Chemosphere最新文献_第4页

Hydrothermal synthesis and characterization of samarium molybdate nanosheets modified multi-walled carbon nanotubes: Real-time analysis of dimetridazole in environmental and biological samples 钼酸钐纳米片修饰多壁碳纳米管的水热合成与表征：实时分析环境和生物样品中的二甲哒唑。

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.2024.143616

Dimetridazole (DMZ) is commonly used as a veterinary drug, resulting in high emissions and environmental pollution and DMZ residues are carcinogenic, genotoxic, and mutagenic to humans. Therefore, it is essential to construct a fast, sensitive and simple sensor to monitor DMZ. In this study, samarium molybdate nanosheets modified multi-walled carbon nanotube composites (SmM/MWCNT) were synthesized to modify GCE for detecting DMZ. The SmM/MWCNT material was also characterized by various analytical and spectroscopic techniques, such as FE-SEM, HRTEM, FT-IR, Raman spectroscopy, XRD, elemental mapping and XPS, to demonstrate the successful synthesis of the composite. Besides, the electrochemical behavior of SmM/MWCNT/GCE for DMZ was also investigated using CV and DPV, and the modified electrode showed good electrochemical sensing performance for DMZ with a low detection limit (0.08 μM), a wide linear range (0.1∼1000 μM), and excellent selectivity. Finally, the SmM/MWCNT/GCE was successfully applied to detect DMZ in environmental and biological samples, and satisfactory recoveries (95%∼105%) were obtained. To the best of our knowledge, the synthesis of SmM/MWCNT and its application in electrochemical sensors are reported for the first time, which demonstrates that it can provide a new route for real-time monitoring of environmental pollutants.

二甲硝咪唑（DMZ）是一种常用的兽药，会造成大量排放和环境污染，而且 DMZ 残留物对人体具有致癌、遗传毒性和诱变性。因此，构建一种快速、灵敏、简单的传感器来监测 DMZ 至关重要。本研究合成了钼酸钐纳米片修饰多壁碳纳米管复合材料（SmM/MWCNT）来修饰 GCE，用于检测 DMZ。研究人员还利用各种分析和光谱技术，如 FE-SEM、HRTEM、傅立叶变换红外光谱、拉曼光谱、XRD、元素图谱和 XPS 等，对 SmM/MWCNT 材料进行了表征，以证明该复合材料的成功合成。此外，还利用 CV 和 DPV 研究了 SmM/MWCNT /GCE 对 DMZ 的电化学行为，结果表明改性电极对 DMZ 具有良好的电化学传感性能，检出限低（0.08 μM），线性范围宽（0.1∼1000 μM），选择性好。最后，SmM/MWCNT/GCE 被成功应用于环境和生物样品中 DMZ 的检测，并获得了令人满意的回收率（95%∼105%）。据我们所知，SmM/MWCNT 的合成及其在电化学传感器中的应用尚属首次报道，这为环境污染物的实时监测提供了一条新的途径。

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引用次数: 0

Structure–reactivity relationships in the removal efficiency of catechol and hydroquinone by structurally diverse Mn-oxides 结构不同的锰氧化物去除邻苯二酚和对苯二酚效率中的结构-反应关系。

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.2024.143602

Catechol and hydroquinone are widely present hydroxybenzene isomers in the natural environment that induce environmental toxicities. These hydroxybenzene compounds can be effectively removed by manganese (Mn)-oxides via sorption and oxidative degradation processes. In the present study, we investigated the structure–reactivity relationships in the sorption and oxidation of catechol and hydroquinone on Mn-oxide surfaces. Two widely present Mn-oxides, including hydrous Mn oxide (HMO) and cryptomelane, comprised of layer and tunnel structures, respectively, are specifically studied. Effects of Mn-oxide structures and environmental pH conditions on the removal efficiency of these hydroxybenzene compounds, via sorption and oxidative degradation, are investigated. Cryptomelane, which has a higher specific surface area than HMO, possesses a higher sorption and oxidation capacity. The complexation mechanisms of catechol and hydroquinone vary due to their structure-induced difference in reactivity. Catechol reduced and dissolved more Mn from Mn-oxides than hydroquinone, accompanied by a higher C loss of catechol-C, suggesting a higher reactivity of catechol. Structural changes occurred in the Mn-oxides resulting from reaction with catechol and hydroquinone: reduction of Mn(IV), corresponding formation of Mn(III) and Mn(II) in the mineral, and free Mn²⁺ ions released into the suspension. These insights could help us better understand and predict the fate of hydroxybenzene compounds in Mn-oxide-rich soils and wastewater treatment systems that generate Mn-oxides via Mn removal and the associated environmental toxicity.

