scholarly journals Removal of tetracyclines from aqueous solutions by electrocoagulation/pecan nutshell coupling processes: synergistic effect and mechanism

2020 ◽  
Vol 82 (4) ◽  
pp. 683-694
Author(s):  
Kunkun Xiao ◽  
Dongmei Huang ◽  
Chunli Kang ◽  
Siyang Sun
Keyword(s):  
Energy Demand ◽  
Removal Rate ◽  
Operating Time ◽  
Ideal Condition ◽  
Coupling Process ◽  
Plate Spacing ◽  
Unit Energy ◽  
Biomass Materials ◽  
Coupling Processes ◽  
The Ideal

Abstract The present work compared electrocoagulation (EC)/pecan shell (PS) coupling process with a simple electrocoagulation (EC) process for the removal of tetracyclines (TCs). The results indicated that the addition of appropriate PS could lead to the enhancement of the removal efficiency and decrease of operating time via synergistic influence, including conventional EC process, biomass materials adsorption, charge neutralization and coordination adsorption. The ideal condition for the coupling process was 2.5 mA/cm2 for current density and 3 cm for plate spacing. Based on the optimum condition, when the dosage of PS was 5 g/L, the initial concentration of tetracycline hydrochloride (TC), oxytetracycline hydrochloride (OTC) and chlortetracycline hydrochloride (CTC) was 250 mg/L, the removal rate of PS was 55.90%, 45.10% and 14.98% higher than those of EC process after 40 min treatment. In addition, compared to conventional EC process, the unit energy demand (UED) decreased by 49.62%, 53.2 4% and 26.35% and the unit electrode material demand (UEMD) decreased by 49.80%, 85.65% and 44.37%, respectively, which means more energy conservation and environmental protection.

Removal of Acid Black 1 and Basic Red 2 from aqueous solutions by electrocoagulation/Moringa oleifera seed adsorption coupling in a batch system

2015 ◽  
Vol 72 (2) ◽  
pp. 203-213 ◽  
Author(s):  
Helder Pereira de Carvalho ◽  
Jiguo Huang ◽  
Jiaheng Ni ◽  
Meixia Zhao ◽  
Xinyu Yang ◽  
...  
Keyword(s):  
Energy Consumption ◽  
Aqueous Solutions ◽  
Contact Time ◽  
Energy Demand ◽  
Moringa Oleifera ◽  
Stainless Steel Electrode ◽  
Steel Electrode ◽  
Coupling Process ◽  
Short Contact Time ◽  
Unit Energy

The removal of Acid Black 1 (AB1) and Basic Red 2 (BR2) from aqueous solutions via an electrocoagulation (EC)/Moringa oleifera seeds (MOS) adsorption coupling process by using aluminum and stainless steel electrode in a batch reactor is described in this study. The influences of the operational parameters, i.e. current density, MOS dosage, and dye initial concentration, on degree of color removal were studied, and the unit energy demand, the unit electrode material demand, and the charge loading were calculated and discussed. The amounts of adsorbent and energy consumption were considered as main criteria of process evaluation, and ideal conditions were chosen. The addition of an appropriate MOS dosage (0.6 g/L for AB1 and 5 g/L for BR2) resulted in faster decolorization of dyes especially at lower current densities and was simultaneously accompanied by a significant reduction in contact time compared to the conventional simple EC process. The coupling process achieved degree of removals above 99.3% and 94% for AB1 and BR2, respectively. The EC/MOS coupling technique could be recommended to replace the conventional simple EC because of its high degree of removal, short contact time, and low energy consumption.

scholarly journals Removal of malachite green from aqueous solutions by electrocoagulation/peanut shell adsorption coupling in a batch system

2017 ◽  
Vol 75 (8) ◽  
pp. 1830-1838 ◽  
Author(s):  
Xiansheng Wang ◽  
Jiaheng Ni ◽  
Shuo Pang ◽  
Ying Li
Keyword(s):  
Malachite Green ◽  
Removal Efficiency ◽  
Current Density ◽  
Energy Demand ◽  
Operating Time ◽  
Peanut Shell ◽  
Optimum Conditions ◽  
Batch System ◽  
Unit Energy ◽  
Maximum Removal

