Advanced Environmental and Earth Sciences Teacher Guide

(PS-2979)

Teacher manual for Advanced Environmental and Earth Sciences labs. Has both the printed version and a flash drive with teacher tips, a PDF of teacher version and editable Word student version.

Water Treatment

Lab Summary

Use pH, conductivity, and turbidity sensors to demonstrate how water treatment processes such as filtration, flocculation, and sedimentation improve water quality.

Theory

Students demonstrate how water treatment processes such as filtration, flocculation, and sedimentation improve water quality.

Method

Students will gain experience conducting the following procedures:

  • Evaluating water treatment processes using direct observation and by measuring conductivity, pH, and turbidity.
  • Using test results to design, build, test, and evaluate a water treatment process.

Sensors / Equipment Used:

Advanced Water Quality Sensor

(PS-2230)

MultiMeasure sensor that incorporates pH, conductivity, temperature, and the optical dissolved oxygen probe.

PASPORT Turbidity Sensor

(PS-2122)

Measures the turbidity level (cloudiness) of water in nephelometric turbidity units (NTU). For use with PASPORT Interfaces.

Materials Used:

Activated charcoal - 2 g
Balance - 1 per class
Beaker, 150-mL - 4
Beaker, 50-mL 
Beaker, large ("wastewater" container)
Graduated cylinder, 100-mL 
Graduated pipet, 50-mL, and bulb 
Lint-free lab tissue box
Paper napkins, dinner, white, smooth - 12
Paper towels, white - 4
Soda bottle, empty, 500-mL 
Stirring rod 
Swimming pool water clarifier solution, 4% - 2 to 4 mL
Test tube, 18-mm OD or greater 
Wash bottle containing water 
Wastewater sample (made from coffee, soil, and kitty litter if the soil has a low clay content) -500 mL
Water - 300 mL

The Associated Bundle:

Advanced Environmental and Earth Science Standard Sensor Bundle

(PS-2916A)

Standard bundle for Advanced Environmental and Earth Sciences Teacher Guide,

Interface Required

This experiment may require software and an interface for data collection.