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Assessing the undesired impacts on water sustainability from climate change mitigation technologies in fossil-based power generation 评估化石燃料发电中的气候变化减缓技术对水资源可持续性的不良影响
IF 5 4区 环境科学与生态学 Q3 ENGINEERING, ENVIRONMENTAL Pub Date : 2024-07-12 DOI: 10.1039/d4ew00122b
Prebantha Moodley, Kevin Harding, Thomas Alan Adams
This work investigates the water impact of carbon capture technologies employed in coal and natural gas power generation, viz. integrated gasification combined cycle, oxy-fuel combustion, solid oxide fuel cells and post-combustion solvent-based. The Water Impact per CO2 Avoided (WICa) metric was developed to understand the tradeoff between water usage and global warming potential, and additionally as a decision-making tool. It relates the impact on available water resources to greenhouse gas reduction over the cradle-to-plant-exit lifecycle by leveraging existing metrics, including the Water Impact Index (WII), water withdrawal, water consumption, water quality, and Water Scarcity Index (WSI). The results show that some carbon capture technologies increase the overall water usage of power generation plants, thereby increasing the water impact per CO2 avoided. Solid oxide fuel cells and oxy-fuel technology, though not mature in comparison to post-combustion, have the least water impact per CO2 avoided. Furthermore, water withdrawal and consumption are shown to trend with the WII in specific scenarios, implying that, in the absence of water quality and WSI data, the metric’s use as a stakeholder decision-making tool remains. The potential to reduce global warming via carbon capture technologies in the power generation industry can create additional water resource challenges for countries if not carefully considered.
这项研究调查了煤炭和天然气发电中采用的碳捕集技术对水的影响,即综合气化联合循环、富氧燃烧、固体氧化物燃料电池和燃烧后溶剂型。为了解用水量与全球升温潜能值之间的权衡,以及作为决策工具,开发了每避免 CO2 对水的影响(WICa)指标。该指标利用现有指标,包括水影响指数(WII)、取水量、耗水量、水质和缺水指数(WSI),将对可用水资源的影响与在从摇篮到工厂到退出的生命周期内减少温室气体排放联系起来。结果表明,一些碳捕集技术会增加发电厂的总体用水量,从而增加了每避免 1 吨二氧化碳对水的影响。与后燃烧技术相比,固体氧化物燃料电池和全氧燃烧技术虽然并不成熟,但每避免 1 CO2 对水的影响最小。此外,在特定情景下,取水量和耗水量与 WII 呈趋势,这意味着在缺乏水质和 WSI 数据的情况下,该指标仍可用作利益相关者的决策工具。如果不仔细考虑发电行业通过碳捕集技术减少全球变暖的潜力,可能会给各国带来额外的水资源挑战。
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引用次数: 0
Efficacy and mechanism of the artificial sweetener saccharin degradation by thermally activated persulfate in aquatic environments 热激活过硫酸盐在水生环境中降解人工甜味剂糖精的功效和机制
IF 5 4区 环境科学与生态学 Q3 ENGINEERING, ENVIRONMENTAL Pub Date : 2024-07-11 DOI: 10.1039/d4ew00357h
Webber Wei-Po Lai, Chia-Ming Chang
Artificial sweeteners, which potentially pose threats to ecosystems, are prevalent emerging contaminants in aquatic environments. This study explored the efficacy and mechanism underlying the degradation of saccharin by thermally activated persulfate treatment (thermal/persulfate) for the first time. Saccharin degradation followed pseudo-first-order kinetics, with a kobs value of 0.023 min−1 under the following conditions: [saccharin]0 = 5 mg L−1, [persulfate]0 = 100 mg L−1, temperature = 70 °C and solution pH = 7.0. Optimal saccharin degradation occurred under neutral and weakly acidic pH conditions (pH 7 and 5), and the calculated apparent activation energy of saccharin was 113.3 kJ mol−1. The results from the scavenger experiments and electron paramagnetic resonance identification revealed that SO4˙ and ·OH were the predominant radical species involved in saccharin degradation, with ·OH likely playing the major role. HCO3, NO3, and dissolved organic matter competed with saccharin for free radicals, decreasing the saccharin degradation rate; however, Cl had a positive effect. Saccharin degradation involved monohydroxylation and dihydroxylation and produced TP1 and TP2, respectively. During treatment, 35% TOC reduction was achieved, and the Microtox® toxicity initially increased and then decreased, suggesting that saccharin and its transformation byproducts undergo mineralization and detoxification. The saccharin degradation rate was lower in actual water matrices than in deionized water. In conclusion, this work comprehensively investigated the degradation of saccharin by thermally activated persulfate treatment for future applications in water/wastewater treatment.
