Soil Ecology Letters
·
2024
·Vol. 6
·期 4
·1-8
·
IF 4.5
Liang Fang,Li Zhu,Wang Zinan,Ke Xin,Wu Longhua,Christie Peter,Luo Yongming
Egg hatching of the soil collembolan Folsomia candida and the effects of per- and polyfluoroalkyl substances were investigated.
New and effective laboratory methods for egg hatching studies with soil collembolans were established.
Per- and polyfluoroalkyl compounds (PFASs) have been used industrially worldwide and are persistent organic pollutants in many soils. Twenty eggs laid by synchronized adults of the collembolan Folsomia candida were added to each Petri dish containing compressed soil substrate mixed with perfluorooctanoic acid (PFOA), heptafluorobutyric acid (PFBA), or 6:2 chlorinated polyfluoroalkyl ether sulfonic acid (F-53B), and after 25 d of exposure the number hatched declined on average by 6.9%–49.7%, 10.3%–24.1%, and 3.4%–18.6%, respectively. PFASs delayed the peak of hatching by one day, and at different concentrations reduced the number of eggs hatched during the peak by 16.7%–30% and 23.3%–43.2% in PFOA and PFBA treatments, respectively. In the presence of F-53B the number of eggs hatched declined by 73.3% but the number of individuals increased by 29.3% at higher concentrations. The characteristics of egg hatching were stable and sensitive to PFASs, and may be suitable for use as indicators in the screening of contaminated soils for environmental risk assessment.
研究领域:
生态毒理学
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环境科学
✓ 已验证
产品关联
DOI
高影响因子
Algal Research-Biomass Biofuels and Bioproducts
·
2024
·
IF 4.6
Luqiu Lin,Jianhui Zeng,Chuxuan Zhang,Zhengkang Peng,Xun Gong
This study reports the transformation of three typical heavy metals (As(III), Hg(II), and Pb(II)) during the process for magnetic harvesting and subsequent liquefaction in ethanol of microalgae. The magnetic harvesting process of Chlorella Vulgaris (CV) was simulated using a co-precipitation method, achieving the highest magnetic harvesting ratio of 98.95 % at a pH of 8 and an iron-algae ratio of 0.4 g/g. Then the magnetically harvested CV was subjected to liquefaction in ethanol to explore the speciation and migration of As(III), Hg(II), and Pb(II). The environmental risk assessment of above three heavy metals in the bio-oil and biochar was assessed according to the Risk Assessment Code (RAC). Hg(II) and Pb(II) were found to be effectively stabilized and immobilized in the biochar, while As(III) exhibited a propensity to migrate into the bio-oil and existed mostly in the dangerous speciation such as fraction associated with Fe and Mn oxides and fraction bound to organic matter. It reflects a high environmental risk and necessitates a pre-removal treatment.
研究领域:
环境科学
·
生物技术
✓ 已验证
产品关联
DOI
高影响因子
ENVIRONMENTAL TECHNOLOGY
·
2021
·
IF 3.247
Yan-Qin Yang,Min-Hua Cui,Jian-Chao Guo,Jing-Jing Du,Zhi-Yong Zheng,He Liu
In this study, biochars were produced by co-pyrolysis of rice husk and sewage sludge, the environmental risk of heavy metal (Pd and Cd) in the biochars was assessed. Co-pyrolysis resulted in a lower yield but a higher C content compared with sewage sludge pyrolysis alone, the relative contents of Pb and Cd in biochars were declined. Co-pyrolysis process transformed the bioavailable heavy metals into stable speciation. The environmental risk assessment codes of Pb and Cd were reduced by 1–2 grades. The co-pyrolysis technology provides a feasible method for the safe disposal of heavy metal-contaminated sewage sludge.
研究领域:
环境科学
·
土壤学
✓ 已验证
DOI
PubMed
高影响因子
Environmental Science-Processes & Impacts
·
2014
·Vol. 16
·期 6
·1462-1468
·
IF 0
Lin Duan,Lingfang Li,Zhu Xu,Wei Chen
Nano-sized nickel oxide (nano-NiO) is a new nanomaterial that has shown great promise in many areas of application. Understanding its environmental fate and effects is critical for minimizing the potential environmental implications of this new material due to incidental and accidental releases in the future. In this study, we observed strong adsorption of tetracycline to nano-NiO and found that the adsorption affinity can be further enhanced by Cu(II) ions – the observed distribution coefficient (Kd) values are 103.1 to 104.2 L kg−1 in the absence of Cu(II) and 103.0 to 105.5 L kg−1 in the presence of Cu(II); such adsorption affinities are even comparable to those of tetracycline to carbonaceous materials. The strong adsorptive affinities of nano-NiO for tetracycline are likely attributable to several mechanisms, including surface complexation, cation exchange, and electrostatic attraction. As a strong complexing agent, Cu(II) can significantly enhance adsorption of tetracycline by serving as a bridging agent between tetracycline and nano-NiO. The findings of this study have important implications for the risk assessment of engineered nanomaterials – in aquatic environments nano-NiO (and likely other metal oxide nanomaterials) can strongly adsorb tetracycline antibiotics, resulting in the changes of environmental risks of the metal oxide nanomaterials and/or bioavailability of the adsorbed contaminants.