A electrocoagulation (EC)/peanut shell (PS) adsorption coupling technique was studied for the removal of malachite green (MG) in our present work. The addition of an appropriate PS dosage (5 g/L) resulted in remarkable increase in the removal efficiency of MG at lower current density and shorter operating time compared with the conventional EC process. The effect of current density, pH of MG solution, dosage of PS and initial concentration of MG were also investigated. The maximum removal efficiency of MG was 98% under optimum conditions in 5 min. And it was 23% higher than that in EC process. Furthermore, the unit energy demand (UED) and the unit electrode material demand (UEMD) were calculated and discussed. The results demonstrated that the EC/PS adsorption coupling method achieved a reduction of 94% UED and UEMD compared with EC process.

scholarly journals The IDEAL household energy dataset, electricity, gas, contextual sensor data and survey data for 255 UK homes

2021 ◽  
Vol 8 (1) ◽  
Author(s):  
Martin Pullinger ◽  
Jonathan Kilgour ◽  
Nigel Goddard ◽  
Niklas Berliner ◽  
Lynda Webb ◽  
...  
Keyword(s):  
Survey Data ◽  
Energy Demand ◽  
Secondary Data ◽  
Hot Water ◽  
Power Measurement ◽  
Sensor Data ◽  
Energy Awareness ◽  
Household Energy ◽  
Wide Range ◽  
The Ideal

AbstractThe IDEAL household energy dataset described here comprises electricity, gas and contextual data from 255 UK homes over a 23-month period ending in June 2018, with a mean participation duration of 286 days. Sensors gathered 1-second electricity data, pulse-level gas data, 12-second temperature, humidity and light data for each room, and 12-second temperature data from boiler pipes for central heating and hot water. 39 homes also included plug-level monitoring of selected electrical appliances, real-power measurement of mains electricity and key sub-circuits, and more detailed temperature monitoring of gas- and heat-using equipment, including radiators and taps. Survey data included occupant demographics, values, attitudes and self-reported energy awareness, household income, energy tariffs, and building, room and appliance characteristics. Linked secondary data comprises weather and level of urbanisation. The data is provided in comma-separated format with a custom-built API to facilitate usage, and has been cleaned and documented. The data has a wide range of applications, including investigating energy demand patterns and drivers, modelling building performance, and undertaking Non-Intrusive Load Monitoring research.

Approaching to the ideal condition of plasma confinement by applying external resonant fields in IR-T1 tokamak

2015 ◽  
Vol 81 (3) ◽  
Author(s):  
Sakineh Meshkani ◽  
Mahmood Ghoranneviss ◽  
Mansoureh Lafouti
Keyword(s):  
Magnetic Field ◽  
Turbulent Transport ◽  
Edge Plasma ◽  
Ideal Condition ◽  
Plasma Confinement ◽  
Applied Bias ◽  
Inverse Results ◽  
Electric And Magnetic Field ◽  
Helical Magnetic Field ◽  
The Ideal

For understanding the effect of resonant helical magnetic field (RHF) and bias on the edge plasma turbulent transport, the radial and poloidal electric field (Er, EP), poloidal and toroidal magnetic field (BP, Br) were detected by the Langmuir probe, magnetic probe and diamagnetic loop. The poloidal, toroidal and radial velocity (VP, Vr, Vt) can be determined from the electric and magnetic field. In the present work, we have investigated the effect of the magnitude of bias (Vbias = 200v, Vbias = 320v) on Er, EP, BP, Bt, VP, Vr, Vt. Moreover, we applied RHF with L = 2, L = 3 and L = 2 and 3 and investigate the effect of the helical windings radius on above parameters. Also, the experiment was repeated by applying the positive biasing potentials and RHF's simultaneously. The results show that by applying bias to the plasma at t = 15 msec at r/a = 0.9, Er, BP and Bt increase while EP decreases. The best modification occurs at Vbias = 200v. By applying RHF to the plasma, both the electric and magnetic field vary. Er reaches the highest in the presence of RHF with L = 3. The same results are obtained for BP, Bt, VP and Vt. While the inverse results are obtained for EP and Vr. Finally, RHF and bias are applied simultaneously to the plasma. With applied bias with Vbias = 200v and RHF with L = 2 and 3, we reach to the ideal circumstance. The same results obtain in the situation with Vbias = 320v and RHF with L = 2 and 3.