邻苯二酚和对苯二酚是自然环境中广泛存在的羟苯异构体，会对环境造成毒害。锰（Mn）氧化物可通过吸附和氧化降解过程有效去除这些羟苯化合物。在本研究中，我们研究了邻苯二酚和对苯二酚在锰氧化物表面吸附和氧化过程中的结构-反应关系。具体研究了两种广泛存在的氧化锰，包括水合氧化锰（HMO）和隐锰，它们分别由层结构和隧道结构组成。研究了氧化锰结构和环境 pH 条件通过吸附和氧化降解对这些羟苯化合物去除效率的影响。与 HMO 相比，比表面积更大的隐色美兰具有更高的吸附和氧化能力。儿茶酚和对苯二酚的络合机制因其结构引起的反应性差异而不同。与对苯二酚相比，儿茶酚从锰氧化物中还原和溶解的锰更多，同时儿茶酚-C 的 C 损失更高，这表明儿茶酚的反应活性更高。与邻苯二酚和对苯二酚反应后，Mn-氧化物的结构发生了变化：Mn（IV）还原，矿物中相应形成了 Mn（III）和 Mn（II），悬浮液中释放出游离的 Mn2+ 离子。这些见解有助于我们更好地理解和预测羟苯化合物在富含锰氧化物的土壤和废水处理系统中的命运，这些土壤和废水处理系统通过除锰产生锰氧化物，并产生相关的环境毒性。

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引用次数: 0

Genome-wide analysis of detoxification genes conferring diamide insecticide resistance in Spodoptera exigua identifies CYP9A40 对使 Spodoptera exigua 对二胺类杀虫剂产生抗性的解毒基因进行全基因组分析，发现了 CYP9A40。

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.2024.143623

For over a decade, diamide insecticides have been effective against lepidopteran pests like beet armyworm, Spodoptera exigua (Hübner, 1808). However, the evolution of resistance poses a challenge to their sustainable use. We identified an I4790 M mutation in the S. exigua ryanodine receptor (RyR) gene, but its correlation with resistance varied across the field-collected Korean populations of S. exigua. RNA sequencing and differential gene expression analysis were performed to investigate other resistance mechanisms. Diamide-resistant and susceptible strains and F1 hybrids were compared by mapping RNA-seq reads to the S. exigua reference genome. CYP9A40 was identified as a critical gene in diamide resistance due to its high expression in the resistant strains. Synergist bioassays with piperonyl butoxide supported the role of P450s in diamide metabolic resistance in S. exigua. A strong positive correlation between CYP9A40 over-expression levels (up to 80-fold) and diamide LC₅₀ values was obtained for field-collected populations uniformly showing a 100% frequency of the RyR I4790 M target-site resistance allele. To validate the function of CYP9A40 in diamide detoxification, we recombinantly expressed the gene and tested its ability to bind and degrade chlorantraniliprole as a substrate. The results confirmed its catalytic role in diamide metabolism. CYP9A40 has been identified and validated to confer metabolic resistance in Korean S. exigua populations. It works alongside the RyR target-site I4790 M mutation to enhance diamide resistance. These mechanisms offer insights for resistance monitoring and support insecticide resistance management programs to improve control strategies for S. exigua.

