scholarly journals Spray adjuvant characteristics affecting agricultural spraying drift

2015 ◽  
Vol 35 (1) ◽  
pp. 109-116 ◽  
Author(s):  
RONE B. DE OLIVEIRA ◽  
ULISSES R. ANTUNIASSI ◽  
MARCO A. GANDOLFO
Keyword(s):  
Surface Tension ◽  
Wind Tunnel ◽  
Aqueous Solutions ◽  
Formation Process ◽  
Droplet Diameter ◽  
Brilliant Blue ◽  
Medium Size ◽  
Blue Dye ◽  
Methods Of Evaluation ◽  
Spray Adjuvants

This study defined the main adjuvant characteristics that may influence or help to understand drift formation process in the agricultural spraying. It was evaluated 33 aqueous solutions from combinations of various adjuvants and concentrations. Then, drifting was quantified by means of wind tunnel; and variables such as percentage of droplets smaller than 50 μm (V50), 100 μm (V100), diameter of mean volume (DMV), droplet diameter composing 10% of the sprayed volume (DV0.1), viscosity, density and surface tension. Assays were performed in triplicate, using Teejet XR8003 flat fan nozzles at 200 kPa (medium size droplets). Spray solutions were stained with Brilliant Blue Dye at 0.6% (m/ v). DMV, V100, viscosity cause most influence on drift hazardous. Adjuvant characteristics and respective methods of evaluation have applicability in drift risk by agricultural spray adjuvants.

Removal of remazol brilliant blue dye from aqueous solutions using water hyacinth root powder

2018 ◽  
Vol 122 ◽  
pp. 331-338 ◽  
Author(s):  
M. Rajeswari Kulkarni ◽  
C. Bhagyalakshmi ◽  
Deeksha Anand ◽  
R. Nidhi Herle
Keyword(s):  
Aqueous Solutions ◽  
Water Hyacinth ◽  
Brilliant Blue ◽  
Blue Dye ◽  
Water Hyacinth Root

scholarly journals Potential of adjuvants to reduce drift in agricultural spraying

2013 ◽  
Vol 33 (5) ◽  
pp. 986-992 ◽  
Author(s):  
Rone B. de Oliveira ◽  
Ulisses R. Antuniassi ◽  
Alisson A. B. Mota ◽  
Rodolfo G. Chechetto
Keyword(s):  
Wind Tunnel ◽  
Vegetable Oil ◽  
Mineral Oil ◽  
Field Conditions ◽  
Brilliant Blue ◽  
Blue Dye ◽  
Bottom Part ◽  
Wind Tunnel Tests ◽  
Chemical Groups ◽  
Selection Of

The reduction of pesticide spraying drift is still one of the major challenges in Brazilian agriculture. The aim of this study was to evaluate the potential of different adjuvant products, such as surfactants, drift retardants, mineral oil and vegetable oil for reducing drift in agricultural spraying. The experiment consisted of quantifying drift of sprayings of 18 adjuvants dissolved in water under controlled conditions in a wind tunnel. Tests were performed in triplicates with spraying nozzles type Teejet XR8003 VK, pressure of 200kPa and medium drops. Solutions sprayed were marked with Brilliant Blue dye at 0.6% (m v-1). The drift was collected using polyethylene strips transversally fixed along the tunnel at different distances from the nozzle and different heights from the bottom part of the tunnel. Drift deposits were evaluated by spectrophotometry in order to quantify deposits. The adjuvants from chemical groups of mineral oil and drift retardant resulted in lower values of drift in comparison with surfactants and water. The results obtained in laboratory show that the selection of appropriate class and concentration of adjuvants can significantly decrease the risk of drift in agricultural spraying. However, the best results obtained in laboratory should be validated with pesticide under field conditions in the future.

Study on Fe3O4 Magnetism Nanoparticle Catalytic Degradation of Brilliant Blue Dye in Wastewater

2013 ◽  
Vol 726-731 ◽  
pp. 2960-2963
Author(s):  
Ai Hui Liang ◽  
Dong Qin Han ◽  
Hui Yue Gan ◽  
Zhi Liang Jiang
Keyword(s):  
Spectrophotometric Method ◽  
Degradation Rate ◽  
Catalytic Degradation ◽  
Brilliant Blue ◽  
Blue Dye ◽  
Optimal Conditions ◽  
Buffer Solution ◽  
The Media

In this paper, the effect of Fe3O4nanoparticle catalytic degradation brilliant blue X-BR dye was studied using spectrophotometric method. It was found that in the media of pH 0.65 HCl-NaAc buffer solution, 100 μmol/L H2O2, 0.7 g/L Fe3O4nanoparticle and the temperature 25°C, the degradation rate for reactive brilliant blue X-BR was over 93.5% in 20 min under the optimal conditions.

scholarly journals Surface Thermodynamics, Viscosity, Activation Energy of N-Methyldiethanolamine Aqueous Solutions Promoted by Tetramethylammonium Arginate

