WATER AIR AND SOIL POLLUTION
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2023
·Vol. 234
·期 3
·1-12
·
IF 2.9
Liu Caiying,Liu Yanyan,Feng Jiapeng,Li Yaru,Tao Jun,Xie Xiaoxiao
The paper aims to evaluate the effectiveness of biochar prepared from the co-pyrolysis of rice husk and cow bone (RHCBC) for in situ remediation and amelioration of Cd-contaminated soil. Effects of RHCBC on Cd bioavailability in soil and Cd uptake in corn growth were investigated through cultivation experiments and pot experiments. The results showed that the addition of RHCBC in the Cd-contaminated soil achieved the increase of soil pH, CEC, and SOM, whereas the soil available Cd content was reduced by 29.08–51.06%, which was proved by the transformation of Cd from acid soluble and exchangeable state to residual state. Furthermore, the nutrient contents of soil were also increased by 82.41–230.09% for alkali-hydrolyzable N, 66.81–144.03% for available P, and 16.20–77.70% for available K, respectively, which promoted the growth of corn. Overall, it is a promising strategy to employ RHCBC for in situ remediation of Cd-contaminated soil and promotion of plant growth as efficient soil amendment.
研究领域:
土壤科学
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环境修复
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农业科学
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DOI
高影响因子
CHEMOSPHERE
·
2023
·
IF 8.8
Liang Tao,Wenjie Chen,Yuxin Liu,Feng Yang,Dong Liu,Junfen Liang,Saihong Liu,Hui Li
Soil acidification in southern China increases the environmental risk posed by heavy metals, especially cadmium (Cd), and has been accelerated by anthropic activities . Long-term fertilizer use increases the quantity of phosphate (P) in soils, which affects the biogeochemistry of heavy metals in soil environments. In this study, various analytical methods were used to investigate the critical mechanisms controlling P(V)–Cd(II) interactions with goethite (α-FeOOH, a typical iron oxide widely distributed in red soil areas) with added P(V)/Cd(II) in different molar ratios (to simulate the annual P fertilizer surplus). After excluding pH interference by using organic buffers, Cd(II) adsorption processes on α-FeOOH were found to be enhanced by the presence of P(V), whereas the Cd(II) adsorption type changed from single inner-sphere complexation to both inner- and outer-sphere complexation. The results of a zeta potential analysis, X-ray diffraction (XRD), high-resolution transmission electron microscopy (HRTEM) and X-ray photoelectron spectroscopy (XPS) showed different dominant mechanisms underlying the promotion of Cd(II) adsorption by P(V) at different P(V)/Cd(II) molar ratios. Electrostatic adsorption and the formation of ternary complexes were proven to be the critical mechanisms controlling the reactivity of Cd(II), where coprecipitation occurs at high P(V)/Cd(II) molar ratios and considerably enhances the fixation of Cd(II) and P(V). The mechanism for Cd(II) and P(V) coadsorption onto α-FeOOH under stable pH conditions was found to include both competitive and synergistic effects, and the results in this study show that more attention should be given to the impact of anthropic activities on the reactivity of heavy metals in the soil environment, especially farmland.
研究领域:
环境科学
·
土壤学
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DOI
PubMed
高影响因子
CHEMOSPHERE
·
2023
·
IF 8.8
Zigong Ning,Shuang Zhou,Pengxiang Li,Rong Li,Feihua Liu,Zilong Zhao,Nanqi Ren,Lu Lu
Biofilm-developed microplastics (MPs) may serve as important vectors for contaminants in aquatic environments. Elucidating the interactions between biofilm-developed MPs and coexisting contaminants is crucial for understanding the vector capacities of MPs. However, little is known about how the adverse effects of contaminants on MP surface-colonized biofilms influence their vector capacity. In this study, we aimed to investigate the interaction mechanism of biofilms colonizing the surface of MPs with coexisting contaminants using microcosm experiments and biofilm characterization techniques. The results indicated that the biofilm biomass on polystyrene increased over time, providing an additional abundance of oxygen-containing functional groups and promoting Cd accumulation by biofilm-developed polystyrene . Moreover, as a coexisting contaminant, Cd exerted adverse effects such as additional mortality of microorganisms and senescence and MP-colonized biofilm shedding. Consequently, the contaminant vector capacity of biofilm-developed MPs could be mitigated. Thus, the adverse effects of coexisting contaminants on biofilms influenced the ability of MPs to act as vectors in aquatic environments. Neglecting the negative effects of contaminants on biofilms may lead to an overestimation of the contaminant vector capacity of biofilm-developed MPs. This study provides support for more accurate assessment of the interactions between biofilm-developed MPs as vectors and contaminants in aquatic environments.