人工甜味剂可能对生态系统构成威胁,是水生环境中普遍存在的新污染物。本研究首次探讨了热激活过硫酸盐处理(热/过硫酸盐)降解糖精的功效和机理。在以下条件下,糖精降解遵循伪一阶动力学,kobs 值为 0.023 min-1:[糖精]0 = 5 mg L-1,[过硫酸盐]0 = 100 mg L-1,温度 = 70 °C,溶液 pH = 7.0。最佳的糖精降解发生在中性和弱酸性 pH 条件下(pH 值为 7 和 5),计算得出的糖精表观活化能为 113.3 kJ mol-1。清除剂实验和电子顺磁共振鉴定的结果表明,SO4˙- 和 -OH 是参与糖精降解的主要自由基物种,其中 -OH 可能起主要作用。HCO3-、NO3-和溶解的有机物与糖精竞争自由基,降低了糖精的降解速率;然而,Cl-具有积极的作用。糖精降解包括单羟基化和二羟基化,并分别产生 TP1 和 TP2。在处理过程中,TOC 降低了 35%,Microtox® 的毒性先增加后降低,这表明糖精及其转化副产物发生了矿化和解毒作用。糖精在实际水基质中的降解率低于去离子水。总之,这项工作全面研究了热活化过硫酸盐处理对糖精的降解,为今后在水/废水处理中的应用提供了参考。
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引用次数: 0
Efficient and effective removal of toluene from aqueous solution using MIL-100(Fe) 使用 MIL-100(Fe)高效去除水溶液中的甲苯
IF 5 4区 环境科学与生态学 Q3 ENGINEERING, ENVIRONMENTAL Pub Date : 2024-07-10 DOI: 10.1039/d4ew00503a
Catalina V. Flores, Juan L. Obeso, Herlys Viltres Cobas, Ricardo A. Peralta, Ilich A. Ibarra, Carolina Leyva
MIL-100(Fe) was employed for the remediation of toluene-contaminated water. MIL-100(Fe) samples synthesised for this work exhibit high thermal (300°C) and chemical (pH range 2-10) stability. Adsorption kinetics and isotherms were fitted to the Elovich and Temkin models. The pH of the aqueous sample containing Toluene was found to impact the adsorption capacity of MIL-100(Fe) through modulation of the MOF ζ potential. As a result, we concluded that MIL-100(Fe) is most effective at adsorbing toluene in the 6-10 pH range, a finding that underscores its potential in water treatment. The maximum Langmuir adsorption capacity of 318.48 mg g-1 was determined. MIL-100(Fe) showed excellent adsorption-desorption performance and stability; hence, it can be used repeatedly without loss of toluene absorption capacity. FT-IR spectra suggest that π-π interactions serve a crucial role during toluene adsorption, further confirming the effectiveness of MIL-100 (Fe) in water treatment.
