The objective of this research was to use tannic acid (TA) as polyphenol monomer to synthesize the nano-composite membranes and its application for dye removal from water. The chemical cross-linking reaction between the acyl chloride groups in organic solution and polysufone porous ultrafiltration membrane and also phenolic groups in aqueous solution and acyl chloride groups in organic solution accomplished in the water/oil interfacial zone. The combined effects of factors were studied by Response Surface Methodology (RSM). Then, the rejection of direct blue 71, fouling mechanism and antifouling properties of the nano-composite membranes were investigated and the prepared membrane was conducted for dye removal at optimum conditions. Synthesized …show more content…
Synthetic dyes have a various structure. The azo, sulfur, triphenylmethyl, phthalocyanine, anthraquinone and indigoid are the most chemical classes of dyes. However, the azo derivatives are the majority of synthetic dyes that employed in the industry. Nowadays, more than 100000 dyes are commercially recognized and the amount of dyes produced in the world is estimated about 10000 tons per year. It is estimated that about 1-2% in the production phase (about 40-65 L of textile effluent per kg of produced cloth (4-6) and 1-10% in the use phase can be discharged in the environment. Also, textile wastewater contains high suspended solids, chemical oxygen demand, biological oxygen demand, heat and chemicals such as salts as well as high color (7, 8). The synthetic dyes have a complex aromatic structure that cause them increasingly resistant to biodegradation and stable (9-11). Thus, dye wastewater are potentially carcinogen and toxic for the environments (3, 12). Therefore, synthetic dyes can create adverse effects on the environment as well as health. The environmental concern related to synthetic dyes is due to their recalcitrance nature as well as their high visibility (1, 4, 13). Several technologies have been employed for the synthetic dyes removal from colored waters and wastewaters that involve biological or enzymatic processes, adsorption, photocatalysis, oxidation process, membrane filtration, precipitation and ion exchange (7, 9). High cost, low efficiency and complexity of the operation and maintenance are the disadvantage of these technologies (3,
For this lab, zeolite and magnetized zeolite were synthesized and compared with charcoal to find out with would be the most effective in the sequestering of Procion Red dye. Finding the concentration and absorbance of each zeolite, magnetized zeolite, and charcoal, along with a calibration curve, the best adsorbent is determined. Charcoal was the overall best sequestration of the Procion Red dye, since the adsorbent was highest compared to the others. Introduction Pollution has increased in the environment over the years, so the purpose of this experiment is to find the best adsorbent of chemicals to reduce the pollution.
That mixture was then filtered through a coffee filter. Nine test tubes were prepared in order to perform this dye coupled reaction. One contained 5.0ml of the potato and pH buffer mixture, 2.0 ml of hydrogen peroxide, and 1.0 of guaiacol to serve as a blank for the spectrophotometer. Four test tubes were filled with 2.0 ml of hydrogen peroxide and 1.0 ml of guaiacol, used for measurement by the spectrophotometer, each. The last four were filled with 4.0 ml of the potato and pH buffer mixture and 1.0 ml of peroxidase.
The sunset yellow dye had a faster and more linear reaction time than allura red; this could be caused by incorrect dilutions of the dye and
The hypothesis that was provided to this question was If Phenol Red is add with the other chemicals then a color change will occur. Methods: To begin the lab 40 mL of Phenol red were obtained in a beaker, and 40 mL of water were obtained in a separate beaker. Next one plastic baggie was
In this experiment, extraction was used as a separation technique to separate the acid, base, and neutral compounds. In extraction, two immiscible solvents with different polarities are used to dissolve and separate different solute components, so they form two distinct liquid layers. In this experiment, ethyl acetate, an organic solvent, and an aqueous solution, were used as the two immiscible solvents. The extraction solvent must be capable of dissolving one of the mixture components, without irreversibly reacting with it. While initially it seems as though the organic acid, base, and neutral compounds would never pass into the aqueous layer, the conjugate acid and base of the organic base and acid respectively are soluble in water.
