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Estimation of adaptability of the maternal lines of the winter rapeseed hybrids bred at the V.S. Pustovoit All-Russian Research Institute of oil crops in the central zone of the krasnodar region, Russia 俄罗斯克拉斯诺达尔地区中部V.S. Pustovoit全俄油料作物研究所培育的冬季油菜籽杂种母系适应性评估
Q3 Agricultural and Biological Sciences Pub Date : 2021-10-06 DOI: 10.22124/CJES.2021.5094
E. Strelnikov, E. Bochkarova, L. Gorlova, V. Serdyuk
In 2018-2020, the maternal lines of winter rapeseed, Brassica napus L. developed at the V.S. Pustovoit All-Russian Research Institute of Oil Crops: 1681, 1840-2, 1860, 39712, 39859, 39880, 40059, and 40177 were studied. The purpose of the research was a comparative estimation of the maternal lines of the winter rapeseed hybrids by calculated statistic parameters of adaptability, environmental and genetic plasticity, stability, stress resistance in the central zone of the Krasnodar region in different years. Indicators of environmental plasticity and stability were calculated by seed yield of the maternal lines of the winter rapeseed hybrids for three years due to the procedure by SA Eberhart, WA Rassell as revised by VА Zykin. To calculate a coefficient of a linear regression, the environmental indexes characterizing the variability of lines production conditions were defined. Stress resistance and genetic plasticity were determinated due to the equation by AA Rossielle & J Hamblin. Potential productivity and adaptability were identified by the procedure of LA Zhivotkov. The conditions of the 2020 were satisfactory for winter rapeseed plants growth and development. The average yield of the maternal lines was equal to 4.83 ton ha-1. The conditions of 2018 and 2019 were not quite favorable, since the environmental index was negative (Ij= -0.14 and -1.23), and average yield was 3.33 and 2.24 ton ha-1, respectively. The comparative estimation of the maternal lines of the winter rapeseed hybrids developed at the V.S. Pustovoit All-Russian Research Institute of Oil Crops by the parameters of the ecological plasticity and stability in the Krasnodar region showed that the line 39712 having the average seed yield per year of 3.70 ton ha-1 combines a high level of plasticity, adaptability, stability and is characterized by a high genetic plasticity. This line possesses high responsibility to the advanced cultivation conditions. The line 39880 with the average yield of 3.57 ton ha-1 also is characterized by environmental and genetic plasticity and adaptability. The lines 39859 and 40177 demonstrated the highest stability and resistance to the stress factors of environments. They are very adaptive to deterioration of the weather conditions. The selected maternal lines are very interesting for breeding of winter rapeseed hybrids of the Russian origin.
2018-2020年,对V.S.Pustovoit全俄油料作物研究所开发的冬油菜母系Brassica napus L.1681、1840-21860、39712、39859、39880、40059和40177进行了研究。本研究旨在通过计算克拉斯诺达尔地区中部地区不同年份的适应性、环境和遗传可塑性、稳定性、抗逆性等统计参数,对冬油菜杂交种的母系进行比较评价。根据SA Eberhart,WA Rassell的程序,根据VАZykin修订的程序,通过冬油菜杂交种母系三年的种子产量计算环境可塑性和稳定性指标。为了计算线性回归系数,定义了表征生产线生产条件可变性的环境指标。AA Rossielle和J Hamblin根据该方程确定了抗逆性和遗传可塑性。通过LA Zhivotkov程序鉴定了潜在生产力和适应性。2020年冬油菜生长发育条件较好。母系的平均产量为4.83吨ha-1。2018年和2019年的条件不太有利,因为环境指数为负(Ij=-0.14和-1.23),平均产量分别为3.33和2.24吨ha-1。利用克拉斯诺达尔地区生态可塑性和稳定性参数对俄罗斯石油作物研究所(V.S.Pustovoit All Russian Research Institute of Oil Crops)培育的冬油菜籽杂交种母系进行比较估计,稳定性,具有较高的遗传可塑性。这条线路对先进的栽培条件负有高度责任。39880品系的平均产量为3.57吨ha-1,也具有环境和遗传可塑性和适应性。线39859和40177表现出最高的稳定性和对环境应力因素的抵抗力。它们对天气条件的恶化非常适应。所选择的母系对于俄罗斯原产的冬油菜杂交种的选育非常有趣。
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引用次数: 0
Assessment of temperature effects on body shape in Nile tilapia, Oreochromis niloticus juveniles using the truss network system 用桁架网系统评价温度对尼罗罗非鱼幼鱼体型的影响
Q3 Agricultural and Biological Sciences Pub Date : 2021-10-01 DOI: 10.22124/CJES.2021.5122
Mazaher Zamani-Faradonbe, Y. Keivany, Farhad Kermani, E. Ebrahimi
Among the environmental factors, water temperature has a significant effect on many aspects of fish life. This study was carried out to examine effects of water temperature on body shape of Nile tilapia, Oreochromis niloticus during the early stages of life using truss network system. A total of 150 newly-born fry were reared in three temperature treatments (22, 28 and 34°C) for 40 days. At the end of experiment, the left side of the specimens was photographed. To achieve the body shape data, 13 landmark-points were digitized using tpsDig2 software. The extracted data were justified with generalized procrustes analysis, then the differences of body shape among groups were investigated using the principal component analysis (PCA), canonical variate analysis (CVA) and cluster analysis (CA). There were significant differences in body shape of the treatments. The results of CVA and CA indicated that one of the important factors in the aquatic habitats is water temperature that influences the body shape of the Nile tilapia during the first stages (larval and juvenile stages) of growth.