MIL-100(Fe) 被用于甲苯污染水的修复。为这项工作合成的 MIL-100(Fe)样品具有很高的热稳定性(300°C)和化学稳定性(pH 值范围 2-10)。吸附动力学和等温线均符合 Elovich 和 Temkin 模型。通过调节 MOF ζ 电位,发现含甲苯水样的 pH 值会影响 MIL-100(Fe)的吸附能力。因此,我们得出结论,MIL-100(Fe) 在 pH 值为 6-10 的范围内对甲苯的吸附效果最好,这一发现突出了它在水处理方面的潜力。测定的最大朗缪尔吸附容量为 318.48 mg g-1。MIL-100(Fe) 具有出色的吸附-解吸性能和稳定性,因此可反复使用而不会损失甲苯吸附能力。傅立叶变换红外光谱表明,π-π 相互作用在甲苯吸附过程中起着关键作用,这进一步证实了 MIL-100 (Fe) 在水处理方面的有效性。
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引用次数: 0
Versatile, Flexible Rice Starch-Graphene Oxide Bio-nanocomposites 多功能柔性大米淀粉-氧化石墨烯生物纳米复合材料
IF 5 4区 环境科学与生态学 Q3 ENGINEERING, ENVIRONMENTAL Pub Date : 2024-07-10 DOI: 10.1039/d4ew00419a
Prathmesh Bhadane, Abhijit Mishra
In light of the pressing challenge of global plastic and water pollution, this study seeks a singular solution by exploring the remarkable potential of rice starch (RS) – graphene oxide (GO) bio-nanocomposite films. RS-GO composite films were prepared with varying GO concentrations. As the GO weight percentage was increased from 0 wt.% to 1 wt.% of starch, the ultimate tensile strength of the composite was seen to increase by 438%, whereas a marginal decrease of 29% in elongation was observed. Reinforcement of GO into the starch film also helped to enhance melting temperature because of the strong hydrogen bond formation between RS and GO sheets. Apart from the enhanced mechanical and thermal stability of the prepared composite films, they also exhibited antibacterial properties against both Gram-positive and Gram-negative bacterial strains, encouraging their use in food packaging and storage industries. In addition, the use of RS-GO biocomposite as an adsorbent material for lead removal from wastewater was also explored. As the GO concentration was increased in the composite film, the Pb(II) ion removal efficiency (RE) also increased, with a maximum RE of 99% observed for 5 wt.% GO film from 10 ppm Pb(II) water solution. In conclusion, the ability of RS-GO bio-nanocomposite to address plastic and water pollution adds to their value as eco-friendly materials.
鉴于全球塑料和水污染的紧迫挑战,本研究通过探索大米淀粉(RS)-氧化石墨烯(GO)生物纳米复合薄膜的巨大潜力,寻求一种独特的解决方案。研究人员使用不同浓度的 GO 制备了 RS-GO 复合薄膜。随着 GO 在淀粉中的重量百分比从 0 wt.% 增加到 1 wt.%,复合材料的极限拉伸强度增加了 438%,而伸长率则略微下降了 29%。在淀粉膜中添加 GO 还有助于提高熔化温度,因为 RS 和 GO 片之间形成了牢固的氢键。所制备的复合薄膜除了具有更高的机械稳定性和热稳定性外,还对革兰氏阳性和革兰氏阴性细菌菌株具有抗菌性能,因此可用于食品包装和储存行业。此外,还探索了 RS-GO 生物复合材料作为吸附材料用于去除废水中的铅。随着复合薄膜中 GO 浓度的增加,Pb(II) 离子的去除率(RE)也随之增加,从 10 ppm Pb(II) 水溶液中去除 5 wt.% GO 薄膜的 RE 最高可达 99%。总之,RS-GO 生物纳米复合材料解决塑料和水污染问题的能力增加了其作为生态友好材料的价值。
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引用次数: 0
Enhanced removal of perfluorooctanoic acid by VUV/sulfite/iodide: Efficiencies, influencing factors and decomposition mechanism 紫外线/亚硫酸盐/碘化物增强了对全氟辛酸的去除:效率、影响因素和分解机制
IF 5 4区 环境科学与生态学 Q3 ENGINEERING, ENVIRONMENTAL Pub Date : 2024-07-08 DOI: 10.1039/d4ew00198b
Hong Liu, Ruibao Jia, Xiaodong Xin, Weilin Guo, Wei Li, Mingquan Wang, Shaohua Sun
Perfluoroalkyl acids (PFOA) have been referred to as “forever chemicals”, and are toxic and bioaccumulative. Previous studies indicated that the defluorination of PFOA is incomplete by various advanced reductive processes. In this study, we proposed to combine sulfite (SO32-) with iodide (I-) for advanced reduction processes of PFOA under vacuum ultraviolet (VUV) radiation. The degradation and defluorination ratios of PFOA reached 100% within 30 min, and 99.2% within 6 h, respectively. Hydrated electron (eaq-) and VUV photolysis occupied major contributors to PFOA removal. The VUV/SO32-/I- was superior to the UV/SO32-/I- for PFOA decomposition with a synergistic factor of 1.36 and eaq- of higher yield. The optimal dosage of I- has been reduced by half owing to a stronger absorption coefficient under VUV radiation. HCO3-, Cu2+, and humic acid presented inhibition on the decomposition. Fe3+ and SO42- had slight and negligible effects on the performance of the VUV/SO32-/I- process, respectively. We attained the most active sites of nucleophilic attack utilizing Fukui function indices of PFOA anion by density functional theory (DFT) calculations. C7 polyfluorinated carboxylate esters, short-chain hydrogen-containing, and sulfonated intermediates were identified in PFOA degradation for the first time in the study. This study provides a feasible approach to environmental remediation of PFOA.