研究领域:
环境科学
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纳米技术
✓ 已验证
DOI
SCIENCE OF THE TOTAL ENVIRONMENT
·
2020
·
IF 6.551
Qiuyan Zhu,Yang Yang,Zhiting Lao,Yingying Zhong,Kun Zhang,Suqing Zhao
Photochemical methods attracted much research interests for their high-efficiency and low secondary pollution. Decomposition of synthetic pyrethroids , the fourth major group of insecticides in use worldwide, was also of great significance due to their possible environmental risks. The photodegradation of deltamethrin , permethrin and dihaloacetylated heterocyclic pyrethroids in methanol/acetone = 9/1 (by volume) by a 400 W mercury lamp was examined. The t 1/2 of tested pyrethroids was less than 25 min, except for cis -permethrin with a t 1/2 of up to 50 min. The trans -isomer of permethrin and compound DCA-01 with a smaller t 1/2 might be more susceptible to degradation than their cis -isomer. Besides, the photodegradation of pyrethroids was divided into twelve pathways including isomerization , ester hydrolysis, ester bond cleavage, C O bond cleavage, 3,3-dimethylacrylate formation, double bond break, C1-C3 bond cleavage in cyclopropyl, reductive dehalogenation, decarboxylation , nucleophilic reagents attack on lone pair electrons on oxygen atoms in the phenyl ether, cyano hydrolysis, and halogenated hydrocarbon hydrolysis. The ECOSAR program displayed that pyrethroids and most of their photodegradation products were toxic to fish, daphnid, green algae . Particularly, some photodegradation products were more harmful to aquatic organisms than their parents.
研究领域:
环境科学
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毒理学
·
化学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
ACS Sustainable Chemistry & Engineering
·
2019
·
IF 6.97
Weichen Wang,You Liang,Jiale Yang,Gang Tang,Zhiyuan Zhou,Rong Tang,Hongqiang Dong,Jianqiang Li,Yongsong Cao
Mesotrione is one of the triketone herbicides that are widely used in corn fields to control broadleaf and some grass weeds because of its high herbicidal activity and crop safety. However, mesotrione is unstable during the progress of storage and application and can easily enter the groundwater to cause environmental pollution due to its high leakage in soil. In this study, 22 new salts based on mesotrione, most of which were defined as herbicidal ionic liquids (HILs), were synthesized by pairing with different structural cations to optimize the physicochemical properties for solving these problems of mesotrione. The results showed that the water solubilities of HILs were no longer limited by pH and could be decreased by selecting suitable paired cations. Also, HILs exhibited a higher thermal stability, lower surface tension, higher octanol–water partition coefficient, and better soil adsorption capacity and herbicidal activity than mesotrione. HIL-22 paired with cetylpyridinium could meet the requirements such as efficacy control, thermal stability, and reduction of environmental risk based on the physicochemical properties and biological activities. This study showed the novel HILs could make contributions to solve the problems existing in the practical applications and reduce the negative impact of herbicides on the environment.
研究领域:
农业科学
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环境科学
·
化学
✓ 已验证
产品关联
DOI
高影响因子
INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH
·
2023
·
IF 4.2
Xuqian Wang,Wendan Zheng,Wenhua Tong,Aimin Zhang,Yongkui Zhang,Yabo Wang
Organophosphorus esters (OPEs) are important chemicals functioning as extractants, plasticizers, flame retardants, solvents, additives, etc., and are also recognized as hazardous organic liquids generated from industrial processes. Herein, we developed a CeO2-catalyzed degradation with simultaneous phosphorus immobilization technology to treat typical OPE solvents. Under the investigated reaction conditions of a temperature of 180 °C, a reaction time of 3 h, and a dosage of ball-milled CeO2 of 19.8 g mL–1 of the OPE, the model pollutant of tributyl phosphate (TBP) was efficiently degraded with phosphorus immobilization efficiency near 100%. Meanwhile, the mineralization efficiency of TBP was also as high as 98%, which was reflected by the chemical oxygen demand change of liquid products. Gaseous products generated from CeO2-catalyzed TBP degradation could also fulfill the requirements of an environmental standard. Further mechanism studies indicated that the surface oxygen vacancy in CeO2 induced the in situ formation of superoxide radicals, which dominated TBP degradation. During catalytic degradation, the P-containing species were mainly immobilized as cerium phosphate, while the hydrocarbon chains of TBP were degraded into small molecules and finally mineralized into inorganic species. The developed CeO2-catalyzed OPE degradation approach was also applicable to aromatic and halogenated OPEs, i.e., tricresyl phosphate and tris(2-chloroethyl) phosphate. This study provided a possible alternative for waste treatment of the waste of OPEs with low environmental risks.
