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Effect of hydrogen peroxide and ferrous ion on the degradation of 2-Aminopyridine 过氧化氢和亚铁离子对2-氨基吡啶降解的影响
IF 1.2 Q3 Environmental Science Pub Date : 2023-01-02 DOI: 10.1080/23249676.2022.2031322
R. Karale, D. V. Wadkar, M. Wagh
Pharmaceutical compounds 2-Aminopyridine were detected in drinking water, surface water, and groundwater. 2-Aminopyridine is a colourless solid used for manufacturing drugs, sulphapyridine which is extremely poisonous and carcinogenic. Its appearance in drinking water needs prior treatment to dispose of safely. Fenton, Photo-Fenton oxidation processes were carried out to degrade 2-Aminopyridine. Parameters like pH, the dosage of Hydrogen peroxide, and Iron are optimized for the effective degradation of a 2-Aminopyridine compound in water. The effect of the initial concentration (10-80) mg/L of a 2-Aminopyridine pharmaceutical compound on degradation was studied. Drug at initial concentration of 10 mg/L, 40 mg/L and 80 mg/L is 100% degraded in 30 mins,45 mins and 120 mins respectively. Similarly, COD removals of 94.6%, 88.6% and 81% were detected at 10 mg/L, 40 mg/L and 80 mg/L of initial drug dosage. The degradation was enhanced by photo-Fenton oxidation. Both the drug degradation and COD reduction were improved by UV-C-assisted photo-Fenton oxidation processes.
在饮用水、地表水和地下水中检测到药物化合物2-氨基吡啶。2-氨基吡啶是一种无色固体,用于制造具有剧毒和致癌性的药物磺胺吡啶。其出现在饮用水中需要事先处理才能安全处理。采用Fenton、光Fenton氧化法降解2-氨基吡啶。优化了pH、过氧化氢用量和铁等参数,以有效降解水中的2-氨基吡啶化合物。研究了2-氨基吡啶类药物初始浓度(10 ~ 80)mg/L对降解的影响。初始浓度为10 mg/L、40 mg/L和80 mg/L的药物分别在30 min、45 min和120 min降解100%。在初始给药剂量为10 mg/L、40 mg/L和80 mg/L时,COD去除率分别为94.6%、88.6%和81%。光- fenton氧化增强了降解效果。uv - c辅助光- fenton氧化工艺提高了药物降解和COD的还原效果。
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引用次数: 1
Using volunteered geographic information data for flood mapping – Wadi Deffa El Bayadh Algeria 利用自愿提供的地理信息数据绘制洪水地图——阿尔及利亚的Wadi Deffa El Bayadh
IF 1.2 Q3 Environmental Science Pub Date : 2022-12-15 DOI: 10.1080/23249676.2022.2155716
Azzedine Otmani, A. Hazzab, M. Atallah, C. Apollonio, A. Petroselli
This study presents a coupled application of hydrological and hydraulic models to reconstruct a flash flood event of the ungauged watercourse of Wadi Deffa, Algeria. The objective is to compare the performances of three hydrological models (rational method, EBA4SUB, HEC-HMS) and two hydraulic bidimensional models (HEC-RAS 2D, FLO-2D) by using the Volunteered Geographic Information (VGI) data. The comparison between the observed and simulated flood areas showed satisfactorily performance of the EBA4SUB-FLO-2D approach compared to the other approaches. The analysis of the observed and simulated flood depths showed a good estimate using the approaches EBA4SUB-FLO-2D and EBA4SUB-HEC-RAS 2D. The best estimate of the two flood depth approaches is attributed to the hydrological model EBA4SUB in estimating the peak flow. The results demonstrate that the EBA4SUB-FLO-2D modeling approach can provide reliable data for the management of flood risks in the ungauged watersheds of the southwest region of Algeria.
