Chemosphere最新文献_第9页

Role of molybdenum compounds in enhancing denitrification: Structure-activity relationship and the regulatory mechanisms 钼化合物在提高反硝化作用中的作用：结构-活性关系和调节机制。

IF 8.1 2区环境科学与生态学 Q1 ENVIRONMENTAL SCIENCES

Chemosphere

Pub Date : 2024-11-01 DOI: 10.1016/j.chemosphere.2024.143433

Ying Zhang , Hejiao Sun , Caicai Lu , Haibo Li , Jianbo Guo

The effect and regulatory mechanisms of molybdenum compounds (MoO₂, MoS₂, MoSe₂ and MoSi₂) on denitrification were investigated by structure-activity relationships, electrochemical characteristics, microbial metabolism analysis and bacterial community distribution. All the assessed molybdenum compounds exhibited the enhancement effect on denitrification, in the order of MoS₂ > MoSi₂ > MoSe₂ > MoO₂, with MoS₂ increasing 7.08-fold in 12 h. Analysis of structure-activity relationships suggested that the molybdenum compounds with lower negative redox potential and higher redox reversibility were favorable for promoting denitrification. According to the morphology observation, the interactions between Mo compounds and denitrifying bacteria may be beneficial to extracellular electron transfer. Molybdenum compounds with electron transfer capability facilitated an increase in electron capacitance from 835.1 to 1011.3 μF, promoting the electron exchange rate during denitrification. In the denitrification electron transport chain, the molybdenum compounds upregulated nicotinamide adenine dinucleotide and denitrifying enzyme activity, as well as facilitated the abundance of quinone pools, ATP translocation, and cytochrome c related proteins. Moreover, Mo compounds enriched functional bacteria such as electroactive bacteria and denitrifying functional bacteria. Notably, Mo ions in molybdenum compounds may provide active sites for nitrate reductase, optimizing the electron distribution of the denitrification process and thus improved the partial denitrification efficiency. This work aimed to further understand the regulatory mechanisms of molybdenum on denitrification electron transfer in the compound state and to anticipate the catalytic role of Mo compounds for sustainable water treatment.

通过结构-活性关系、电化学特征、微生物代谢分析和细菌群落分布，研究了钼化合物（MoO2、MoS2、MoSe2和MoSi2）对反硝化的影响和调控机制。结构-活性关系分析表明，负氧化还原电位较低、氧化还原可逆性较高的钼化合物有利于促进反硝化。根据形态观察，钼化合物与反硝化细菌之间的相互作用可能有利于细胞外电子传递。具有电子传递能力的钼化合物可促进电子电容从 835.1 μF 增加到 1011.3 μF，从而提高反硝化过程中的电子交换速率。在反硝化电子传递链中，钼化合物提高了烟酰胺腺嘌呤二核苷酸和反硝化酶的活性，并促进了醌池、ATP转运和细胞色素c相关蛋白的丰度。此外，钼化合物还富集了功能细菌，如电活性细菌和反硝化功能细菌。值得注意的是，钼化合物中的钼离子可为硝酸还原酶提供活性位点，优化反硝化过程中的电子分布，从而提高部分反硝化效率。这项工作旨在进一步了解钼在化合物状态下对反硝化电子传递的调控机制，并预测钼化合物在可持续水处理中的催化作用。

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引用次数: 0

Human exposure to heavy metals and possible public health risks via consumption of mussels M. galloprovincialis from the Albanian sea cost 人类通过食用阿尔巴尼亚海域的贻贝 M. galloprovincialis 接触重金属并可能对公共健康造成危害。

IF 8.1 2区环境科学与生态学 Q1 ENVIRONMENTAL SCIENCES

Chemosphere

Pub Date : 2024-11-01 DOI: 10.1016/j.chemosphere.2024.143689

Enkeleda Ozuni , Egon Andoni , Marta Castrica , Claudia M. Balzaretti , Gabriele Brecchia , Stella Agradi , Giulio Curone , Federica Di Cesare , Nour Elhouda Fehri , Blerina Luke , Mehmet Erman Or , Esra Akkaya , Oğuzhan Yavuz , Laura Menchetti , Lek Prendi , Nural Pastacı Özsonacı , Alev Meltem Ercan , Fatma Ateş , Dino Miraglia