scholarly journals Energy Dissipation in Solid Roller Bucket and Controlled Stilling Basin for Ogee Stepped Spillway

2019 ◽  
Vol 8 (4) ◽  
pp. 2109-2112
Keyword(s):  
Energy Dissipation ◽  
Laboratory Experiments ◽  
Ideal Condition ◽  
Stepped Spillway ◽  
Type Ii ◽  
Dimensional Parameter ◽  
Stilling Basin ◽  
Sequent Depth ◽  
Tail Water ◽  
The Ideal

Hydraulic jump type II stilling basin is generally preferred as an energy dissipator for ogee spillway but it is uneconomical due to longer structure. On the other hand, roller bucket uses relatively shorter structure over a sloping apron or horizontal stilling basin. In this study, an attempt has been made to evaluate the performance of an ogee profile stepped spillway in combination with solid roller bucket and stilling basin type II for energy dissipation. Laboratory experiments are performed on a physical working model of ogee profile stepped spillway at discharge ranging from 0.0032 to 0.0069 m3 /s for a head of 1.5m, 4m & 7m and the results compared for energy dissipation (non-dimensional parameter (y c / h) = 0.69). The model results show that stepped spillway model without v-notch achieves 92.40 % energy dissipation. Thus this model is found to be more suitable to acquire the ideal condition of sequent depth and tail water depth in stilling basin for all the discharges.

scholarly journals Structural mitigation measures for flood reduction in urban area: A case study of Ciliwung watershed

2020 ◽  
Vol 200 ◽  
pp. 01004
Author(s):  
Rizki Maulana Fadillah ◽  
Hafizh Tsaqib ◽  
Aryanti Karlina Nurendyastuti ◽  
Miftahul Jannah ◽  
Rian Mantasa Salve Prastica
Keyword(s):  
River System ◽  
Mitigation Measures ◽  
Ideal Condition ◽  
Water Infrastructure ◽  
Embankment Dam ◽  
The Earth ◽  
Earth Embankment ◽  
Infrastructure Maintenance ◽  
The Ideal

Flooding is an obstacle for water infrastructure which installed in a river system in Ciliwung, West Java, Indonesia. The climate change triggers unpredictable rainfall which occurs in the watershed, therefore the vulnerability of river and other infrastructures are alarming. The rehabilitation and maintenance strategies are needed to make water infrastructures in the river system obtain lower damage. The research aims to simulate the 2-D HEC-RAS modelling of river system and stability. The result produces the water level of the river even in 1000-year discharge flood. Also, the research proposes the earth embankment dam for flood reduction in the watershed. The dam is designed according to the ideal condition. The simulation of HEC-RAS shows that the river experiences flooding in a certain condition. Besides, the research concludes that designed dam could overcome the flooding problem and suitable strategy for water infrastructure maintenance towards flooding impacts. Further investigation towards soil data for designed dam should be further analyzed to obtain better and comprehensive understanding.

Rekindling Hong Kong’s Magic

2017 ◽  
Author(s):  
Yue Chim Richard Wong
Keyword(s):  
Economic Growth ◽  
Health Care ◽  
Hong Kong ◽  
Regulatory Control ◽  
Public Expenditures ◽  
Ideal Condition ◽  
Political Landscape ◽  
Basic Law ◽  
Deficit Financing ◽  
The Ideal

Hong Kong’s divisive and fragmented political landscape provides the ideal condition for the proliferation of regulatory control. When the pressure on our government to spend more on housing, health care, and education is even greater than that in Singapore, and the Basic Law disallows deficit financing, then raising the regulatory burden is the only political solution available. Unfortunately, this will have far more damaging consequences on the economy. What is to be done? Can Hong Kong steer a path that allows it to fund the rising demand for public expenditures while promoting economic growth, so that the additional spending is economically affordable and politically feasible? That question will be addressed in this volume.

scholarly journals E-books for children with autism: Best read alone or with a therapist?

