Journal of Environmental Chemical Engineering最新文献_第8页

Advances in the application of superhydrophobic fabric surfaces for oil-water separation and extension of functionalization 超疏水织物表面在油水分离和功能化扩展方面的应用进展

IF 7.4 2区工程技术 Q1 ENGINEERING, CHEMICAL

Journal of Environmental Chemical Engineering

Pub Date : 2024-09-18 DOI: 10.1016/j.jece.2024.114156

In recent years, the ecological and environmental problems caused by the frequent occurrence of chemical spills have become more and more serious, and the oil-water separation technology has received more and more attention. Superhydrophobic fabric surface construction has attracted much attention in the field of oil-water separation due to the special surface wettability. However, its lack of functionalisation hinders the wide application of fabrics in the field of oil-water separation. In order to build superhydrophobic fabric surfaces that can be adapted to various environments, researchers are constantly optimising materials and preparation techniques. Therefore, endowing superhydrophobic fabrics with multifunctionality will further expand the application scenarios in the field of oil-water separation. This paper reviews the various techniques used in recent years to construct fabric superhydrophobic surfaces and discusses how the extension of various functions has contributed to oil-water separation research. We mainly classify the current superhydrophobic fabric surface preparation techniques and the preparation schemes of functional fabrics, summarise the currently available applications of functional features for oil-water separation, and then present our viewpoints. Finally, the prospects for the application of superhydrophobic fabric surfaces are outlined.

近年来，由于化学品泄漏事件频发而引发的生态环境问题日益严重，油水分离技术越来越受到人们的关注。超疏水织物表面结构因其特殊的表面润湿性，在油水分离领域备受关注。然而，超疏水织物缺乏功能化，阻碍了其在油水分离领域的广泛应用。为了制造出适应各种环境的超疏水织物表面，研究人员正在不断优化材料和制备技术。因此，赋予超疏水织物多功能性将进一步扩大其在油水分离领域的应用范围。本文回顾了近年来用于构建织物超疏水表面的各种技术，并讨论了各种功能的扩展如何促进了油水分离研究。我们主要对目前的超疏水织物表面制备技术和功能织物的制备方案进行了分类，总结了目前功能特性在油水分离方面的应用，然后提出了我们的观点。最后，概述了超疏水织物表面的应用前景。

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引用次数: 0

Photocatalytic antibiotic degradation in coated open microchannels by applying 2D and 3D flow modeling with kinetics 应用二维和三维流体动力学建模研究涂层开放微通道中的光催化抗生素降解问题

IF 7.4 2区工程技术 Q1 ENGINEERING, CHEMICAL

Journal of Environmental Chemical Engineering

Pub Date : 2024-09-18 DOI: 10.1016/j.jece.2024.114173

The accumulation of active pharmaceutical ingredients in the aqueous environment is a serious problem that will become even more concerning in the future. In this work, the photocatalytic degradation of ciprofloxacin (CIP) in aqueous solution was assessed over P25-TiO₂ coated open microchannels with gravity-driven flow under UV-A irradiation. The deposition of different amounts of TiO₂ in the microchannels was carried out via a facile, self-developed procedure. The degradation kinetics of ciprofloxacin was described via the Langmuir-Hinshelwood mechanism. Since the flow characteristics in the microchannel had influence on the concentration distribution of CIP in the microchannel, the coupled momentum and mass conservation law was solved numerically in MATLAB 2023a (2D case) as well as in ANYS Fluent 2023 R1 (2D and 3D cases). Although the implemented 2D model in MATLAB 2023a allowed the preliminary estimation of the selected kinetic parameters, namely adsorption equilibrium constant and specific Langmuir-Hinshelwood rate constant, the sensitivity of the model was not satisfactory which was attributed to the empirical correlations used for the estimation of the external mass transfer coefficient. The 2D and 3D models in ANSYS Fluent 2023 R1 predicted efficiently the outlet concentration of ciprofloxacin for different inlet CIP concentrations and liquid phase flow rates. Therefore, the as developed 2D and 3D models in ANSYS Fluent 2023 R1 can be used for the design of reactors containing coated microchannels with gravity-driven flow for photocatalytic degradation of active pharmaceutical ingredients.