Heavy metals in the marine environment are significant contaminants that readily bioaccumulate in the tissues of aquatic organisms, particularly in filter-feeding animals such as bivalve molluscs. Human exposure to elevated concentrations of heavy metals, including essential elements such as Fe, Cu, and Zn, through the consumption of seafood can lead to various pathological effects. Research has demonstrated that among bivalve molluscs, mussels are the most effective indicators for monitoring marine pollution. Consequently, this study focused on the species Mytilus galloprovincialis to evaluate the levels of Al, As, Cd, Cr, Cu, Fe, Mg, Ni, Pb, and Zn in the two primary harvesting areas of Albania and to assess the associated human health risks from mussel consumption. The results revealed a concerning situation, particularly for Pb and Cd, with average concentrations of 2.15 μg/g and 4.14 μg/g, respectively, significantly exceeding the limits established by Regulation (EC) No. 915/2023. The levels of the other investigated elements also raised concerns, as only half of them were within the dietary intake values recommended by scientific authorities for weekly consumption of 250 g of mussels.

海洋环境中的重金属是一种重要的污染物，很容易在水生生物的组织中进行生物累积，尤其是在双壳软体动物等滤食性动物体内。人类通过食用海产品接触高浓度的重金属，包括铁、铜和锌等必需元素，会导致各种病理效应。研究表明，在双壳类软体动物中，贻贝是监测海洋污染最有效的指标。因此，本研究以贻贝为重点，评估阿尔巴尼亚两个主要捕捞区的铝、砷、镉、铬、铜、铁、镁、镍、铅和锌含量，并评估食用贻贝对人类健康造成的相关风险。结果显示，情况令人担忧，尤其是铅和镉，平均浓度分别为 2.15 μg/g 和 4.14 μg/g，大大超出了第 915/2023 号法规（EC）规定的限值。其他调查元素的含量也引起了人们的关注，因为其中只有一半在科学权威机构建议的每周食用 250 克贻贝的膳食摄入值范围内。

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引用次数: 0

Further exploitation of metabolic potential for catechol biodegradation of Klebsiella sp. CD33 进一步挖掘克雷伯氏菌 CD33 的儿茶酚生物降解代谢潜力。

IF 8.1 2区环境科学与生态学 Q1 ENVIRONMENTAL SCIENCES

Chemosphere

Pub Date : 2024-11-01 DOI: 10.1016/j.chemosphere.2024.143737

Xinger Xie , Qibai Tian , Jiahui Liu , Xuan Zhang , Xinyu Ye , Xian Zhang

Microbial-mediated degradation of phenolic pollutants (e.g., catechol) has been a critical concern for sewage treatment, while exploiting the strain resources and fully characterizing the metabolic potential of functional microbes for toxic refractory catechol are the key and study-worthy issues. In this study, up to 32 strains originally isolated from phenol-contaminated environments were phylogenetically affiliated with the genus Klebsiella and identified to have the ability of catechol degradation, with strain CD33 as the excellent one. Single-factor experiments determined that strain CD33 exhibited a highly efficient catechol degradation under the conditions of temperature 35 °C, initial pH value of 7.0, and inoculum volume of 30.0% (v/v). To preliminarily validate the possible pathway of catechol biodegradation, concentration variation of the initial enzyme (i.e., catechol 1,2 dioxygenase) and the corresponding metabolic intermediate (i.e., cis,cis-muconic acid) were detected, suggesting that strain CD33 can degrade the catechol uniquely via the ortho-cleavage pathway. Furthermore, a combination of genome-wide identification, homologous modeling, and gene expression analysis was employed to elucidate the complete pathway of catechol degradation, especially in which a novel branch mediated by CMBL gene was responsible for the direct conversion of (+)-muconolactone into 3-oxoadipic acid. Collectively, this study extends our understanding of catechol degradation of Klebsiella spp., which may provide an alternative promising avenue for the practical application of pollutant remediation.