研究领域:
环境科学
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微生物学
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DOI
PubMed
高影响因子
CABI Agriculture & Bioscience
·
2023
·Vol. 4
·期 1
·1-8
·
IF 3.9
Huang Hexi,Di Ning,Wang Jie,Wang Yuxing,Zhu Zhengyang,Lu Caige,Wang Su,Zang Liansheng
The heavy metal, cadmium (Cd), causing growth retardation and yield reduction on rice and impacting the fitness of organisms inhabiting on rice through bottom-up effects, has become a great challenge to rice production. However, the effect of Cd-exposure on the development of an economically important and destructive rice pest, Chilo suppressalis remains unexplored. By exposing the larvae of C. suppressalis to different Cd-exposed artificial diets (0, 0.2, 1.0, 2.5, 5.0, and 10.0 mg/kg), we found that Cd exposure did not affect the larval duration or pupation rate of C. suppressalis , but caused negative effects on pupal weight at high Cd levels (5.0 and 10.0 mg/kg) and on adult deformity rate from 2.5 and 5.0 mg/kg treatments. Although Cd significantly increased the female pupae ratio, C. suppressalis did not oviposit when Cd treatment was more than 2.5 mg/kg. Meanwhile, Cd transferred to pupae, females, exuviae of pupa and eggs of C. suppressalis from Cd treated larvae, and exhibited a dose-dependent response on Cd accumulation. Our results indicated that Cd had a negative effect on rice stem borer and can be transferred to eggs of C. suppressalis , but more work is needed to further assess the bottom-up effect on third tropic levels in Cd-polluted fields.
研究领域:
生态毒理学
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昆虫学
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DOI
高影响因子
INTERNATIONAL JOURNAL OF MOLECULAR SCIENCES
·
2023
·Vol. 24
·期 15
·12157
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IF 5.6
Gui-Li Yang,Lei Huang,Xiao Yang,Zhu Li,Hai-Min Liao,Kang Mao,Zhao-Ju Liu,He-Yan Geng,Qin Cao,Ai-Juan Tan
Cadmium (Cd) is one of the most toxic metals in the environment and exerts deleterious effects on plant growth and production. Duckweed has been reported as a promising candidate for Cd phytoremediation. In this study, the growth, Cd enrichment, and antioxidant enzyme activity of duckweed were investigated. We found that both high-Cd-tolerance duckweed (HCD) and low-Cd-tolerance duckweed (LCD) strains exposed to Cd were hyper-enriched with Cd. To further explore the underlying molecular mechanisms, a genome-wide transcriptome analysis was performed. The results showed that the growth rate, chlorophyll content, and antioxidant enzyme activities of duckweed were significantly affected by Cd stress and differed between the two strains. In the genome-wide transcriptome analysis, the RNA-seq library generated 544,347,670 clean reads, and 1608 and 2045 differentially expressed genes were identified between HCD and LCD, respectively. The antioxidant system was significantly expressed during ribosomal biosynthesis in HCD but not in LCD. Fatty acid metabolism and ethanol production were significantly increased in LCD. Alpha-linolenic acid metabolism likely plays an important role in Cd detoxification in duckweed. These findings contribute to the understanding of Cd tolerance mechanisms in hyperaccumulator plants and lay the foundation for future phytoremediation studies.Keywords:cadmium;duckweed;heavy metals;hyperaccumulator;transcriptome
研究领域:
植物学
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环境科学
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分子生物学
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DOI
PubMed
高影响因子
JOURNAL OF HAZARDOUS MATERIALS
·
2023
·
IF 13.6
Mingwei Deng,Shengwang Wang,Huagang Huang,Daihua Ye,Xizhou Zhang,Yongdong Wang,Zicheng Zheng,Tao Liu,Tingxuan Li,Haiying Yu
Hydrogen peroxide (H 2 O 2 ) is a vital signaling molecule in response to cadmium (Cd) stress in plants. However, the role of H 2 O 2 on Cd accumulation in root of different Cd-accumulating rice lines remains unclear. Exogenous H 2 O 2 and 4-hydroxy-TEMPO (H 2 O 2 scavenger) were applied to investigate the physiological and molecular mechanisms of H 2 O 2 on Cd accumulation in the root of a high Cd-accumulating rice line Lu527–8 through hydroponic experiments. Interestingly, it was found Cd concentration in the root of Lu527–8 increased significantly when exposed to exogenous H 2 O 2 , while reduced significantly when exposed to 4-hydroxy-TEMPO under Cd stress, proving the role of H 2 O 2 in regulating Cd accumulation in Lu527–8. Lu527–8 showed more Cd and H 2 O 2 accumulation in the roots, along with more Cd accumulation in cell wall and soluble fraction, than the normal rice line Lu527–4. In particular, more pectin accumulation, especially low demethylated pectin, was observed in the root of Lu527–8 when exposed to exogenous H 2 O 2 under Cd stress, resulting in more negative functional groups with greater capacity to binding Cd in the root cell wall of Lu527–8. It indicated that H 2 O 2 -induced cell wall modification and vacuolar compartmentalization contributes greatly to more Cd accumulation in the root of the high Cd-accumulating rice line.