十多年来，二酰胺类杀虫剂一直对甜菜夜蛾等鳞翅目害虫有效。然而，抗药性的演变对其可持续使用构成了挑战。我们在 S. exigua 的雷诺丁受体（RyR）基因中发现了一个 I4790M 突变，但在田间采集的韩国 S. exigua 种群中，该突变与抗性的相关性各不相同。为了研究其他抗性机制，进行了 RNA 测序和差异基因表达分析。通过将 RNA-seq 读数映射到 S. exigua 参考基因组，对二胺抗性和易感株系及 F1 杂交种进行了比较。由于 CYP9A40 在抗性菌株中的高表达，它被确定为二酰胺抗性的关键基因。用胡椒基丁醚进行的增效剂生物测定证实了 P450s 在 S. exigua 的二酰胺代谢抗性中的作用。在田间采集的种群中，CYP9A40的过量表达水平（高达80倍）与二酰胺的半致死浓度值之间存在很强的正相关性，这些种群中RyR I4790M靶位抗性等位基因的频率均为100%。为了验证 CYP9A40 在二酰胺解毒中的功能，我们重组表达了该基因，并测试了其结合和降解作为底物的氯虫苯甲酰胺的能力。结果证实了它在二酰胺代谢中的催化作用。经鉴定和验证，CYP9A40 在韩国 S. exigua 群体中具有代谢抗性。它与 RyR 靶位点 I4790M 突变一起增强了二酰胺的抗性。这些机制为抗药性监测提供了启示，并支持杀虫剂抗药性管理计划，以改进对 S. exigua 的控制策略。

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引用次数: 0

Polyimide-multiwalled carbon nanotubes composite as electrochemical sensing platform for the simultaneous detection of nitrophenol isomers 聚酰亚胺-多壁碳纳米管复合材料作为同时检测硝基苯酚异构体的电化学传感平台。

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.2024.143654

Developing novel electrode materials plays a crucial role in enhancing the electrochemical sensing performance of chemically modified electrodes. This research presents a composite electrode material based on polyimide incorporated with multiwalled carbon nanotubes (PI-MWCNT) for the simultaneous detection of three nitrophenol isomers (NPs). First, the composite was prepared and characterized using microscopies, spectroscopic techniques, and electrochemical experiments. The results indicated that the PI-MWCNT exhibited porosity and roughness, which facilitated the enhancement of its sensing performance. Afterward, the detection capabilities of PI-MWCNT towards NPs were evaluated through voltammetry experiments under optimal conditions. The differential pulse voltammetry (DPV) curves revealed three distinct anodic peaks in the NPs solution, with linear ranges of 1–300 μM for 2-NP, 0.25–250 μM for 3-NP, and 0.25–400 μM for 4-NP. The limits of detection (LOD) were 0.50 μM for both 2-NP and 3-NP, and 0.64 μM for 4-NP. Furthermore, the proposed electrode material was successfully applied to real samples, achieving recovery rates ranging from 92.9% to 106%. This study could contribute to the development of more efficient and sensitive electrochemical sensors.

开发新型电极材料对于提高化学修饰电极的电化学传感性能至关重要。本研究提出了一种基于聚酰亚胺与多壁碳纳米管（PI-MWCNT）的复合电极材料，用于同时检测三种硝基苯酚异构体（NPs）。首先，制备了该复合材料，并利用显微镜、光谱技术和电化学实验对其进行了表征。结果表明，PI-MWCNT 具有多孔性和粗糙度，这有利于提高其传感性能。随后，在最佳条件下通过伏安实验评估了 PI-MWCNT 对 NPs 的检测能力。微分脉冲伏安法（DPV）曲线显示了 NPs 溶液中三个不同的阳极峰，2-NP 的线性范围为 1-300 μM，3-NP 为 0.25-250 μM，4-NP 为 0.25-400 μM。2-NP 和 3-NP 的检测限均为 0.50 μM，4-NP 为 0.64 μM。此外，所提出的电极材料还成功地应用于实际样品，实现了 92.9% 至 106% 的回收率。这项研究有助于开发更高效、更灵敏的电化学传感器。

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引用次数: 0

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

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

Enhanced degradation of aqueous caffeine via cylindrical dielectric barrier discharge plasma: Efficacy and toxicity insights 通过圆柱形介质阻挡放电等离子体增强咖啡因水溶液的降解：功效和毒性分析。

