ENVIRONMENTAL SCIENCE & TECHNOLOGY
·
2024
·
IF 10.8
Jun Zhang,Ziqi Zhu,Mengyuan Niu,Menghan Yu,Xiongbo Dong,Huaming Yang
Soil minerals influence the biogeochemical cycles of fluoride (F) and phosphorus (P), impacting soil quality and bioavailability to plants. However, the cooperative mechanisms of soil minerals in governing F and P in the soil environment remain a grand challenge. Here, we reveal the essential role of a typical soil mineral, montmorillonite (Mt), in the cycling and fate of F and P. The results show that the enrichment of metal sites on the Mt surface promotes the mineralization of F to the fluorapatite (FAP) phase, thereby remaining stable in the environment, simultaneously promoting P release. This differential behavior leads to a reduction in the level of F pollution and an enhancement of P availability. Moreover, solid-state NMR and HRTEM observations confirm the existence of metastable F–Ca–F intermediates, emphasizing the pivotal role of Mt surface sites in regulating crystallization pathways and crystal growth of FAP. Furthermore, the in situ atomic force microscopy and theoretical calculations reveal molecular fractionation mechanisms and adsorption processes. It is observed that a competitive relationship exists between F and P at the Mt interface, highlighting the thermodynamically advantageous pathway of forming metastable intermediates, thereby governing the activity of F and P in the soil environment at a molecular level. This work paves the way to reveal the important role of clay minerals as a mineralization matrix for soil quality management and offers new strategies for modulating F and P dynamics in soil ecosystems.
研究领域:
土壤科学
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环境科学
·
地球化学
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产品关联
DOI
PubMed
高影响因子
CHEMOSPHERE
·
2017
·
IF 4.208
Cheng Liu,Nan Xu,Gang Feng,Dongmei Zhou,Xueying Cheng,Zuling Li
Due to the potential negative impact of nano silica (nSiO 2 ) on human's health and living environments, it is important to investigate their transport in soil environments. Hydrochars has been widely used in agricultural soil and phosphate (P) is an important nutrient, thus the aggregation and transport of nSiO 2 in saturated sand columns were investigated in single and binary systems of hydrochars and P. The experimental results showed that the nSiO 2 aggregates can be restablized by the adsorption of P or the attachment of hydrochars at high IS (>100 mM) and low pH (<7.0). Accordingly, the transport of nSiO 2 in sand columns is enhanced due to the smaller particle size. However, the nSiO 2 presents the distinct surface characteristics at pH > 7.0 from that at pH < 7.0. Thus, nSiO 2 has a better dispersivity in 300 mM NaCl solution at high pH (9.0). Nevertheless, their deposition to sands becomes pronounced in the presence of hydrochars and/or P. In particular, the formation of nSiO 2 -hydrochar-Phosphate clusters associated with the larger size mainly contributes to the enhancement of nSiO 2 retention in sand columns during the wide pH range, when hydrochars and P coexist in suspensions. The two-site dynamic model fitting results showed that the reversible retention is related to k 2 (First-order straining coefficient on site 2). The results in this study will provide the theoretical basis for assessing the retention of nSiO 2 in soil environment with the presence of hydrochars and phosphate.
研究领域:
环境科学
·
农业科学
✓ 已验证
DOI
PubMed
高影响因子
npj Science of Food
·
2025
·Vol. 9
·期 1
·1-11
·
IF 7.8
Zhang Yun,Sun Xinru,Lu Ang’ang,Lai Jianxia,Yang Yuran,Zhang Jie,Jaouhari Abdelhadi E. L.,Zhu Jinhua,Ma Fanyi
This study compared the effects of cooking processes (including steaming, boiling, hot-air roasting and microwaving) on the nutrients of Dioscorea opposita planting in sandy soil (SSCY) and loessial soil (LSCY). The contents of crude fiber and reducing sugar increased significantly during cooking for SSCY, whereas those of LSCY remained unchanged. A significant decline in allantoin content was observed in boiled yams (approximately 6.0% for SSCY and 14.1% for LSCY, respectively). Moreover, the differences in chemical compositions between SSCY and LSCY were compared using non-targeted metabolomics. Totally, 656 differential metabolites of LSCY were identified, including lipids, nucleotides, amino acids and derivatives, and organic acids, which might be the key reason why LSCY exhibits higher nutritional values than SSCY. This research contributed to understanding the systematic metabolic changes during planting and the molecular mechanisms influencing the quality formation, providing the theoretical references for the more scientific consumption of Chinese yam.
