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Plasticisers in the terrestrial environment: sources, occurrence and fate 陆地环境中的增塑剂:来源、发生和命运
IF 4.3 4区 环境科学与生态学 Q2 Chemistry Pub Date : 2021-01-01 DOI: 10.1071/en21033
Alexis C. Billings, Kevin C. Jones, M. Pereira, D. Spurgeon
Environmental context. Many human activities cause the release of plastic and associated plasticisers to land, where chemicals may persist for extended periods and be taken up by organisms. However, quantitative information of the terrestrial occurrence, fate and exposure of phthalate and non-phthalate plasticisers is lacking. Research into this field is needed, especially as society moves away from phthalates to the next generation of plasticisers which may themselves represent an emerging risk. Abstract. Modern society is widely dependent upon plastic. Therefore, it is unsurprising that macro- and microplastic pollution is found in every environmental compartment on earth. Plasticisers are chemicals added to plastics to increase their flexibility. Like plastics themselves, plasticisers are also widely present in the environment. Plasticisers and plastic debris may undergo long-range transport in the atmosphere and the oceans, contaminating even the most remote areas of land. In addition, although plasticisers typically degrade in a matter of weeks–months, they can persist in soil for decades and have been shown to occur in all land uses studied. Some plasticisers are genotoxic and can be taken up by soil organisms, which may pose a risk to ecosystems and human health. To date the majority of data on plasticisers exists for phthalates. However, plasticisers are a diverse range of chemicals and with the increasing transfer to non-phthalate alternatives, research into the fate and effects of emerging plasticisers is required to determine their environmental risk and management options. Data on the occurrence and ecotoxicity of emerging plasticisers, in addition to the impacts of all plasticisers on terrestrial ecosystems, therefore, remain a key research need within the wider plastics debate. in the global fate and behaviour of persistent organic pollutants and chemicals management. Dr M. Glo´ria Pereira is the Head of the Centralised Chemistry Laboratories at UKCEH and the Head of the NEIF Lancaster Node. The team comprises 17 environmental chemists who carry out metals, nutrients, isotopes and organic analyses and the labs have ISO17025:2017 accreditation. Her research focuses on persistent organic pollutants at environmental levels as well as the identification of emerging compounds that can pose a risk to the environment, wildlife and humans.