在环境因素中,水温对鱼类生活的许多方面都有重要影响。采用桁架网系统研究了尼罗罗非鱼(Oreochromis niloticus)生命早期水温对其体型的影响。在22℃、28℃和34℃三种温度处理下饲养150尾新生鱼苗40 d。实验结束时,对标本左侧进行拍照。采用tpsDig2软件对13个地标点进行数字化处理,获得体型数据。提取的数据采用广义普鲁克斯氏分析进行验证,然后采用主成分分析(PCA)、典型变量分析(CVA)和聚类分析(CA)对组间体型差异进行分析。两组在体型上有显著差异。CVA和CA结果表明,水温是影响尼罗罗非鱼生长初期(幼虫期和幼鱼期)体型的重要因素之一。
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引用次数: 0
Causal effects of population growth on energy utilization and environmental pollution: A system dynamics approach 人口增长对能源利用和环境污染的因果影响:系统动力学方法
Q3 Agricultural and Biological Sciences Pub Date : 2021-10-01 DOI: 10.22124/CJES.2021.5088
Masoud Mobaseri, S. N. Mousavi, M. Haghighi
Population growth will change the demand for food and energy resources and environmental pollution. Although early energy resources modeling has made vital efforts to model the energy system in the world, because of increasing complexity and integration of environmental, social, and economic functions, these models still need to be developed to show a system close to the real world to enhance sustainable management of natural resources. Hence, the main objective of this study is to design a system dynamics model for the food production system and energy demand in Iran in order to evaluate the effects of different population scenarios on key variables. In this regard, an integrated system dynamics simulation model was developed in Iran where managing energy resources is seriously challenging due to population growth and increasing food demand. The results of the behavioral test showed that the designed model can be used to investigate and simulate the effects of different population growth rate scenarios. Findings illustrated that by increasing population, if no further energy demand management policies were implemented, the total food demand and energy use increase by more than 1.35% and 3.31% respectively. Also, the annual air pollution change during 2014-2030 is expected to be around 4.41%. By changing the population growth rate in the form of population scenarios, the average annual energy demand in the first population scenario will be 20,277 barrels of crude oil and in the second population scenario will be 20049 barrels of crude oil. It seems that the change in the population growth rate will lead to an increase of 3.23% and 2.16% in average annual energy demand, respectively. The results showed that in the first population scenario, with a further increase in population variables, food demand and energy demand, the average change in pollution emission is 4.79%, which is at a higher level than the baseline conditions. In the second population scenario, changes in environmental pollution will be reduced to 4.31%. Therefore, given the effectiveness of population growth on the behavior of the energy system and pollution, the adoption of energy management policies should be considered by policy makers.