研究领域:
植物学
·
食品科学
·
土壤科学
·
营养学
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DOI
PubMed
高影响因子
ACS Omega
·
2018
·
IF 0
Shenghong Kang,Guozhong Wang,Huijun Zhao,Weiping Cai
The remediation of soil contaminated by 1,1,1-trichloro-2,2-bis(4-chlorophenyl) ethane (DDT) has been a challenge. In this paper, the degradation performances of the ball milling-induced plate-like sub-microstructured zero valent iron (SMZVI) to DDT in a real soil environment is studied. It has been found that such SMZVI exhibits much higher degradation performances to DDT in soil than commercial ZVI powders under acidic conditions. More than 95% DDT could be degraded within 80 min in the 5 ppm DDT-contaminated soil with addition of 50 mg g–1 SMZVI, which is much better than the previously reported results. The time-dependent DDT removal amount can be well described by the pseudo first-order kinetic model. Further experiments have revealed that the ZVI dosages, surfactant’s and acidic additions, and the weight ratio of soil-to-water in the slurries are important to DDT degradation, and the degradation products were mainly DDD (a product with less chlorine). An acid-assisted ZVI-induced reductive dechlorination process is proposed, which can well explain the DDT degradation behaviors in soil and the influence from the other factors. This work not only deepens the understanding of DDT degradation in soils based on ZVI but also demonstrates that the SMZVI could be a promising material for DDT degradation in real environments.
研究领域:
环境科学
·
污染修复
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产品关联
DOI
PubMed
INTERNATIONAL JOURNAL OF BIOLOGICAL MACROMOLECULES
·
2023
·
IF 8.2
Zhiyuan Meng,Xinyan Li,Yueyin Liang,Yuexin Gu,Xu Xu,Zhonglong Wang,Yiqin Yang,Shifa Wang
As a virulent heavy metal ion, Hg 2+ will lead to a serious threat to ecosystem and human health. In this work, we reported a chitosan-naphthalimide fluorescent probe CS-NA-ITC for specific recognition and efficient adsorption of Hg 2+ . CS-NA-ITC showed no fluorescence in solution state, while the fluorescence intensity increased obviously at the presence of Hg 2+ , accompanied by the fluorescence color becomes from colorless to bright yellow. It displayed favorable properties like low detection limit (73 nM), extensive pH detection range (5–10) and excellent anti-interference ability. The binding pattern of CS-NA-ITC to Hg 2+ was verified by Job's plot, XPS analysis and FT-IR test. In addition, CS-NA-ITC was utilized to recognition of Hg 2+ in actual water and soil samples and seafood products. Furthermore, the CS-NA-ITC hydrogel could be employed as an efficient Hg 2+ adsorbent with good reusability, which adsorption ability was enhanced compared to chitosan hydrogel.