活性药物成分在水环境中的蓄积是一个严重的问题，今后将变得更加令人担忧。在这项研究中，研究人员在紫外线-A 的照射下，通过 P25-TiO2 涂层开放式微通道，在重力驱动下对水溶液中环丙沙星（CIP）的光催化降解进行了评估。在微通道中沉积不同数量的 TiO2 是通过一种简便的自主开发的程序进行的。环丙沙星的降解动力学是通过 Langmuir-Hinshelwood 机制来描述的。由于微通道中的流动特性会影响 CIP 在微通道中的浓度分布，因此在 MATLAB 2023a（二维情况）和 ANYS Fluent 2023 R1（二维和三维情况）中对耦合动量和质量守恒定律进行了数值求解。虽然 MATLAB 2023a 中执行的二维模型可以初步估算所选动力学参数，即吸附平衡常数和比朗缪尔-欣舍伍德速率常数，但模型的灵敏度并不令人满意，这归因于用于估算外部传质系数的经验相关性。ANSYS Fluent 2023 R1 中的二维和三维模型有效预测了不同入口 CIP 浓度和液相流速下环丙沙星的出口浓度。因此，ANSYS Fluent 2023 R1 中开发的二维和三维模型可用于设计含有重力驱动流涂层微通道的反应器，以实现活性药物成分的光催化降解。

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引用次数: 0

Carbon, nitrogen, and phosphorus release characteristics and underlying mechanisms in fish manure from recirculating aquaculture systems under alternating aerobic-anaerobic conditions 好氧-厌氧交替条件下循环水产养殖系统鱼粪中碳、氮和磷的释放特征及内在机制

IF 7.4 2区工程技术 Q1 ENGINEERING, CHEMICAL

Journal of Environmental Chemical Engineering

Pub Date : 2024-09-18 DOI: 10.1016/j.jece.2024.114185

To mitigate the adverse environmental impacts of aquaculture operations, recirculating aquaculture systems (RASs) have emerged as promising alternatives to traditional aquaculture methods. Fish manure is the primary pollutant in RASs, and oxygen fluctuations significantly influencing the release of pollutants. However, the release characteristics and underlying mechanisms of carbon (C), nitrogen (N), and phosphorus (P) during alternating aerobic-anaerobic conditions in RASs remain poorly understood. This study conducted batch incubation experiments to examine the release dynamics of C, N, and P from fish manure under simulated alternating aerobic-anaerobic conditions. Results showed that the overlying water exhibited anaerobic and reductive conditions, with both COD and TOC concentrations decreasing over time. NH₄⁺-N levels significantly decreased from days 1–9, while NO₃^--N concentrations peaked on day 16. Furthermore, the alternating aerobic-anaerobic conditions significantly increased TP concentration in the overlying water. Soluble microbial byproduct-like substances in the overlying water transformed into humic acid-like substances over time. The relative abundance of Proteobacteria and Firmicutes decreased by 13.6 % and 6 %, respectively, while the relative abundance of Actinobacteria, Bacteroidota, and Chloroflexi increased by 7 %, 12.8 %, and 1.4 %, respectively. Overall, both abiotic and biotic factors influenced the release of C, N, and P from fish manure. The coupled effects of abiotic factors, specific bacterial communities, and functional genes played a critical role in the release and transformation of these elements. These findings provide new insights into the release behaviours and mechanisms of pollutants in RASs, contributing to improved environmental risk management in RASs.

为减轻水产养殖对环境的不利影响，循环水养殖系统（RAS）已成为替代传统水产养殖方法的一种有前途的方法。鱼粪是 RAS 中的主要污染物，而氧气的波动对污染物的释放有很大影响。然而，人们对 RASs 中好氧-厌氧交替条件下碳（C）、氮（N）和磷（P）的释放特性和基本机制仍然知之甚少。本研究进行了分批培养实验，以研究在模拟好氧-厌氧交替条件下鱼粪中碳、氮和磷的释放动态。结果表明，上覆水体呈现厌氧和还原状态，随着时间的推移，COD 和 TOC 浓度都在下降。NH4+-N 浓度在第 1-9 天显著下降，而 NO3-N 浓度在第 16 天达到峰值。此外，好氧-厌氧交替条件显著增加了上层水中的 TP 浓度。随着时间的推移，上覆水中的可溶性微生物副产物样物质转化为腐殖酸样物质。蛋白细菌和固氮菌的相对丰度分别下降了 13.6% 和 6%，而放线菌、类杆菌和绿藻的相对丰度分别增加了 7%、12.8% 和 1.4%。总体而言，非生物因素和生物因素都影响了鱼粪中碳、氮和磷的释放。非生物因素、特定细菌群落和功能基因的耦合效应在这些元素的释放和转化过程中发挥了关键作用。这些发现为了解 RAS 中污染物的释放行为和机制提供了新的视角，有助于改善 RAS 的环境风险管理。

