A5103170815- Iron oxide chemistry and applications
- Arsenic contamination and mitigation
- Geochemistry and Elemental Analysis
- Mine drainage and remediation techniques
- Radioactive element chemistry and processing
- Chromium effects and bioremediation
- Marine and coastal ecosystems
- Heavy metals in environment
- Soil Carbon and Nitrogen Dynamics
- Environmental remediation with nanomaterials
- Electrocatalysts for Energy Conversion
- Adsorption and biosorption for pollutant removal
- Biocrusts and Microbial Ecology
- Microbial Fuel Cells and Bioremediation
- Soil and Water Nutrient Dynamics
- Isotope Analysis in Ecology
- Catalytic Processes in Materials Science
- Clay minerals and soil interactions
- Advanced oxidation water treatment
- Metal Extraction and Bioleaching
- Supercapacitor Materials and Fabrication
- Aquatic Ecosystems and Phytoplankton Dynamics
- Extraction and Separation Processes
- Mercury impact and mitigation studies
- Groundwater flow and contamination studies
South China University of Technology
2016-2025
Ministry of Education
2025
Washington State University
2014-2015
Through controlling the phase transformation and chromium species under hydrothermal condition, Cr(VI) was extracted fully from hazardous Cr(VI)-containing gypsum sludge, with a very high efficiency of more than 99.5%. Scanning transmission electron microscopy, X-ray absorption fine structure, density functional theory calculation results revealed that dissolution-recrystallization CaSO4·2H2O into CaSO4 key factor to release encapsulated Cr(VI). Moreover, mineralizer (persulfate salt)...
Hexavalent chromium contamination is a global environmental issue and usually reoccurs in alkaline reduced chromite ore processing residues (rCOPR). The oxidation of Cr(III) solids rCOPR one possible cause but as yet little studied. Herein, we investigated the Cr(OH)3, typical species rCOPR, at pH (9-11) with δ-MnO2 under oxic/anoxic conditions. Results revealed three pathways for oxic conditions: (1) by oxygen, (2) δ-MnO2, (3) catalytic Mn(II). Oxidations latter two were efficient, via...
Abstract It is of fundamental and technological significance to develop dual‐role anode materials for both lithium‐ion batteries (LIBs) sodium‐ion (SIBs) with high performance. Here, a composite material based on CoSe 2 nanoparticles encapsulated in N‐doped carbon framework intertwined nanotubes (CoSe @N‐CF/CNTs) prepared successfully from cobalt‐based zeolitic imidazolate (ZIF‐67). As LIBs, @N‐CF/CNTs composites deliver reversible capacity 428 mAh g −1 even after 500 cycles at current...
Dissolved organic matter (DOM) plays a key role in many biogeochemical processes, but the drivers controlling diversity of chemical composition and properties DOM molecules (chemodiversity) soils are poorly understood. It has also been debated whether environmental conditions or intrinsic molecular control accumulation persistence due to complexity both interactions between surrounding environments. In this study, soil samples were extracted from 33 collected different regions China, we...
In natural environments, kinetics of As(V) sequestration/release is usually coupled with dynamic Fe mineral transformation, which further influenced by the presence organic matter (NOM). Previous work mainly focused on interactions between and minerals. However, there a lack both mechanistic quantitative understanding kinetic processes in As(V)-Fe mineral-NOM system. this study, we investigated effect humic acids (HA) ferrihydrite transformation into hematite/goethite sequestration...
Quantitative understanding the kinetics of toxic ion reactions with various heterogeneous ferrihydrite binding sites is crucial for accurately predicting dynamic behavior contaminants in environment. In this study, As(V), Cr(VI), Cu(II), and Pb(II) adsorption desorption on was studied using a stirred-flow method, which showed that metal adsorption/desorption highly dependent reaction conditions varied significantly among four metals. High resolution scanning transmission electron microscopy...
In soil environments, the sequestration and transformation of organic carbon are closely associated with minerals. Birnessite (MnO2) is known to strongly interact dissolved matter (DOM), but microscopic distribution molecular DOM on birnessite still poorly understood. this study, coupled sorption oxidation were investigated at both scale level. Spherical aberration corrected scanning transmission electron microscopy (Cs-STEM) results revealed, nano- sub-nanoscale, that was located surfaces...
The behavior of arsenic (As) is usually coupled with iron (Fe) oxide transformation and mediated by both abiotic reactions microbial processes in the environment. However, quantitative models for kinetic processes, which specifically consider arsenate-reducing gene expression correspondent to different reaction conditions, are lacking. In this study, based on pure cultured Shewanella putrefaciens incubation experiments, extended X-ray absorption fine structure spectroscopy, high resolution...
The ability to predict coupled kinetic reactions of arsenic (As) that occur at the manganese oxide–aqueous solution interface is crucial for management and remediation As-contaminated sites worldwide. A quantitative understanding coupling between As oxidation adsorption/desorption kinetics will enable us more accurately behavior As. In this study, we developed a novel model adsorption/desorption/oxidation on δ-MnO2. As(III) adsorption δ-MnO2 was studied using stirred-flow method under...
While the reaction mechanisms between ferrihydrite and sulfide are well-documented, role of redox reactions on particle–particle stability colloids is largely overlooked. Such critical for a number (bio)geochemical processes governing ferrihydrite-based colloid processing their associated in nutrient contaminant subsurface dynamics. Taking fundamental chemistry approach, along with complementary suite characterization techniques, here, we explore over wide range environmentally relevant...
Core Ideas Gellike and dense ferrihydrite had different structures Pb/Cu distributions. Ferrihydrite morphology solution chemistry affected sorption desorption kinetics. The kinetics model successfully described the stirred‐flow kinetic data of Pb Cu. Different binding sites controlled adsorption differently. Understanding effect on reactions metals with is essential for predicting dynamic behavior in soil. In this study, Pb(II) Cu(II) two types ferrihydrite, freshly precipitated gellike...
The dynamic behavior of arsenic (As) species is closely associated with iron mineral dissolution/transformation in the environment. Bacterially induced As(V) desorption from oxides may be another important process that facilitates release without significant reductive dissolution oxides. Under impact bacterially desorption, As kinetic controlled by both microbial reduction and As(III)&As(V) reactions on oxide surfaces. However, there still a lack quantitative understanding coupled kinetics...
Although the dual role of natural organic matter (NOM) as an electron shuttle and donor for dissimilatory iron (Fe) reduction has been extensively investigated, underlying interfacial interactions between various exposed facets NOM are poorly understood. In this study, fulvic acid (FA), typical NOM, was used its effect on hematite {001} {100} by Shewanella putrefaciens CN-32 investigated. FA accelerates bioreduction rates {100}, where rate is lower than that {001}. Secondary Fe minerals were...
Soil dissolved organic matter (DOM) is composed of a mass complex compounds in soil solutions and significantly affects range (bio)geochemical processes environment. However, how the chemical complexity (i.e., heterogeneity chemodiversity) DOM molecules their proton metal binding ability remains unclear, which limits our for predicting environmental behavior metals. In this study, we developed unified modeling approach quantifying based on Cu titration experiments, Fourier transform ion...