环境背景。许多人类活动导致塑料和相关的增塑剂释放到陆地上,这些化学物质可能会在陆地上存留很长时间并被生物吸收。然而,缺乏关于邻苯二甲酸酯和非邻苯二甲酸酯增塑剂在陆地上的发生、命运和暴露的定量信息。这一领域的研究是有必要的,特别是当社会从邻苯二甲酸盐转向下一代增塑剂时,这些增塑剂本身可能代表着一种新的风险。摘要现代社会广泛依赖塑料。因此,在地球上的每个环境隔间中都发现宏观和微观塑料污染也就不足为奇了。增塑剂是添加到塑料中以增加其柔韧性的化学物质。就像塑料本身一样,增塑剂也广泛存在于环境中。增塑剂和塑料碎片可能在大气和海洋中进行远距离运输,甚至污染最偏远的陆地地区。此外,尽管增塑剂通常在几周到几个月的时间内降解,但它们可以在土壤中持续存在数十年,并且已被证明在所有研究过的土地使用中都会出现。一些增塑剂具有遗传毒性,可被土壤生物吸收,这可能对生态系统和人类健康构成风险。迄今为止,关于增塑剂的大部分数据都是关于邻苯二甲酸盐的。然而,增塑剂是多种多样的化学品,随着向非邻苯二甲酸盐替代品的转移越来越多,需要对新兴增塑剂的命运和影响进行研究,以确定其环境风险和管理方案。因此,关于新兴增塑剂的发生和生态毒性的数据,以及所有增塑剂对陆地生态系统的影响,仍然是更广泛的塑料辩论中的一个关键研究需求。在全球的命运和行为的持久性有机污染物和化学品管理。M. Glo´ria Pereira博士是UKCEH中央化学实验室的负责人,也是NEIF兰开斯特节点的负责人。该团队由17名环境化学家组成,他们进行金属、营养物质、同位素和有机分析,实验室通过了ISO17025:2017认证。她的研究重点是环境层面的持久性有机污染物,以及可能对环境、野生动物和人类构成风险的新兴化合物的识别。
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引用次数: 18
Production, distribution and flux of dimethyl sulfide in the East China Sea and its contribution to atmospheric sulfate aerosols 东海二甲基硫化物的产生、分布和通量及其对大气硫酸盐气溶胶的贡献
IF 4.3 4区 环境科学与生态学 Q2 Chemistry Pub Date : 2021-01-01 DOI: 10.1071/en21079
Jin-wei Wu, Feng Xu, Long Liu, M. Ren, Hong‐Hai Zhang, Guipeng Yang
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引用次数: 2
Evaluation of biomethane potential and kinetics modelling of green macroalgae from the South Atlantic Sea: Codium sp. (Codiaceae) and Ulva sp. (Ulvaceae) 南大西洋大型绿藻生物甲烷潜力评价及动力学模型:Codium sp. (Codiaceae)和Ulva sp. (Ulvaceae)
IF 4.3 4区 环境科学与生态学 Q2 Chemistry Pub Date : 2021-01-01 DOI: 10.1071/en21088
Daniela Giselle Ibarlucía, E. Santalla, V. Córdoba
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引用次数: 1
Effect of calcium nitrate dosing frequency on biological conditioning of sludge 硝酸钙投加频率对污泥生物调理的影响
IF 4.3 4区 环境科学与生态学 Q2 Chemistry Pub Date : 2021-01-01 DOI: 10.7524/J.ISSN.0254-6108.2019091904
Wang Yuhui, Wei Yanceng, Huang Qiujie, Xiao Jiamu, Zhu Nan‐wen
Degradable organics in the excess sludge can be decomposed and sped up by denitrifying bacteria with Ca(NO3)2 added, which can enhance the dewaterability of sludge. With the total NO3- dosage of 100 mg·g-1 TS, and the dosing frequencies of Ca(NO3)2 divided into 1, 2, 3 and 6 times during six days respectively, the dewaterability of sludge was observed. It was shown that the sludge CST could be reduced by 65.0%, the SRF was reduced by 73.2%, the protein in extracellular polymeric substance of sludge was reduced, and the protein in S-EPS and LB-EPS was reduced from 13.47 mg·L-1, 11.66 mg·L-1 to 0.52 mg·L-1, 1.43 mg·L-1respectiveLy, the Zeta potential tend to become electroneutral after Ca(NO3)2 added, which was helpful for improve sludge dewaterability. The results also indicated that sludge dewaterability could be improved greatly with Ca (NO3)2 added at one-time, since more nitrite could be produced, which could help release the microbial cytoplasm, the released organics in the microbial cytoplasm, could be used by denitrifying bacteria as carbon source.
