CHEMOSPHERE
·
2022
·
IF 8.943
Xupeng Wang,Bing Gong,Erkai He,Willie J.G.M. Peijnenburg,Hao Qiu
Awareness of toxicokinetics at the subcellular level is crucial to deciphering the underlying intoxication processes of metal(loid)s, although this information is often lacking. Here, the toxicokinetics of two non-essential metal(loid)s (Cd and As) and one essential metal (Zn) in both the whole body and subcellular fractions of earthworm ( Eisenia fetida ) were assessed. Earthworms were exposed to natural soils originating from a gradient of metal(loid) pollution for 14 days followed by a 14-day elimination phase in clean soil. Clearly distinct toxicokinetic patterns were found in the earthworms according to the metal(loid) considered. An obvious concentration-dependent increase was observed in earthworms or subcellular compartments where no equilibrium was reached (with slow or no elimination) for Cd and As throughout the experiment. As for Zn, the earthworms were able to retain a steady-state concentration of Zn in its body or each fraction without a clear intake behavior via the dynamic trade-off between uptake and elimination at different pollution levels. These differences in toxicokinetics at the subcellular level supported the observed differences in bioaccumulation patterns and were indicative of the strategy by which non-essential and essential elements are handled by earthworms. Notably, the concentration of Cd and As in subcellular compartments showed the same pattern as for Zn in the order of cellular cytosol > cellular debris > metal-rich granules, which might be associated with the binding of non-essential/essential elements with metallothionein enriched in the cytosol. Our findings enhance the understanding of the underlying mechanisms for metal(loid) accumulation kinetics in earthworms from the perspective of subcellular partitioning, and will be beneficial for accurate risk assessment of Cd, As, and Zn.
研究领域:
环境科学
·
毒理学
✓ 已验证
DOI
PubMed
高影响因子
WATER AIR AND SOIL POLLUTION
·
2016
·Vol. 227
·期 8
·1-10
·
IF 1.551
Chen Zhenhe,Li Guoao,Sun Liquan,Li Ye
Metal cations could enhance the sorption of tetracyclines but sometimes the effects are negligible. It is still not clear how these metals produce different effects. In this study, the sorption of chlortetracycline (CTC), tetracycline (TC), and oxytetracycline (OTC) was performed in the presence of Cd (II) to reveal the unknown mechanisms with two river sediments. It is found that Cd (II) could enhance the sorption of TCs on sediment SS, while it is negligible on sediment SY. For different tetracyclines, the enhancement effect by Cd (II) was more significant for CTC, while it is inferior for OTC and TC. Sorption isotherms of Cd (II) under strong and weak background electrolyte and pH decrease of sorption solutions indicate specific sorption is major on SY and cation exchange is significant on SS. Consequently, specific sorption is unfavorable for the enhanced sorption of TCs in the presence of Cd (II) because it is not favorable for the sorption of Cd-TCs by complexation and cation exchange. By the theoretical calculations, it is found that the significant enhancement of CTC is due to the higher electron affinity of Cd-CTC complex than the others to the surface groups. In conclusion, TCs sorption will not be affected by Cd (II) on sediments or soils with strong specific sorption characters of Cd (II).
研究领域:
环境科学
·
土壤学
✓ 已验证
DOI
高影响因子
TALANTA
·
2024
·
IF 5.6
Junhua Chen,Xu Wang,Yiwen Lv,Manjia Chen,Hui Tong,Chengshuai Liu
The available heavy metals in soil samples can cause the direct toxicity on ecosystems, plants, and human health. Traditional chemical extraction and recombinant bacterial methods for the available heavy metals assay often suffer from inaccuracy and poor specificity. In this work, we construct half adder and half subtractor molecular logic gates with molecular-level biocomputation capabilities for the intelligent sensing of the available lead (Pb) and cadmium (Cd). The available Pb and Cd can cleave DNAzyme sequences to release the trigger DNA , which can activate the hairpin probe assembly in the logic system. This multifunctional logic system can not only achieve the intelligent recognition of the available Pb and Cd according to the truth tables, but also can realize the simultaneous quantification with high sensitivity, with the detection limits of 2.8 pM and 25.6 pM, respectively. The logic biosensor is robust and has been applied to determination of the available Pb and Cd in soil samples with good accuracy and reliability. The relative error (Re) between the logic biosensor and the DTPA + ICP-MS method was from −8.1 % to 7.9 %. With the advantages of programmability, scalability, and multicomputing capacity, the molecular logic system can provide a simple, rapid, and smart method for intelligent monitoring of the available Pb and Cd in environmental samples.
