Journal of Environmental Chemical Engineering最新文献_第7页

Insights on selective degradation of typical new pollutants in copper-iron oxides Fenton-like systems: Modulation of metal sites and transformation of dominant degradation mechanisms 铜铁氧化物类芬顿体系中典型新污染物选择性降解的见解：金属位点的调节和主要降解机制的转变

IF 7.2 2区工程技术 Q1 ENGINEERING, CHEMICAL

Journal of Environmental Chemical Engineering

Pub Date : 2026-04-01 Epub Date: 2026-01-11 DOI: 10.1016/j.jece.2026.121173

Hao He , Yuyao Li , Yun Liu, Mengke Li, Yuehui Chen, Zhimin You

Copper-iron oxides exhibit distinct Fenton-like degradation properties towards different pollutants, but the underlying mechanisms for these differences remain unclear. To address this knowledge gap, the selective Fenton-like processes were investigated using copper ferrite (CuFe₂O₄) as the catalyst. CuFe₂O₄ selectively degraded ciprofloxacin (CIP), with 50.2 % adsorption and 82.5 % degradation rates, significantly surpassing those of bisphenol A (BPA), 19.7 % and 38.2 %, respectively. Mechanistic studies indicated that the Fenton-like degradation by CuFe₂O₄ were mainly governed by catalyst adsorption capacity and reactive oxygen species production. The selective adsorption of CuFe₂O₄ towards CIP facilitated the electron transfer with H₂O₂. This process and ¹O₂ generated in the system were the primary factor contributing to the selective degradation. Degradation experiments with other pollutants confirmed the proposed mechanism. Additionally, increasing the Cu/Fe ratio in copper-iron oxides enhanced the production of ·OH and ·O₂^-, significantly improving the degradation and mineralization of CIP and BPA (e.g., at a Cu/Fe ratio of 1:0.6, the degradation efficiencies both exceeded 90 % in ultrapure water and reached around 80 % in real water systems), with radical oxidation as the dominant degradation pathway. This study proposes a strategy for selective pollutant degradation by modifying catalyst composition, aiding targeted Fenton-like system development for water treatment.

铜铁氧化物对不同的污染物表现出明显的芬顿样降解特性，但这些差异的潜在机制尚不清楚。为了解决这一知识空白，研究了以铁氧体铜（CuFe2O4）为催化剂的选择性类芬顿过程。CuFe2O4选择性降解环丙沙星（CIP），吸附率为50.2% %，降解率为82.5 %，显著高于双酚A （BPA）的19.7% %和38.2 %。机理研究表明，CuFe2O4的类fenton降解主要受催化剂吸附能力和活性氧生成的影响。CuFe2O4对CIP的选择性吸附促进了与H2O2的电子转移。该过程和系统中产生的1O2是导致选择性降解的主要因素。与其他污染物的降解实验证实了所提出的机制。此外，增加铜铁氧化物中的Cu/Fe比可促进·OH和·O2-的生成，显著提高了CIP和BPA的降解和矿化（例如，当Cu/Fe比为1:6 . 0时，其在超纯水中的降解效率均超过90 %，在真实水系统中降解效率达到80 %左右），自由基氧化是主要的降解途径。本研究提出了一种通过改变催化剂组成来选择性降解污染物的策略，帮助有针对性的类芬顿系统开发用于水处理。

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引用次数: 0

Advances in the circular economy of polystyrene: A critical review of pyrolysis in pilot-scale systems, distillation, and re-polymerization 聚苯乙烯循环经济的进展：中试系统热解、蒸馏和再聚合的评述

