版权所有:内蒙古大学图书馆 技术提供:维普资讯• 智图
内蒙古自治区呼和浩特市赛罕区大学西街235号 邮编: 010021
作者机构:Key Laboratory for Environmental Factors Control of Agro-Product Quality SafetyMinistry of Agriculture and Rural AffairsTianjin 300191China Agro-Environmental Protection InstituteMinistry of Agriculture and Rural AffairsTianjin 300191China Institute of Resources and Environmental EngineeringShanxi UniversityTaiyuan 030006ShanxiChina Department of Soil QualityWageningen UniversityWageningenThe Netherlands College of Marine and Environmental ScienceTianjin University of Science and TechnologyTianjin 300457China College of Resource and Environmental EngineeringJiangxi University of Science and TechnologyGanzhou 341000JiangxiChina College of Natural Resources and EnvironmentSouth China Agricultural UniversityGuangzhou 510642China
出 版 物:《Biochar》 (生物炭(英文))
年 卷 期:2022年第4卷第1期
页 面:404-418页
核心收录:
学科分类:09[农学] 0903[农学-农业资源与环境] 090301[农学-土壤学]
基 金:the National Natural Science Foundation of China(No.41701262) Key Projects at the Institute of Innovation Engineering
主 题:Biochar Iron mineral nanoparticles Stability DLVO Quantum chemistry
摘 要:Biochar nanoparticles(BCNPs)and iron mineral nanoparticles(IMNPs),such as ferrihydrite nanoparticles(FHNPs),magnetite nanoparticles(MTNPs),and goethite nanoparticles(GTNPs),are often combined and used in soil ***,the stability and interaction of nanoparticles under various environmental conditions have not been investigated *** this study,settling experiments,a semi-empirical model,the Derjaguin-Landau-Verwey-Overbeek(DLVO)theory,scanning electron microscopy(SEM)observations,and quantum chemical calculations were used to study the interaction and heteroaggregation of BCNPs and *** of BCNPs-FHNPs and BCNPs-GTNPs was stable at neutral and alkaline pH(relative concentration of unsettled nanoparticles C_(res’)=0.679-0.824),whereas fast settling of BCNPs-IMNPs was observed at acidic pH(C_(res’)=0.104-0.628).By contrast,BCNPs-MTNPs consistently showed moderate settling regardless of the mass of magnetite at all pH(C_(res’)=0.423-0.673).Both humic acid(HA,10 mg L^(−1))and ionic strength(IS,10 and 100 mM)facilitated the settling of BCNPs-FHNPs and BCNPs-MTNPs systems,whereas the settling of BCNPs-GTNPs was sensitive only to *** acid(10 mg L^(−1))had a general stabi-lizing effect on the BCNPs-IMNPs *** results of SEM and quantum chemical calculations suggested that the interaction between BCNPs and FHNPs(-2755.58 kJ mol^(−1))was stronger than that between BCNPs and GTNPs(−1706.23 kJ mol^(−1))or MTNPs(−1676.73 kJ mol^(−1)).The enhancement of heteroaggregation between BCNPs and IMNPs under unfavorable conditions(acidic pH,HA,and IS)was regulated by the strength of the ***,the enhancement of heteroaggregation of BCNPs-FHNPs was greater than that of *** the BCNPs-GTNPs system,the high concentration and elongated structure of GTNPs may contribute greatly to heteroag-gregation and settling with small *** results highlight the influence of pH,IS,and HA on the interaction between BCNPs and I