人口增长将改变对粮食和能源资源的需求以及环境污染。尽管早期的能源资源建模已经为世界能源系统建模做出了至关重要的努力,但由于环境、社会和经济功能的复杂性和集成性不断增加,这些模型仍需要开发,以显示一个接近现实世界的系统,从而加强自然资源的可持续管理。因此,本研究的主要目的是为伊朗的粮食生产系统和能源需求设计一个系统动力学模型,以评估不同人口情景对关键变量的影响。在这方面,伊朗开发了一个综合系统动力学模拟模型,由于人口增长和粮食需求增加,伊朗的能源管理面临严重挑战。行为测试结果表明,所设计的模型可用于研究和模拟不同人口增长率情景的影响。研究结果表明,随着人口的增加,如果不实施进一步的能源需求管理政策,粮食总需求和能源使用量分别增长1.35%和3.31%以上。此外,2014-2030年的年空气污染变化预计约为4.41%。通过以人口情景的形式改变人口增长率,第一人口情景下的年均能源需求将为20277桶原油,第二人口情景下将为20049桶原油。人口增长率的变化似乎将导致年均能源需求分别增长3.23%和2.16%。结果显示,在第一种人口情景中,随着人口变量、粮食需求和能源需求的进一步增加,污染排放的平均变化为4.79%,高于基线条件。在第二种人口情景中,环境污染的变化将减少到4.31%。因此,考虑到人口增长对能源系统行为和污染的有效性,决策者应该考虑采取能源管理政策。
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引用次数: 2
Changes in flora, life forms and geographical distribution of herbaceous plant species along an altitudinal gradient in oak forests, Iran 伊朗橡树林植物区系、生命形式和草本植物物种沿海拔梯度的地理分布变化
Q3 Agricultural and Biological Sciences Pub Date : 2021-10-01 DOI: 10.22124/CJES.2021.5121
Hengameh Mirhashemi, Fardin Moradi, H. Pourbabaei, Arash Mezbani
Intended to examine the effects of altitude on flora, life forms and geographical distribution of herbaceous species, this study was conducted in Kabirkouh forests of Darreshahr, located in Ilam Province, Iran, by selecting an area (circa 300 ha) in this forest. The study area was divided into three elevational classes and 63 systematic random plots were sampled (21 in each of the elevational classes). In order to record the herbaceous cover, the surface area of the plots was determined using the minimal area method. Then the herbaceous species and their percent coverage were recorded based on the Van der Marel criterion. A total of 109 herbaceous species belonging to 92 genera and 24 families were identified in the study area. The most frequent species were in the Asteraceae (23 species) and Poaceae (16 species) families. The results showed that in all three elevational classes, therophytes were the dominant life form of the area. The frequency of the therophytes in the first altitude class was higher than in the other classes. The second predominant life form was hemicryptophytes, whose frequency in the third class was higher than the other classes. Other life forms observed in the region were cryptophytes and chamaephytes, respectively which made up the least proportion of the area’s plant population. In addition, the results indicated that within all of the elevational classes, a high percentage of the existing plants of the study area belonged to the Irano-Turanian floristic region. Generally, the altitude had a significant effect on the distribution of the flora of the study area.
为了研究海拔对草本物种的植物区系、生命形式和地理分布的影响,本研究在伊朗伊拉姆省达尔沙赫尔的Kabirkouh森林中选择了一个面积(约300公顷)进行。研究区划分为3个海拔等级,系统随机采样63个样地(每个海拔等级21个)。为了记录草本覆盖,采用最小面积法确定样地的地表面积。然后根据Van der Marel标准记录草本物种及其盖度百分比。研究区共发现草本植物109种,隶属于24科92属。以菊科(23种)和禾本科(16种)居多。结果表明,在三个海拔等级中,植生植物都是该地区的优势生命形式。第一海拔等级的热生植物出现频率高于其他等级。第二大优势生命形式为半隐生物,其在第三类中的出现频率高于其他类。在该地区观察到的其他生命形式分别是隐生植物和变色虫,它们在该地区植物种群中所占比例最低。此外,结果表明,在所有海拔等级中,研究区现有植物中有很高的比例属于伊朗-图兰区。总体而言,海拔高度对研究区植物区系的分布有显著影响。
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引用次数: 0
Breeding of spring turnip rape, Brassica rapa L. var. subsp.campestris (L.) A.R Clapham at All-Russian Research Institute of Oil Crops 全俄油料作物研究所春萝卜油菜Brassica rapa L.var.subs.campestris(L.)A.R Clapham的选育
Q3 Agricultural and Biological Sciences Pub Date : 2021-10-01 DOI: 10.22124/CJES.2021.5144
Bochkarova Emma Borisovna, Gorlova Lyudmila Anatolievna, Serdyuk Vadim Vladimirovich, Strelnikov Evgeniy Aleksandrovich, Kuznetsova Galina Nikolaevna