IF 7.2 2区工程技术 Q1 ENGINEERING, CHEMICAL

Journal of Environmental Chemical Engineering

Pub Date : 2026-04-01 Epub Date: 2026-02-05 DOI: 10.1016/j.jece.2026.121633

David Royuela, Alberto Veses, Tomás García, Ramón Murillo, Juan Daniel Martínez

The widespread use of plastics in many sectors has resulted in the generation of a significant amount of waste, causing major environmental issues. Polystyrene (PS) is one of the most demanded polymers nowadays. Therefore, a consistent recycling pathway must be established to transition to a circular economy strategy. Pyrolysis of PS can recover styrene monomer (SM) in a liquid fraction that can be used to make new plastics. This replaces the need for fossil-based styrene and creates a circular economy. Although literature on this technology exists at the laboratory scale, advancing it to the pilot scale and beyond is crucial for its near-term deployment. Thus, this review compiles pilot-scale pyrolysis studies of PS and provides the industrial potential of each examined technology. It also emphasizes the need to implement a pyro-oil purification process via distillation, which has been demonstrated to achieve a purity level of over 99 wt% for SM. The potential for producing new PS products with comparable properties to conventional ones using the recovered styrene (r-styrene) in the so-called re-polymerization process is also addressed. Some research gaps, challenges and future perspectives are also outlined. Among others, distillation and re-polimerization on pilot-scales are necessary to be demonstrated to endorse the potential benefits of PS pyrolysis-based recycling. In-depth life cycle assessments (LCAs) using industrially relevant data are also expected in the future. This comprehensive analysis of the PS circular economy cycle through pyrolysis, distillation and re-polymerization is expected to boost the deployment of industrial-scale plants.

塑料在许多行业的广泛使用导致了大量废物的产生，造成了严重的环境问题。聚苯乙烯（PS）是当今需求量最大的聚合物之一。因此，必须建立一致的回收途径，以过渡到循环经济战略。PS热解可回收苯乙烯单体（SM）的液态组分，可用于制造新塑料。这取代了对化石基苯乙烯的需求，创造了循环经济。虽然关于这项技术的文献存在于实验室规模，但将其推进到试点规模甚至更远的地方对于其近期部署至关重要。因此，这篇综述汇编了PS的中试规模热解研究，并提供了每一项研究技术的工业潜力。它还强调了通过蒸馏实施火油净化过程的必要性，该过程已被证明可以达到超过99 wt%的SM纯度水平。在所谓的再聚合过程中，利用回收的苯乙烯（r-苯乙烯）生产具有与传统产品相当性能的新PS产品的潜力也得到了解决。本文还概述了一些研究差距、挑战和未来展望。其中，蒸馏和再聚合在中试规模上是必要的，以证实基于PS热解的回收的潜在效益。使用工业相关数据的深入生命周期评估（lca）也有望在未来实现。通过热解、蒸馏和再聚合对PS循环经济循环进行全面分析，预计将促进工业规模工厂的部署。

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引用次数: 0

Monolithic adsorbent with low pressure drop and high cycling stability enabled by an anchor effect for direct air CO2 capture 整体吸附剂具有低压降和高循环稳定性，通过锚定效应实现直接空气CO2捕获

IF 7.2 2区工程技术 Q1 ENGINEERING, CHEMICAL

Journal of Environmental Chemical Engineering

Pub Date : 2026-04-01 Epub Date: 2026-01-14 DOI: 10.1016/j.jece.2026.121233

Peng Yuan, FeiFan Huang, PeiJun Li, HuiXian Tian, YuChen Zhou, Tao Li

The continuous rise in atmospheric CO₂ is a major driver of global warming, creating the urgent need for negative emission technologies. Direct air capture (DAC) based on solid amine adsorbents has attracted increasing attention due to their balanced performance in capacity, cost, and scalable fabrication. However, DAC operation typically requires high gas flow rates, making low pressure drop and strong support-active phase binding critical to limiting fan energy consumption and ensuring long-term durability. To address this challenge, a four-channel micro-monolithic adsorbent was developed using an alumina ceramic support, polyethyleneimine (PEI) as the active phase, and 3-aminopropyltriethoxysilane (APS) as a coupling agent. The results indicate that APS effectively enhances PEI dispersion and anchoring, enabling a CO₂ adsorption capacity of 0.61 mmol/g, stable performance over 15 adsorption-desorption cycles, and robust tolerance to humidity (0–100 % RH) and temperatures (30–50℃). In addition, the continuous channel architecture results in a low pressure drop of only 4.9–9.8 Pa/cm at gas velocities of 0.53–1.06 m/s, corresponding to a 75.5–83.8 % reduction compared with conventional monoliths. Overall, this work provides a promising micro-monolithic adsorbent platform for scalable and energy-efficient DAC deployment.