微生物介导的酚类污染物（如邻苯二酚）降解一直是污水处理的关键问题，而开发菌种资源、充分表征功能微生物对有毒难降解邻苯二酚的代谢潜力是关键和值得研究的问题。本研究对最初从苯酚污染环境中分离出的多达 32 株菌株进行了系统发育，将其归属于克雷伯氏菌属，并鉴定出其具有降解邻苯二酚的能力，其中 CD33 菌株是最优秀的菌株。单因素实验表明，在温度为 35 ℃、初始 pH 值为 7.0、接种量为 30.0% (v/v) 的条件下，CD33 菌株能高效降解邻苯二酚。为了初步验证儿茶酚生物降解的可能途径，检测到了初始酶（即儿茶酚 1,2 二氧合酶）和相应代谢中间产物（即顺式、顺式粘多酸）的浓度变化，这表明菌株 CD33 可以通过正交裂解途径降解儿茶酚。此外，本研究还采用了全基因组鉴定、同源建模和基因表达分析相结合的方法，阐明了儿茶酚降解的完整途径，特别是其中由 CMBL 基因介导的新分支负责将（+）-木瓜内酯直接转化为 3-oxoadipic 酸。总之，这项研究扩展了我们对克雷伯氏菌属降解邻苯二酚的认识，为污染物修复的实际应用提供了另一种有前景的途径。

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引用次数: 0

Insecticides used for controlling cotton mealybug pose a threat to non-target bumble bees 用于控制棉粉蚧的杀虫剂对非目标熊蜂构成威胁。

IF 8.1 2区环境科学与生态学 Q1 ENVIRONMENTAL SCIENCES

Chemosphere

Pub Date : 2024-11-01 DOI: 10.1016/j.chemosphere.2024.143742

Roberto Catania , Marta Bonforte , Lívia Maria Negrini Ferreira , Gustavo Ferreira Martins , Maria Augusta Pereira Lima , Michele Ricupero , Lucia Zappalà , Gaetana Mazzeo

Bumble bees (Bombus spp., Hymenoptera, Apidae) play a crucial role in pollinating greenhouse tomato crops. However, tomato production is constantly threatened by different invasive pests that often lead to the increased use of pesticides, with negative consequences for pollinators. The cotton mealybug Phenacoccus solenopsis has recently been reported in Mediterranean tomatoes and its chemical control raises concerns also regarding bumble bees. In the laboratory, we evaluated the acute toxicity and sublethal effects in B. terrestris workers exposed to the diet contaminated with four insecticides (acetamiprid, pyriproxyfen, sulfoxaflor, and thiamethoxam), potentially used to control P. solenopsis. Sulfoxaflor and thiamethoxam significantly reduced the survival of B. terrestris, while acetamiprid and pyriproxyfen altered its feeding behaviour, and the bumble bees were unable to detect the contaminated solution. Moreover, neurotoxic symptoms were observed in bees exposed to acetamiprid and alterations of the midgut were detected in bees exposed to both acetamiprid and pyriproxyfen. These results show that insecticides with low levels of toxicity to bumble bees (e.g. acetamiprid and pyriproxyfen), can cause sublethal effects on them, increasing concern about the use of these substances. Our findings provide valuable insights as regards optimizing bumble bee pollination services with chemical pest control within the context of Integrated Pest and Pollinator Management.

熊蜂（Bombus spp.，膜翅目，鳞翅目）在为温室番茄作物授粉方面发挥着至关重要的作用。然而，番茄生产不断受到各种入侵害虫的威胁，这些害虫往往导致杀虫剂使用量的增加，对传粉昆虫造成负面影响。最近，地中海番茄中出现了棉粉蚧 Phenacoccus solenopsis，对其进行化学防治也引起了人们对熊蜂的关注。在实验室中，我们评估了可能用于控制棉粉蚧的四种杀虫剂（啶虫脒、吡虫啉、磺草酮和噻虫嗪）对熊蜂的急性毒性和亚致死效应。磺胺草酮和噻虫嗪大大降低了熊蜂的存活率，而啶虫脒和吡虫啉则改变了熊蜂的取食行为，熊蜂无法检测到受污染的溶液。此外，暴露于啶虫脒的大黄蜂出现了神经中毒症状，暴露于啶虫脒和吡虫啉的大黄蜂中肠也发生了变化。这些结果表明，对熊蜂毒性较低的杀虫剂（如啶虫脒和吡虫啉）可对熊蜂造成亚致死效应，从而增加了对使用这些物质的担忧。我们的研究结果为在害虫和传粉昆虫综合管理的背景下通过化学害虫控制优化熊蜂授粉服务提供了宝贵的见解。