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引用次数: 0

Hierarchical graphene oxide/nano-pyramidal stainless-steel on nickel foam substrate: A flexible electrochemical sensor for arsenic compound detection 泡沫镍基底上的分层氧化石墨烯/纳米金字塔不锈钢：用于砷化合物检测的柔性电化学传感器

IF 7.4 2区工程技术 Q1 ENGINEERING, CHEMICAL

Journal of Environmental Chemical Engineering

Pub Date : 2024-09-18 DOI: 10.1016/j.jece.2024.114179

The organoarsenic compound roxarsone (ROX) is added to chicken feed to enhance nutritional value. Although organic arsenic is generally less harmful than inorganic arsenic, concerns have arisen about its potential to transform into inorganic forms when excreted in animal waste, raising environmental and human health concerns. The potential dangers of long-term ROX exposure require reliable methods for the detection of the target analyte. In the current study, fabricated nanoscale graphene oxide (GO)/stainless steel (SS) pyramidal structures on nickel foam (NF) is used as an electrode in the electrochemical detection of ROX. The proposed sensor was shown to outperform existing devices in terms of electrochemical activity, resulting in a wider linear range of detection for ROX (0.05–83.15 µM) and lower detection limit (LOD) (0.006 µM). Further, real sample analysis on water and meat samples confirmed the feasibility of the proposed GO/SS/NF sensor for the real-time detection of ROX in real-world applications. This research provides evidence to support the development of heterojunctions to improve ion transport channels and surface-active sites to promote ion mobility to enhance electrochemical responses.

有机胂化合物洛克沙砷（ROX）被添加到鸡饲料中，以提高营养价值。虽然有机砷的危害通常小于无机砷，但人们担心有机砷在动物排泄物中排出后会转化为无机砷，从而引发环境和人类健康问题。长期接触 ROX 的潜在危险要求采用可靠的方法来检测目标分析物。在当前的研究中，在泡沫镍（NF）上制造的纳米级氧化石墨烯（GO）/不锈钢（SS）金字塔结构被用作电化学检测 ROX 的电极。结果表明，该传感器在电化学活性方面优于现有装置，因此 ROX 的线性检测范围更广（0.05-83.15 µM），检测限（LOD）更低（0.006 µM）。此外，对水和肉类样品的实际分析证实了所提议的 GO/SS/NF 传感器在实际应用中实时检测 ROX 的可行性。这项研究为开发异质结以改善离子传输通道和表面活性位点以促进离子迁移以增强电化学响应提供了证据支持。

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引用次数: 0

Green synthesis of a multifunctional β-cyclodextrin modified polymer sorbent using agrarian wastes of Nelumbo nucifera for the efficient sequestration of toxic dyes from polluted water 利用 Nelumbo nucifera 农业废弃物绿色合成多功能 β-环糊精改性聚合物吸附剂，以高效吸附污染水体中的有毒染料