研究领域:
植物学
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环境科学
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DOI
PubMed
高影响因子
MOLECULES
·
2023
·Vol. 28
·期 17
·6344
·
IF 4.6
Shuanghui Wang,Chuhong Chen,Yan Lu
Cadmium (Cd), a harmful heavy metal that has no biological purpose, can harm healthy fetal and child development. Epigallocatechin-3-gallate (EGCG), the most abundant polyphenol in tea, has been shown to increase cell viability under Cd exposure and ameliorate Cd-induced kidney injury in adult male rats. Using theCaenorhabditis elegans(C. elegans) model, we demonstrated that EGCG mitigated Cd-induced body size developmental toxicity through a mechanism that did not involve chelation with EGCG and was not associated with Cd accumulation and efflux. Our research indicated that the beneficial effects of EGCG on Cd-induced body size developmental toxicity were associated with the mitigation of endoplasmic reticulum stress. Furthermore, our observations indicate that EGCG reduced Cd-induced developmental toxicity inC. elegansvia the PEK-1/eIF-2α/ATF-4 pathway. Our results provide important evidence for the potential benefits of consuming tea as a detoxification agent.Keywords:tea;EGCG;cadmium;Caenorhabditis elegans;developmental toxicity;endoplasmic reticulum stress
研究领域:
毒理学
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分子生物学
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DOI
PubMed
高影响因子
JOURNAL OF ENVIRONMENTAL MANAGEMENT
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2021
·
IF 6.789
Mao Gao,Fan Tang,Kaidi Wang,Fanjian Zeng,Yan Wang,Guangming Tian
The hyperaccumulating mechanism concerning heavy metal activation or passivation and plant response triggered by fulvic acid (FA) and humic acid (HA) recruitments are investigated herein. We carefully examine the Cd activation effect by various FA and HA, tracing from pig, goat, and duck manure composts to straw compost and commercial materials (i.e., PC, GC, DC, SC, and CM), as well as their roles in plant growth promotion and Cd uptake. Our results indicate that due to the decrease of soil pH and their multiple functional groups, the contents of available Cd (AE–Cd) increased by 4.3–4.8% and 3.6–6.3% when all FA and HA sources were applied for 30 days. A 13.1–19.9% increase in AE–Cd was observed when CFA , DFA , and PFA were applied for five days, and a 9.5% increment was found when PHA was applied for 10 days. In the pot experiment, the Cd accumulation in plants increased by 2.78 and 2.17 folds with PFA and PHA applications, respectively, compared to the blank control group. This result can be attributed to the stimulative effects of the simultaneous Sedum alfredii growth and Cd phytoavailability. Notably, the Cd accumulation increased by 2.26 times with the SFA amendment due to the predominant stimulation effect to the phytoavailable Cd rather than plant growth. However, slight inhibitory effects were observed upon plant growth or Cd uptake, which led to the reduction of the Cd accumulation with DHA, SHA, and CHA employments. Consistently, the corresponding soil Cd removal efficiencies were 43.5% and 34.6% with PFA and PHA, respectively, which hold abundant O- and N-containing groups. Our research aims to gain insights into the ternary interaction in the presence of heavy metal, humic substances , and S. alfredii to simultaneously accelerate Cd activation and hyperaccumulation .
研究领域:
环境科学
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土壤学
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植物科学
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DOI
PubMed
高影响因子
CHINESE CHEMICAL LETTERS
·
2019
·
IF 3.839
Yuan Liu,Taotao Li,Chuxuan Ling,Zhu Chen,Yan Deng,Nongyue He
An electrochemical sensor based on self-made nano-porous pseudo carbon paste electrode (nano-PPCPE) has been successfully developed, and used to detect Cd 2+ and Pb 2+ . The experimental results showed that the electrochemical performance of nanoPPCPE is evidently better than both glassy carbon electrode (GCE) and pure carbon paste electrode (CPE). Then the prepared nano-PPCPE was applied to detect Cd 2+ and Pb 2+ in standard solution, the results showed that the electrodes can quantitatively detect trace Cd 2+ and Pb 2+ , which has great significance in electrochemical analysis and detection. The linear ranges between the target ions concentration and the DPASV current were from 0.1–3.0 μmol/L, 0.05–4.0 μmol/L for Cd 2+ and Pb 2+ , respectively. And the detection limits were 0.0780 μmol/L and 0.0292 μmol/L, respectively. Moreover, the preparation of the nano-PPCPE is cheap, simple and has important practical value.