过量污泥中的可降解有机物通过添加Ca(NO3)2的反硝化菌进行分解和加速,可增强污泥的脱水性。在NO3-总投加量为100 mg·g-1 TS、Ca(NO3)2投加频率分别为1、2、3、6次、6 d的条件下,观察污泥的脱水性能。结果表明,添加Ca(NO3)2后,污泥CST降低65.0%,SRF降低73.2%,污泥胞外聚合物质中的蛋白质含量降低,其中S-EPS和LB-EPS中的蛋白质含量分别从13.47 mg·L-1、11.66 mg·L-1降低到0.52 mg·L-1、1.43 mg·L-1, Zeta电位趋于电中性,有利于提高污泥的脱水性。结果还表明,一次性添加Ca (NO3)2可以大大提高污泥的脱水性,因为可以产生更多的亚硝酸盐,这有助于释放微生物细胞质,微生物细胞质中释放的有机物可以被反硝化菌用作碳源。
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引用次数: 0
Influence of CNT loading and environmental stressors on leaching of polymer-associated chemicals from epoxy and polycarbonate nanocomposites 碳纳米管负载和环境应力对环氧树脂和聚碳酸酯纳米复合材料中聚合物相关化学物质浸出的影响
IF 4.3 4区 环境科学与生态学 Q2 Chemistry Pub Date : 2021-01-01 DOI: 10.1071/en21043
I. Walker, M. Montaño, Ronald S. Lankone, D. Fairbrother, P. L. Ferguson
Nanoparticles such as carbon nanotubes are increasingly added to polymer matrices to improve tensile strength and electrical and thermal conductivity, and to reduce gas permeability. During use and after disposal, these plastic nanocomposites (PNCs) are degraded into microplastics by physical and chemical processes including mechanical abrasion, UV light exposure, hydrolysis and oxidation. Such polymers have the potential to enter aquatic environments and release potentially hazardous polymer-associated chemicals and transformation products. This work identifies and quantifies polymer-associated chemicals leached from polymers and nanocomposites during simulated environmental exposure. Epoxy and polycarbonate PNCs containing single-walled carbon nanotube (SWCNT) loadings ranging from 0 to 1 wt-% were exposed to water for 5 days, and the release of the chemicals bisphenol A (BPA) and 4-tert-butylphenol (TBP) was measured. The role of UV exposure, pH, temperature and natural organic matter in regulating chemical release was also investigated. Temperature, pH and UV light were found to be the most significant factors influencing release of TBP and BPA from PNCs. Additionally, increasing carbon nanotube loading in both polycarbonate and epoxy composites was found to decrease the release of these phenolic chemicals. A 0.3% higher SWCNT loading decreased the release of BPA 45 18%, and a 1 % SWCNT loading decreased chemical release from epoxy by 48 26% for BPA and 58 8% for TBP. This information provides important data that can be used to help assess the risks posed by SWCNT polymer nanocomposites in aqueous environments, particularly as they age and are transformed.
纳米颗粒(如碳纳米管)被越来越多地添加到聚合物基体中,以提高抗拉强度、导电性和导热性,并降低气体渗透性。在使用过程中和处理后,这些塑料纳米复合材料(pnc)通过物理和化学过程,包括机械磨损、紫外线照射、水解和氧化,降解成微塑料。这类聚合物有可能进入水生环境,释放出与聚合物相关的潜在危险化学品和转化产物。本研究确定并量化了在模拟环境暴露过程中从聚合物和纳米复合材料中浸出的聚合物相关化学物质。含单壁碳纳米管(SWCNT)的环氧树脂和聚碳酸酯pnc在水中暴露5天,测量化学物质双酚A (BPA)和4-叔丁基酚(TBP)的释放量。研究了紫外光照射、pH、温度和天然有机质对化学物质释放的调节作用。温度、pH和紫外光是影响pnc中TBP和BPA释放的最显著因素。此外,在聚碳酸酯和环氧复合材料中增加碳纳米管负载可以减少这些酚类化学物质的释放。当swcnts负载增加0.3%时,BPA的释放量减少45.18%,当swcnts负载增加1%时,BPA和TBP的化学释放量分别减少48.26%和58.8%。这些信息提供了重要的数据,可用于帮助评估水环境中swcnts聚合物纳米复合材料带来的风险,特别是当它们老化和转化时。
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引用次数: 4
Progress on the interaction between microplastics and contaminants 微塑料与污染物相互作用研究进展
IF 4.3 4区 环境科学与生态学 Q2 Chemistry Pub Date : 2021-01-01 DOI: 10.7524/J.ISSN.0254-6108.2020071502
Chu Xianxian, Zheng Bo, He Nan, Jia Shi-chao, Li Yunhui, Tian Yi-Mei
Microplastics (MPs) are widely present in the environment, with large specific surface area and strong adsorption, which can adsorb contaminants such as heavy metals, organic matters, and microorganisms, and change their fate in the environment. At the same time, the contaminants also affect the properties of MPs and their adsorption, transport, and degradation in the environment, which causes potential risks to the ecological environment. Research on the interaction between MPs and contaminants is the basis for the environmental risk assessment of MPs. At present, relevant researches are mostly focused on the distribution of MPs and their adsorption to contaminants. However, there are relatively few studies on the effects of contaminants on the properties of MPs and the changes in the properties of them after adsorption. Therefore, the article summarizes the distribution of MPs in the environment; and taking adsorption as an example to sort out the factors and mechanisms that affect the interaction. The current research status of the interaction between MPs and contaminants are reviewed, and finally we look forward to future research directions to provide reference and help for future researches on MPs.