大气中二氧化碳的持续上升是全球变暖的主要驱动因素，因此迫切需要负排放技术。基于固体胺吸附剂的直接空气捕获（DAC）由于其在容量、成本和可扩展制造方面的平衡性能而受到越来越多的关注。然而，DAC操作通常需要高气体流速，因此低压降和强支撑有源相结合对于限制风扇能耗和确保长期耐用性至关重要。为了解决这一问题，研究人员开发了一种四通道微单片吸附剂，该吸附剂采用氧化铝陶瓷载体，聚乙烯亚胺（PEI）作为活性相，3-氨基丙基三乙氧基硅烷（APS）作为偶联剂。结果表明，APS有效地增强了PEI的分散和锚定，使CO2吸附量达到0.61 mmol/g，在15个吸附-解吸循环中性能稳定，对湿度（0-100 % RH）和温度（30-50℃）具有较强的耐受性。此外，连续通道结构在气体速度为0.53-1.06 m/s时的低压降仅为4.9-9.8 Pa/cm，与传统单体相比降低了75.5-83.8 %。总的来说，这项工作为可扩展和节能的DAC部署提供了一个有前途的微单片吸附剂平台。

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引用次数: 0

A regenerable thermo-responsive nanofiltration membrane with a molecularly anchored multilayer architecture for enhanced anti-scaling 一种具有分子锚定多层结构的可再生热响应纳滤膜，用于增强抗结垢性

IF 7.2 2区工程技术 Q1 ENGINEERING, CHEMICAL

Journal of Environmental Chemical Engineering

Pub Date : 2026-04-01 Epub Date: 2026-01-15 DOI: 10.1016/j.jece.2026.121264

Chun Wang , Jialin Wei , Zhiyuan Qiao , Jingwen Chu , Feng Xu , Yang Ye , Haolong Xue , Dawei Ji , Jingjing Yan , Changfa Xiao

This study fabricated a thermally self-cleaning nanofiltration membrane through molecular design and multi-scale assembly. PNIPAM-PEI microgels, synthesized by grafting PNIPAM and PEI, were deposited on a PPTA ultrafiltration substrate via layer-by-layer self-assembly. The deposition cycles were systematically optimized, followed by interfacial polymerization to form a polyamide separation layer. Characterization confirmed that five deposition cycles yielded a compact thermo-responsive intermediate layer and resulted in an interpenetrating [PEMs-PNIPAM]-PA structure. The resultant composite NF membrane exhibited excellent separation performance, with rejections of CaCl₂ and MgSO₄ reaching 97.3 % and 98.7 %, respectively, at 25 ℃, along with intelligent thermo-responsive behavior. When heated above the LCST, dehydration and contraction of the PNIPAM core drove the expansion of PA layer pores, activating a “pore expansion” self-cleaning mechanism, with full structural regeneration upon cooling. A 180-hour long-term test verified that high-temperature backwashing at 60 ℃ effectively restored the flux and retention of the fouled membrane. This work offers a new strategy for developing smart nanofiltration membranes with self-cleaning capability.

本研究通过分子设计和多尺度组装制备了热自清洁纳滤膜。将PNIPAM和PEI接枝合成PNIPAM-PEI微凝胶，通过逐层自组装沉积在PPTA超滤基板上。系统地优化了沉积周期，然后进行界面聚合形成聚酰胺分离层。表征证实，五次沉积循环产生了致密的热响应中间层，并产生了互穿[pms - pnipam]-PA结构。复合膜在25℃条件下，CaCl2和MgSO4的去除率分别达到97.3% %和98.7% %，并具有智能的热响应行为。当加热到LCST以上时，PNIPAM芯的脱水和收缩驱动PA层孔隙的膨胀，激活“孔膨胀”自清洁机制，冷却后具有充分的结构再生。180小时的长期试验证明，60℃高温反冲洗能有效恢复污染膜的通量和截留。这项工作为开发具有自清洁能力的智能纳滤膜提供了一种新的策略。