研究领域:
环境科学
·
生物化学
✓ 已验证
DOI
PubMed
高影响因子
MOLECULES
·
2025
·Vol. 30
·期 10
·2160
·
IF 4.6
Ke Li,Yanfang Ren,Xuejie Dong,Xianyi Ping,Junyu He
The co-contamination of cadmium (Cd) and tetracycline (TC) in an agricultural environment poses significant risks to plant growth and food safety. This study investigated their combined effects on rice seedlings by analyzing growth parameters, nutrient uptake, photosynthetic pigment levels, antioxidant enzyme activities, nonenzymatic antioxidants, osmoregulatory substances, and secondary metabolites. Results showed that TC alleviated the inhibition of Cd on rice seedling growth by inhibiting Cd accumulation, enhancing nutrient element absorption, facilitating the synthesis of photosynthetic pigments, increasing the activities of antioxidant enzymes and nonenzymatic antioxidants, and the levels of osmoregulatory substances and secondary metabolites. The research provided critical insights into the antagonistic toxicological effects of TC and Cd co-contamination in rice, offering significant information for environmental risk assessments and strategies to alleviate the influence of these pollutants on crop health.
研究领域:
植物生理学
·
环境科学
✓ 已验证
DOI
PubMed
高影响因子
WATER AIR AND SOIL POLLUTION
·
2015
·Vol. 226
·期 5
·1-9
·
IF 1.554
Wang Qian,Liu Xiaoyan,Wang Chuanhua,Zhang Xinying,Li Hongbing,Chen Tingru,Hou Yunyun,Chen Xueping,Liang Xia
Four kinds of surfactants were used to increase accessibility of pyrene and cadmium (Cd) in simulated pyrene, Cd, and pyrene-Cd soils in this study. Tea saponin (TS) at 40 mg L −1 groups (exchangeable fraction of Cd and bioaccessible fraction of pyrene were 8.96 and 36.93 mg kg −1 ) showed more preferable potential application in improving solubilization capability than other surfactants. The morphology of Cd was transformed from Fe-Mn oxides (8.86 to 7.61 and 8.67 to 7.99 mg kg −1 in Cd and pyrene-Cd soil) and associated to carbonates fractions (4.46 to 4.36 and 4.28 to 4.36 mg kg −1 in Cd and pyrene-Cd soil) to exchangeable fraction with adding TS. These two morphological changes were important processes in the solubilization of Cd. The morphology of pyrene was transformed from associated fraction (72.15 to 61.95 and 71.02 to 63.48 mg kg −1 in pyrene and pyrene-Cd soil) to bioaccessible fraction (26.66 to 33.71 and 26.91 to 36.93 mg kg −1 in pyrene and pyrene-Cd soil) with adding TS. This morphological transformation was important in the improving of solubilization capacity of pyrene. In contrast, the solubilization of pyrene was promoted in the presence of Cd in pyrene-Cd soil (the bioaccessible fractions were 33.71 and 36.93 mg kg −1 in pyrene and pyrene-Cd soil), but the solubilization of Cd was hindered in the presence of pyrene (the exchangeable fractions of Cd were 8.86 and 8.67 mg kg −1 in Cd and pyrene-Cd soil). These findings will be beneficial for application of surfactants in soil remediation.