IF 7.4 2区工程技术 Q1 ENGINEERING, CHEMICAL

Journal of Environmental Chemical Engineering

Pub Date : 2024-09-18 DOI: 10.1016/j.jece.2024.114147

This study explores an eco-friendly strategy for the effective removal of toxic dyes Malachite Green, Methylene Blue, and Basic Magenta Dye, from water bodies, utilizing a novel β-Cyclodextrin modified Nelumbo nucifera (β-CDNN) sorbent. The sorbent was characterized using different analytical techniques, to assess its dye sorption capability. The analysis of sorption isotherm data revealed that the Freundlich model most accurately represented the equilibrium data. Kinetic studies indicated that the sorption process followed a pseudo-second-order model. At pH 5–8, the sorbent achieved maximum removal efficiencies of 96.7 %, 94.2 %, and 96.3 % for Malachite Green (402.7 mg/g), Methylene Blue (385.6 mg/g), and Basic Magenta Dye (401.03 mg/g), respectively, at equilibrium time 60 mins for MAG & MEB and 80 mins for MAD. The maximum swelling capacity of β-CDNN was recorded at 180.4 % and selectivity assay was performed via a MAG-AO7 dye mixture. The sorbent reusability was recorded for six consecutive cycles without much loss in efficiency. Additionally, β-CDNN exhibited a removal efficiency of 91.3 % in real dye samples. The findings highlight the rapid dye adsorption capabilities of β-CDNN, establishing it as a versatile, cost-effective, and environmentally friendly solution for water remediation, while also underscoring the beneficial use of bio-waste materials.

本研究利用新型 β-Cyclodextrin modified Nelumbo nucifera (β-CDNN)吸附剂，探索了一种有效去除水体中孔雀石绿、亚甲基蓝和碱性品红染料的环保策略。该吸附剂采用不同的分析技术进行表征，以评估其染料吸附能力。对吸附等温线数据的分析表明，Freundlich 模型最准确地代表了平衡数据。动力学研究表明，吸附过程遵循伪二阶模型。在 pH 值为 5-8 时，吸附剂对孔雀石绿（402.7 毫克/克）、亚甲蓝（385.6 毫克/克）和碱性品红染料（401.03 毫克/克）的最大去除率分别为 96.7%、94.2% 和 96.3%，对 MAG & MEB 的最大去除率为 60 分钟，对 MAD 的最大去除率为 80 分钟。β-CDNN 的最大溶胀能力为 180.4%，并通过 MAG-AO7 染料混合物进行了选择性检测。根据记录，吸附剂可连续重复使用六个周期，而效率不会有太大损失。此外，β-CDNN 在实际染料样品中的去除率为 91.3%。研究结果凸显了 β-CDNN 对染料的快速吸附能力，使其成为一种多功能、经济高效且环保的水处理解决方案，同时也强调了生物废料的有益利用。

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引用次数: 0

The phagotrophic growth of algae on bacteria and its potential for wastewater and waste sludge treatment 藻类在细菌上的吞噬生长及其在废水和废渣处理中的潜力

IF 7.4 2区工程技术 Q1 ENGINEERING, CHEMICAL

Journal of Environmental Chemical Engineering

Pub Date : 2024-09-17 DOI: 10.1016/j.jece.2024.114166

Algae exhibit diverse growth strategies, including phototrophy, osmotrophy, and phagotrophy. While phototrophic and osmotrophic growths have been extensively studied, phagotrophic growth remains relatively unexplored. This research delves into the phagotrophic growth of Ochromonas danica on bacteria, evaluating its potential for wastewater and waste sludge treatment. The study reveals that O. danica was able to grow on bacteria without light or additional nutrients, achieving a doubling time of 3.5–3.9 hours and converting 41–45 % of bacterial organic matter into algal biomass. The resultant O. danica cells were lipid-rich, containing 35–46 % lipids by dry weight. The efficiency of O. danica in treating waste sludge was highlighted, achieving a 43 % reduction in organic matter within 36 hours, outperforming conventional aerobic digestion. The study also highlights the potential of O. danica in wastewater treatment. An approach was developed to reclaim organic matter from wastewater through a two-stage process, in which bacteria were first grown on wastewater organic matter and then the grown bacteria were fed to O. danica for growth. Results show that a total of 78.2 % of the initial wastewater organic matter was removed through this approach and 27.3 % of the removed organic matter was converted into lipid-rich algal biomass. The findings underscore the potential of phagotrophic growth for waste treatment and lipid production. The simplicity of the phagotrophic process, independent of light or complex nutrient supplementation, positions it as a promising strategy for industrial applications in waste sludge and wastewater treatment.