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引用次数: 0

Effect of CO2 aeration and high light intensity on the performance of CO2 absorption-microalgae conversion system CO2曝气和强光对CO2吸收-微藻转化系统性能的影响

IF 7.2 2区工程技术 Q1 ENGINEERING, CHEMICAL

Journal of Environmental Chemical Engineering

Pub Date : 2026-04-01 Epub Date: 2026-01-13 DOI: 10.1016/j.jece.2026.121210

Dantong Wang, Yizhen Wei, Yaoqi Hou, Chunfeng Song

To mitigate global warming, it is urgent to implement carbon emission reduction. CO₂ chemical absorption and microalgae conversion system (CAMC) can achieve low-energy CO₂ capture and effective resource utilization, and has been a sustainable technology to achieve carbon neutrality. However, the carbon fixation capacity and resource utilization efficiency of CAMC system is still needed to be promoted. Therefore, the synergistic treatment of CO₂ aeration (2.5 % CO₂) and high light intensity was applied on Dunaliella in CAMC system, and the effect was comprehensively evaluated. The results showed that this synergistic treatment could effectively promote microalga growth by upregulating the expression of genes related to photosynthesis and carbon metabolism. The optimal biomass concentration was obtained in the group given high light on the third day (3-CO₂+HL group), and it reached 623.0 mg/L which was 1.3-fold higher than control. In addition, the cooperative treatment made the expression of genes relevant to citrate cycle (TCA), glycolysis, and β-carotene bio-synthesis pathway upregulate and effectively induced the value-added compounds accumulation in CAMC system. The concentration of β-carotene was 1.9 times higher than that of the control group. This study provided an approach to enhance carbon fixation capacity and achieve higher resource utilization efficiency in CAMC system.

为减缓全球变暖，实施碳减排迫在眉睫。CO2化学吸收与微藻转化系统（CAMC）可以实现低能耗CO2捕集和有效的资源利用，是实现碳中和的一种可持续技术。但是，CAMC系统的固碳能力和资源利用效率仍有待提高。因此，在CAMC体系中采用CO2曝气（2.5 % CO2）和高光强协同处理杜氏藻，并对效果进行综合评价。结果表明，这种协同处理可以通过上调光合作用和碳代谢相关基因的表达，有效促进微藻的生长。第3天光照组（3-CO2+HL组）的生物量达到最佳浓度，达到623.0 mg/L，是对照的1.3倍。此外，协同处理使柠檬酸循环（citrate cycle， TCA）、糖酵解和β-胡萝卜素生物合成途径相关基因表达上调，有效诱导CAMC系统中增值化合物积累。β-胡萝卜素浓度是对照组的1.9倍。该研究为增强CAMC系统的固碳能力和实现更高的资源利用效率提供了途径。

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引用次数: 0

Tracing antibiotic fate in Chinese sea bass aquaculture: Implications for food safety and sustainability 追踪中国黑鲈养殖中的抗生素命运：对食品安全和可持续性的影响

IF 7.2 2区工程技术 Q1 ENGINEERING, CHEMICAL

Journal of Environmental Chemical Engineering

Pub Date : 2026-04-01 Epub Date: 2026-01-14 DOI: 10.1016/j.jece.2026.121237

Haochang Su , Nanzhen Yi , Xiaoyang Zhang , Xiaojuan Hu , Wujie Xu , Yu Xu , Guoliang Wen , Yucheng Cao