研究领域:
分析化学
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环境科学
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产品关联
DOI
高影响因子
SCIENCE OF THE TOTAL ENVIRONMENT
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2022
·
IF 10.753
Suzhen Huang,Zhikai Wang,Qixuan Song,Jun Hong,Tianyu Jin,Haiqing Huang,Zheng Zheng
Humic substances are widely present in aquatic environments. Due to the high affinity of humic substances for metals, the interactions have been particularly studied. To assess the effect of humic acid (HA) on submerged macrophytes and biofilms exposed to heavy metal stress, Vallisneria natans was exposed to solutions containing different concentrations of HA (0.5–2.0 mg·L −1 ), Pb 2+ (1 mg·L −1 ) and Cd 2+ (1 mg·L −1 ). Results suggested that HA positively affected the plant growth and alleviated toxicity by complexing with metals. HA increased the accumulation of metals in plant tissues and effectively induced antioxidant responses and protein synthesis. It was also noted that the exposure of HA and metals promoted the abundance and altered the structure of microbial communities in biofilms. Moreover, the positive effects of HA were considered to be related to the expression of related genes resulting from altered DNA methylation levels, which were mainly reflected in the altered type of demethylation. These results demonstrate that HA has a protective effect against heavy metal stress in Vallisneria natans by inducing effective defense mechanisms, altering biofilms and DNA methylation patterns in aquatic ecosystems.
研究领域:
环境科学
·
植物学
·
微生物学
·
遗传学
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DOI
PubMed
高影响因子
ECOTOXICOLOGY AND ENVIRONMENTAL SAFETY
·
2024
·
IF 6.2
Zijie Zhou,Yan Zhang,Yan Liu,Quanshu Wang,Shouhai Jiao,Shuping Zhang,Xiaolu Li,Li Sun
Maternal anemia has been identified as a contributing factor to adverse reproductive outcomes associated with cadmium (Cd) exposure, a common heavy metal. Our recent findings suggest that inhibited erythroid differentiation and enucleation also play significant roles in the direct embryonic toxicity resulting from maternal Cd exposure. However, the effects of Cd exposure on lipid metabolism remodeling, which is essential for physiological erythropoiesis, remain poorly understood. In the present study, pregnant mice were administered low doses of CdCl 2 via oral exposure from early to late gestation to mitigate Cd-induced maternal anemia. Compared to vehicle-treated controls, embryos from Cd-treated mice exhibited a slight decrease in weight, though without signs of atrophy. Consistent with our previous observations, fetal livers from Cd-exposed embryos demonstrated a dose-dependent inhibition of erythroid differentiation, as confirmed by ex vivo analysis. Notably, an intrinsic decrease in lipid peroxidation during erythroid differentiation was observed in the bone marrow and fetal livers of vehicle-treated mice, attributed to diminished lipid content. In contrast, this decrease in lipid peroxidation was absent in fetal liver erythroblasts from Cd-treated mice, where an increase in lipid peroxidation was instead noted. These findings elucidate a potential mechanism, lipid peroxidation, underlying Cd-induced embryonic toxicity.
研究领域:
毒理学
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生殖生物学
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血液学
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DOI
PubMed
高影响因子
JOURNAL OF ELECTROANALYTICAL CHEMISTRY
·
2024
·
IF 4.1
Haidong Xing,Xiangxiang Zhang,Siyao Zhai,Wei Mu,Chao Li,Xiaojun Han
The heavy metal ions pollution of the soil and water ecosystem resulted in thorny environmental issues throughout the world. Herein, a screen-printed electrode (SPE) with carbon ink mixed with bismuth/graphene oxide hybrid (Bi/GO-SPE) was successfully prepared to simultaneously determine Cd 2+ and Pb 2+ . The detection range of Cd 2+ is from 5 to 50 μg/L with the limit of detection (LOD) of 1.55 μg/L. The detection range of Pb 2+ is from 5 to 50 μg/L with LOD of 1.31 μg/L. When the Bi/GO-SPE detects Cd 2+ and Pb 2+ simultaneously, the linear detection range is from 5 to 50 μg/L, with LOD of 2.43 μg/L for Cd 2+ and 2.09 μg/L for Pb 2+ respectively. The Bi/GO-SPE exhibited favorable conductivity, exceptional stability, and robust anti-interference. The Bi/GO-SPE holds great potential in the detection of heavy metal ions in real water samples.
研究领域:
环境科学
·
分析化学
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产品关联
DOI
高影响因子
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