全氟烷基酸(PFOA)被称为 "永远的化学品",具有毒性和生物累积性。以往的研究表明,通过各种先进的还原工艺,PFOA 的脱氟是不完全的。本研究提出将亚硫酸盐(SO32-)和碘化物(I-)结合起来,在真空紫外线(VUV)辐射下进行全氟辛烷磺酸的高级还原过程。在30分钟内,PFOA的降解率和脱氟率分别达到100%和99.2%。水合电子(eaq-)和 VUV 光解是去除 PFOA 的主要因素。紫外/SO32-/I-对 PFOA 的分解效果优于紫外/SO32-/I-,协同系数为 1.36,eaq-的产量更高。由于紫外线辐射下的吸收系数更强,I-的最佳用量减少了一半。HCO3-、Cu2+ 和腐植酸对分解有抑制作用。Fe3+和SO42-对紫外/SO32-/I-过程的性能分别有轻微影响和可忽略不计的影响。通过密度泛函理论(DFT)计算,我们利用全氟辛酸阴离子的福井函数指数找到了最活跃的亲核攻击位点。研究首次发现了 C7 多氟羧酸酯、含氢短链和磺化中间体在 PFOA 降解过程中的作用。该研究为全氟辛酸的环境修复提供了一种可行的方法。
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引用次数: 0
The application of water bamboo (Zizania latifolia) husk-derived biochar for copper-contaminated irrigation water treatment and soil amendment 水竹(Zizania latifolia)壳衍生生物炭在铜污染灌溉水处理和土壤改良中的应用
IF 5 4区 环境科学与生态学 Q3 ENGINEERING, ENVIRONMENTAL Pub Date : 2024-07-08 DOI: 10.1039/d4ew00342j
Thi-Manh Nguyen, Hung-Hsiang Chen, Chih-Chi Yang, Yung-Pin Tsai, Ming-Yu Kuo, Yi-Tang Liao, Yu-Chen Chang, Ku-Fan Chen
In Taiwan, farmlands are polluted with metals mainly caused by irrigation water and sediments in irrigation channels. Copper (Cu) presents a major challenge in Taiwan's agricultural lands. This study investigates the potential of utilizing water bamboo (Zizania latifolia) husk-derived biochar (WBC) for the treatment of copper-contaminated irrigation water and soil amendment. BET-SSA for WBC that is produced at 600oC is 192 m2/g and pore volume is 0.174 cc/g. The FTIR spectrum of WBC exhibits several functional groups, such as phosphate, carboxylate (-COO), or aromatic (C=C) that can contribute to biochar alkalinity. The point of zero charge (pHPZC) of WBC is determined to be 2.7. The optimum adsorption of copper by WBC occurs at pH 5. Copper adsorption by WBC fits well with pseudo-second-order kinetics and Langmuir isotherm, which demonstrates that chemisorption and monolayer adsorption are the dominant mechanisms for copper removal. The maximum Cu2+ adsorption capacity of WBC is 144.9 mg/g, which is much higher than those of many existing reports. The addition of 1 to 5% (wt/wt) WBC neutralizes acidic soil pH effectively, making it suitable for water bamboo cultivation.