Antibiotics are emerging contaminants. Systematic studies on the source tracing, dissemination and its key drivers of antibiotics in aquaculture, as well as their environmental fate, remain scarce. This study investigated the distribution, accumulation, and environmental fate of antibiotics within sea bass aquaculture systems in China's Sea Bass Capital, with a emphasis on the influence of antibiotic physicochemical properties on their behavior in water, sediment, and biota. Results showed that the molecular weight and octanol-water partition coefficient (Kow) of antibiotics significantly influenced their bioaccumulation in aquaculture organisms, underscoring the pivotal role of these properties in driving the distribution of antibiotics in aquatic environments. Furthermore, solubility and Kow of antibiotics were identified as critical factors affecting their partitioning between aqueous and sediment phases. Suspended solids were identified as a key driver for the spread and distribution of antibiotics within the system. Quinolone antibiotics, due to their prevalence and potential environmental impact, have been identified as key indicator antibiotics for priority management and control. Over half of the antibiotic remained in the sediment, with 30 % naturally degraded. This study elucidates the environmental trajectory of antibiotics, shedding light on their potential threats to aquatic ecosystems and food safety. It underscores the pivotal role of prudent waste management practices for antibiotics in aquaculture. Our findings can guide the formulation of specific mitigation strategies and enrich the ongoing dialogue on environmental sustainability and food safety.

抗生素是新兴的污染物。关于水产养殖中抗生素的来源追踪、传播及其主要驱动因素及其环境命运的系统研究仍然很少。本研究调查了中国黑鲈之都养殖系统中抗生素的分布、积累和环境命运，重点研究了抗生素理化性质对其在水、沉积物和生物群中的行为的影响。结果表明，抗生素的分子量和辛醇-水分配系数（辛醇-水分配系数，Kow）显著影响其在水产养殖生物体内的生物蓄积，这些特性在驱动抗生素在水生环境中的分布中起着关键作用。此外，抗生素的溶解度和溶解度是影响其在水相和沉积物相之间分配的关键因素。悬浮物被确定为系统内抗生素传播和分布的关键驱动因素。喹诺酮类抗生素由于其普遍存在和潜在的环境影响，已被确定为重点管理和控制的关键指标抗生素。超过一半的抗生素留在沉积物中，30% %自然降解。本研究阐明了抗生素的环境轨迹，揭示了抗生素对水生生态系统和食品安全的潜在威胁。它强调了水产养殖中谨慎的抗生素废物管理做法的关键作用。我们的研究结果可以指导制定具体的缓解战略，并丰富正在进行的关于环境可持续性和食品安全的对话。

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引用次数: 0

Multivalent iron in waste steel rust serves as efficient electrocatalyst for flow-through removal of tetracyclines in wastewater 废钢铁锈中的多价铁是废水中四环素的高效电催化剂

IF 7.2 2区工程技术 Q1 ENGINEERING, CHEMICAL

Journal of Environmental Chemical Engineering

Pub Date : 2026-04-01 Epub Date: 2026-01-13 DOI: 10.1016/j.jece.2026.121201

Yijia Ran , Kehan Yang , Zhihao He , Xinrong Wang , Huiqin Chen , Chengyi Huang , Junzhuo Cai

Tetracycline antibiotics (TCs) pose escalating environmental threats due to their persistence and resistance gene dissemination. Herein, this research pioneered a waste-derived structured electrode by immobilizing polycrystalline waste steel rust (WSR) on honeycomb activated carbon (HAC@WSR) as a third-electrode for flow-through TCs removal. Under the optimal conditions of cell voltage 10 V, initial solution pH 7.5 ± 0.2, and flow rate 5 mL min⁻¹, the system achieved a removal rate (k_obs) of 0.055 min⁻¹, approximately double that of commercial Fe powder, FeO, or Fe₃O₄ with k_obs of 0.025–0.032 min⁻¹. Integrated analyses reveal dual enhancement mechanisms: (1) Electric-field-promoted adsorption via WSR-mediated chemisorption (HAC@WSR exhibits an equilibrium adsorption capacity of 118.46 mg g⁻¹ for tetracycline hydrochloride (TCH), 2.02 times higher than static adsorption), where adsorbed TCs self-optimize electrode activity; (2) Multivalent iron-triggered generation of diverse radicals (•OH, •O₂^-, H*) at the electrode surface, accelerating ring-opening mineralisation with negligible aquatic toxicity in final products. Under continuous operation, the three-dimensional electrochemical system (3DES) achieved about 95 % removal for TCs, with effluent TCs concentrations remained below 0.1 mg L⁻¹. Compared with the two-dimensional electrochemical system (2DES) without HAC@WSR, the 3DES exhibited a 40.6 % enhancement in TCH removal efficiency. Under 360 min of continuous flow operation, the 3DES maintained a removal efficiency of > 90 % for TCs with negligible iron leaching, while the 2DES had a breakdown. Additionally, the 3DES significantly improving wastewater’s biodegradability (BOD₅/COD increased from 0.15 to 0.44), enabling practical integration as a biological pretreatment. This work establishes a "waste-to-clean-water" paradigm aligned with circular economy principles, simultaneously addressing metal waste recycling and antibiotic contamination.