研究领域:
环境科学
·
化学工程
✓ 已验证
产品关联
DOI
高影响因子
PROCESS SAFETY AND ENVIRONMENTAL PROTECTION
·
2021
·
IF 6.158
Junyuan Guo,Chongrui Yuan,Ziyu Zhao,Qianlan He,Hengbing Zhou,Ming Wen
Washing is one of the most practical remediation methods for heavy metals contaminated soil, however, conventional washing agents always cause soil acidification and salinization and bring about other negative impacts on soil microbes and plants. This study selected glutamate-N,N-diacetic (GLDA) and polyaspartic (PASP) as biodegradable chelators to remove Cd, Pb and Zn from contaminated farmland soil. The residual metals’ leachability , bioaccessibility , environmental risk and the properties of the soil were investigated after the polluted soil was washed with GLDA and PASP. Results showed that 93.8% of Cd, 87.9% of Pb and 91.9% of Zn were washed out when the concentration of GLDA was 50 mmol/L, pH was 5.5, S/L ratio was 1:10 and contact time was 90 min. Meanwhile, compared with the original soil, the leachability and bioaccessibility of the residual metals were decreased and the stability was increased after washing by GLDA or PASP. The environmental risks of metals were decreased as well by decreasing their bioaccessible concentrations. Moreover, the activity of the soil enzyme was improved after leaching. To sum up, this study provided a theoretical and scientific basis for the treatment of soil heavy metals pollution with biodegradable chelator.
研究领域:
环境科学
·
土壤学
✓ 已验证
DOI
高影响因子
Agronomy-Basel
·
2024
·Vol. 14
·期 2
·352
·
IF 3.3
Zihao Ye,Dihao Xu,Jiawen Zhong,Shuang Gao,Jinjin Wang,Yulong Zhang,Huijuan Xu,Yongtao Li,Wenyan Li
The co-transport of contaminants by soil colloids can generate substantial environmental risk, and this behavior is greatly affected by environmental conditions. In this study, AF4-ICP-MS was used to investigate the size distribution and composition of Cd/Pb-bearing colloids; saturated sand column experiments were used to investigate the impact of soil colloids on the transport of Cd/Pb under different pH and ionic strength conditions. AF4-ICP-MS characterization showed that natural colloids were primarily associated with two sizes ranges: 0.3–35 KDa (F1, fine nanoparticles) and 280 KDa–450 nm (F2, larger nanoparticles), which mainly consisted of organic matter (OM), iron (Fe), and manganese (Mn) (oxy)hydroxides and clay minerals. Fine nanoparticles could strongly adsorb Cd and Pb under all environmental conditions. Mn and Fe (oxy)hydroxides generally formed under neutral to alkaline conditions and exhibited adsorption capabilities for Cd and Pb, respectively. Transport experiments were conducted under different pH and ionic strength conditions. At pH 3.0, soil colloids had little effect on the transport of Cd2+and Pb2+. At pH 5.0, soil colloids inhibited the transport of Cd2+by 16.1%, and Pb2+recovery was still 0.0%. At pH 7.0 and 9.0, soil colloids facilitated the transport of Cd2+by 15.6% and 29.6%, facilitated Pb2+by 1.3% and 6.4%. At an ionic strength of 0, 0.005, and 0.01 mol L−1NaNO3, soil colloids facilitated the transport of Cd2+by 77.7%, 45.8%, and 15.6%, only facilitated the transport of Pb2+by 46.2% at an ionic strength of 0 mol L−1NaNO3. At an ionic strength of 0.05 mol L−1NaNO3, soil colloids inhibited the transport of Cd2+and Pb2+by 33.1% and 21.0%, respectively. The transport of Cd2+and Pb2+facilitated by soil colloids was clearly observed under low ionic strength and non-acidic conditions, which can generate a potential environmental risk.