2020 ◽  
Vol 36 (1) ◽  
pp. 19-32
Author(s):  
Erin Soares ◽  
Therese Miller ◽  
Kathleen Ciffone ◽  
Kirsten Read
Keyword(s):  
Children With Autism ◽  
Autism Spectrum ◽  
Ideal Condition ◽  
Storybook Reading ◽  
Applied Behavioral Analysis ◽  
Story Reading ◽  
Children With Asd ◽  
Shared Storybook Reading ◽  
The Individual ◽  
The Ideal

Children with autism spectrum disorder (ASD) seemingly prefer tablets to other methods of intervention, though professionals posit that a therapist’s presence is beneficial. In this experiment, two unique e-stories were created specifically for children with ASD. Ten children with low- or nonverbal ASD heard each story presented on an iPad; one narrated through the iPad, and one read by a therapist trained in Applied Behavioral Analysis (ABA). The within-participants design enabled researchers to measure the individual benefit of each type of story reading. After hearing each book, participants were tested on their comprehension via multiple choice, sequencing, and open-ended questions. Results indicated that the ideal condition for these young children with low- and nonverbal ASD was the therapist-read condition. These findings suggest that simple stories presented on a rewarding platform, with the minimally intrusive assistance of a therapist, provide young, verbally-challenged children with ASD with a foundation for receiving the benefits of shared storybook reading.

scholarly journals The Hiccup: a dynamical coupling process during the autumn transition in the Northern Hemisphere – similarities and differences to sudden stratospheric warmings

2015 ◽  
Vol 33 (2) ◽  
pp. 199-206 ◽  
Author(s):  
V. Matthias ◽  
T. G. Shepherd ◽  
P. Hoffmann ◽  
M. Rapp
Keyword(s):  
Historical Data ◽  
Middle Atmosphere ◽  
High Latitudes ◽  
Mean Flow ◽  
Coupling Process ◽  
Vertical Coupling ◽  
Dynamical Coupling ◽  
Similarities And Differences ◽  
Epoch Analysis ◽  
Coupling Processes

Abstract. Sudden stratospheric warmings (SSWs) are the most prominent vertical coupling process in the middle atmosphere, which occur during winter and are caused by the interaction of planetary waves (PWs) with the zonal mean flow. Vertical coupling has also been identified during the equinox transitions, and is similarly associated with PWs. We argue that there is a characteristic aspect of the autumn transition in northern high latitudes, which we call the "hiccup", and which acts like a "mini SSW", i.e. like a small minor warming. We study the average characteristics of the hiccup based on a superimposed epoch analysis using a nudged version of the Canadian Middle Atmosphere Model, representing 30 years of historical data. Hiccups can be identified in about half the years studied. The mesospheric zonal wind results are compared to radar observations over Andenes (69° N, 16° E) for the years 2000–2013. A comparison of the average characteristics of hiccups and SSWs shows both similarities and differences between the two vertical coupling processes.

Stability Analysis of the New Repetitive Learning Controller for Cutting Systems

2006 ◽  
Vol 505-507 ◽  
pp. 1039-1044
Author(s):  
Ming Guo Her ◽  
Jih Ming Chen ◽  
Ming In Ho
Keyword(s):  
Stability Analysis ◽  
Asymptotic Stability ◽  
Dynamic System ◽  
Robust Stability ◽  
Global Asymptotic Stability ◽  
Periodic Motion ◽  
Ideal Condition ◽  
Repetitive Learning ◽  
Cutting System ◽  
The Ideal

The new repetitive learning for the control of the periodic motion has already been developed. The structure and parameters of the dynamic system don’t need to be known exactly by using this controller, in advance. And it will be shown the new repetitive learning controller is more efficiency than the traditional controller. In this study, it will be proved the system using new repetitive learning controller is global asymptotic stability under the ideal condition. It will be also shown the system is robust stability under the nonideal condition. Lastly, the noncircular cutting system that will be illustrated to show the efficiency of stability for the repetitive learning controller is conducted.

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