藻类的生长策略多种多样，包括趋光性、渗透性和吞噬性。光营养生长和渗透营养生长已被广泛研究，而噬营养生长相对来说仍未被探索。本研究深入探讨了丹顶鹤对细菌的吞噬生长，评估了其在废水和废渣处理方面的潜力。研究发现，丹顶鹤能够在没有光照或额外营养物质的情况下在细菌上生长，实现 3.5-3.9 小时的倍增时间，并将 41-45% 的细菌有机物转化为藻类生物量。产生的 O. danica 细胞富含脂质，按干重计算含 35-46% 的脂质。该研究强调了 O. danica 处理废弃污泥的效率，在 36 小时内减少了 43% 的有机物质，优于传统的好氧消化。该研究还强调了 O. danica 在废水处理方面的潜力。研究人员开发了一种方法，通过两个阶段的过程从废水中回收有机物，首先在废水有机物上培养细菌，然后将培养出的细菌喂给丹顶鹤生长。结果表明，通过这种方法共去除 78.2% 的初始废水有机物，去除的有机物中有 27.3% 转化为富含脂质的藻类生物量。这些发现强调了噬养生长在废物处理和脂质生产方面的潜力。噬养过程简单，不受光照或复杂养分补充的影响，这使其成为废物污泥和废水处理工业应用的一种有前途的策略。

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引用次数: 0

Novel assessment of molten salt oxidation for cation exchange resin treatment: Effective neutralization of sulfurous gas with Li2CO3-Na2CO3-K2CO3 system 用于阳离子交换树脂处理的熔盐氧化新评估：用 Li2CO3-Na2CO3-K2CO3 系统有效中和含硫气体

IF 7.4 2区工程技术 Q1 ENGINEERING, CHEMICAL

Journal of Environmental Chemical Engineering

Pub Date : 2024-09-17 DOI: 10.1016/j.jece.2024.114161

The conventional thermal treatment of cation exchange resin substantially releases sulfurous gases, causing significant equipment corrosion and air pollution. In contrast, the Li₂CO₃-Na₂CO₃-K₂CO₃ as an alkaline molten system effectively neutralizes sulfur gas and mitigates waste gas production inherent in thermal oxidation methods. In the molten salt oxidation process, the volume concentration of SO₂ was reduced by 81.7 % compared to that in the traditional thermal oxidation process, and this method reduces the generation of hazardous gases such as CO, CH₄, and C₂H₆. The integration of online gas mass spectrometry and phase stability diagrams for carbonate and sulfur interception products demonstrate excellent thermodynamic stability during the molten salt oxidation (MSO) process. Moreover, a more accurate assessment of the acid gas neutralization capacity of the molten salt system is provided, and the acid gas neutralization capacity of the Li₂CO₃-Na₂CO₃-K₂CO₃ carbonate system can reach 82.58 % at 800 °C. The predominant contributors to acid gas neutralization are Na₂CO₃ and K₂CO₃, as evidenced by waste salt composition and ternary phase diagrams. The stable presence of Li₂CO₃ throughout the MSO process contributes to the lowering of the melting point of the carbonate system to 393 °C.

阳离子交换树脂的传统热处理方法会大量释放含硫气体，造成严重的设备腐蚀和空气污染。相比之下，作为碱性熔融体系的 Li2CO3-Na2CO3-K2CO3 能有效中和硫化气体，减少热氧化法固有的废气产生。在熔盐氧化工艺中，二氧化硫的体积浓度比传统热氧化工艺降低了 81.7%，而且这种方法还减少了 CO、CH4 和 C2H6 等有害气体的产生。在线气体质谱分析法与碳酸盐和硫截取产物相稳定图的整合表明，熔盐氧化（MSO）工艺具有出色的热力学稳定性。此外，还对熔盐体系的酸性气体中和能力进行了更精确的评估，在 800 °C 时，Li2CO3-Na2CO3-K2CO3 碳酸盐体系的酸性气体中和能力可达 82.58%。从废盐组成和三元相图中可以看出，酸性气体中和的主要成分是 Na2CO3 和 K2CO3。Li2CO3 在整个 MSO 过程中的稳定存在有助于将碳酸盐体系的熔点降至 393 ℃。

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引用次数: 0

Rational design of ligand-immobilized Rh/IRMOFs catalysts for 1-butene hydroformylation with high regioselectivity 高区域选择性 1-丁烯加氢甲酰化配体固定化 Rh/IRMOFs 催化剂的合理设计