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引用次数: 0
Feasibility assessment of a BWRO desalination plant powered by renewable energy sources 可再生能源驱动的BWRO海水淡化厂的可行性评估
IF 1.2 Q3 Environmental Science Pub Date : 2022-11-27 DOI: 10.1080/23249676.2022.2144496
Albashir K. Elfaqih, Said O. Belhaj, Abualqasem M. Sawed
This paper investigated the technical, economic, and environmental aspects of using six different power plant configurations powered by renewable energy sources (RES), namely photovoltaic (PV) and wind to provide electricity to operate a reverse osmosis brackish groundwater desalination plant (BWRO) with a capacity of 2 m3/hr, and load power of 6.5 kW. The BWRO plant is located at the Libyan Center for Solar Energy Research and Studies (LCSERS) in the city of Tajura. The six proposed power plants, backed-up with/out batteries and diesel generator were modeled and simulated using HOMER software. Optimal design configurations resulting from the simulation were then selected based on levelized cost of energy (LCOE) and net present cost (NPC) appropriate to the operating conditions at the site. The study showed that the Grid-Connected photovoltaic power plant (PVGC) yielded the lowest levelized cost of water (LCOW), a direct consequence of its lower cost of energy.
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引用次数: 0
Design and optimization of a sequential and hybrid advanced oxidation process system using response surface methodology 用响应面法设计和优化顺序和混合高级氧化工艺系统
IF 1.2 Q3 Environmental Science Pub Date : 2022-10-14 DOI: 10.1080/23249676.2022.2125092
M. Seyyedi, B. Ayati
Of different approaches for refinery effluent treatment, the application of Advanced Oxidation Processes (AOPs) (e.g. electro-Fenton) and nano Zero-Valent Iron (nZVI) particles have been of great interest lately. Associated constraints with these methods inspired the design of a sequential hybrid system by which higher treatment efficiency and less energy consumption were acquired compared to a conventional system. The hybrid system consisted of an electro-Fenton and an nZVI slurry system working in sequence. Both sub-systems were first optimized using the Response Surface Methodology (RSM), and the hybrid system was then designed accordingly. 94.06% of COD removal was achieved by the hybrid system in only 47.5 min at its optimum condition (CODinitial = 500 mg/L, [nZVI] = 0.9 g/L, and H2O2/Fe2+ = 3.6). Whereas it took more than 75 min for the single electro-Fenton system to acquire similar efficiency. GC–MS analysis also supported the superiority of the hybrid system over the conventional one.
在炼油厂污水处理的不同方法中,高级氧化工艺(AOPs)(如电芬顿)和纳米零价铁(nZVI)颗粒的应用最近引起了人们的极大兴趣。与这些方法相关的约束启发了顺序混合系统的设计,通过该系统,与传统系统相比,获得了更高的处理效率和更少的能耗。混合系统由按顺序工作的电Fenton和nZVI浆料系统组成。两个子系统首先使用响应面方法(RSM)进行优化,然后相应地设计混合系统。混合系统仅用47.5分钟就达到了94.06%的COD去除率 min(COD初始值 = 500 mg/L,[nZVI] = 0.9 g/L和H2O2/Fe2+ = 3.6) min,以获得类似的效率。GC–MS分析也支持了混合系统相对于传统系统的优势。
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引用次数: 1
Baseflow index assessment for agriculture-industry led Ramganga river basin 农业-工业主导的拉姆甘加河流域基流指数评估
IF 1.2 Q3 Environmental Science Pub Date : 2022-10-14 DOI: 10.1080/23249676.2022.2132306
Ankit Modi, V. Tare
The baseflow index is a crucial parameter in basin-scale water balance studies. However, it has frequently been neglected for various reasons, viz. near-impossible direct measurement, simplification of the model, and non-existence of the hydro-meteorological data. Hence, baseflow is computed for the Ramganga river basin in the present study, for which a scientific assessment had not been done previously. The classified-archived-observed river discharge data are obtained from Central Water Commission (CWC) and are applied in an analytical filter to assess the baseflow index (BFI) at all exiting CWC hydro-meteorological sites in the Ramganga river basin. The average values of BFIs for the CWC sites vary between 27% and 38%. The results are found to be consistent and showed significance with the hydrological characteristics of the basin. The results have also been discussed to account for various possible anthropogenic effects, which are assessed as having no significant impact.