研究领域:
环境科学
·
土壤学
✓ 已验证
产品关联
DOI
高影响因子
Frontiers of Environmental Science & Engineering
·
2025
·Vol. 19
·期 4
·1-13
·
IF 6.4
Jiang Linke,Li Yong,Shi Shuiqin,Yan Junmei,Chi Lianbao,Liu Hui,Feng Mingbao
Chlorinating wastewater before it is released into surface water can change the fate of organic pollutants. This transformation is influenced by chlorine residues, bromine-containing wastewater, and solar radiation. Losartan (LOS), one of the earliest sartan antihypertensive drugs produced, is used worldwide and has been found in the environment. However, its transformation mechanisms and environmental risks have not been systematically investigated. This research presents the degradation kinetics, transformation products, and environmental risks of LOS in different scenarios. The results revealed that k app, HClO (LOS) ranged from 0.47 to 8.30 L/(mol·s) at pH 5.0–8.0. The k app, HBrO (LOS) values at pH 5.0–8.0 ranged from 8.38 × 10 3 to 1.55 × 10 5 L/(mol·s), revealing a faster bromination reaction than chlorination. LOS degrades through direct photolysis, carbonate radicals (CO 3 / •− ), and singlet oxygen ( 1 O 2 ) under sunlight exposure. The solar/chlorination process accelerates the reaction rate through radical activity. In addition, chlorination and bromination resulted in halogen addition to the aromatic ring, whereas hydroxylation, hydrogen abstraction, demethylation, ring opening, and hydrolysis reactions were observed across all processes. Some products exhibit high biodegradation resistance and high toxicity, potentially threatening the aquatic environment. This study aims to enhance our understanding of the environmental behavior and resulting risks of LOS by exploring its environmental fate through various transformation processes.
研究领域:
环境科学
·
药理学
✓ 已验证
DOI
高影响因子
INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH
·
2013
·
IF 2.206
Yucui Hou,Yuehong Ren,Wei Peng,Shuhang Ren,Weize Wu
Phenolic compounds, which are important substances in industry, are mainly derived from coal liquefaction oil, coal tar, and petroleum, and also from biomass via pyrolysis. However, the traditional process of separation of phenols from oil using water, NaOH, and H2SO4 causes serious environmental problems. In this work, imidazolium-based ionic liquids (ILs) were used to extract phenol from a model oil of hexane and phenol in order to reduce environmental risk. It was found that these ILs could successfully separate phenols from hexane, and a small amount of [Bmim]Cl, equimolar to that of phenol in hexane, was enough to extract phenol with a high extraction efficiency of 99%. Anions of imidazolium-based ILs have a significant influence on the phenol extraction efficiency, which follows the order: Cl– > Br– > BF4– > PF6–. But the cation of these ILs shows a relatively small influence on the extraction. Particularly, [Bmim]Cl shows best performance in terms of phenol extraction efficiency. Furthermore, it is not sensitive to temperature changes and can be performed at ambient temperature. The extracted phenol in ILs could be recovered by evaporation, and the regenerated ILs could be reused for four cycles with no obvious loss in the phenol extraction efficiency. [Bmim]Cl was also used to extract phenols from real coal liquefaction oil, and the extraction efficiency of phenols could reach 90%.
研究领域:
化学工程
·
环境科学
✓ 已验证
产品关联
DOI
高影响因子
CHEMOSPHERE
·
2021
·
IF 7.086
Peng Liu,Xiaowei Wu,Huanhuan Shi,Hanyu Wang,Hexinyue Huang,Yanqi Shi,Shixiang Gao
Microplastics (MPs) in the environment would undergo extensive weathering, which can act as a vector affecting the accumulation of pollutants in organisms. However, the risk of organic pollutants adsorbed on aged MPs to marine organisms is poorly understood. This study revealed the contribution of aged polystyrene (PS) MPs to the total bioaccumulation of atorvastatin (ATV) and amlodipine (AML), and assessed the environmental risks via experimental and model analysis. The results showed that pharmaceuticals were more easily released in gastrointestinal fluids from aged MPs relative to that in simulated seawater. The hydrophobic pharmaceuticals were more bioaccessible than hydrophilic ones by organisms. Model analysis showed that ingestion of water and food were the most important uptake routes for pharmaceuticals in marine fish and seabirds, while aged PS MPs could decrease the bioaccumulation of pharmaceuticals (contributed for −2.9% and −1.2% for the total uptake of ATV, and −25.8% and −4.4% for AML), indicating the cleaning effect of aged MPs, and the potential higher exposure risks of pharmaceuticals in warm-blooded organisms than that in cold-blooded ones via ingested MPs. The study revealed the effect of aged MPs to the bioaccumulation of pharmaceuticals in marine organisms, and highlighted the combined risks of aged MPs and pharmaceuticals in the environment.
研究领域:
海洋生物学
·
环境科学
·
毒理学
✓ 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）