微塑料(MPs)广泛存在于环境中,具有比表面积大、吸附性强的特点,可以吸附重金属、有机物、微生物等污染物,改变其在环境中的命运。同时,污染物还会影响MPs的性质及其在环境中的吸附、迁移和降解,对生态环境造成潜在的风险。研究多聚物与污染物的相互作用是多聚物环境风险评价的基础。目前,相关研究主要集中在MPs的分布及其对污染物的吸附上。然而,污染物对MPs性能的影响以及吸附后MPs性能变化的研究相对较少。因此,本文总结了MPs在环境中的分布;并以吸附为例,梳理了影响相互作用的因素和机理。综述了MPs与污染物相互作用的研究现状,最后展望了未来的研究方向,为今后MPs的研究提供参考和帮助。
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引用次数: 0
Evaluation and source analysis of heavy metal pollution in the soil around typical metal smelting and mining enterprises in Hunan Province 湖南省典型金属冶炼矿山企业周边土壤重金属污染评价及来源分析
IF 4.3 4区 环境科学与生态学 Q2 Chemistry Pub Date : 2021-01-01 DOI: 10.7524/J.ISSN.0254-6108.2021010901
D. Chen, Lucas Tan, Zimeng Nie, Zixue Wan, Qian Shu, Haijun Yang
In order to understand the current situation of heavy metal pollution in soil around typical metal smelting and mining industry in Hunan Province, 30 enterprises in the metal smelting and mining industry were selected as the research objects in this study, single factor pollution index, Nemeiro pollution index, potential ecological risk index and “Agricultural Land Soil Pollution Risk Control Standards” (GB15618-2018) were used to comprehensively evaluate the polution status of the soil cadmium (Cd), mercury (Hg), arsenic (As), lead (Pb), chromium (Cr), copper (Cu), nickel (Ni), zinc (Zn), and the main components method and the correlation method are also used to explore the sources of heavy metal pollution. The results showed that: The average values of Cd, Hg, As, Cu, Pb, Cr, Zn, and Ni in the samples in the contaminated area were 3.22, 0.985, 65.63, 67.43, 165.53, 94.07, 328, 43.9 mg·kg−1, it is 2.01, 3.66, 1.89, 1.98, 1.98, 1.14, 1.58, 1.39 times of the mean value of the corresponding heavy metal elements in the control point samples; The single factor pollution index (Pi) of heavy metals is Cd>As>Pb>Zn>Cu>Ni>Cr>Hg in dry land, Cd>Hg>Pb>As>Zn>Ni>Cu>Cr in paddy fields, Cd>Zn>As>Pb>Cu>Cr>Ni>Hg in wild grassland, and the order of the heavy metal Pi in woodland is the same as that of dry land. Results of Nemeiro Comprehensive Pollution Index show that the proportion of heavy metal pollution in paddy field, dry land, wasteland and woodland is 44.4%, 48.1%, 52.4%, and 31.6% respectively. The comprehensive evaluation results of the potential ecological risk index showed that the risk levels of dryland, paddy field, wasteland and forestland were 83.3%, 74%, 71.4% and 47.4% in intensity or above. The results of the risk control standard evaluation of agricultural land found that among the 93 soil samples in the contaminated areas, the proportion of samples in the priority protection category, safe use category and strict control category was 10.8%, 50.5% and 38.7% respectively. The results of source analysis showed that Cd, As, Pb, Zn, Cu in the contaminated soil may be influenced by agricultural activities, industrial activities and transportation, Cr may come from the control of the parent material of the soil, and Hg and Ni may be affected by industrial activities. The results show that the pollution control of heavy metals in the soil around the typical metal smelting and mining industry in Hunan Province should focus on strengthening the control and treatment of pollution sources of Cd, Hg, As, Pb and Zn.