在台湾,农田受到金属污染的主要原因是灌溉水和灌溉渠道中的沉积物。铜(Cu)是台湾农田面临的一大挑战。本研究调查了利用水竹(Zizania latifolia)壳衍生生物炭(WBC)处理铜污染灌溉水和土壤改良的潜力。在 600oC 下生成的水竹壳生物炭的 BET-SSA 值为 192 m2/g,孔隙度为 0.174 cc/g。WBC 的傅立叶变换红外光谱显示出多个官能团,如磷酸盐、羧酸盐 (-COO) 或芳香族 (C=C),这些官能团可促进生物炭的碱性。经测定,WBC 的零电荷点 (pHPZC) 为 2.7。WBC 对铜的最佳吸附发生在 pH 值为 5 时。 WBC 对铜的吸附与假二阶动力学和 Langmuir 等温线非常吻合,这表明化学吸附和单层吸附是铜去除的主要机制。WBC 对 Cu2+ 的最大吸附容量为 144.9 mg/g,远高于现有的许多报道。添加 1%至 5%(重量/重量)的 WBC 能有效中和酸性土壤的 pH 值,因此适合水竹栽培。
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引用次数: 0
Hydrothermal metal recovery of metal-contaminated wastewater with forest residue: A zero waste discharge process 利用森林残渣对受金属污染的废水进行水热金属回收:零废物排放工艺
IF 5 4区 环境科学与生态学 Q3 ENGINEERING, ENVIRONMENTAL Pub Date : 2024-07-05 DOI: 10.1039/d4ew00229f
Pankaj Kumar, Sivamohan N. Reddy
Hydrothermal technology emerges as a cutting-edge approach for utilizing liquid effluent and waste biomass into valuable products. The simulated zinc metal effluent (Zn-1758 ppm) and real zinc electroplating effluent (Zn-765 ppm and Cr-506 ppm in major concentration) with pine needles as an adsorbent, aiming for zero waste discharge were performed. A comprehensive study was done to analyze the impact of several critical parameters, such as temperature (100-600 °C), time (0-60 min), and biomass to a simulated metal effluent ratio (1:4 to 1:10), on metal recovery from metal-contaminated wastewater. The metal ions in the effluent are bound to the carbon matrix and reduced to lower valence metal oxide or pure metal during the hydrothermal process, later recovered as a metal-carbon composite. Parameters such as temperature and time positively impact the recovery of metal ions from wastewater. At operating conditions of 400 °C, 30 minutes, and a biomass-to-effluent ratio of 1:100 utilizing pine needles infused real zinc electroplating effluent, a recovery exceeding 99.9 % of metal ions has been attained, concurrently yielding a metal loading of 303.4 mg.g-1 of the carbon composite. At similar operating conditions with pine needles and simulated zinc metal effluent, the maximum metal loading of 623.3 mg.g-1 of carbon composite was achieved. The generated carbon composite exhibits nanometals with quasi-spherical morphology and a significant surface area (max: 221.1 m2.g-1), rendering it suitable for fabricating sensors and energy storage devices.
水热技术是将液体废水和废弃生物质转化为有价值产品的前沿方法。以松针为吸附剂,模拟锌金属废水(Zn-1758 ppm)和实际电镀锌废水(主要浓度为 Zn-765 ppm 和 Cr-506 ppm),旨在实现零废物排放。综合研究分析了温度(100-600 °C)、时间(0-60 分钟)和生物量与模拟金属废水的比例(1:4 至 1:10)等几个关键参数对从金属污染废水中回收金属的影响。废水中的金属离子与碳基质结合,并在水热过程中还原成低价金属氧化物或纯金属,随后以金属碳复合材料的形式回收。温度和时间等参数对从废水中回收金属离子有积极影响。在 400 °C、30 分钟、生物质与废水比例为 1:100 的操作条件下,利用松针注入真正的电镀锌废水,金属离子的回收率超过 99.9%,同时碳复合材料的金属负荷为 303.4 mg.g-1。在使用松针和模拟锌金属废水的类似操作条件下,碳复合材料的最大金属负荷为 623.3 mg.g-1。生成的碳复合材料呈现出准球形的纳米形态和显著的表面积(最大:221.1 m2.g-1),使其适用于制造传感器和储能装置。
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引用次数: 0
Beyond Campus Borders: Wastewater Surveillance Sheds Light on University COVID-19 Interventions and their Community Impact 超越校园边界:废水监测揭示大学 COVID-19 干预措施及其对社区的影响
IF 5 4区 环境科学与生态学 Q3 ENGINEERING, ENVIRONMENTAL Pub Date : 2024-07-05 DOI: 10.1039/d4ew00168k
