JOURNAL OF HAZARDOUS MATERIALS
·
2025
·
IF 11.3
Qiuyu Chen,Yongyi Zhang,Haiwang Liu,Peng Liu,Xinxin Ye,Xing Xia,Xiangwei Wu
Straw-derived dissolved organic matter (DOM) is widespread in farmland soils, but the relationship between straw-derived DOM and As in their co-sorption on minerals and the underlying mechanisms remain unclear. Here, batch experiments and spectroscopic analyses were employed to investigate the co-sorption of straw-derived DOM and As(III/V) on γ-Al 2 O 3 . Results showed a trade-off between the As(III/V) and DOM immobilization on γ-Al 2 O 3 under different pH levels, which was caused by competitive sorption. The rape straw-derived DOM (DOM_Ra) exhibited a stronger inhibition on As(III/V) sorption than rice straw-derived DOM (DOM_Ri). This could be due to more aromatic fractions in the DOM_Ra and DOM_Ri, which were preferentially sorbed by γ-Al 2 O 3 . In turn, the preferential sorption of aromatic DOM components was weakened by As(V) sorption, which, however, was not found in As(III) and DOM co-sorption. Furthermore, spectral results indicated that carboxylic groups on the sorbed DOM could provide additional binding sites for As(III/V) to form ternary complexes, but its role was overwhelmed by the DOM competitive sorption, which ultimately exhibited the inhibitory effect of DOM on As(III/V) sorption. These findings enhance the fundamental understanding of the co-sorption of As(III/V) and DOM on soil minerals and contribute to predicting As mobility and OM stability in As-contaminated farmlands with straw return.
研究领域:
环境科学
·
土壤化学
·
农业生态学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
ENVIRONMENTAL POLLUTION
·
2017
·
IF 5.099
Wenjun Zhou,Lingwei Ren,Lizhong Zhu
Clay minerals are the most popular adsorbents/amendments for immobilizing heavy metals in contaminated soils, but the dissolved organic matter (DOM) in soil environment would potentially affect the adsorption/immobilization capacity of clay minerals for heavy metals. In this study, the effects of DOM derived from chicken manure (CM) on the adsorption of cadmium (Cd 2+ ) on two clay minerals, bentonite and zeolite, were investigated. The equilibrium data for Cd 2+ sorption in the absence or presence of CM-DOM could be well-fitted to the Langmuir equation ( R 2 > 0.97). The presence of CM-DOM in the aqueous solution was found to greatly reduce the adsorption capacity of both minerals for Cd 2+ , in particular zeolite, and the percentage decreases for Cd 2+ sorption increased with increasing concentrations of Cd 2+ as well as CM-DOM in aqueous solutions. The adsorption of CM-DOM on zeolite was greater than that on bentonite in the absence of Cd 2+ , however, a sharp increase was observed for CM-DOM sorption on bentonite with increasing Cd 2+ concentrations but little change for that on zeolite, which can be attributed to the different ternary structures on mineral surface. The CM-DOM modified clay minerals were utilized to investigate the effect of mineral-adsorbed CM-DOM on Cd 2+ sorption. The adsorbed form was found to inhibit Cd 2+ sorption, and further calculation suggested it primarily responsible for the overall decrease in Cd 2+ sorption on clay minerals in the presence of CM-DOM in aqueous solutions. An investigation for the mineral surface morphology suggested that the mineral-adsorbed CM-DOM decreased Cd 2+ sorption on bentonite mainly through barrier effect, while in the case of zeolite, it was the combination of active sites occupation and barrier effect. These results can serve as a guide for evaluating the performance of clay minerals in immobilizing heavy metals when animal manure is present in contaminated soils.