基流指数是流域尺度水平衡研究中的一个关键参数。然而,由于各种原因,它经常被忽视,即几乎不可能直接测量,模型的简化,以及水文气象数据的不存在。因此,在本研究中计算了Ramganga河流域的基流,此前尚未对其进行科学评估。分类存档的观测河流流量数据来自中央水利委员会(CWC),并应用于分析过滤器中,以评估Ramganga河流域所有现有CWC水文气象站点的基准流量指数(BFI)。CWC站点的BFI平均值在27%至38%之间。研究结果与流域水文特征相一致,具有重要意义。还讨论了这些结果,以解释各种可能的人为影响,这些影响被评估为没有重大影响。
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引用次数: 0
Examination of the exponential wash-off function using experimental data 利用实验数据检验指数冲刷函数
IF 1.2 Q3 Environmental Science Pub Date : 2022-09-29 DOI: 10.1080/23249676.2022.2125093
Zhen-ren Guo, Nabiihah Abd Salam, Hj Mohd Khairuldini Hj Metali, Asmaal Muizz Sallehhin Hj Mohammad Sultan, S. Shams
The standard exponential wash-off function has been widely adopted in urban stormwater quality models and tested in many studies of sediment wash-off experiments. There is neither sufficient information on the wash-off coefficients for other types of pollutant nor a good mathematical interpretation that accounts for the effects of surface features on wash-off processes. This study assesses the standard exponential wash-off function using experimental data on the wash-off of various types of pollutant. In-situ wash-off experiments using simulated rainfalls were conducted in typical urban areas with various landuse. Experimental data from the literature were also analysed to support the examination. Mass balance requirement was always applied as a criterion in the experimental data analysis and wash-off model examination. The experimental results indicate that wash-off processes of organic pollutants (BOD5), nitrate (NO3), total oil and grease (TOG), total petroleum hydrocarbon (TPH) and coliform stochastically comply with the standard exponential function. Highlights In-situ wash-off experiments were conducted for BOD5, NO3, TOG, TPH, coliforms and TSS. Wash-off coefficients of BOD5, NO3, TOG, TPH, coliforms and TSS are identified stochastically. Mass balance requirement is introduced to examine the mathematical interpretations of wash-off models. An improved exponential wash-off function with more input parameters is suggested.
标准指数冲刷函数已被广泛应用于城市雨水质量模型中,并在许多泥沙冲刷实验研究中进行了测试。关于其他类型污染物的冲刷系数,既没有足够的信息,也没有很好的数学解释来解释表面特征对冲刷过程的影响。本研究使用各种类型污染物的冲刷实验数据来评估标准指数冲刷函数。利用模拟降雨在不同土地利用的典型城市地区进行了原位冲刷实验。还对文献中的实验数据进行了分析,以支持这项研究。在实验数据分析和冲刷模型检验中,质量平衡要求一直被用作一个标准。实验结果表明,有机污染物BOD5、硝酸盐NO3、总油脂TOG、总石油烃TPH和大肠菌群的冲刷过程随机符合标准指数函数。重点对BOD5、NO3、TOG、TPH、大肠菌群和TSS进行了原位冲刷实验。对BOD5、NO3、TOG、TPH、大肠菌群和TSS的冲刷系数进行了随机测定。引入质量平衡要求来检验冲刷模型的数学解释。提出了一种具有更多输入参数的改进指数冲刷函数。
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引用次数: 1
Adsorption of methylene blue from aqueous solution using different types of activated carbon 使用不同类型的活性炭从水溶液中吸附亚甲基蓝
IF 1.2 Q3 Environmental Science Pub Date : 2022-09-16 DOI: 10.1080/23249676.2022.2120918
Fatin A. Alnasrawi, S. Kareem, Layla Ali Mohammed Saleh
In this study, four types of adsorbents were examined for their ability to remove methylene blue MB from aqueous solution by adsorption in a fixed bed system. The adsorbents used were activated carbon (AC), manufactured activated carbon (ACPP1), chemically activated carbon with nitric acid (10% wt) (ACPP2), and with nitric acid and H2SO4 (ratio 1:1) (ACPP3). 28 experiments were conducted to test the effect of MB concentrations, adsorbent bed depth, and solution flow rate. Langmuir and Freundlich as isotherm models were analyzed by nonlinear regression. For AC and ACPP1 the adsorption occurred under heterogeneous and multilayer surfaces. Conversely, for ACPP2 and ACPP3 adsorbent, homogeneous and monolayer control adsorption of MB on this adsorbent and maximum adsorption capacity was 33.149 and 38.508 mg/g for MB onto ACPP2 and ACPP3, respectively. The effect of the flow rate (132,200 and 250 cc/min), bed height (0.05, 0.1, and 0.15 m), and initial MB concentration (150, 300, and 500 mg/l) on the performance of the breakthrough curves were clarified. The Bohart-Adams and Thomas-BDST models have a better correlation in relation to the analysis of fixed bed data.