David G Lisboa, Devrim Kaya, Michael Harry, Casey A. Kanalos, Gabriel Davis, Oumaima Hachimi, Shana Jaaf, David Mickle, Dana Alegre, Katherine Carter, Steven Carrell, Mark Dasenko, Nathan Davidson, Justin Elser, Matthew Geniza, Anne-Marie Girard, Brent Kronmiller, Matthew Peterson, Elizabeth Zepeda, Christine Kelly, Tyler Radniecki
The evaluation of COVID-19 policy effectiveness on university campuses, particularly in mitigating spread to neighboring cities (i.e., "campus spill-over"), is challenging due to asymptomatic transmission, biases in case reporting, and spatial case reporting limitations. Wastewater surveillance offers a less biased and more spatially precise alternative to conventional clinical surveillance, thus providing reliable data for university COVID-19 policy evaluation. Wastewater surveillance data spanning the academic terms from Fall 2020 through Spring 2022 was used to evaluate the impact of university COVID-19 policies. During the campus closure to external visitors, campus viral concentrations and variant compositions were dissimilar from those of the host and neighboring cities (MAPE = 0.25 + 0.14; Bray-Curtis = 0.68 + 0.1, respectively), indicating relative isolation of the campus from its surroundings. Upon the campus reopening to visitors, the viral concentrations and variant compositions matched more closely with the host and neighboring cities (MAPE = 0.21 + 0.1; Bray-Curtis = 0.14 + 0.08, respectively). Furthermore, post-lifting of campus and state mask mandates, the campus, host and neighboring city viral concentrations and variant compositions became indistinguishable (MAPE = 0.06 + 0.02; Bray-Curtis = 0.07 + 0.05, respectively). This data suggests that university COVID-19 policies effectively prevented campus-spill over, with no significant contribution to COVID-19 spread into the surrounding communities. Conversely, it was the surrounding communities that led to the spread of COVID-19 onto the campus. Therefore, wastewater surveillance proves instrumental in monitoring COVID-19 trends in surrounding areas, aiding in predicting the impact of easing campus restrictions on campus health.
由于无症状传播、病例报告中的偏差以及空间病例报告的限制,评估 COVID-19 政策在大学校园中的有效性,尤其是在减少向邻近城市传播(即 "校园溢出")方面的有效性具有挑战性。与传统的临床监测相比,废水监测的偏差更小、空间精确度更高,从而为大学 COVID-19 政策评估提供了可靠的数据。2020 年秋季至 2022 年春季的废水监测数据被用于评估大学 COVID-19 政策的影响。在校园对外界游客关闭期间,校园病毒浓度和变异体组成与所在城市和邻近城市不同(MAPE = 0.25 + 0.14;Bray-Curtis = 0.68 + 0.1,分别为0.25 + 0.14和0.68 + 0.1),表明校园与周围环境相对隔离。校园重新向游客开放后,病毒浓度和变异体组成与东道城市和邻近城市更为接近(MAPE = 0.21 + 0.1;Bray-Curtis = 0.14 + 0.08)。此外,在取消校园和州政府的口罩规定后,校园、所在城市和邻近城市的病毒浓度和变异体组成变得难以区分(MAPE = 0.06 + 0.02;Bray-Curtis = 0.07 + 0.05)。这些数据表明,大学的 COVID-19 政策有效地防止了校园病毒的扩散,对 COVID-19 向周边社区的传播没有显著影响。相反,正是周边社区导致了 COVID-19 向校园的扩散。因此,废水监测有助于监测周边地区的 COVID-19 趋势,有助于预测放宽校园限制对校园健康的影响。
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引用次数: 0
Outstanding Reviewers for Environmental Science: Water Research & Technology in 2023 环境科学》杰出评审员:2023 年水研究与技术
IF 5 4区 环境科学与生态学 Q3 ENGINEERING, ENVIRONMENTAL Pub Date : 2024-07-05 DOI: 10.1039/d4ew90019g
We would like to take this opportunity to thank all of Environmental Science: Water Research & Technology's reviewers for helping to preserve quality and integrity in chemical science literature. We would also like to highlight the Outstanding Reviewers for Environmental Science: Water Research & Technology in 2023.