研究领域:
环境科学
·
土壤学
✓ 已验证
DOI
高影响因子
BIOLOGICAL TRACE ELEMENT RESEARCH
·
2024
·
IF 3.4
Zhao Man,Xie Longqiang,Huang Wenbin,Li Meiling,Gu Xin,Zhang Wei,Wei Jintao,Zhang Niya
Cadmium (Cd) and lead (Pb) are heavy metals prevalent in the environment and feed, and they reduce production performance of domestic animals, as well as they result in residue in animal tissues. The kidney is the target tissue for Cd and Pb. And the kidney is crucial for the reabsorption of calcium (Ca), which consequently influences bone strength. However, there are relatively few studies related to the effects of Cd and Pb exposure on performance, bone strength and kidney damage in livestock. The purpose of this experiment was to explore the combined effect of Cd and Pb on growth performance and renal impairment and the possible underlying mechanism. For this, 168 1-day-old Ross 308 broilers were randomly divided into four groups of six birds each, with seven replicates in each group: control group, 50 mg Cd/kg body weight group, 200 mg Pb/kg body weight group and 50 mg Cd/kg body weight + 200 mg Pb/kg body weight group. Feed intake was recorded daily and body weight was recorded weekly. The results show that at the end of the 3rd and 6th week, one broiler from each replicate was randomly selected for sampling. Boilers co-exposed to Cd and Pb for 3 weeks and 6 weeks had significantly decreased average daily feed intake (ADFI) and average daily body weight gain (ADG) than the control group, and the ratio of feed-to-weight gain (F/G) significantly increased after 6 weeks of co-exposure to Cd and Pb. Microscopic picture and ultrastructure analyses of the kidneys showed that Cd and Pb caused kidney damage to broiler chickens, and the damage was more serious in the Cd + Pb group, which was manifested by increased renal tubular epithelial degeneration and increased interstitial stasis points. Dietary exposure to Cd and Pb impaired production performance and induced renal oxidative damage in broilers. The combined effects of Cd and Pb on the kidneys are greater than their effects alone. The PERK-ATF4 pathway mediated endoplasmic reticulum stress participates the renal oxidative damage during chronic Cd and Pb exposure.
研究领域:
动物科学
·
毒理学
·
营养学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
Scientific Reports
·
2022
·Vol. 12
·期 1
·1-8
·
IF 4.996
Li Hongchuan,Kong Deming,Zhang Borui,Kalkhajeh Yusef Kianpoor,Zhao Yingying,Huang Jieying,Hu Hongxiang
The use of degradable chelating agents to facilitate phytoextraction is a promising low-cost method for the remediation of heavy metal-contaminated soils. However, there are few studies on how plants and soils respond to the chelating agents. In this study, the responses of French marigold ( Tagetes patula L.) and soil cadmium (Cd) to the chelator tetrasodium glutamate (GLDA) was investigated in a 180 d field trial. Five GLDA treatments (0, 292.5, 585, 1170, and 2340 kg hm −2 ) were carried out in a Cd-contaminated soil (0.47 mg kg −1 ) under French marigold plantation. The results showed that the application of GLDA promoted the transformation of other forms of Cd in soil to exchangeable state, and the exchangeable Cd and Fe–Mn oxide bound state increased by 42.13% and 32.97% ( p < 0.05), respectively. The cell wall Cd accumulations significantly increased 9.39% ( p < 0.05) and the percentages of soluble fractions increased by 460.33% ( p < 0.05). Furthermore, increases occurred in soil pH, as well as DOC and DTPA-Cd contents with increasing the total amount of GLDA. The composite application of GLDA (2340 kg hm −2 ) with French marigold reduced the total soil Cd content by 7.59% compared with the soil background. Altogether, results of this study suggested that the application of GLDA can effectively activate soil Cd and enhance the capability of French marigold for the remediation of Cd-contaminated soils.