在这项研究中,研究了四种类型的吸附剂在固定床系统中吸附去除水溶液中亚甲基蓝MB的能力。所使用的吸附剂有活性炭(AC)、人造活性炭(ACPP1)、硝酸(10% wt)化学活性炭(ACPP2)和硝酸与H2SO4(1:1比例)活性炭(ACPP3)。通过28个实验考察了MB浓度、吸附剂床层深度和溶液流速对吸附效果的影响。采用非线性回归分析了Langmuir和Freundlich等温模型。对于AC和ACPP1,吸附发生在多相和多层表面。而对于ACPP2和ACPP3吸附剂,MB在ACPP2和ACPP3上的最大吸附量分别为33.149 mg/g和38.508 mg/g。研究了流量(132,200和250 cc/min)、床层高度(0.05、0.1和0.15 m)和初始MB浓度(150、300和500 mg/l)对突破曲线性能的影响。Bohart-Adams和Thomas-BDST模型对固定床数据的分析具有较好的相关性。
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引用次数: 4
Investigation of trends in extreme events: a case study of Ceyhan Basin, Turkey 极端事件趋势调查:以土耳其杰伊汉盆地为例
IF 1.2 Q3 Environmental Science Pub Date : 2022-09-12 DOI: 10.1080/23249676.2022.2113462
M. Yuce, Musa Eşit, Veysel Kalaycioglu
Investigation of natural hazards is crucial for regional water management and disaster preparedness. In this study, trends in annual maximum, minimum and average temperature; annual maximum dry season deficit (DS deficit), dry season duration (DS duration), wet season excess rain (WS excess) and wet season duration (WS duration) were examined. The analyses of extreme events were identified by applying the SPI drought index for multiple-time scales of 1-, 3-, 6-month, for meteorological stations located in the Ceyhan Basin, Turkey. While the homogeneity of the data was analyzed with the Wallis-Moore method, trend analysis was performed with the Mann-Kendall test. In addition, the determination of the change-point year was performed with the Standard Normal Homogeneity Test (SNHT) and Buishand’s Range Test. The findings will be useful to water management decision-makers in the Ceyhan River Basin in assessing the impact of droughts and planning drought mitigation strategies to avoid future drought risks.