为了解湖南省典型金属冶炼采矿业周边土壤重金属污染现状,本研究选取30家金属冶炼采矿业企业作为研究对象,采用单因素污染指数、Nemeiro污染指数、采用潜在生态风险指数和《农用地土壤污染风险控制标准》(GB15618-2018)对土壤镉(Cd)、汞(Hg)、砷(As)、铅(Pb)、铬(Cr)、铜(Cu)、镍(Ni)、锌(Zn)的污染状况进行综合评价,并采用主成分法和相关法对重金属污染源进行探索。结果表明:污染区样品中Cd、Hg、As、Cu、Pb、Cr、Zn、Ni的平均值分别为3.22、0.985、65.63、67.43、165.53、94.07、328、43.9 mg·kg−1,是控制点样品中相应重金属元素平均值的2.01、3.66、1.89、1.98、1.98、1.14、1.58、1.39倍;旱地重金属单因素污染指数(Pi)为Cd>As>Pb>Zn>Cu>Ni>Cr>Hg,水田为Cd>Hg>Pb>As>Zn>Ni>Cu>Cr,野生草地为Cd>Zn>As>Pb>Cu>Cr>Ni>Hg,林地重金属Pi的顺序与旱地相同。Nemeiro综合污染指数结果显示,水田、旱地、荒地和林地重金属污染比例分别为44.4%、48.1%、52.4%和31.6%。潜在生态风险指数综合评价结果显示,旱地、水田、荒地和林地的风险等级分别为83.3%、74%、71.4%和47.4%。农用地风险控制标准评价结果发现,污染区93个土壤样品中,优先保护类、安全使用类和严格控制类样品所占比例分别为10.8%、50.5%和38.7%。来源分析结果表明,污染土壤中的Cd、As、Pb、Zn、Cu可能受到农业活动、工业活动和交通运输的影响,Cr可能来自土壤母质的控制,Hg、Ni可能受到工业活动的影响。结果表明:湖南省典型金属冶炼采矿业周边土壤重金属污染控制应重点加强Cd、Hg、As、Pb、Zn污染源的控制与治理。
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引用次数: 3
Foreword to the research front on ‘Fluxes and Chemistry of Marine Biogenic Volatile Organic Compounds’ “海洋生物源性挥发性有机物的通量与化学”研究前沿综述
IF 4.3 4区 环境科学与生态学 Q2 Chemistry Pub Date : 2021-01-01 DOI: 10.1071/env18n6_fo
Honghai Zhang, Ying Chen
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引用次数: 0
Enhanced biodegradation of 17α-ethinylestradiol by rhamnolipids in sediment/water systems 鼠李糖脂对沉积物/水体中17α-炔雌醇的生物降解作用增强
IF 4.3 4区 环境科学与生态学 Q2 Chemistry Pub Date : 2021-01-01 DOI: 10.1071/en20175
Yan-ping Guo, Zhijie Guan, Hui Lin, Xuelian Ou
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引用次数: 2
Fluxes of dissolved methane and nitrous oxide in the tidal cycle in a mangrove in South China 华南红树林潮汐循环中溶解甲烷和氧化亚氮的通量
IF 4.3 4区 环境科学与生态学 Q2 Chemistry Pub Date : 2021-01-01 DOI: 10.1071/en21090
Jian Liu, Liyang Zhan, Wangwang Ye, Jianwen Wen, Guang-liang Chen, Yuhong Li, Liqi Chen
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引用次数: 0
期刊
Environmental Chemistry
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