The purpose of this laboratory experiment was to identify the molarities of dye present in green Powerade and then create a solution that possessed the same concentrations. This experiment consisted of two parts of experimentation, the first part focused on identifying the dyes present and at what concentration, and the second part focused on the recreation of the stock solution. To successfully complete this experiment, a small cuvette, full of 2 mL of green Powerade, was placed into a UV spectrometer in order to identify which wavelengths were being absorbed and reflected. With this information a complete series of dilutions using yellow #5 and blue #1 dye in ratios of 1:1, 1:2, 1:3, 1:4, and 1:5 were conducted to find the max peak absorbancy
Factors Affecting the Rate of Osmosis I. Research Question: How does the amount of Monosodium glutamate or MSG (C5H8NO4Na) concentration affect the osmosislarity of cow (Bos taurus ) liver cells? II. Background information Osmosis is the diffusion of water molecules through a partially permeable membrane from a region of high water concentration to a region of low water concentration. The factors affecting the rate of osmosis are temperature, concentration gradient, molecular size, surface area to volume ratio, and permeability. Animal liver cells, such as cow liver cells have a nucleus, cytoplasm, and a cell membrane.
The first synthetic dye, Mauveine, was accidentally discovered by William Henry Perkin in 1856 while he was looking for a cure for malaria. Different dyes are made of different dye molecules. Dyes have colour because they absorb light in the visible spectrum (400–700 nm), have at least one chromophore, have a conjugated system (a structure with alternating double and single bonds), and exhibit resonance
A study on the effect of concentration of ethanol on beetroot membrane permeability. Background info: Membrane permeability is the state of membrane that allows liquids or gasses pass through it. Temperature, pH and concentration of alcohol are 3 factors that affect the membrane permeability of any cell. In the beetroot plant, the red or purple pigment that is located in the vacuole, which is embedded to the membrane, is called bectacyanin or betalain.
Chlorine is manufactured commercially by running an electric current through salt water. As results of this process a free chlorine, hydrogen, and sodium hydroxide are produced. Consequently, the Chlorine is changed to its liquid form by compressing the gas, the resulting liquid is the chlorine, which is usually mixed into drinking water and swimming pools to disinfect bacteria. Unfortunately, the chlorination causes the formation of the Disinfection By-products (DBPs), also known as Trihalomethanes (THMs) as a 90% of the population is drinking water that contain (DBPs). Researches proven that THMs is causing cancer in the laboratory animals.
4.Literature research: Osmosis is the spontaneous net movement of solvent molecules through a semi-permeable membrane into a region of high solute concentration, in the direction that tends to equalize the solute concentrations on two sides. There are 3 types of osmotic conditions that affect living cells, they are: hypertonic, hypotonic and isotonic states. These terms describe the osmotic state of the solution that surrounds a cell, not the solution inside the cell. Hypertonic conditions cause water to diffuse out of the cell, making the cell shrivel. Hypotonic conditions cause water to move into the cell swelling or bursting it.
Various conventional techniques have been employed for the removal of chromium from water which includes Reverse osmosis, Chemical precipitation, Filtration, Ion exchange,
Now this is where Joseph Wilbrand comes into play, in 1863, German chemist Joseph wilbrand found a very yellow dye called trinitrotoluene, as a dye though, it was a mediocre dye, it wasn't very stable, and soon better yellow dyes came along. So trinitrotoluene was put on the shelf, and forgotten about for a while. TNT's explosive capabilities weren't even realized until years after its invention. Its explosiveness went unnoticed because TNT has a fairly high activation energy. Another German chemist Carl haussermann, found In 1891, he could just go back
Hair color was created around 1907. By Eugene Schueller who was credited for the first permanent and commercial hair dye, he called it L’Oreal. A few decades later Lawrence Geld a New York chemist developed a hair color that penetrate the hair shaft. In the 50’s he further
Dyestuff can be obtained by extracting the natural resource and there is certain method