Entropy ◽  
2020 ◽  
Vol 22 (12) ◽  
pp. 1337
Author(s):  
Xiangfeng Tian ◽  
Lemeng Wang ◽  
Pan Zhang ◽  
Dong Fu
Keyword(s):  
Activation Energy ◽  
Surface Tension ◽  
Diffusion Coefficient ◽  
Aqueous Solutions ◽  
Quantitative Relationship ◽  
Viscosity Data ◽  
Surface Thermodynamics ◽  
Surface Entropy ◽  
Operation Conditions ◽  
Surface Enthalpy

The surface tension and viscosity values of N-methyldiethanolamine (MDEA) aqueous solutions promoted by tetramethylammonium arginate ([N1111][Arg]) were measured and modeled. The experimental temperatures were 303.2 to 323.2 K. The mass fractions of MDEA (wMDEA) and [N1111][Arg] (w[N1111][Arg]) were 0.300 to 0.500 and 0.025 to 0.075, respectively. The measured surface tension and viscosity values were satisfactorily fitted to thermodynamic models. With the aid of experimentally viscosity data, the activation energy (Ea) and H2S diffusion coefficient (DH2S) of MDEA-[N1111][Arg] aqueous solution were deduced. The surface entropy and surface enthalpy of the solutions were calculated using the fitted model of the surface tension. The quantitative relationship between the calculated values (surface tension, surface entropy, surface enthalpy, viscosity, activation energy, and H2S diffusion coefficient) and the operation conditions (mass fraction and temperature) was demonstrated.

Photocatalysis of Coomassie Brilliant Blue Using Clay Mineral

2016 ◽  
Vol 869 ◽  
pp. 765-767 ◽  
Author(s):  
Layane Rodrigues Almeida ◽  
João Sammy Nery Souza ◽  
Edson Cavalcanti Silva Filho ◽  
Josy Anteveli Osajima
Keyword(s):  
Organic Pollutants ◽  
Uv Light ◽  
Brilliant Blue ◽  
Blue Dye ◽  
Secondary Treatment ◽  
Toxic Compounds ◽  
Coomassie Brilliant Blue ◽  
Kinetics Of ◽  
Coomassie Brilliant ◽  
Photocatalytic Processes

The presence of organic pollutants, which cannot be eliminated by conventional processes of primary and secondary treatment, can be problematic. Photocatalytic processes offer an efficient breakdown of organic pollutants into non-toxic compounds such as CO2 and H2O. This paper proposes the use of the titanium dioxide embedded in palygorskite as a photoactive material in the degradation of cationic dye, Coomassie Brilliant Blue. The system was irradiated using UV light for a maximum time of 120 minutes. The concentration of the dye used was 1.0x10-4 mol L-1 in 0.5 g L-1 of the photoactive material. The kinetics of the system was monitored by UV-Vis spectrophotometry. In 120 minutes of radiation, the process of photocatalysis reduced the initial concentration of the Coomassie Brilliant Blue dye in half.

Metal-organic framework Uio-66 for adsorption of methylene blue dye from aqueous solutions

2017 ◽  
Vol 14 (9) ◽  
pp. 1959-1968 ◽  
Author(s):  
A. A. Mohammadi ◽  
A. Alinejad ◽  
B. Kamarehie ◽  
S. Javan ◽  
A. Ghaderpoury ◽  
...  
Keyword(s):  
Methylene Blue ◽  
Aqueous Solutions ◽  
Metal Organic Framework ◽  
Blue Dye ◽  
Methylene Blue Dye ◽  
Metal Organic ◽  
Organic Framework

scholarly journals Adsorption of Pollutants from Aqueous Solutions Using Activated and Non-Activated Oak Shells: Parametric and Fractional Factorial Design Study. Part II. Removal of Phenol and Dyes

2003 ◽  
Vol 21 (2) ◽  
pp. 189-198
Author(s):  
Sameer Al-Asheh ◽  
Fawzi Banat ◽  
Rana Saeidi ◽  
Salam Abu Zaid
Keyword(s):  
Methylene Blue ◽  
Aqueous Solutions ◽  
Factorial Design ◽  
Fractional Factorial Design ◽  
Sorption Process ◽  
Fractional Factorial ◽  
Phenol Concentration ◽  
Blue Dye ◽  
Batch Adsorption ◽  
Solution Ph

As in Part I, non-activated (natural) and chemically activated oak shells were evaluated for their ability to remove phenol and Methylene Blue (as a typical dye component) from aqueous solutions. Batch adsorption experiments were conducted to investigate the effect of contact time, sorbent concentration, phenol concentration and the pH of the solution on the sorption process. Activated oak shells adsorbed more phenol than natural oak shells under the same conditions. A decrease in sorbent concentration or an increase in phenol concentration or solution pH resulted in an increase in phenol uptake by the oak shells. The uptake of Methylene Blue increased with decreasing sorbent concentration and with an increase in the dye concentration, but decreased significantly with solution pH. According to the fractional factorial design technique, the sorbent type employed (natural or activated) had the most significant influence on phenol or Methylene Blue uptake followed by sorbent concentration and then sorbate concentration. Interaction amongst the different operating variables played an important role in the uptake of phenol or Methylene Blue dye by the adsorbent considered.

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