IF 7.4 2区工程技术 Q1 ENGINEERING, CHEMICAL

Journal of Environmental Chemical Engineering

Pub Date : 2024-09-17 DOI: 10.1016/j.jece.2024.114163

The diverse pore structures and excellent tunable proprieties of IRMOFs materials made the possibility to explore the effect of the mode of ligand-immobilization on its catalytic performance for 1-butene hydroformylation. In this work, we report a successful case of theory-guided rational design of a highly active ligand-immobilized Rh/IRMOF catalyst based on previous work. Density functional theory calculations of elementary reaction barriers for 1-butene hydroformylation over 1Rh/IRMOFs-PPh₃ models (IRMOF-1, -8, -10, -14, and -16) were performed. The calculation results and topographic steric maps analysis predicted that 1Rh/IRMOF-10-PPh₃ have superior catalytic performance. This can be attributed to the “shape-selective” effect of phosphine ligands grafted in the backbone on the reactive transition state. In addition, the anchoring positions of the phenyl phosphine ligand grafting on the skeleton of 1Rh/IRMOF-10-PPh₃ was identified in details. The 1Rh/IRMOF-10-PPh₃[3‐3] was predicted to have the highest n/i ratio. In order to verify the theoretical prediction, 1Rh/IRMOF-10–32PPh₃ catalyst was prepared by post-synthesis strategy and the n/i ratio was experimentally confirmed to be 3.49, which outperform the previous 1Rh/MOF-5-PPh₃ catalyst. This work suggests that the 1Rh/IRMOF-10-PPh₃ catalyst can be a promising catalyst for hydroformylation reactions.

IRMOFs 材料具有多样的孔结构和优异的可调性，这为探索配体固定化模式对 1-丁烯加氢甲酰化催化性能的影响提供了可能。在这项工作中，我们报告了在前人工作的基础上，在理论指导下合理设计高活性配体固定化 Rh/IRMOF 催化剂的成功案例。我们对 1Rh/IRMOFs-Ph3（IRMOF-1、-8、-10、-14 和 -16）模型上 1-丁烯加氢甲酰化的基本反应壁垒进行了密度泛函理论计算。计算结果和拓扑立体图分析表明，1Rh/IRMOF-10-PPh3 具有更优越的催化性能。这可归因于接枝在骨架上的膦配体对反应过渡态的 "形状选择 "效应。此外，还详细确定了接枝在 1Rh/IRMOF-10-PPh3 骨架上的苯基膦配体的锚定位置。根据预测，1Rh/IRMOF-10-Ph3[3-3] 的 n/i 比值最高。为了验证理论预测，采用后合成策略制备了 1Rh/IRMOF-10-32PPh3 催化剂，实验证实其 n/i 比为 3.49，优于之前的 1Rh/MOF-5-Ph3 催化剂。这项工作表明，1Rh/IRMOF-10-PPh3 催化剂是一种很有前途的加氢甲酰化反应催化剂。

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引用次数: 0

Chlorpyrifos degradation by Shewanella oneidensis MR-1: Characteristics and mechanism analysis Shewanella oneidensis MR-1 对毒死蜱的降解：特征和机理分析

IF 7.4 2区工程技术 Q1 ENGINEERING, CHEMICAL

Journal of Environmental Chemical Engineering

Pub Date : 2024-09-17 DOI: 10.1016/j.jece.2024.114162

This study conducted a series of experiments to investigate the degradation performance and mechanism of chlorpyrifos (CPF) degradation by Shewanella oneidensis MR-1 (S. oneidensis MR-1). The results showed that the S. oneidensis MR-1 degradation CPF rate was maximized at a salinity of 10 g·L⁻¹, 35 °C, pH 7, and an inoculum amount of 20 %. The simultaneous addition of anthraquinone sodium 2,6-disulfonate (AQDS) and goethite [FeO(OH)] were able to increase the degradation efficiency to 174.12 %. Further, SEM results showed the FeO(OH) surface might provide a dense reaction site for the degradation. XRD and FTIR analysis revealed the hydroxyl group participated in the degradation process. XPS analysis showed that the addition of AQDS and FeO(OH) promoted the conversion of Fe(III) to enhance the degradation of CPF. Meanwhile, metabolites analysis, indicated that S. oneidensis MR-1 regulated its antioxidant capacity by enhancing its amino acid metabolism and lipid biosynthesis to cope with CPF stress. This work could provide new insights for efficient CPF removal in the future.

