In this lesson, our instructor Bryan Cardella gives an introduction on water pollution and treatment. He discusses the biochemical oxygen demand, waterborne illnesses, nutrients in water, oil and sediment, acid mine drainage, surface water pollution, groundwater pollution, wastewater treatment, water reuse, water pollution and environmental law, and the Hudson River story.
Water pollution sources include: urban runoff, chemical spills, leaks, sediment, air fallout, agricultural seepage, and saltwater intrusion
Biochemical oxygen demand (BOD) is the amount of oxygen required for biochemical decomposition. Dead organic matter is typically introduced to streams from agricultural runoff or natural sources, and this has a huge impact on BOD
Waterborne illness (e.g. fecal coliform bacteria) sickens 10s of thousands of people each year in the U.S.
Eutrophication is typically caused by too much nitrogen or phosphorus ending up in a body of water from agricultural runoff. The huge rise in algae can lead to depleted oxygen content and widespread death in an ecosystem
Oil pollution has been a major topic in recent years (2010 Deepwater horizon and 1989 Exxon Valdez spills)
Sediment pollution is also a major culprit in the gradual destruction of aquatic ecosystems
Acid mine drainage results from too much sulfuric acid ending up in the water from abandoned mines
Surface-water pollution can originate from point sources or non-points sources, and some great ways to reduce surface water pollution are to reduce the sources and/or treat the water (with nanotechnology, for example)
Groundwater pollution exists as well, which is disconcerting considering the amount of people that depend on it for drinking water and the proximity of groundwater sources to waste-disposal sites
Wastewater treatment, or sewage treatment, can be achieved in many ways, such as: septic-tanks, and treatment and reuse (inadvertent, indirect, or direct)
The Hudson River story sheds light on water pollution and how to combat the problem
Water Pollution & Treatment
Lecture Slides are screen-captured images of important points in the lecture. Students can download and print out these lecture slide images to do practice problems as well as take notes while watching the lecture.
This book includes a comprehensive review of the key AP Environmental Science concepts and targeted strategies for acing every section of the exam. Additionally, the book includes two full length practice tests with full answer explanations.
This book is an updated manual that offers a brand-new diagnostic test to pinpoint the test taker's strengths and weak areas, two full-length practice exams with all questions answered and explained, a detailed review of all test topics, supplemented with practice questions and quizzes with answers, an overview of the test plus helpful test-taking strategies, and hundreds of diagrams and illustrations .