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引用次数: 0

Metabolomic and microbiomic resilience of Hong Kong oysters to dual stressors: Zinc oxide nanoparticles and low salinity 香港牡蛎在双重压力下的代谢组学和微生物组学复原力：纳米氧化锌和低盐度。

IF 8.1 2区环境科学与生态学 Q1 ENVIRONMENTAL SCIENCES

Chemosphere

Pub Date : 2024-11-01 DOI: 10.1016/j.chemosphere.2024.143722

Jie Lu , Tuo Yao , Shengli Fu , Lingtong Ye

Zinc oxide nanoparticles, increasingly used in industrial and consumer products, and low salinity, exacerbated by climate change-induced alterations in precipitation patterns, represent significant environmental pressures in estuarine and coastal environments. This study advances previous research on their impacts on Hong Kong oysters (Crassostrea hongkongensis) by integrating metabolomics of hepatopancreas and gills with intestinal microbiomics. Employing advanced multi-omics integration methods, our analysis reveals novel insights into metabolic resilience under combined stress conditions. This resilience is characterized by coordinated, organ-specific adjustments in energy metabolism (d-glucose 1-phosphate in hepatopancreas, cytidine in gills), antioxidant defenses (glutathione, meso-2,6-diaminoheptanedioate, pimelic acid in hepatopancreas; indole, 3-(3-hydroxyphenyl)propanoic acid in gills), immune function (l-glutamine, ergocalciferol in hepatopancreas; argininosuccinic acid in gills), and membrane stability (lanosterin in hepatopancreas, allantoin in gills). Notably, under dual stressors, we observed a previously undescribed stabilization of microbial alpha diversity and certain phyla, an absence of distinctive biomarkers, and certain metabolic activity stabilization within the intestinal microbiota. These findings suggest robust compensatory mechanisms that maintain physiological homeostasis and microbial balance under stress, contrasting with primarily negative impacts reported in previous studies. Integration of metabolomic and microbiomic data revealed coordinated responses between microbial community changes and metabolic adjustments, particularly in osmoregulation, energy metabolism and antioxidant defenses, under dual stressors. This comprehensive approach provides a more realistic model of environmental challenges, revealing sophisticated adaptive strategies in Hong Kong oysters. Our study offers critical insights for understanding bivalve resilience, informing conservation strategies, and managing marine ecosystems in the face of increasing anthropogenic pressures.

纳米氧化锌越来越多地用于工业和消费品中，而气候变化引起的降水模式改变又加剧了低盐度，这些都对河口和沿海环境造成了巨大的环境压力。本研究通过整合肝胰脏和鳃的代谢组学以及肠道微生物组学，推进了之前关于它们对香港牡蛎（Crassostrea hongkongensis）影响的研究。利用先进的多组学整合方法，我们的分析揭示了在综合压力条件下代谢恢复能力的新见解。这种恢复力的特点是在能量代谢（肝胰脏中的 D-葡萄糖-1-磷酸、鳃中的胞苷）、抗氧化防御（肝胰脏中的谷胱甘肽、介-2,6-二氨基庚二酸、庚二酸；吲哚、鳃中的 3-（3-羟基苯基）丙酸）、免疫功能（肝胰腺中的 L-谷氨酰胺、麦角钙化醇；鳃中的精氨酸琥珀酸）和膜稳定性（肝胰腺中的羊毛甾素、鳃中的尿囊素）。值得注意的是，在双重胁迫下，我们观察到微生物阿尔法多样性和某些门类出现了之前未曾描述过的稳定，肠道微生物群中没有独特的生物标志物，某些代谢活动也趋于稳定。这些发现表明，在压力下，维持生理平衡和微生物平衡的补偿机制非常强大，这与之前研究中报道的主要负面影响形成了鲜明对比。代谢组学和微生物组学数据的整合揭示了双重压力下微生物群落变化和代谢调整之间的协调反应，特别是在渗透调节、能量代谢和抗氧化防御方面。这种综合方法提供了一个更真实的环境挑战模型，揭示了香港牡蛎复杂的适应策略。我们的研究为了解双壳贝类的恢复能力、制定保护策略以及在人类活动压力不断增加的情况下管理海洋生态系统提供了重要的启示。