本研究通过一系列实验研究了Shewanella oneidensis MR-1 （S. oneidensis MR-1）降解毒死蜱（CPF）的性能和机理。结果表明，在盐度为 10 g-L-1、温度为 35 °C、pH 值为 7、接种量为 20 % 的条件下，S. oneidensis MR-1 降解 CPF 的速率最大。同时添加 2,6-二磺酸蒽醌钠（AQDS）和鹅卵石[FeO(OH)]可将降解效率提高到 174.12%。此外，SEM 结果表明，FeO(OH) 表面可能为降解提供了一个致密的反应位点。XRD 和 FTIR 分析表明羟基参与了降解过程。XPS 分析表明，AQDS 和 FeO(OH) 的加入促进了 Fe(III) 的转化，从而增强了 CPF 的降解。同时，代谢物分析表明，S. oneidensis MR-1 通过增强氨基酸代谢和脂质生物合成来调节其抗氧化能力，以应对 CPF 胁迫。这项研究为今后高效去除氯化石蜡提供了新的思路。

引用次数: 0

Solar-activated tin oxide photocatalysis for efficient naphthenic acids removal and toxicity reduction in oil sands process water 太阳能激活氧化锡光催化技术用于高效去除油砂工艺用水中的环烷酸并降低其毒性

IF 7.4 2区工程技术 Q1 ENGINEERING, CHEMICAL

Journal of Environmental Chemical Engineering

Pub Date : 2024-09-17 DOI: 10.1016/j.jece.2024.114168

This research studied, for the first time, the effect of activating tin oxide (SnO₂) under simulated solar light for treating real oil sands process water (OSPW). The solar/SnO₂ system effectively eliminated fluorophore organic contaminants, classical naphthenic acids (O₂-NAs), and oxidized NAs (Oxy-NAs) from OSPW. The best experimental conditions to remove over 90 % of O₂-NAs were found to be 0.5 g/L SnO₂ under 8 h of irradiation. HO^• and O₂^•– species identified by electron paramagnetic resonance (EPR) analysis played an important role in the degradation of NAs and other contaminants in real OSPW. The initial toxic effects of untreated OSPW were noticeably reduced after treatment, with a reduction of approximately 50 % in acute toxicity using Microtox® bioassay and over 80 % in the level of bioavailable hydrocarbons. In addition, the process also demonstrated a significant reduction in immunotoxicity as measured using an immune cell bioassay and reduced the toxic effects on Staphylococcus warneri using an adapted bacterial minimal inhibitory concentration (MIC) viability assay. These results suggest that treated OSPW by SnO₂ under solar light has high environmental compatibility, indicating it is safe for reuse in further applications.

本研究首次研究了在模拟太阳光下活化氧化锡（SnO2）处理实际油砂工艺水（OSPW）的效果。太阳能/二氧化锡系统可有效去除 OSPW 中的荧光团有机污染物、经典环烷酸（O2-NAs）和氧化 NA（Oxy-NAs）。研究发现，在 0.5 克/升二氧化硫（SnO2）和 8 小时辐照的最佳实验条件下，O2-NAs 的去除率超过 90%。通过电子顺磁共振（EPR）分析确定的 HO- 和 O2-物种在降解真正的 OSPW 中的 NAs 和其他污染物中发挥了重要作用。未经处理的悬浮固体有机物在经过处理后，最初的毒性效应明显降低，使用 Microtox® 生物测定法测定的急性毒性降低了约 50%，生物可利用的碳氢化合物水平降低了 80%以上。此外，使用免疫细胞生物测定法测量，该工艺还显著降低了免疫毒性，并使用改良的细菌最小抑菌浓度（MIC）活力测定法降低了对 warneri 葡萄球菌的毒性影响。这些结果表明，在太阳光下用二氧化锡处理过的 OSPW 具有很高的环境兼容性，表明它可以安全地再用于其他用途。

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引用次数: 0