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.2024.143620

An environmentally friendly approach for caffeine degradation was explored in this study utilizing cylindrical dielectric barrier discharge (CDBD) plasma. The current-voltage characteristics and the plasma parameters of the CDBD, such as the electron temperature, electron density, density of nitrogen excited states, vibrational temperature, and rotational temperature, were assessed through electrical and optical characterization respectively. Fourier-transform infrared spectroscopy (FTIR) was employed to evaluate the reactive oxygen and nitrogen species (RONS) in the plasma-treated air. The physicochemical properties of deionized water (DW) were measured. To gain a deeper insight into the role of RONS in caffeine degradation, their concentrations in DW were analyzed. Furthermore, the effects of initial concentration, sample volume, and pH on caffeine degradation were investigated. The highest degradation of caffeine was 94% at initial concentration of 50 mg L⁻¹, sample volume 50 mL and in neutral pH. Liquid chromatography–mass spectrometry (LC-MS) was then used to propose the degradation pathway for caffeine. The major reactive species involved in caffeine degradation was ozone. Finally, the phytotoxicity and cytotoxicity of caffeine were assessed before and after plasma treatment with plasma-treated caffeine (PTC) showing minimal toxicity to both plants and cells.

本研究利用圆柱形介质阻挡放电（CDBD）等离子体探索了一种环境友好型咖啡因降解方法。通过电学和光学表征，分别评估了 CDBD 的电流电压特性和等离子体参数，如电子温度、电子密度、氮激发态密度、振动温度和旋转温度。傅立叶变换红外光谱（FTIR）用于评估经等离子体处理的空气中的活性氧和氮物种（RONS）。此外，还测量了去离子水（DW）的理化性质。为了更深入地了解 RONS 在咖啡因降解过程中的作用，对其在去离子水中的浓度进行了分析。此外，还研究了初始浓度、样品量和 pH 值对咖啡因降解的影响。当初始浓度为 50 mg L-1、样品量为 50 mL 且 pH 值为中性时，咖啡因的降解率最高，达到 94%。随后，利用液相色谱-质谱法（LC-MS）提出了咖啡因的降解途径。参与咖啡因降解的主要活性物种是臭氧。最后，对咖啡因在等离子处理前后的植物毒性和细胞毒性进行了评估，结果表明等离子处理咖啡因（PTC）对植物和细胞的毒性都很小。

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引用次数: 0

Polyethylene microplastic modulates the toxicity of pentachlorophenol to the microalgae Isochrysis galbana, clone t-ISO 聚乙烯微塑料可调节五氯苯酚对微型藻类 Isochrysis galbana（克隆 t-ISO）的毒性。

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.2024.143588

Pentachlorophenol (PCP) and polyethylene microplastic (PE-MP) have been designated as emerging and persistent pollutants, respectively. The combined effects of those pollutants are still unknown, especially to organisms like phytoplankton that may adsorb to their surface. Therefore, the purpose of this study was to investigate for the first time the effects of PE-MP alone and in combination with PCP on the microalgae Isochrysis galbana, clone t-ISO following 72 h of exposure. Photosynthetic pigments amounts, carotenoid, protein, carbohydrate and fatty acids have been assessed. Acute toxicity test showed that the 72 h median inhibition concentration (72 h-EC₅₀) was 148.2, 0.66 and 087 mg L⁻¹ for PE-MP, PCP and their mixture. The utmost effects in growth inhibition rates were noted with 0.5 and 1.25 mg L⁻¹ PCP (23% and 85%, respectively), and 100 and 300 mg L⁻¹ PE-MP (49% and 64%, respectively). Moreover, it was found that those concentrations had a major impact on the photosynthetic pigments, protein, carbohydrate, and fatty acids amounts in algal cells. Furthermore, levels of H₂O₂ and Malondialdehyde (MDA), as well as the activities of catalase (CAT), superoxide dismutase (SOD), and ascorbate peroxidase (APX), indicated the induction of an oxidative stress in algal cells. It appears that adding PE-MP at a no-effect concentration (25 mg L⁻¹) reduces the toxicity caused by PCP due to its adsorption to polyethylene microplastics.