Turnip rape, Brassica rapa L. var. sabsp. Campestris (L.) A.R.Clapham belongs to the large cabbage family (Brassicacea). Spring turnip rape among other oilseeds of the Brassicacea family occupies an important place and can be highly productive in the Northern regions of the European part, in the arid zones of the Lower Volga region, in the northern forest-steppe and subtaiga regions of Western and Eastern Siberia, where the longer growing season sometimes hinders rapeseed to achieve its full potential. Spring turnip rape ripens 13-15 days earlier than rapeseed; it is less heat- and drought-sensitive. However, interest in industrial cultivation of spring turnip rape appeared in the 70s of the last century after the creation of non-erucic and low-glucosinolate varieties, with the oil equivalent to olive oil in its fatty acid composition. Spring turnip rape has been bred at V.S. Pustovoyt All-Russian Research Institute of Oils Crops (VNIIMK) since 1982. The yellow-seeded varieties, Vostochnaya, Yantarnaya, and Zolotistaya, were created. The objective of this research was to find a  new promising breeding material for creating varieties of 000-type spring turnip rape from heterogeneous populations of the available VNIIMK varieties. To obtain a new source material, we used the pedigree method, followed by an assessment of the progeny of elite plants isolated from Yantarnaya and Zolotistaya. The result of our six-year efforts was four new promising samples No. 815, 844, 816, and 820, which exceed the standard variety, Zolotistaya, in seed yield by 10-14%. The oil content of seeds of the isolated samples varied from 47.8 to 48.6%, and exceeded the standard variety by 0.3–0.7% in three of them. Promising cultivars either had the same or lower weight of 1000 seeds (2.4-3.0 g), in comparison with Zolotistaya. All selected samples of turnip rape were characterized by a low glucosinolate content in seeds – 13.5–14.5 μmol g-1, and the fatty acid composition corresponded to the requirements for high-quality salad oils with erucic acid levels of 0.04–0.20% and a high content of oleic acid – 65.8–67.4%. After additional assessment, the best variety will be submitted for the State test.
萝卜油菜。Campestris(L.)A.R.Clapham属于大白菜科(Brassicacea)。在十字花科的其他油籽中,春萝卜油菜占据着重要的地位,在欧洲北部地区、下伏尔加地区的干旱地区、西伯利亚西部和东部的北部森林草原和亚泰格地区,产量很高,那里较长的生长季节有时会阻碍油菜籽充分发挥其潜力。春萝卜油菜比油菜早熟13-15天;它对高温和干旱不太敏感。然而,在上个世纪70年代,在生产出非芥酸和低硫代葡萄糖苷的品种后,人们开始对春季芜菁油菜的工业种植产生兴趣,其脂肪酸成分相当于橄榄油。自1982年以来,V.S.Pustovoyt全俄罗斯油料作物研究所(VNIIMK)一直在培育春萝卜油菜。黄籽品种Vostochnaya、Yantarnaya和Zolotitaya被创造出来。本研究的目的是从现有VNIIMK品种的异质群体中寻找一种新的有前景的育种材料,以创造000型春芜菁油菜品种。为了获得新的来源材料,我们使用系谱法,然后对从Yantarnaya和Zolotitaya分离的精英植物的后代进行评估。经过六年的努力,我们获得了四个新的有前景的样品,编号815、844、816和820,它们的种子产量比标准品种佐洛蒂斯塔高出10-14%。分离样品的种子含油量在47.8%至48.6%之间,其中三个样品的含油量超过标准品种0.3至0.7%。与Zolotitaya相比,有前途的品种具有相同或更低的1000粒种子重量(2.4-3.0克)。所有选定的芜菁油菜样品的特征是种子中硫代葡萄糖苷含量低——13.5–14.5μmol g-1,脂肪酸组成符合优质沙拉油的要求,芥酸含量为0.04–0.20%,油酸含量高——65.8–67.4%。经过额外评估,最佳品种将提交国家测试。
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引用次数: 0
Gaseous air pollutants dispersion emitted from point and line sources by coupling WRF-AERMOD models (Case study: Lowshan, Guilan Province, Iran) 基于WRF-AERMOD耦合模型的点源和线源大气气态污染物扩散研究(以伊朗桂兰罗山为例)
Q3 Agricultural and Biological Sciences Pub Date : 2021-10-01 DOI: 10.22124/CJES.2021.5131
Sima Farivar Ghaziani, A. A. Orkomi, M. Rajabi
The cement factories in urban areas can affect the air quality of cities due to the variety of pollutants emitted from cement production processes. In the present study, the impacts of the Khazar cement factory and two transportation axes between Guilan and Qazvin provinces were investigated on the air quality of Lowshan in Guilan Province, Iran in 2019. Due to the lack of suitable meteorological data for dispersion modeling, the WRF model was used to predict the meteorological parameters. The pollutants dispersion modeling was conducted by AERMOD software and the accuracy of results was confirmed by field measurements of NO2 obtained by passive samplers. The