研究领域:
环境科学
·
分析化学
·
生物医学
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产品关联
DOI
PubMed
高影响因子
ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH
·
2018
·Vol. 25
·期 30
·30160-30169
·
IF 2.8
Ding Jiafeng,Long Gaoyuan,Luo Yang,Sun Runze,Chen Mengxia,Li Yajun,Zhou Yanfang,Xu Xinhua,Zhao Weirong
Hydroxylated polybrominated diphenyl ethers (OH-PBDEs) are ubiquitous and highly toxic emerging endocrine disruptors found in surface and subsurface soils and clay deposits. Seriously, they could be easily transformed to the more toxic dioxins (PBDD/Fs) in photochemical processes and incineration, but the spontaneous formation of PBDD/Fs has rarely been reported. This study focused on the formation of 1,3,8-tribromodibenzo- p -dioxin (1,3,8-TrBDD) and 2,4,6,8-tetrabromodibenzofuran (2,4,6,8-TeBDF) from 2′-OH-BDE-68 and 2,2′-diOH-BB-80 under the oxidization of iron and manganese oxides (goethite and MnO x ). Approximately 0.09 μmol/kg (2.33%) and 0.17 μmol/kg (4.15%) were transformed to 1,3,8-TrBDD and 2,4,6,8-TeBDF by goethite in 8 days and a higher conversion 0.15 μmol/kg (3.77%) and 0.23 μmol/kg (5.74%) were observed for MnO x in 4 days. However, the formation of PBDD/Fs, probably proceeding via Smiles rearrangements and bromine elimination processes, was greatly inhibited by the presence of water. Transformation of OH-PBDEs by goethite and MnO x was accompanied by release of Fe and Mn ions and the possible pathways for the formation of reaction products were proposed. In view of the ubiquity of OH-PBDEs and metal oxides in the environment, oxidation of OH-PBDEs mediated by goethite and MnO x is likely an abiotic route for the formation of PBDD/Fs.
研究领域:
环境科学
·
毒理学
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产品关联
DOI
PubMed
高影响因子
JOURNAL OF HAZARDOUS MATERIALS
·
2022
·
IF 14.224
Pengfei Cheng,Zhipeng Lin,Xuqiang Zhao,Michael Gatheru Waigi,Galina K. Vasilyeva,Yanzheng Gao
Manganese oxides (Mn oxides) are ubiquitous and may coexist with Fe(III) ions in soil environments. In this study, acid birnessite , alkaline birnessite, cryptomelane, pyrolusite, manganite , and their Fe(III)-modified analogues were synthesized and used for benzo(a)pyrene transformation. Fe-modified Mn oxides show a markedly enhanced transformation capability towards benzo(a)pyrene. Specifically, the benzo(a)pyrene transformation rate constants k for Bir-H, Bir-OH, Cry, Pyr, and Man were 0.49, 0.080, 0.0071, 0.0055, and 0.0022 h −1 , respectively. After Fe(III) modification, the transformation rate constants were increased to 22, 2.7, 0.25, 0.0072 and 0.0098 h −1 , respectively. Fe(III)-modified layered birnessites exhibited better activity than Fe(III)-modified tunnel Mn oxides, which was attributed to their high Fe(III) contents and abundant active free radicals. Fe(III) was found to accept electrons from benzo(a)pyrene, thereby accelerating the benzo(a)pyrene transformation. Moreover, modification with Fe(III) increased the surface adsorbed water and oxygen, and promoted the generation of active free radicals. Finally, the physicochemical and biochemical properties of transformation products showed the environmental benefits of this process. Overall, the results indicate that the occurrence of Fe(III) ions could promote the removal of PAHs in Mn oxides-rich soils, and this study provides a credible understanding of PAH fates in natural soils.
研究领域:
环境科学
·
土壤化学
·
污染物转化
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产品关联
DOI
PubMed
高影响因子
JOURNAL OF AGRICULTURAL AND FOOD CHEMISTRY
·
2024
·
IF 5.7
Chunli Lei,Zicong Ding,Mengna Tao,Yubo Lu,Lanqing Xu,Bingxu Cheng,Chuanxi Wang,Zhenyu Wang
The enormous potential of carbon dots (CDs) in agriculture has been widely reported, whereas their accurate distribution, transformation, and metabolic fate and potential soil health effects are not clearly understood. Herein, 13C-labeled CDs (13C-CDs) were sprayed on maize leaf, accumulated in all tissues, and promoted photosynthesis. Specifically, 13C-CDs were internalized to participate in the synthesis of glucose, sucrose, citric acid, glyoxylate, and chlorogenic acid, promoting tricarboxylic acid cycle (TCA) and phenylalanine metabolism. Additionally, the catabolism of 13C-CDs in vivo was mainly mediated by O2•– produced by oxidative stress. 13C-CDs did not have an obvious impact on the soil environment at the overall level. The detection of 13C signals in soil fauna suggested 13C-CDs in soil food chain transmission. This study systematically described the exact fate of CDs in plants and potential soil ecological risks and provided a more comprehensive analysis and support for the potential advantages of CDs in agricultural application.