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引用次数: 0

Evaluating AGS efficiency in PHA synthesis and extraction integrated with nutrient removal: The impact of COD concentrations 评估 AGS 在 PHA 合成和提取以及去除营养物质方面的效率：COD 浓度的影响。

IF 8.1 2区环境科学与生态学 Q1 ENVIRONMENTAL SCIENCES

Chemosphere

Pub Date : 2024-11-01 DOI: 10.1016/j.chemosphere.2024.143708

Quan Yuan , Song Chen , Yun Chen , Xinyu Zhang , Yuqing Lou , Xueting Li , Qian Liang , Yanping Zhang , Yingxue Sun

As natural and biodegradable biopolymers, Polyhydroxyalkanoates (PHA) were synthetized by aerobic granules sludge (AGS) in a sequential batch reactor in this study. The effect of different COD concentrations on PHA accumulation and nutrients removal were investigated. At the same time, different pretreatment methods for PHA extraction, including NaClO pretreatment for extracellular polymeric substances (EPS) removal, Na₂CO₃ pretreatment for EPS recovery, and grinding pretreatment to reduce particle size and augment the surface area available for interaction with the extraction solvent, were compared. The results showed that the PHA yield increased more than 2 times (from 91.1 to 233.3 mgPHA/gCDW (cell dry weight)) when COD concentration increased from 800 to 1600 mg/L. Polyhydroxybutyrate (PHB) and polyhydroxyvalerate (PHV) both accounted for half of the total, while PHB fraction rose to 71% when COD concentration went up to 1600 mg/L. The PHB can be consumed 3 times faster than PHV. High COD concentration (1600 mg/L) adversely impacted the structure stability of AGS and the phosphorus removal efficiency, while the system consistently exhibited robust nitrogen removal capabilities, with ammonium and TN removal efficiencies exceeding >90%. The dominant bacteria shifted from Flavobacterium to Halomona and Hydrogenophaga as the COD concentration increased. In terms of PHA extraction, Na₂CO₃ pretreatment, which was used for EPS recovery, had the best PHA recovery with nearly 100% purity and EPS removal efficiency compared with NaClO and grinding pretreatments.

本研究利用好氧颗粒污泥（AGS）在序批式反应器中合成了可生物降解的天然生物聚合物聚羟基烷酸酯（PHA）。研究了不同 COD 浓度对 PHA 积累和营养物质去除的影响。同时，比较了不同的 PHA 提取预处理方法，包括去除胞外聚合物物质（EPS）的 NaClO 预处理、回收 EPS 的 Na2CO3 预处理，以及减小颗粒尺寸以增加与提取溶剂相互作用表面积的研磨预处理。结果表明，当 COD 浓度从 800 mg/L 增加到 1600 mg/L 时，PHA 产量增加了 2 倍多（从 91.1 mgPHA/gCDW （细胞干重）增加到 233.3 mgPHA/gCDW）。聚羟基丁酸盐（PHB）和聚羟基戊酸盐（PHV）均占总量的一半，而当 COD 浓度升至 1600 mg/L 时，PHB 的比例升至 71%。PHB 的消耗速度是 PHV 的 3 倍。高浓度 COD（1600 毫克/升）对 AGS 的结构稳定性和除磷效率产生了不利影响，但该系统始终表现出强大的脱氮能力，铵和 TN 的去除率超过 90%。随着 COD 浓度的增加，优势菌从黄杆菌转变为 Halomona 和 Hydrogenophaga。在 PHA 提取方面，与 NaClO 和研磨预处理相比，用于 EPS 回收的 Na2CO3 预处理的 PHA 回收率最高，纯度和 EPS 去除效率接近 100%。

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引用次数: 0

Spatio-temporal analysis of water chemistry and ecotoxicological risk characterisation for a constructed pilot-scale pit lake in the Athabasca oil sands region, Canada 对加拿大阿萨巴斯卡油砂地区的一个试点规模矿坑湖进行水化学和生态毒理学风险特征的时空分析。

IF 8.1 2区环境科学与生态学 Q1 ENVIRONMENTAL SCIENCES

Chemosphere

Pub Date : 2024-11-01 DOI: 10.1016/j.chemosphere.2024.143679

Banamali Panigrahi , Lorne E. Doig , Catherine Estefany Davila-Arenas , Immanuela Ezugba , Karsten Liber

