remediation of V-contaminated soil.</div></div>","PeriodicalId":349,"journal":{"name":"Journal of Cleaner Production","volume":"500 ","pages":"Article 145246"},"PeriodicalIF":9.7000,"publicationDate":"2025-03-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"Journal of Cleaner Production","FirstCategoryId":"93","ListUrlMain":"https://www.sciencedirect.com/science/article/pii/S0959652625005967","RegionNum":1,"RegionCategory":"环境科学与生态学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q1","JCRName":"ENGINEERING, ENVIRONMENTAL","Score":null,"Total":0}
引用次数: 0
Abstract
Vanadium (V) ore mining and processing result in abandoned V in soil, whose immobilization is crucial for pollution control. Utilizing recyclable biomass and biochar materials as (bio)stabilization agents for V is promising, but their efficacies have rarely been comparatively investigated. In this study, the efficacy of raw biomass (rice husk and sawdust) and their pyrolytic derivatives (biochar produced at 300 °C and 600 °C) in stabilizing V within contaminated soil matrices was systematically examined. The results indicated that rice husk outperforms wood chips, achieving a stabilization efficiency of 47.7 ± 2.84 % within 42 d. Mechanistic analyses indicated the reduction of mobile pentavalent V to insoluble tetravalent V precipitates, a process mediated by redox-active organic functional groups inherent to biomass substrates. Furthermore, soil microbiomes played a pivotal role in V stabilization, with taxa including KD4-96, MND1, Comamonadaceae, Methylotenera, and Pseudolabrys demonstrating exceptional V tolerance and serving as key drivers of microbial-mediated V reduction. Comparative assessment highlighted that biomass amendments not only enhanced V immobilization but also positively modulated microbial community composition and diversity, outperforming biochar treatments. This study is helpful to choose proper materials for remediation of V-contaminated soil.
期刊介绍:
The Journal of Cleaner Production is an international, transdisciplinary journal that addresses and discusses theoretical and practical Cleaner Production, Environmental, and Sustainability issues. It aims to help societies become more sustainable by focusing on the concept of 'Cleaner Production', which aims at preventing waste production and increasing efficiencies in energy, water, resources, and human capital use. The journal serves as a platform for corporations, governments, education institutions, regions, and societies to engage in discussions and research related to Cleaner Production, environmental, and sustainability practices.