我们借此机会感谢《环境科学》、《水研究与技术》杂志的所有审稿人,感谢他们帮助维护化学科学文献的质量和完整性:Water Research & Technology》的审稿人帮助维护化学科学文献的质量和完整性。我们还想特别表扬一下《环境科学:水研究与技术》2023 年的杰出审稿人:水研究与技术》2023 年的杰出审稿人。
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引用次数: 0
Graphene oxide-based probe for detecting Deltamethrin and Emamectin Benzoate Pesticides in Agricultural Run-off 基于氧化石墨烯的探针用于检测农业径流中的溴氰菊酯和苯甲酸戊酯杀虫剂
IF 5 4区 环境科学与生态学 Q3 ENGINEERING, ENVIRONMENTAL Pub Date : 2024-07-04 DOI: 10.1039/d4ew00328d
Suryyia Manzoor, Muhammad Hayat, Hina Raza, Elboughdiri Noureddine, Muhammad Imran Khan, Zeeshan Ali, Ayesha Javed, Nadeem Raza, Fahad Abdulaziz, Abdallah Shanableh
Insecticides adversely affect aquatic ecosystems due to their prolonged exposure, persistent nature, and bioaccumulation. Deltamethrin and emamectin benzoate are two such pesticides that enter water resources due to excessive use on fruits and vegetables causing serious concerns to living organisms. Here, we report the fabrication of a probe for selective solid-phase microextraction of targeted pesticides from agricultural runoff. The sorbent was designed using the novel dual-template graphene oxide-based molecularly imprinted organically modified silica. The study investigated effect of different parameters (time, pH, and temperature) on the efficacy of sorbent using response surface methodology. The sorbent presented high binding capacities of 42 mg g-1 and 27 mg g-1 for deltamethrin and emamectin benzoate respectively. The limit of detection and quantification for emamectin benzoate were 0.31 and 0.59 µg L-1, and for deltamethrin were 0.41 and 0.92 µg L-1. Sorbent’s kinetic studies suggested fitting of a pseudo-first-order model, with emamectin benzoate and deltamethrin having the lowest χ2values (0.72 and 1.69 respectively) and highest R2 (0.99). While studying adsorption isotherms, the Freundlich model was found to possess the best fit for both templates. Percentage recoveries were 93.3 and 94.2% for deltamethrin and emamectin benzoate, respectively. The selective detection of deltamethrin and emamectin benzoate from agricultural run-off was confirmed by real-sample analysis using high-performance liquid chromatography.
杀虫剂因其长期接触、持久性和生物累积性而对水生生态系统产生不利影响。溴氰菊酯和苯甲酸阿维菌素就是这两种杀虫剂,它们因在水果和蔬菜上的过度使用而进入水资源,对生物造成严重危害。在此,我们报告了一种用于从农业径流中选择性固相微萃取目标农药的探针的制造过程。该吸附剂是利用新型双模板氧化石墨烯基分子印迹有机改性二氧化硅设计的。研究采用响应面方法考察了不同参数(时间、pH 值和温度)对吸附剂功效的影响。该吸附剂对溴氰菊酯和苯甲酸阿维菌素的吸附容量分别为 42 mg g-1 和 27 mg g-1。苯甲酸阿维菌素的检出限和定量限分别为 0.31 和 0.59 µg L-1,溴氰菊酯的检出限和定量限分别为 0.41 和 0.92 µg L-1。吸附剂动力学研究表明,苯甲酸阿维菌素和溴氰菊酯的 χ2 值最低(分别为 0.72 和 1.69),R2 值最高(0.99),与假一阶模型相匹配。在研究吸附等温线时,发现 Freundlich 模型对两种模板的拟合效果最好。溴氰菊酯和苯甲酸阿维菌素的回收率分别为 93.3% 和 94.2%。通过使用高效液相色谱法进行实际样品分析,证实了从农业径流中选择性检测溴氰菊酯和苯甲酸阿维菌素的能力。
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引用次数: 0
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Environmental Science: Water Research & Technology
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