Substantial quantities of fine tailings and oil sands process affected water (OSPW) require reclamation in the Athabasca oil sands (AOS) region, Canada. Towards this end, Lake Miwasin was created as a pilot-scale pit lake containing treated fluid tailings (bottom sediment) capped with a blend of OSPW and surface water. This is a recent approach to waste reclamation and long-term monitoring is ongoing to determine the trajectory of water quality in this test lake. The current study characterized spatial and temporal changes in surface water chemistry using a wireless sensor network (WSN), particularly to identify contaminant release from the consolidating tailings and potential periods of sediment resuspension. The WSN technology was deployed during the open water season from September 2020 to October 2022 to remotely measure water quality parameters at different depths of the water column. Field measurements and manual water sampling were conducted periodically to validate sensor measurements and to analyse additional variables requiring more complex analysis. During the study, increased electrical conductivity (EC) near the sediment-water interface during water column stratification indicated expression of pore water with elevated salt content, as the bottom tailings progressively consolidated. A decreasing trend in EC towards the end of the monitoring season suggested water input from the surrounding catchment and possibly a decline in porewater expression. A Tier 1 screening-level risk assessment using hazard quotients (HQs) was conducted for individual metals using Canadian water quality benchmarks and published toxicity data. Total osmolarity was used to identify risks associated with major ions. Cumulative HQs for trace elements were >1 but decreased over time. The risk due to major ions was <1 for all years and seasons except 2019 and winter 2020. Modelling results indicated that the predicted 90^th percentile HQs for Se and As were 1.6 and 0.44, respectively, suggesting that Se represents a potential ecotoxicological risk and should be further investigated. Overall, water quality monitoring and modelling insights gained from this study have the potential to inform AOS pit lake design and prediction of reclamation trajectories.

加拿大阿萨巴斯卡油砂（AOS）地区需要对大量的细尾矿和受油砂加工影响的水（OSPW）进行填埋。为此，米瓦辛湖（Lake Miwasin）作为一个试点规模的矿坑湖被建造出来，湖中有经过处理的流体尾矿（底部沉积物）和混合的 OSPW 和地表水。这是一种最新的废物再生方法，目前正在进行长期监测，以确定该试验湖的水质轨迹。当前的研究利用无线传感器网络 (WSN) 对地表水化学的空间和时间变化进行了描述，尤其是为了确定污染物从固结尾矿中的释放情况以及沉积物重新悬浮的潜在时期。在 2020 年 9 月至 2022 年 10 月的开放水域季节部署了 WSN 技术，以远程测量水体不同深度的水质参数。定期进行实地测量和人工水样采集，以验证传感器测量结果，并分析需要进行更复杂分析的其他变量。研究期间，水柱分层期间沉积物-水界面附近的电导率（EC）增加，表明随着底部尾矿逐渐固结，孔隙水的含盐量升高。在监测季节结束时，导电率呈下降趋势，这表明周围集水区有水输入，孔隙水的表现可能有所下降。利用加拿大水质基准和已公布的毒性数据，采用危害商数 (HQ) 对单个金属进行了一级筛选级风险评估。总渗透压用于确定与主要离子相关的风险。微量元素的累积危险商数大于 1，但随着时间的推移而降低。主要离子造成的风险是，硒和砷的第 3 个百分位数 HQ 分别为 1.6 和 0.44，这表明硒具有潜在的生态毒理学风险，应进一步加以研究。总之，本研究中获得的水质监测和建模见解有可能为填海工程坑湖设计和填海轨迹预测提供参考。

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引用次数: 0

Quantification and ecotoxicological contribution of volatile compounds in produced water effluents 采出水废水中挥发性化合物的定量和生态毒理学贡献。

IF 8.1 2区环境科学与生态学 Q1 ENVIRONMENTAL SCIENCES

Chemosphere

Pub Date : 2024-11-01 DOI: 10.1016/j.chemosphere.2024.143659

Matteo Ottaviani , Neri Bonciani , Markus Varlund Strange , Emil Hoffmann Bohr , Lars Michael Skjolding , Karen Louise Feilberg