研究领域:
环境科学
·
土壤学
✓ 已验证
DOI
PubMed
高影响因子
CHEMOSPHERE
·
2022
·
IF 8.943
Junsuo Li,Xinying Li,Shoucheng Ma,Wei Zhao,Wenming Xie,Jianqing Ma,Yijun Yao,Wei Wei
Microplastics (MPs) can act as vectors for various contaminants in the aquatic environment. Although some research has investigated the adsorption characteristics and influencing factors of metals/organic molecules on MPs, the effects of dissolved organic matter (DOM) (which are ubiquitous active species in ecosystems) on metal oxyanions such as Cr(VI) capture by MPs are largely unknown. This study explored the adsorption behaviors and mechanisms of Cr(VI) oxyanions onto polystyrene (PS) MPs using batch adsorption experiments and multiple spectroscopic methods. The effects of representative DOM components (i.e., humic acid (HA), fulvic acid (FA) and tannic acid (TA)) on Cr(VI) capture by PS were particularly studied. Results revealed a significantly enhanced adsorption of Cr(VI) on PS in the presence of TA. The Cr(VI) adsorption capacity was increased from 2876 μg g −1 to 4259 μg g −1 and 5135 μg g −1 when the TA concentrations raised from 0 to 10 and 20 mg L −1 , respectively. Combined microscopic and spectroscopic investigations revealed that Cr(VI) was reduced to Cr(III) by TA and formed stable Cr(OH) 3 colloids on PS surfaces. Contrarily, HA and FA inhibited Cr(VI) adsorption onto PS, especially at pH > 2.0 and higher DOM concentrations, due to site competition and electrostatic repulsion. Increase in pH was found to reduce zeta potentials of MPs, resulting in inhibited Cr(VI) adsorption. The adsorbed Cr(VI) declined with increasing ionic strength, implying that outer-sphere surface complexation affected the adsorption process in the presence of DOM. These new findings improved our fundamental understanding of the fate of Cr(VI) and MPs in DOM-rich environmental matrices.
研究领域:
环境科学
·
化学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
Water
·
2022
·Vol. 14
·期 14
·2201
·
IF 3.53
Junsuo Li,Shoucheng Ma,Xinying Li,Wei Wei
Dissolved organic matter (DOM) has been widely reported to influence the environmental behavior of microplastics (MPs), but little is known about the properties and mechanisms of interaction between specific DOM components and MPs. Here, we studied the adsorption of three representative DOM components (humic acid, HA; fulvic acid, FA; and tannic acid, TA) on polystyrene (PS) MPs in batch adsorption experiments. Results revealed that HA/FA adsorption was greater under acidic conditions, while higher TA adsorption on PS was found at pH 4 and 6. The divalent cation (Ca2+) exerted a more prominent role in enhancing HA, FA, and TA adsorption on PS than did monovalent ones (K+and Na+). The adsorption process fitted well with the Freundlich isotherm model and the pseudo-second-order kinetics model. The adsorption site heterogeneity was evaluated using the site energy distribution analysis based on the Freundlich model. The greater binding ability of HA on the PS surface caused a more negatively charged surface than FA/TA, as reflected by Zeta potential values. The findings of this study not only provide valuable information about the adsorption behavior and interaction processes of various DOM components on PS MPs, but also aid our efforts to evaluate the environmental behaviors of MPs.Keywords:microplastics;dissolved organic matter;adsorption mechanism;site energy distribution
研究领域:
环境科学
·
化学
✓ 已验证
产品关联
DOI
高影响因子
Nature Communications
·
2025
·Vol. 16
·期 1
·1-15
·
IF 15.7
Chen Qi,Lü Fan,Qiu Junjie,Zhang Hua,He Pinjing
Fenton has become one of the dominant technologies for the treatment of recalcitrantly degradable wastewater. Fenton reaction inevitably generates massive amounts of secondary dissolved organic matter (DOM). However, the pathways and selectivity of reaction remain unclear when Fenton is applied in a complex environmental system with different DOM molecules. Here, we design five levels of Fenton reactions based on typical precursor monomers of different DOM species and their stable isotope-labeled monomers combined with actual DOM media. The molecular information of the Fenton-derived DOM for all reactions is obtained based on ultra-high resolution mass spectrometry. The exact mass difference calculations demonstrate that Fenton degrades eight DOM precursor species by different pathways. The temporal gradient changes in the co-molecular characteristics of the Fenton-derived DOM between individual monomer reactions and gradient mixed monomer reactions confirm Fenton degradation selectivity toward eight DOM precursor species. These findings may provide a theoretical basis for using the Fenton process in the targeted degradation of organics.