四环素类抗生素由于其持久性和耐药基因的传播，对环境的威胁日益严重。在此，本研究通过将多晶废钢锈病（WSR）固定在蜂窝活性炭（HAC@WSR）上作为第三电极，开创了一种废物衍生的结构电极，用于流动TCs去除。在电池电压为10 V，初始溶液pH为7.5 ± 0.2，流速为5 mL min−1的最佳条件下，系统的去除率（kobs）为0.055 min−1，约为商业铁粉，FeO或Fe3O4的两倍，kobs为0.025-0.032 min−1。综合分析揭示了双重增强机制：(1)电场促进了wsr介导的化学吸附（HAC@WSR对盐酸四环素（TCH）的平衡吸附容量为118.46 mg g−1，比静态吸附高2.02倍），其中吸附的tc自优化电极活性；(2)多价铁在电极表面触发多种自由基（•OH，•O2-, H*）的产生，加速开环矿化，最终产物的水生毒性可忽略不计。在连续运行下，三维电化学系统（3DES）对TCs的去除率达到95% %左右，出水TCs浓度保持在0.1 mg L−1以下。与不含HAC@WSR的二维电化学体系（2DES）相比，3DES对TCH的去除率提高了40.6 %。在360 min的连续流运行下，3DES对TCs的去除率保持在>； 90 %，铁浸出可以忽略不计，而2DES则发生击穿。此外，3DES显著提高了废水的可生化性（BOD5/COD从0.15提高到0.44），可以作为生物预处理进行实际整合。这项工作建立了一个符合循环经济原则的“废物到清洁水”模式，同时解决了金属废物回收和抗生素污染问题。

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引用次数: 0

Integrated enrichment-photocatalytic platform based on exfoliated vermiculite: Construction of CdS/PTI S-scheme heterojunction and mechanism of photocorrosion resistance 基于脱落蛭石的集成富集-光催化平台：CdS/PTI S-scheme异质结的构建及耐光腐蚀机理

IF 7.2 2区工程技术 Q1 ENGINEERING, CHEMICAL

Journal of Environmental Chemical Engineering

Pub Date : 2026-04-01 Epub Date: 2026-01-13 DOI: 10.1016/j.jece.2026.121205

Ning Zhang , Qingyang Xu , Ke Cui , Yi Wang , Xue Yang , Hui Zhao , Huaizhi Shao , Dongping Tao , Yu Zhang , Qian Zhang

In this study, a ternary eVT/CdS/PTI composite was successfully prepared by constructing an S-scheme heterojunction between CdS and PTI and supporting it on exfoliated vermiculite (eVT). This integrated system achieves rapid degradation of TC enriched from aqueous solution while mitigating the photocorrosion susceptibility of CdS during photocatalytic processes. The results demonstrate that the eVT/CdS/PTI composite exhibits excellent adsorption capacity and photocatalytic activity, with a maximum TC adsorption capacity of 23 mg/g and a degradation efficiency of 99.2 % within 15 min under visible light irradiation. After three cycles, the degradation efficiency remained above 90 %, indicating high stability. Characterization and computational analyses reveal that the successful construction of the S-scheme heterojunction establishes an internal electric field at the CdS/PTI interface, which effectively facilitates the separation and migration of photogenerated charge carriers and suppresses the photocorrosion of CdS. This work developed a novel eVT/CdS/PTI composite with synergistic adsorption and photocatalytic functions. By employing an S-scheme heterojunction mechanism, the material significantly enhances photocatalytic stability and performance, offering a new strategy and theoretical foundation for designing efficient and stable photocatalysts for environmental pollution remediation.