CO and NO2 dispersion modeling results showed that the air quality of Lowshan is in an acceptable situation compared to the ambient air quality standards. So that, the maximum one-hour concentration of NO2 in most residential areas was lower than the ambient standard, and only in small parts of the areas close to line sources, the concentration value was close to the standard limits. The maximum value of annually-averaged concentration of NO2 and the maximum one-hour concentration of CO were 17 ppb and 2.5 ppm, respectively, which are much lower than the clean air standards. Further investigation showed that in the cold weather seasons, due to the less vertical displacement of air and the decrease in the boundary layer height, the concentration of pollutants in the urban environment is higher than that in the warm weather seasons. Considering the night and day time wind roses showed that despite the existence of valley-mountain structure in the city, the air quality of the city is not affected by the mountain and valley breezes and also night and day wind roses do not follow the trend of these breezes.
由于水泥生产过程中排放的各种污染物,城市地区的水泥厂会影响城市的空气质量。在本研究中,调查了2019年Khazar水泥厂和吉兰省和加兹温省之间的两条运输轴线对伊朗吉兰省Lowshan空气质量的影响。由于缺乏合适的气象数据进行离散建模,因此使用WRF模型来预测气象参数。通过AERMOD软件进行污染物扩散建模,通过被动采样器获得的NO2现场测量结果证实了结果的准确性。CO和NO2扩散建模结果表明,与环境空气质量标准相比,Lowshan的空气质量处于可接受的状态。因此,大多数居民区NO2的最大一小时浓度低于环境标准,只有在靠近线源的小部分地区,浓度值接近标准限值。NO2的年平均浓度最大值和CO的一小时最大浓度分别为17ppb和2.5ppm,远低于清洁空气标准。进一步调查表明,在寒冷天气季节,由于空气的垂直位移较小,边界层高度降低,城市环境中的污染物浓度高于温暖天气季节。考虑到昼夜风玫瑰,表明尽管城市存在山谷山结构,但城市的空气质量不受山谷风的影响,昼夜风玫瑰也不遵循这些风的趋势。
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引用次数: 1
The change in heat inactivation of Escherichia coli O157:H7 after entering into the viable but non-culturable state in salted fish, Hypophthalmichthys molitrix 大肠杆菌O157:H7在咸鱼中进入可存活但不可培养状态后热灭活的变化
Q3 Agricultural and Biological Sciences Pub Date : 2021-10-01 DOI: 10.22124/CJES.2021.5130
M. Khezri, M. Rezaei, A. Mobarez, M. Zolfaghari
Many species of non-sporulating bacteria including Escherichia coli can enter into a viable but non-culturable (VBNC) state under stress conditions. In this study, the change in thermal resistance of E. coli O157:H7 after entering into the VBNC state in salted silver carp, Hypophthalmichthys molitrix, was investigated. E. coli O157:H7 was inoculated on the fish control group (TF) and on those fish with 30% NaCl (TF + 30% NaCl) at room temperature. Culturability of bacteria was determined using routine culture and colony counting on Sorbitol MacConkey agar. When bacteria were non-cultivable, the RT-PCR of 16S rRNA gene (including direct extraction and purification of RNA, DNase I treatment for removing DNA contamination, cDNA synthesis and electrophoresis of PCR products of cDNA) was used to detect VBNC E. coli O157:H7. Also, cultivable and VBNC E. coli O157:H7 were individually heat-treated at 55, 62 and 70 °C for 5 min. The samples were cooled and after 24 h, the thermal resistance of bacteria was determined through viability detection using RT-PCR of 16S rRNA gene. The culturability of bacteria was kept in fish treatment but they were non-cultivable in fish under 30% NaCl after 5 days. The positive expression of 16S rRNA in all studied treatments indicated the entering of E. coli O157:H7 into the VBNC state in fish treatment under 30% NaCl. Moreover, the RT-PCR of 16S rRNA gene showed that only VBNC forms of E. coli O157:H7 showed viability at 62 °C for 5 min which indicated the increased resistant of VBNC bacteria to the thermal inactivation. The ability of E. coli O157:H7 to enter into VBNC state in salted fish and also the increase of its thermal resistance suggest that VBNC E. coli O157: H7 can be considered as critical threat to public health and food safety.