研究领域:
环境科学
·
水处理技术
·
有机化学
✓ 已验证
DOI
PubMed
高影响因子
JOURNAL OF HAZARDOUS MATERIALS
·
2020
·
IF 9.038
Cai Hui,Yiping Zhang,Xin Ni,Qilu Cheng,Yunpeng Zhao,Yuhua Zhao,Linna Du,Hui Jiang
The interactions and mechanisms between soil dissolved organic matter (DOM) and three types of iron-based nanoparticles (NPs), i.e., nanoscale zero-valent iron (nZVI) particles, Fe 2 O 3 NPs, and Fe 3 O 4 NPs, were investigated in short-term exposure experiments. The adsorption results showed that soil DOM was rapidly adsorbed on the surface of the iron-based NPs with the adsorption rate varying according to Fe 3 O 4 > Fe 2 O 3 > nZVI. Spectral analysis results revealed that aromatic DOM fractions with high-molecular-weights were preferentially adsorbed. The binding mechanism was determined as hydrogen bonding and ligand exchange via Fourier transform infrared spectroscopy (FT-IR) analysis. Scanning electron microscopy, FT-IR, X-ray photoelectron spectroscopy, and X-ray diffraction were used to identify the corrosion products of the three iron-based NPs at the adsorption equilibrium. The results suggest that Fe 3 O 4 and/or γ-Fe 2 O 3 and α-FeOOH were the main corrosion products of nZVIs and α-FeOOH was obtained as an aged product of Fe 3 O 4 NPs. Results of Cr(VI) removal tests suggest that the aged nZVI achieved 79.87% of Cr(VI) removal and the Cr(VI) removal efficiency was significantly improved by coating DOM onto Fe 2 O 3 NPs. The overall data indicate the fate and transformation of iron-based NPs and the enhancement for Cr(VI) removal after interactions between DOM and NPs.
研究领域:
环境科学
·
化学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
BIORESOURCE TECHNOLOGY
·
2017
·
IF 5.651
Mingyun Jia,Fang Wang,Yongrong Bian,Robert D. Stedtfeld,Guangxia Liu,Jinping Yu,Xin Jiang
Sorption characteristic of sulfamethazine (SMT) to straw biochars pyrolyzed at 300 °C (BC300) and 600 °C (BC600), and the effect of ubiquitous DOM were investigated. Results showed that physisorption (partition) and weak chemical binding (π-π EDA interaction) dominated the sorption of SMT to BC300 and BC600, respectively. Graphene sheets in biochar played important roles in the sorption of SMT, leading to higher sorption capacity ( K f ) on BC600 (1.77 mg 1−n L n g −1 ) than BC300 (0.11 mg 1−n L n g −1 ). Sorption amount of SMT to BC300 was not affected by polysaccharide and malic acid, while it was slightly promoted by citric acid, but dramatically increased 1.25 times by methacrylic acid through decreasing solution pH and providing new sorption sites. Humic acid and bovine serum albumin restrained the sorption of SMT to BC600, but enhanced SMT − adsorption to BC300. The chemical nature of DOM, biochar properties and antibiotic species co-determined the impact of DOM on antibiotics adsorption.
研究领域:
环境科学
·
污染控制
·
土壤修复
✓ 已验证
DOI
高影响因子
CLEAN-Soil Air Water
·
2015
·Vol. 43
·期 10
·1401-1408
·
IF 1.945
Jing Wei,Xiaoyan Liu,Xinying Zhang,Chuanhua Wang,Xueping Chen,Xia Liang,Yunyun Hou,Hongbing Li
Plants change the behavior of pollutants in soil by rhizodeposition in the process of physiochemistry. The effects of hydrosoluble and lipophilic extracts from celery rhizodeposits on pyrene sorption were investigated. The Freundlich sorption coefficient of pyrene decreased from 1143 mg kg −1 in the bulk treatment to 670, 795, and 1030 mg kg −1 in treatments with lipophilic + hydrosoluble, hydrosoluble, and lipophilic extracts, respectively. Although both hydrosoluble and lipophilic extracts inhibited pyrene sorption, they acted at different processes on soil organic matters (SOMs) and dissolved organic matters (DOMs). The analysis of three-dimensional fluorescence excitation-emission matrix spectroscopy revealed that the intensity of soluble humic-like substances increased from 5.73 in the bulk treatment to 7.74, 6.36, and 8.67 in treatments with hydrosoluble, lipophilic and hydrosoluble + lipophilic components, respectively. Images of DOMs by atomic force microscopy illustrated that the hydrosoluble extract greatly expanded the DOMs particles, while the lipophilic slightly shrank them. Moreover, the lipophilic extract dramatically softened SOMs with the glassy transition temperature declining from 50.6 ± 0.5 to 29.7 ± 2.0°C. These results not only provide insights into the mechanisms involved in pyrene sorption but also help us understand how rhizodeposition affects the pyrene bioaccessibility to some extent.