本研究通过构建CdS与PTI之间的s型异质结，并将其支撑在脱落蛭石（eVT）上，成功制备了三元eVT/CdS/PTI复合材料。该集成系统实现了从水溶液中富集的TC的快速降解，同时减轻了cd在光催化过程中的光腐蚀敏感性。结果表明，eVT/CdS/PTI复合材料具有优异的吸附能力和光催化活性，在可见光照射下，最大TC吸附量为23 mg/g，在15 min内降解效率为99.2 %。经过3次循环后，降解效率保持在90 %以上，稳定性好。表征和计算分析表明，s型异质结的成功构建在CdS/PTI界面处建立了一个内部电场，有效地促进了光生载流子的分离和迁移，抑制了CdS的光腐蚀。本研究开发了一种具有协同吸附和光催化功能的新型eVT/CdS/PTI复合材料。该材料利用s型异质结机制，显著提高了光催化稳定性和性能，为设计高效稳定的光催化剂用于环境污染修复提供了新的策略和理论基础。

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引用次数: 0

Production of glycerol butyl acetal as a biofuel additive via acetalization over a sulfonated solid acid carbon catalyst derived from bamboo charcoal 竹炭磺化固体酸碳催化剂上缩醛化生产生物燃料添加剂甘油丁缩醛

IF 7.2 2区工程技术 Q1 ENGINEERING, CHEMICAL

Journal of Environmental Chemical Engineering

Pub Date : 2026-04-01 Epub Date: 2026-01-13 DOI: 10.1016/j.jece.2026.121195

Thidarat Kunawong , Koson Saoron , Titiporn Wattanakul , Jenjira Phuriragpitikhon , Artit Ausavasukhi

A series of highly efficient and selective solid acid carbon catalysts (BBxS4) were successfully synthesized from renewable bamboo charcoal (BB) via a sulfonation process using varying concentrations of sulfuric acid (x = 3, 6, and 12 wt%) over a fixed duration of 4 h. These heterogeneous catalysts were subsequently tested in the acetalization of glycerol with butyraldehyde to synthesize glycerol butyl acetals (GBAs), a promising, high-value oxygenate fuel additive designed for effective PM2.5 emission reduction. The BB6S4 catalyst exhibited optimal performance, achieving high glycerol conversion and superior regioselectivity towards the kinetically favored 4-hydroxymethyl-2-propyl-1,3-dioxolane (5-GBA, a 5-membered ring product), consistently maintaining selectivity around 90 %. Furthermore, the BB6S4 catalyst demonstrated robust reusability over four successive cycles. Although conversion slightly decreased from 80.95 % to 73.19 % across the four cycles, the excellent regioselectivity was almost perfectly preserved (88.26–90.02 % 5-GBA). Subsequent testing demonstrated that blending 5.0 vol% GBA with B7 diesel fuel resulted in a significant 16.94 % reduction in particulate matter (PM) and a desirable 5.34 % decrease in nitrogen oxides (NO_x) emissions, confirming GBA’s dual benefit as an effective emission control agent.