包括大肠杆菌在内的许多非产孢细菌在胁迫条件下可以进入有活力但不可培养的(VBNC)状态。在本研究中,研究了O157:H7大肠杆菌在进入VBNC状态后,在腌鲢鱼中的耐热性变化。将O157:H7大肠杆菌接种在鱼类对照组(TF)和室温下用30%NaCl(TF+30%NaCl)接种的鱼类上。细菌的可培养性使用常规培养和在山梨醇-麦康基琼脂上的菌落计数来确定。当细菌不可培养时,16S rRNA基因的RT-PCR(包括RNA的直接提取和纯化、DNA污染的DNase I处理、cDNA合成和cDNA PCR产物的电泳)用于检测VBNC大肠杆菌O157:H7。此外,将可培养和VBNC大肠杆菌O157:H7分别在55、62和70°C下热处理5分钟。将样品冷却,24小时后,通过使用16S rRNA基因的RT-PCR进行活力检测来确定细菌的耐热性。在鱼类处理中保持了细菌的可培养性,但在30%NaCl下5天后,细菌在鱼类中不可培养。16S rRNA在所有研究处理中的阳性表达表明,在30%NaCl下的鱼类处理中,大肠杆菌O157:H7进入VBNC状态。此外,16S rRNA基因的RT-PCR显示,只有VBNC形式的大肠杆菌O157:H7在62°C下存活5分钟,这表明VBNC细菌对热灭活的抗性增加。O157:H7大肠杆菌在咸鱼中进入VBNC状态的能力及其耐热性的增加表明,O157:H7大肠杆菌可被视为对公众健康和食品安全的严重威胁。
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引用次数: 0
Rice husk and activated carbon-silica as potential bioadsorbents for wastewater purification 稻壳和活性炭二氧化硅作为潜在的废水生物吸附剂
Q3 Agricultural and Biological Sciences Pub Date : 2021-10-01 DOI: 10.22124/CJES.2021.5139
M. Mohammadpour, H. Babazadeh, A. Afrous, E. Pazira
Heavy metals are generally found in industrial wastewaters, affecting human health and living organisms. This study was therefore aimed to use bioadsorbents rice husk and activated carbon-silica to efficiently remove the heavy metals including lead (Pb) and cadmium (Cd) from an aqueous wastewater. The effects of bioadsorbent content, initial concentration, contact time, and pH value on the metal removal were investigated. An increased metal initial concentration lowered the removal efficiency of the bioadsorbents, and pH 6 provided the best condition for the removal of Pb and Cd. The use of rice husk and activated carbon-silica at pH 6 resulted in a maximum metal removal of 81% and 98% for Pb, while 88% and 100% for Cd respectively. The adsorption parameters were then determined by the Langmuir and Freundlich adsorption isotherms, and the experimental data were better fitted in the Freundlich adsorption isotherm model in comparison with the Langmuir adsorption isotherm model.
重金属通常存在于工业废水中,影响人类健康和生物体。因此,本研究旨在利用生物吸附剂稻壳和活性炭二氧化硅有效去除废水中的铅(Pb)和镉(Cd)等重金属。研究了生物吸附剂含量、初始浓度、接触时间和pH值对金属去除的影响。金属初始浓度的增加降低了生物吸附剂对Pb和Cd的去除效率,pH 6为去除Pb和Cd提供了最佳条件。在pH 6下使用稻壳和活性炭二氧化硅对Pb和Cd的最大去除率分别为81%和98%,对Cd的最大去除度分别为88%和100%。然后通过Langmuir和Freundlich吸附等温线确定吸附参数,与Langmuir吸附等温线模型相比,Freundlicch吸附等温线模型更好地拟合了实验数据。
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引用次数: 1
Removal of Cu (II) from industrial wastewaters through locally-produced adsorbent prepared from orange peel 利用橘皮制备的吸附剂从工业废水中去除Cu(II)
Q3 Agricultural and Biological Sciences Pub Date : 2021-09-30 DOI: 10.22124/CJES.2021.5080
Zainab A. Naser, H. Abdul-Hameed
Heavy metal ion contamination is a commonality in industries such as mining, electroplating, and metal processing. By increased discharge of copper contaminated water, toxic waste due to Cu (II) has become a severe ecological dilemma globally. Adsorption is considered one of the more practicable techniques suggested for heavy metal removal because of its sensitivity, ease of operation and reproducibility alongside economic benefits such as effectiveness. This study examined the adsorption characteristics of an adsorbent prepared from orange peel (OP) for copper (II) in solutions that were aqueous. In evaluating the useful benefit of the sorbent material, changes in solution pH, initial Cu (II) concentration, adsorbent dose, and contact time on the adsorption process were also examined. Additionally, adsorption equilibrium isotherm as well as adsorption kinetics were explored to understand adsorption processes.