研究领域:
环境科学
·
土壤学
✓ 已验证
DOI
高影响因子
ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH
·
2022
·Vol. 29
·期 57
·86651-86664
·
IF 5.19
Li Caidan,Wang Jing,Jiang Yue,Bai Yilin,Cheng Liu
Pollution of municipal sewage sludge with heavy metals (HMs) inevitably causes secondary contamination, threatening ecosystems and human health. Dissolved organic matters (DOM) would serve as HMs carriers or ligands, directly influencing the transport and distribution. So it is of essential importance to simultaneously evaluate the release characteristics of HMs and DOM from MSS. In this paper, we investigated leaching characteristics of HMs (Cd, Cr, Cu, Zn, Ni, and Mn) and DOM from raw sewage sludge (RSS) and lime-conditioned sewage sludge (LCSS) under simulated rain with different acidities (pH 6.5 and 2.9) via column leaching experiments. The results showed the release of HMs could be divided into two distinct stages, a rapid decreasing changes in the early stage and a slow and steady change in the later stages with a slight increase in the middle of time. At the early stage, DOM was dominated by protein-like components (tryptophan-like, tyrosine-like). As time passed, protein-like components decreased while humic-like components (fulvic acid and humic acid) increased gradually. Protein-like components showed significant positive correlations with HMs, while humic acid-like components showed strong negative correlations with them. Moreover, the leaching efficiencies of Cd, Zn and Mn at pH 2.9 was about 1.5 times higher than that at 6.5, and the fluorescence intensity of humic-like components at pH 2.9 was higher than that at pH 6.5, suggesting that acid rain accelerated the release of HMs and the humification of DOM. Compared with the RSS, the DOM of LCSS showed noticeable differences, especially an obvious increase of the fulvic acid component. And the leaching efficiencies of Cd, Cr, Cu, Ni, and Mn in LCSS were much lower than that in RSS, indicating lime treatment retarded the release of HMs. Thus, our findings will be a guide to the treatment of HMs contaminants in MSS.
研究领域:
环境科学
·
环境工程
·
土壤污染
·
水体生态毒理学
·
固废处理
✓ 已验证
DOI
高影响因子
JOURNAL OF HAZARDOUS MATERIALS
·
2023
·
IF 13.6
Shiyi Hu,Xin Jin,Mengwen Liu,Yao Li,Yadong Wang,Yixiong Wei,Pengkang Jin,Xiaochang C. Wang
The existence of dissolved organic matter (DOM) with low coagulability poses great challenges for conventional coagulation (CC) in water treatment . As a kind of typical organochlorine pesticide , 2,4-dichlorophenoxyacetic acid (2,4-D) cannot be efficiently removed by CC. To enhance the 2,4-D removal, ozonation was applied with coagulation. The hybrid ozonation-coagulation (HOC) achieved 60.61% DOC removal efficiency, which was obviously higher than pre-ozonation coagulation (POC) (45.83%). Synchronous fluorescence spectroscopy revealed stronger complexation between modified 2,4-D and coagulants during the HOC than that in subsequent coagulation of the POC process. During the HOC process, ozone promoted the formation of polymeric Al species, such as Al b . To investigate the 2,4-D removal mechanism, γ-Al 2 O 3 /O 3 process with the same oxidation ability as the HOC was established. 2,4-D was oxidized step-by-step to 2,4-dichlorophenol, 4,6-dichlororesorcin, 3,5-dichlorocatechol, 2-chlorohydroquinone, 4-chlorocatechol, 1,2,4,5-tetrahydroxybenzene, pentahydroxybenzene and oxalic acid in γ-Al 2 O 3 /O 3 process. However, during the HOC process, these oxidized intermediates were readily complexed by coagulants and accumulated in flocs. Especially 1,2,4,5-tetrahydroxybenzene and pentahydroxybenzene, completely complexed by AlCl 3 •6H 2 O hydrolysates as soon as being formed. Immediate entrapment and complexation between coagulant hydrolysates and 2,4-D oxidized intermediates inhibited the generation of small-molecular-weight organics such as oxalic acid, which enhanced the removal of organics with low coagulability.