以可再生竹炭（BB）为原料，采用不同浓度硫酸（x = 3、6和12 wt%）、固定时间为4 h的磺化工艺，成功合成了一系列高效选择性固体酸碳催化剂（BBxS4）。这些多相催化剂随后在甘油与丁醛的缩醛化反应中进行了测试，以合成甘油丁醛缩醛（GBAs），这是一种有前途的高价值含氧燃料添加剂，旨在有效减少PM2.5的排放。BB6S4催化剂表现出最佳性能，对动力学上有利的4-羟甲基-2-丙基-1,3-二氧唑烷（5-GBA，一种5元环产物）具有较高的甘油转化率和优越的区域选择性，始终保持90% %左右的选择性。此外，BB6S4催化剂在连续四个循环中表现出强大的可重复使用性。虽然转化率从80.95 %略微下降到73.19 %，但优异的区域选择性几乎完全保留（88.26-90.02 % 5-GBA）。随后的测试表明，将5.0 vol%的GBA与B7柴油混合后，颗粒物（PM）显著减少16.94% %，氮氧化物（NOx）排放量减少5.34% %，证实了GBA作为一种有效的排放控制剂的双重好处。

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引用次数: 0

A pilot-scale certification for copper recovery from waste printed circuit boards by NH3-NH4Cl-CuSO4 slurry electrolysis: perspective but challenge NH3-NH4Cl-CuSO4浆液电解从废弃印刷电路板中回收铜的中试认证：展望但挑战

IF 7.2 2区工程技术 Q1 ENGINEERING, CHEMICAL

Journal of Environmental Chemical Engineering

Pub Date : 2026-04-01 Epub Date: 2026-01-10 DOI: 10.1016/j.jece.2026.121157

Qian Liang , Ling Hu , Xiangfei Zeng , Jinchuan Qin , Yunhui Han , Huimin Yang , Huan Li , Xingyu Luo , Shuyuan Chen , Shaoqin Chen , Jiqin Wang , Jiancheng Shu , Xiaogang Li , Hongyan Yan , Mengjun Chen

Slurry electrolysis is a promising technology for the sustainable recovery of copper from waste printed circuit boards (WPCBs). This study presents the first pilot-scale (1 m³) demonstration of the NH₃-NH₄Cl-CuSO₄ process, confirming its robust technical feasibility. Across all 15 operational cycles, the process consistently achieved a copper purity > 99.99 %, a recovery rate > 99 %, and a current efficiency > 85 %, all while reusing the same electrolyte. Economically and environmentally, the process demonstrates clear advantages, yielding a net profit of $5623.97 and reducing carbon emissions by 19,384.58 kg CO₂eq per ton of copper recovered—markedly outperforming both laboratory-scale benchmarks and conventional technologies. The work also systematically identifies and analyzes key scale-up challenges critical to process safety and stability. These include slurry inhomogeneity from WPCB powder, insufficient flow-field design, membrane-induced concentration polarization, uneven voltage and temperature distribution due to electrode design, and potential ammonia volatilization risks. To mitigate these, targeted engineering solutions are proposed. Furthermore, we emphasize the necessity of multi-physics simulations that couple particle flow, electrochemistry, and mass transfer to guide future industrial optimization. By offering both crucial technological validation and actionable engineering insights, this study advances the sustainable recovery of critical metals toward industrial application.

浆液电解是一种很有前途的从废弃印刷电路板（wpcb）中可持续回收铜的技术。本研究首次提出了NH3-NH4Cl-CuSO4工艺的中试规模（1 m3）演示，证实了其强大的技术可行性。在所有15个操作循环中，该工艺始终保持铜纯度>； 99.99 %，回收率>； 99 %，电流效率>； 85 %，同时重复使用相同的电解质。在经济和环境方面，该工艺具有明显的优势，产生5623.97美元的净利润，每吨铜回收可减少19384.58 千克二氧化碳当量的碳排放，明显优于实验室规模的基准和传统技术。这项工作还系统地识别和分析了对工艺安全和稳定至关重要的关键放大挑战。这些问题包括WPCB粉末的浆料不均匀性、流场设计不足、膜诱导的浓度极化、电极设计导致的电压和温度分布不均匀以及潜在的氨挥发风险。为了缓解这些问题，提出了有针对性的工程解决方案。此外，我们强调了将粒子流、电化学和传质耦合在一起的多物理场模拟的必要性，以指导未来的工业优化。通过提供关键的技术验证和可操作的工程见解，本研究将关键金属的可持续回收推向工业应用。

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引用次数: 0