研究领域:
环境科学
·
植物学
✓ 已验证
DOI
PubMed
高影响因子
HYDROMETALLURGY
·
2020
·
IF 3.338
Xi Chen,Xincun Tang,Zhihao Rong,Liping Wu,Pin Deng,Yang Wang,Xing Li,Liuchun Huang,Wei Dang
This paper presents an eco-friendly method for recovery of cadmium by solvent extraction and stabilization of arsenic through one-pool treatment on arsenic-rich flue dust. The morphology-controlled scorodite can be realized by adjusting reaction temperature. It is worth emphasizing that the arsenic-immobilized scorodite precipitates have superior crystallinity which exhibit excellent safety for long-term storage. In addition, the advantage brought about by taking hydrogen peroxide as leaching agent is that leachate is weakly acidic, which removes the need to add a large amount of neutralizing agent and facilitates the synthesis of scorodite. The results show that 97.3% of arsenic was leached from arsenic-rich flue dust and then 92.8% of the leached arsenic was transferred into scorodite with the recovery of 81.5% of cadmium under the optimal conditions. We hope that this work will provide a facile and environmentally friendly protocol for those interested in developing a new strategy for simultaneously recovering and stabilizing toxic heavy metal ions from industrial dust.
研究领域:
环境科学
·
冶金工程
✓ 已验证
产品关联
DOI
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2020
·
IF 10.652
Shunli Wan,Chunlei Yu,Yan Li,Zhongxiang Lu,Yuchen Wang,Yan Wang,Feng He
Advanced treatment of heavy metals from various types of water is challenging but of great urgency due to their serious threat to water quality security. In this study, a new magnetic hybrid adsorbent with the core-shell structure, which is denoted as Fe 3 O 4 @SiO 2 @MO, was prepared by successively covering SiO 2 and manganese oxide (MO) on Fe 3 O 4 . The covered SiO 2 was designed to protect the magnetic core Fe 3 O 4 from acid corrosion in practical application. The Fe 3 O 4 @SiO 2 @MO can be separated from solution within 10 s using an external magnetic field and very quickly remove Cd(II) and Cu(II) with equilibrium time below 10 min due to its special coating structure, which sharply reduces the diffusion distance of two metals before adsorption. Their effective coefficients of intraparticle diffusion (D) were determined to be 2.0 × 10 −10 and 8.5 × 10 −10 cm 2 s −1 . High levels of Ca(II) and Mg(II) inconspicuously affected the Cd(II) and Cu(II) retention onto Fe 3 O 4 @SiO 2 @MO, and only a decrease in removal below 20 and 12% for Cd(II) and Cu(II) occurred, respectively, due to the specific inner-sphere complexation between MO and the targeted metals. We preliminarily uncovered this interaction using XPS and FTIR analyses. Furthermore, in cyclic batch experiments, 1 kg Fe 3 O 4 @SiO 2 @MO can effectively treat 0.5 and 3.25 m 3 of Cd(II)- and Cu(II)-contaminated wastewater to satisfy their corresponding discharge standards, respectively, which is equivalent to 500 and 3250 folds of its own weight. All results validate that Fe 3 O 4 @SiO 2 @MO is a promising engineered magnetic adsorbent to decontaminate heavy-metal-polluted wastewater.