五氯苯酚（PCP）和聚乙烯微塑料（PE-MP）已分别被指定为新兴污染物和持久性污染物。这些污染物的综合影响尚不清楚，尤其是对可能吸附在其表面的浮游植物等生物的影响。因此，本研究的目的是首次调查 PE-MP 单独和与五氯苯酚一起暴露 72 小时后对微藻类 Isochrysis galbana（克隆 t-ISO）的影响。对光合色素、类胡萝卜素、蛋白质、碳水化合物和脂肪酸的含量进行了评估。急性毒性试验表明，PE-MP、五氯苯酚及其混合物的 72 小时中位抑制浓度（72 小时-EC50）分别为 148.2、0.66 和 087 毫克/升。0.5 和 1.25 毫克/升五氯苯酚（分别为 23% 和 85%）以及 200 和 300 毫克/升 PE-MP（分别为 49% 和 64%）对生长抑制率的影响最大。此外，研究还发现，这些浓度对藻类细胞中的光合色素、蛋白质、碳水化合物和脂肪酸含量有重大影响。此外，H2O2 和丙二醛（MDA）的含量，以及过氧化氢酶（CAT）、超氧化物歧化酶（SOD）和抗坏血酸过氧化物酶（APX）的活性，都表明藻类细胞中存在氧化应激。在无效应浓度（25 毫克/升-1）下添加 PE-MP 似乎能降低五氯苯酚因吸附在聚乙烯微塑料上而产生的毒性。

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引用次数: 0

Facile synthesis of activated carbon/titanium dioxide composite and its application for adsorptive/photocatalytic removal of gaseous toluene 活性炭/二氧化钛复合材料的简便合成及其在气态甲苯吸附/光催化去除中的应用

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.2024.143638

The practical utility of activated carbon/titanium dioxide (AC/TiO₂) composite has been investigated for the abatement of a common aromatic volatile organic compound (VOC), toluene. The adsorption and photocatalytic performance of the prepared AC/TiO₂ composites (ACT-x: x as the theoretical mass ratio (in percent) of AC over TiO₂ ranging from 0% to 10%) is evaluated individually against gaseous toluene using a packed flow tube reactor under varying operational conditions (e.g., relative humidity and gaseous pollutant composition). The presence of AC in the composite significantly increases the adsorption capacity (Q) such as 1.71 mg g⁻¹ for ACT-10 relative to 0.01 mg g⁻¹ for ACT-0. The ACT-5, with 3.6% C, exhibits the maximum photocatalytic removal efficiency (X_T = 93.77%), quantum efficiency (QE; 1.63 × 10⁻⁴ molecules photon⁻¹), space time yield (STY; 1.99 × 10⁻⁵ molecules photon⁻¹ mg⁻¹), and specific clear air delivery rate (SCADR; 686.2 L h⁻¹ g⁻¹) among all the ACT compositions tested. ACT-5 exhibits enhanced potential for adsorption and in-situ degradation-desorption to facilitate the removal of VOCs with the reduced yield of by-products. The in-situ diffuse reflectance infrared Fourier transform spectroscopy and gas chromatography-mass spectrometry analyses indicate the formation of several intermediate by-products during the photocatalytic degradation process, including benzyl alcohol, benzaldehyde, benzoic acid, phenol, and alkane species. In addition, the photocatalytic performance of ACT is demonstrated to be superior to those of other TiO₂-based photocatalysts. Accordingly, the ACT composite is recommended as a promising medium for the abatement of aromatic VOCs in indoor air.