研究领域:
环境科学
·
水处理工程
✓ 已验证
产品关联
DOI
PubMed
高影响因子
ENVIRONMENTAL SCIENCE & TECHNOLOGY
·
2025
·
IF 11.3
Qianyu Zhang,Huimin Ma,Jun Li,Fei liu,Hongxing Jiang,Jinbo Huang,Bin Jiang,Jing You,Guanghui Dong,Qilu Li,Wanli Ma,Zhiqiang Yu,Gan Zhang
The potential of PM2.5 to cause lung cancer has been well established; however, evidence regarding which specific components are responsible remains limited. We investigated dissolved organic matter (DOM) in PM2.5 using high-resolution mass spectrometry (HRMS) and cellular DNA damage assays to elucidate molecular composition and sources of carcinogenic components. Our analysis revealed hundreds of genotoxic compounds, with condensed aromatic amines predominating in number, abundance, and contribution to overall genotoxicity. Notably, norharman, a heterocyclic aromatic amine, was identified as a key carcinogenic component. Genotoxicity analysis using a lung cell exposure model indicated that, based on the measured concentration ratio of norharman to benzo[a]pyrene in DOM, the genotoxicity of norharman was approximately 0.21 to 0.6 times that of benzo[a]pyrene. Compared to proinflammatory compounds, these carcinogenic compounds exhibited greater unsaturation, increased aromaticity, an augmented reduced state, and the presence of nitrogenous organic matter. Two-ring aromatic amines containing two nitrogen atoms were identified as key contributors to both inflammation and genotoxicity. Regional source apportionment revealed significant regional variability in condensed aromatic amines within PM2.5. While polycyclic aromatic hydrocarbons (PAHs) are significant, condensed aromatic amines also warrant consideration in PM2.5 management. Effective mitigation requires tailored prevention measures based on regional pollution profiles and health impacts.
研究领域:
环境毒理学
·
大气污染与健康
·
分子毒理学
·
环境化学
·
肺癌病因学
·
暴露组学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
ENVIRONMENTAL RESEARCH
·
2025
·
IF 7.7
Zhen Li,Xiaoxu Wang,Qing Luo,Ting Sun,Xin Li,Wanzhen Li
In agricultural ecosystems, the coexistence of microplastics (MPs) and polycyclic aromatic hydrocarbons (PAHs) poses a serious environmental challenge. However, a systematic understanding of their migration mechanisms and driving factors remains inadequate. The core innovation of this research was the integration of dynamic soil column leaching with multi-factor control. By employing a multi-factor controlled soil column leaching experiment, we aimed to elucidate the coupled mechanisms underlying the interactive effects of pH and dissolved organic matter (DOM) on the dynamic migration behavior of PAHs in MPs-contaminated soi, thereby establishing a more comprehensive and environmentally relevant mechanistic model. The results indicated that the migration dynamics of PAHs in the soil profile were significantly influenced by pH. Under acidic (pH 3 and 5) and alkaline (pH 9 and 11) leaching conditions, the residue of PAHs was significantly enhanced. When the pH was 11, the residual concentration of PAHs reached their peak at a depth of 30–40 cm (8264.22 ± 167 ng g −1 in polyethylene (PE)-contaminated soil and 4026.17 ± 189 ng g −1 in the control soil (CK)). At all pH levels, the PAHs residual amounts in PE-contaminated soil were consistently (21 ± 2.4)% - (73 ± 5.8)% higher than those in CK. Under acidic and alkaline leaching conditions, the residual concentrations of low-ring (2–3 rings) and medium-ring (4 rings) PAHs in both soils increased initially and then decreased with depth, reaching their peaks at 30–40 cm and 40–50 cm, respectively. pH variations altered the surface charges of PE-MPs and soil particles, establishing electrostatic interactions may be the predominant mechanism governing PAHs-MPs interactions. With the increase in DOM concentration (5–40 mg L −1 ), the residual concentrations of PAHs in each ring were significantly reduced by (19.4 ± 1.5)% - (22.7 ± 2.6)%. Without DOM treatment, the residual amounts continuously decreased with depth, reaching the lowest at 40–50 cm. High-ring PAHs showed strong depth attenuation characteristics in the presence of DOM, with the residual percentages ((32 ± 3.6)% - (56 ± 5.2)%) significantly higher than those of low-ring PAHs ((14 ± 0.9)% - (26 ± 2.3)%). The results shown that the aromatic structures within DOM promoted the adsorption of PAHs throughπ-πinteractions. The residual amounts of each PAH component in PE-contaminated soil were (18.6 ± 1.3)% - (23.8 ± 0.8)% higher than those in CK. The PAHs adsorption phenomenon exhibited by MPs may be governed by the combined effects of electrostatic interactions, π-π interactions and hydrophobic partitioning effect. This study revealed that soil rich in MPs enhanced the environmental residue effect of PAHs through pH and DOM regulation mechanisms, thereby reducing the risk of groundwater pollution.
研究领域:
环境科学
·
土壤学
·
环境污染
·
生态毒理学
·
地球化学
·
农业生态学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
危险品化学品经营许可证（带存储）