Produced water (PW) is a significant byproduct of offshore oil and gas production, constituting a major waste stream in the North Sea. Existing regulations address only the dispersed aliphatic hydrocarbon content in PW, and limited attention is given to other potentially hazardous compounds, including benzene, toluene, ethyl benzene and xylene (BTEX), polycyclic aromatic hydrocarbons (PAHs), phenols, water-soluble petroleum constituents as well as production-related chemicals. In this study, Danish oil production PW samples were subjected to purge and trap extraction on granular activated carbon for volatile compounds identification and quantification by GC-MS analysis. The obtained analytical data correlate with toxicity assessments conducted on three trophic levels, bacteria (Aliivibrio fischeri), algae (Skeletonema costatum) and copepods (Acartia tonsa) on the whole effluent as well as on treated samples. The removal of the PW volatile fraction by purging experiments resulted in a decrease in toxicity response from 37% ± 23–65% ± 16 across the tested species. The chemicals identified in this study and their toxicity response enhance the comprehension of the PW effluent composition and inform the development of strategies for offshore reservoir wastewater.

采出水 (PW) 是近海石油和天然气生产的重要副产品，是北海的主要废物流。现有法规只针对生产水中的分散脂肪烃含量，对其他潜在危险化合物的关注有限，包括苯、甲苯、乙苯和二甲苯 (BTEX)、多环芳烃 (PAH)、酚类、水溶性石油成分以及与生产相关的化学品。在这项研究中，丹麦石油生产压降样品在颗粒状活性炭上进行了净化和捕集萃取，并通过气相色谱-质谱分析对挥发性化合物进行了鉴定和定量。所获得的分析数据与对整个污水和处理过的样本中的细菌（Aliivibrio fischeri）、藻类（Skeletonema costatum）和桡足类（Acartia tonsa）这三个营养级进行的毒性评估相关。通过净化实验去除 PW 挥发性部分后，受试物种的毒性反应从 37%±23 降至 65%±16。本研究确定的化学物质及其毒性反应提高了对压水污水成分的理解，并为制定近海水库废水处理策略提供了参考。

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引用次数: 0

Unlocking the potential of environmentally friendly adsorbent derived from industrial wastes: A review 发掘从工业废物中提取的环境友好型吸附剂的潜力：综述。

IF 8.1 2区环境科学与生态学 Q1 ENVIRONMENTAL SCIENCES

Chemosphere

Pub Date : 2024-11-01 DOI: 10.1016/j.chemosphere.2024.143662

Huy Hoang Phan Quang , Nga Thi Dinh , Quoc-Minh Truong , Phan Khanh Thinh Nguyen , Van-Huy Nguyen

With increasing urbanization and industrialization, growing amounts of industrial waste, such as red mud (RM), fly ash (FA), blast furnace slag (BFS), steel slag (SS), and sludge, are being produced, exposing substantial threats to the environment and human health. Given that numerous researchers associate with conventional adsorbents, developing and utilizing industrial wastes derived from adsorption technology still has received limited attention. Utilizing this waste contributes to developing alternative materials with superior performance and significantly reduces the volume of solid waste. The excellent physical and chemical characteristics of these wastes are also investigated in this paper. This review attempts to demonstrate a comprehensive overview of the application of industrial waste-based adsorbent in the adsorption process for removing organic pollutants, dyes, metallic ions, non-metallic ions, and radioactive substances. In addition, industrial waste-based adsorbents are among the most promising and applicable techniques for pollutant removal, offering remarkable adsorption efficiency, rich surface chemistries, reasonable cost, simple operation, and low energy consumption. This review summarizes state-of-the-art advancements in engineered adsorbents (including physical and chemical modifications). It provides a holistic view regarding a comprehensive understanding of the mechanism involved in adsorption for water remediation. The challenges and the prospects for future research in applying these adsorbents are also elucidated, contributing to sustainable waste management and environmental sustainability.