对自然灾害的调查对于区域水资源管理和灾害防备至关重要。在这项研究中,年最高、最低和平均温度的趋势;研究了年最大旱季亏空(DS亏空)、旱季持续时间(DS持续时间)、雨季过量降雨(WS过量)和雨季持续时间(WS持续时间)。通过应用SPI干旱指数对土耳其杰伊汉盆地气象站的1个月、3个月、6个月的多个时间尺度进行极端事件分析。虽然数据的同质性是用Wallis-Moore方法分析的,但趋势分析是用Mann-Kendall检验进行的。此外,通过标准正态均匀性试验(SNHT)和Buishand范围试验确定了变化点年份。研究结果将有助于杰伊汉河流域的水管理决策者评估干旱的影响,并规划缓解干旱的战略,以避免未来的干旱风险。
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引用次数: 4
Sol-gel template synthesis of visible photoactive Cu-S co-doped mesoporous TiO2 catalyst 溶胶-凝胶模板法合成可见光活性Cu-S共掺杂介孔TiO2催化剂
IF 1.2 Q3 Environmental Science Pub Date : 2022-09-02 DOI: 10.1080/23249676.2022.2116116
A. Hamisu, S. S. Bala, A. Bello, A. Abubakar, A. A. Adeyi
A new visible photoactive catalyst (Cu, S/PEG-PVA/TiO2) was synthesized by the sol-gel method. In addition, Cu, S/TiO2 and Bare TiO2 were synthesized to compare their properties and activities. The synthesized catalysts were characterized using XRD, N2 adsorption–desorption measurements, SEM, TEM, EDX, UV-Vis spectroscopy and TGA. The photocatalytic activities of the synthesized photocatalysts were evaluated by measuring the photocatalytic degradation of 4-nitrophenol under visible light irradiation. Then, the impacts of three parameters, (catalyst loading, pH and H2O2 concentration) for optimization and modelization of the 4-nitrophenol photodegradation were studied using the response surface methodology. Optimal conditions obtained from statistical analysis at a catalyst loading of 1 gL−1, pH of 3.98 and H2O2 concentration of 8 mg/L have shown the highest 4-NP percentage degradation of 70.5% in 1 h. The results predicted by the models were found to be in good agreement with those obtained by performing the experiment (R 2 = 0.9443 and Adj-R 2 =  0.9038).
采用溶胶-凝胶法合成了一种新型可见光活性催化剂(Cu,S/PEG-PVA/TiO2)。此外,还合成了Cu、S/TiO2和Bare TiO2,比较了它们的性能和活性。利用XRD、N2吸附-脱附测量、SEM、TEM、EDX、UV-Vis光谱和TGA对合成的催化剂进行了表征。通过测定在可见光照射下对4-硝基苯酚的光催化降解,评价了合成的光催化剂的光催化活性。然后,利用响应面法研究了催化剂负载量、pH和H2O2浓度三个参数对4-硝基苯酚光降解优化和模型化的影响。在催化剂负载量为1时通过统计分析获得的最佳条件 gL−1,pH为3.98,H2O2浓度为8 mg/L的4-NP降解率最高,为70.5% h.发现模型预测的结果与通过进行实验获得的结果非常一致(R2 = 0.9443和调整R 2 =  0.9038)。
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引用次数: 0
Discharge measurements field validation using remote-controlled boat with ADCP 使用ADCP遥控船进行流量测量现场验证
IF 1.2 Q3 Environmental Science Pub Date : 2022-09-02 DOI: 10.1080/23249676.2022.2116115
Daniel Iozzi Sperandelli, Tiago Zenker Gireli
This study examined field validation of discharge measurements with acoustic Doppler current profiler (ADCP) on a remote-controlled boat. Between 2015 and 2020, 112 measurements were assessed at 8 gaging stations in the Paraná River basin, Brazil. SonTek M9 ADCP measurements were compared to rating curves reference discharges. Hypothesis tests were used to verify if mean percentage deviations from the measurements in relation to the reference are equal to zero at a significance level of 0.05. Statistical results indicated that field measurements did not differ from reference values and that percentage deviations are similar to that of previous validation studies. Measurements with ADCP and remote-controlled boat were faster and offered less risk of accidents for hydrometrists than manned boat.
本研究检查了在遥控船上使用声学多普勒电流剖面仪(ADCP)进行流量测量的现场验证。2015年至2020年间,在巴西巴拉那河流域的8个测量站进行了112次测量评估。SonTek M9 ADCP测量值与额定曲线参考放电值进行了比较。假设检验用于验证与参考相关的测量的平均百分比偏差是否等于零,显著性水平为0.05。统计结果表明,现场测量值与参考值没有差异,百分比偏差与之前的验证研究相似。ADCP和遥控船的测量速度更快,水文测量仪的事故风险也比载人船低。
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引用次数: 0
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Journal of Applied Water Engineering and Research
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