研究领域:
环境科学
·
材料科学
✓ 已验证
产品关联
DOI
高影响因子
SCIENCE OF THE TOTAL ENVIRONMENT
·
2020
·
IF 6.551
Jinfeng Tang,Minhua Su,Lezhang Wei,Yongjun Wei,Jiawei Liang,Yingkui Liu,Yue Luo
Municipal solid waste incineration (MSWI) fly ash generally contains substantial toxic elements which can be easily released into the environment, giving rise to serious environmental contaminations. In order to dispose of these harmful fly ashes safely and feasibly, an advanced and reliable strategy is needed. This work presented an integrated method designed for recycling of valuable copper (Cu) and zinc (Zn) through hydrochloric acid leaching and sequential extraction (using LIX 860N-I and Cyanex 572 for Cu and Zn as extractants, respectively) and clean-up of cadmium (Cd) and lead (Pb) in consequential waste effluent by adsorption with a versatile material – bundle-like hydroxyapatite (B-HAP). The method was applied in the pilot scale tests with recovery yields of 95% and 61% for Cu and Zn, respectively. Additionally, satisfied removal efficiencies of Cd and Pb (over 95% for both) were realized, reaching the acceptable emission level for Cd and Pb in China. A scenario based on the latest MSW data in 2018 in Guangzhou was assessed through the integrated pilot experiment. The evaluation demonstrates a reduction of a $ 20.8 million cost; over 48.2 k GJ of energy consumption and 5800 tons of CO 2 emission can be reduced in 2018, comparing to that landfilled in hazardous waste sites, which reveals great benefits. The valuable metal recovery in combination with decontamination of toxic elements/substances as a complete and combined process gives a promising fly ash treatment strategy in future.
研究领域:
环境科学
·
冶金工程
✓ 已验证
产品关联
DOI
PubMed
高影响因子
CHEMOSPHERE
·
2019
·
IF 5.108
Min Chen,Yongfei Gao,Xiaoxue Bian,Jianfeng Feng,Weiqi Ma,Lin Zhu
Aquatic organisms are often exposed to time-varied concentrations of contaminants due to pulsed inputs in natural water. Traditional toxicology experiments are usually carried out in a constant exposure pattern, which is inconsistent with the actual environment. In this study, a refined toxicokinetic-toxicodynamic (TK-TD) model was used to study the toxic effects of Pb and Cd on zebrafish larvae under three pulse exposures with 2, 4, and 6 h, respectively. The parameter sensitivity analysis showed that J M, max had the greatest impact on the output of the model. Cd or Pb pulse exposure resulted in less death than constant exposure at the same time-weighted average (TWA) concentrations. Survival fraction in larvae under 6 h interval between two pulses of Pb or Cd was larger than that under 2 h and 4 h interval. Toxicity under constant exposure of Cd or Pb was greater than that under 2, 4, and 6 h interval pulse exposure because the cumulative Cd or Pb concentration in the body under constant exposure was greater than that under pulse exposure. The results also showed that the stochastic death (SD) model was more suitable than the individual tolerance (IT) model for predicting the survival fraction of larvae under pulse exposure to Pb and Cd, which was indicated by higher R 2 (0.670–0.940) in SD model than that (0.588–0.861) in IT model. Our model provides approaches for laboratory toxicity testing and modeling approaches for addressing the toxicity of heavy metal pulsed exposure.
研究领域:
生态毒理学
·
环境科学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
ChemSusChem
·
2019
·Vol. 13
·期 4
·756-762
·
IF 7.804
Guoqiang Zhang,Xiang Ling,Guoshuai Liu,Yangsen Xu,Shuning Xiao,Qitao Zhang,Xun Yang,Chuntian Qiu,Hongwei Mi,Chenliang Su
Graphical Defective is effective : A defective Zn–Cd–S photocatalyst is prepared on a large scale and used to perform water splitting with a high apparent quantum yield (5.0 % at λ =420 nm) towards H 2 evolution in a system without a cocatalyst or sacrificial agent. Solar-driven H 2 evolution is an essential process for sustainable energy development. Currently, the greatest challenge is the development of efficient photocatalysts to drive this reaction, especially in pure water systems (without the use of a sacrificial agent). In this study, structural defects in Zn–Cd–S nanorod photocatalysts are found to increase charge separation efficiency significantly by sevenfold. Efficient H 2 evolution (352.7 μmol h −1 g −1 , 100 mg of catalyst) is achieved by using this defective Zn–Cd–S nanorod photocatalyst in the absence of sacrificial agents and precious metal cocatalysts under visible-light irradiation. Thus, this cocatalyst- and sacrificial-agent-free, visible-light-responsive system shows remarkable potential as a new artificial photosynthesis route for green H 2 production.
研究领域:
材料科学
·
能源化学
✓ 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）