You Must use Turnitin to submit the exam. Water and Sewage Microbiology: 1. List the steps of in a water purification plant. a. Screening to separate the large contaminants from the water b. Coagulation to attract small contaminants c. Sedimentation where water sits and finishes coagulation d. Filtration to remove any small remaining contaminants and particles e. Disinfection by disinfecting chemicals such as chlorine to kill microorganism or remaining bacteria 2.
Task 1 M1 Describe the scientific principles behind each of the three procedure above. Vacuum filtration is a procedure when a sold needs separating from a solvent to react the mixture. Then the mixture of a solid is measured through the filtration paper in a Buhner funnel. The liquid is drained through the funnel into the flask. Equipment • Filter paper • Buhner funnel • Tubing • Clean solvent • Disposable dropper Method 1.
The action of the government under superfund are divided into two i.e. removal action which is immediate response to eliminate further threats from the waste site and remedial action which is to provide long term solutions in order to cleanup the toxic waste site. (Mark, 1994). In meeting standards, two general approaches can be considered in setting up a standard for cleanup in various toxic waste sites; there should be equal standards for states or federal uniform numerical concentration limits and a specific site standard that is based on the evaluation of factors like health of human ecological risk, technical feasibilities and as well cost. (Pieter,
Question #6 The risk-assessment paradigm consists of four primary elements: “hazard identification, dose-response assessment, exposure assessment, and risk characterization” (Haight, 2012, p. 34). These risk-assessment elements could be applied in any workplace that deals with hazardous chemicals, especially trichloroethylene. If a large trichloroethylene spill were to occur at your facility, emergency reponders should be famailar with the hazards associated with the chemical; (toxicity) effects of both acute and chronic exposure; first aid; flammabilty (flash point); accidental release measures (to include containment); exposure control, PPE required: “respirator with organic vapor cartridge, chemical resistant gloves, safety glasses with
Used solvents contain contaminants that can be removed by fractional distillation. The recycled solvents have purities suitable for re-use. Fractional distillation is used to separate the crude oil into its various components such as gasoline, kerosene oil, diesel oil, paraffin wax, liberating oil. Fractional distillation is also used for the purification of water. Water contains many dissolved impurities; these can be removed by this process.
In the lab, “Properties of Hydrates,” the purpose was to compare the properties of several well observable hydrates and to determine if dehydration is a reversible or irreversible change. The lab consisted of attaining a pea-size sample of each compound, burning it over a bunsen burner, and comparing the starting mass and the mass lost after the combustion. These results are important to be able to identify a variety of different chemicals that contain water molecules as part of their crystalline structure. Some can be removed by heating (resulting in evaporation) and some remain mostly unchanged. In this lab the answer will be found.
To identify the hazards associated with the handling, use, storage, and transport of chemicals used in the workplace and ; 2. To evaluate the degree of exposure of employees to the chemicals hazardous to health; 3. To evaluate the adequacy of existing control
When working as a chemical technician you work in a laboratory most of the time. Chemical technicians set up the laboratory equipment, such as mass spectrometers and simple laboratory glassware, required for the tests and experiments they do. The jobs of a chemical technician also require that they do require maintenance on the equipment. In experiments where airborne toxins or temperature may affect the results of an experiment, they maintain the required conditions in laboratories. Such as dust and toxic free “clean rooms” and refrigerated spaces.
In these studies, there are some parameters have to be observed; spectral features, reaction response, limit of detection, pH optimization, reproducibility and regeneration. Volatile organic compounds (VOCs) will be measured by taking gas sample and transporting it to laboratory instruments. So, the instrument that will be use is fluorescence spectrophotometer. 1.2 Pollution of Volatile organic compounds (VOCs) in Environment There is a growing public concern over industrial impact on the environment. Monitoring environmental quality in a broad sense includes global
We have two other tasks to accomplish in the lab we must determine the denisty of the vinegar sol and the molarity of the acetic acid in a vinegar The mass percent can be our data. To accomplish our tasks, we will need to make very accurate volume and mass measurement .Burette and pipettes are useful in accurately measurement PROCEDURE: Prepration of Burette 1 .check the burette by rinsing down the sides with distilled water bottle to check if water sheets down inside of the burette If water droplets are observed, the burette should be washed before use. Be careful not to scratch the inner surface if you find it necessary to use a burette brush to clean it Rinse the burette well with tap water including the stop cock and washers. 2 Finally rinse the burette at least twice with small portions of yours NAOH solution to ensure that all water is removed. 3.