重金属离子污染在采矿、电镀和金属加工等工业中是一种普遍现象。随着铜污染水体排放的增加,铜(II)有毒废弃物已成为全球严峻的生态困境。吸附法因其灵敏度高、易于操作、重现性好、效果好等经济效益被认为是较实用的重金属去除技术之一。本研究考察了由橙皮(OP)制备的吸附剂在水溶液中对铜(II)的吸附特性。考察了溶液pH、初始Cu (II)浓度、吸附剂剂量和接触时间对吸附过程的影响。此外,还研究了吸附平衡等温线和吸附动力学,以了解吸附过程。
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引用次数: 0
An inquiry into the relationships between BOD5, COD, and TOC in Tigris River, Maysan Province, Iraq 伊拉克迈桑省底格里斯河BOD5、COD和TOC关系的探讨
Q3 Agricultural and Biological Sciences Pub Date : 2021-09-28 DOI: 10.22124/CJES.2021.5079
H. Alewi, Emad A. Abood, Gaith Ali
Despite its universally wide use in water quality indices and evaluating the efficiency of wastewater treatment plants, chemical oxygen demand (COD) or biological oxygen demand (BOD5) analyses have disadvantages such as being imprecise, time-consuming, insensitive, as well as the production of hazardous wastes. Total organic carbon (TOC) will introduce as an alternative analysis, the relationship between BOD5, COD, and TOC has been investigated in this study. A total number of 216 samples were taken from three stations (kumait, Al Amara, and Al Majar Al Kabeer) in Tigris River, Maysan Province, Iraq. The sampling was on a monthly basis during a two-year period.  The tests were performed according to ASTM D7573 - 18ae1, ASTM D6238-98, and ASTM D125-06 for TOC, BOD5, and COD respectively at the Pollution Research Centre of the Al-Shatra Institute, the data were statistically analyzed using the SPSS program to predict a relationship between the COD or BOD5 and TOC. The analysis showed a good relationship concerning to a value of correlation coefficient, i.e., r = 0.93 or r = 0.94 between TOC and BOD5 or COD respectively, as well as the coefficient of determination, i.e., R2 = 0.91 or R2 = 0.92 between TOC and BOD5 or COD respectively. The validation of the suggested formulas has been tested using data from the Pollutant Centre in Al Shatra Institute for Shat al Gharaf River. The formulas gave reasonably acceptable values. It could be used in monitoring water quality and wastewater plants as a surrogate parameter to have pre-impression of the plant efficiency.
尽管化学需氧量(COD)或生物需氧量(BOD5)分析在水质指数和废水处理厂效率评估中普遍使用,但其缺点是不精确、耗时、不敏感,以及产生危险废物。总有机碳(TOC)将作为一种替代分析,本研究研究了BOD5、COD和TOC之间的关系。共从伊拉克迈桑省底格里斯河的三个站点(kumait、Al Amara和Al Majar Al Kabeer)采集了216个样本。抽样是在两年期间每月进行的。根据ASTM D7573-18ae1、ASTM D6238-98和ASTM D125-06分别在Al Shatra Institute污染研究中心对TOC、BOD5和COD进行测试,使用SPSS程序对数据进行统计分析,以预测COD或BOD5与TOC之间的关系。分析表明,TOC与BOD5或COD的相关系数分别为r=0.93或r=0.94,TOC与COD或BOD5的决定系数分别为R2=0.91或R2=0.92。使用Al Shatra研究所Shat Al-Gharaf河污染物中心的数据对建议配方的验证进行了测试。这些公式给出了合理可接受的值。它可以用于监测水质和废水处理厂,作为一个替代参数,对处理厂的效率有预先的印象。
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引用次数: 2
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caspian journal of environmental sciences
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