随着城市化和工业化进程的加快，赤泥（RM）、粉煤灰（FA）、高炉渣（BFS）、钢渣（SS）和污泥等工业废弃物的产生量越来越大，对环境和人类健康造成了巨大威胁。鉴于许多研究人员都在研究传统吸附剂，开发和利用吸附技术产生的工业废料受到的关注仍然有限。利用这些废料有助于开发性能优越的替代材料，并大大减少固体废物的数量。本文还对这些废物的优异物理和化学特性进行了研究。本综述试图全面概述基于工业废物的吸附剂在吸附过程中去除有机污染物、染料、金属离子、非金属离子和放射性物质的应用。此外，基于工业废料的吸附剂具有吸附效率高、表面化学成分丰富、成本合理、操作简单和能耗低等优点，是最有前途和最适用的污染物去除技术之一。本综述总结了工程吸附剂（包括物理和化学改性）的最新进展。它提供了一个全面的视角，帮助读者全面了解吸附剂在水处理方面的作用机理。此外，还阐明了应用这些吸附剂所面临的挑战和未来研究的前景，从而为可持续废物管理和环境可持续性做出贡献。

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引用次数: 0

Sequential extraction of anthropogenic microfibers from the leaves of Pittosporum tobira 按顺序提取海桐叶中的人为微纤维

IF 8.1 2区环境科学与生态学 Q1 ENVIRONMENTAL SCIENCES

Chemosphere

Pub Date : 2024-11-01 DOI: 10.1016/j.chemosphere.2024.143628

Fiore Capozzi , Angelo Granata , Anna Gaglione , Tina Gargiulo , Antonio Rallo , Francesca Marino , Maria Cristina Sorrentino , Concetta Pironti , Alessandro Vergara , Valeria Spagnuolo , Simonetta Giordano

The emission of microfibers (MFs) into all environmental matrices, including biota, is a global concern, but appropriate methodologies aimed at biomonitoring these pollutants are still in an exploratory stage. In this work a new method is presented for the extraction of airborne anthropogenic microfibers (MFs) from the leaves of Pittosporum tobira. The method is a sequential extraction consisting of tape tearing followed by water floating, ethanol extraction, and wet peroxidation, which considered at first outermost MFs, weakly adhering to leaf surface, and deeper MFs partly embedded in waxy cuticle layer. Tape tearing removed the highest fraction of MFs (about 75%), followed by water washing, ethanol and peroxidation. The constant ratio between the MFs collected in the successive extraction steps indicated that the protocol proposed is reliable and reproducible. Moreover, based on the tape tearing step, MFs number was significantly higher on the upper surface of the leaves, whereas MFs were significantly longer on the lower surface. A “reverse” extraction protocol in which tape tearing followed three water-washings demonstrated that a noticeable fraction of MFs still adhered to the leaf after water floating. SEM observation of the leaf surface highlighted the structural changes occurring during the extraction, with leaf surface becoming clearer and smoother at each step. Raman spectroscopy highlighted the presence of different kind of anthropogenic MFs, with microplastics representing 50%, and polyethylene terephthalate 39% of total MFs. Due to reproducible results and easy handling of the leaves, we encourage the use of P. tobira as a biomonitor of airborne MFs and suggest that a simplified extraction method based on tape tearing alone could be a fast and useful alternative to be adopted in biomonitoring protocols.

微纤维（MFs）排放到包括生物群在内的所有环境基质中是一个全球关注的问题，但旨在对这些污染物进行生物监测的适当方法仍处于探索阶段。本研究提出了一种新的方法，用于从 Pittosporum tobira 的叶子中提取空气中的人为微纤维 (MFs)。该方法是一种顺序萃取法，包括撕带、水漂浮、乙醇萃取和湿过氧化，首先考虑的是最外层的微纤维，它们微弱地附着在叶片表面，然后是部分嵌入蜡质角质层的深层微纤维。胶带撕裂法去除的 MFs 最多（约 75%），其次是水洗法、乙醇法和过氧化法。在连续的提取步骤中收集到的 MFs 比例恒定，这表明所提出的方案是可靠和可重复的。此外，根据撕带步骤，叶片上表面的 MFs 数量明显较多，而下表面的 MFs 则明显较长。一种 "反向 "提取方案（即撕带后再进行三次水洗）表明，水浮后仍有相当一部分 MFs 附着在叶片上。对叶片表面的扫描电子显微镜观察突出显示了萃取过程中发生的结构变化，每一步叶片表面都变得更加清晰和光滑。拉曼光谱显示了不同种类的人为 MFs，其中微塑料占 MFs 总量的 50%，聚对苯二甲酸乙二醇酯占 39%。由于结果具有可重复性，而且叶片易于处理，我们鼓励使用托比拉叶片作为空气传播的中频物质的生物监测器，并建议在生物监测方案中采用基于胶带撕裂的简化提取方法。

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引用次数: 0