研究领域:
农业
·
植物生理学
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环境科学
·
土壤学
·
纳米技术
✓ 已验证
产品关联
DOI
PubMed
高影响因子
Journal of Environmental Chemical Engineering
·
2025
·
IF 7.2
Yalin Zhang,Meng Lyu,Yanhui Dou,Xinlong Liu,Zongzeng Yang,Xiaoyuan Liao
The development of degradable plastic has emerged as a critical strategy to address plastic pollution. This study focuses on polybutylene adipate terephthalate (PBAT) as the subject of investigation, systematically exploring its degradation behavior and microbial mechanisms in soil environments. Microorganisms such as Escherichia coli ( E. coli ), Staphylococcus aureus ( S. aureus ), and Bacillus flexus ( B. flexus ) were introduced, and the degradation efficiency and mechanisms of PBAT were analyzed under varying conditions of temperature (45, 55, and 65 ℃), ventilation (100 and 200 mL/min), and burial depth. The experimental results revealed that E. coli , under 100 mL/min ventilation at 55 ℃, exhibited the highest degradation efficiency, with a weight loss rate of 16.45% in 30 days, significantly outperforming the other strains ( S. aureus : 12.49%; B. flexus : 3.54%). It was found that the presence of surface cracks and ester bond (C=O, 1710 cm⁻¹) rupture by SEM and FTIR analysis, and degradation occurs preferentially in the amorphous zone and that crystallinity increases throughout the degradation process by XRD and DSC results. This study elucidates PBAT degradation was catalyzed by microorganisms through the secretion of key enzymes providing a novel foundation for optimizing the environmental application of degradable plastic and advancing green technology development.
研究领域:
环境科学
·
高分子科学
·
微生物学
·
材料工程
·
生物技术
✓ 已验证
产品关联
DOI
高影响因子
ACS Applied Bio Materials
·
2024
·
IF 4.6
Shuang Sun,Yongyao Tan,Qikuan Cheng,Yuchen Cai,Jiaqi Zheng,Wei Wang,Lingjuan Xu,Guigang Li,Dong Wang,Lu Zhang,Yunming Wang
Flexible and wearable pressure sensors have attracted significant attention in the fields of smart medicine and human health monitoring. Nevertheless, the design and fabrication of degradable disposable pressure sensors still face urgent challenges. Herein, we fabricated poly(3-hydroxybutyrate) (PHB)-reinforced chitosan (CS) piezoelectric films for intelligent sensors through a simple, low-cost, and environmentally friendly roll-forming method. The results show that PHB doping successfully increased the effective piezoelectric coefficient of the chitosan-based film from 40.12 to 49.38 pm/V (a 23% increase). Simultaneously, the pressure sensor based on the CS/PHB film exhibited excellent response sensitivity (484 mV/kPa) and a wide linear response range (0–130 kPa), which could be used as haptic sensors and motion monitoring sensors for the fast response to human motion signals. Additionally, the CS/PHB film could be completely degraded within 18 days in a natural soil environment, demonstrating outstanding degradability. Therefore, chitosan-based piezoelectric films with excellent biodegradability and piezoelectric characteristics have been successfully fabricated in this work, which will promote the innovative development of green chitosan-based electronic devices and disposable pressure sensors.
研究领域:
材料科学
·
生物医学工程
·
环境科学
·
传感器与执行器
✓ 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）