研究了活性炭/二氧化钛（AC/TiO2）复合材料在减少常见芳香族挥发性有机化合物（VOC）甲苯方面的实用性。在不同的操作条件（如相对湿度和气态污染物成分）下，使用填料流管反应器对所制备的活性炭/二氧化钛复合材料（ACT-x：x 为活性炭相对于二氧化钛的理论质量比（百分比），从 0% 到 10% 不等）对气态甲苯的吸附和光催化性能进行了单独评估。复合材料中 AC 的存在大大提高了吸附容量（Q），例如 ACT-10 的吸附容量为 1.71 mg g-1，而 ACT-0 为 0.01 mg g-1。ACT-5 的 C 含量为 3.6%，在所有测试的 ACT 成分中，其光催化去除效率（XT = 93.77%）、量子效率（QE；1.63 × 10-4 分子光子-1）、时空产率（STY；1.99 × 10-5 分子光子-1 毫克-1）和特定净空气输送率（SCADR；686.2 升/小时-1 克-1）均为最高。ACT-5 显示出更强的吸附和原位降解-解吸潜力，有助于去除挥发性有机化合物，同时减少副产品的产量。原位漫反射红外傅立叶变换光谱和气相色谱-质谱分析表明，在光催化降解过程中形成了几种中间副产物，包括苯甲醇、苯甲醛、苯甲酸、苯酚和烷烃类。此外，ACT 的光催化性能还优于其他基于二氧化钛的光催化剂。因此，建议将 ACT 复合材料作为一种有前途的媒介，用于减少室内空气中的芳香族挥发性有机化合物。

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引用次数: 0

The impact of microplastics on lake communities: A mesocosm study 微塑料对湖泊群落的影响：中观宇宙研究

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.2024.143600

Plastics are pervasive pollutants that are being produced at an increasing rate to meet consumer demands. After entering the environment, plastics can break down, creating smaller fragments, including secondary microplastics. Microplastic contamination in lakes has been recorded worldwide, and the ingestion of microplastics has been documented in zooplankton, macroinvertebrates, and fish. Microplastic ingestion and exposure can cause varying deleterious effects on these organism groups, but the impact of realistic microplastic concentrations on whole freshwater food webs requires further study. We addressed these knowledge gaps by conducting an 8-week experiment factorially crossing microplastic addition at a concentration of 1.5 particles/L with a fish predator (perch, Perca fluviatilus) presence in 1200-L outdoor mesocosms. Microplastic exposure had time-varying effects on zooplankton abundance, with a lower abundance of zooplankton in plastic treatments at the end of the experiment. Although microplastics had no impact on total macroinvertebrate abundance, there were effects on individual taxa. In the presence of microplastics, the cased caddisfly Triplectides spp. had a significantly lower abundance, which may have led to an increase in the snail Gyraulus spp. in week eight. Across the benthic and pelagic invertebrate communities, there were near-significant compositional differences between control and plastic treatments. These findings indicate that microplastic exposure may negatively impact freshwater invertebrate communities, even at low, field-realistic concentrations representative of the densities currently found in lakes.

塑料是一种普遍存在的污染物，为了满足消费者的需求，其生产速度越来越快。塑料进入环境后会分解，产生更小的碎片，包括二次微塑料。世界各地都有湖泊受到微塑料污染的记录，浮游动物、大型无脊椎动物和鱼类也有摄入微塑料的记录。微塑料的摄入和暴露会对这些生物群体造成不同程度的有害影响，但现实中微塑料浓度对整个淡水食物网的影响还需要进一步研究。为了填补这些知识空白，我们在 1200 升室外中置池中进行了为期 8 周的实验，将微塑料添加浓度为 1.5 微粒/升与鱼类捕食者（鲈鱼）的存在进行因子交叉。微塑料暴露对浮游动物丰度的影响随时间而变化，实验结束时，塑料处理的浮游动物丰度较低。虽然微塑料对大型无脊椎动物的总丰度没有影响，但对个别类群有影响。在有微塑料存在的情况下，有壳笛鲷的丰度明显降低，这可能导致第 8 周蜗牛的丰度增加。在底栖和浮游无脊椎动物群落中，对照组和塑料处理组之间的成分差异接近显著。这些研究结果表明，接触微塑料可能会对淡水无脊椎动物群落产生负面影响，即使是在代表目前湖泊中无脊椎动物密度的低野外现实浓度下也是如此。

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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

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