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Related Concept Videos

Buffer Effectiveness02:19

Buffer Effectiveness

49.0K
Buffer solutions do not have an unlimited capacity to keep the pH relatively constant . Instead, the ability of a buffer solution to resist changes in pH relies on the presence of appreciable amounts of its conjugate weak acid-base pair. When enough strong acid or base is added to substantially lower the concentration of either member of the buffer pair, the buffering action within the solution is compromised.
The buffer capacity is the amount of acid or base that can be added to a given volume...
49.0K
Buffers: Overview01:30

Buffers: Overview

4.5K
Buffers play a crucial role in stabilizing the pH of a solution by mitigating the effects of small amounts of added acid or base. They consist of a weak acid and its conjugate base or a weak base and its conjugate acid. A solution of acetic acid and sodium acetate is an example of a buffer that consists of a weak acid and its salt: CH3COOH (aq) + CH3COONa (aq). An example of a buffer that consists of a weak base and its salt is a solution of ammonia and ammonium chloride: NH3 (aq) + NH4Cl (aq).
4.5K
Buffers02:56

Buffers

164.3K
A solution containing appreciable amounts of a weak conjugate acid-base pair is called a buffer solution, or a buffer. Buffer solutions resist a change in pH when small amounts of a strong acid or a strong base are added. A solution of acetic acid and sodium acetate is an example of a buffer that consists of a weak acid and its salt: CH3COOH (aq) + CH3COONa (aq). An example of a buffer that consists of a weak base and its salt is a solution of ammonia and ammonium chloride: NH3 (aq) + NH4Cl...
164.3K
Buffer Systems in the Body01:19

Buffer Systems in the Body

852
Chemical buffers play a critical role in the body's regulation of pH levels. These systems contain one or more compounds that stabilize pH changes by neutralizing strong acids or bases. When pH levels drop, hydrogen ions bind to a weak base; when pH levels rise, hydrogen ions are released. This dynamic process helps maintain pH within a narrow and stable range essential for normal physiological function.
A typical buffer system in bodily fluids includes a weak acid and its corresponding...
852
Protein Buffers in Blood Plasma and Cells01:20

Protein Buffers in Blood Plasma and Cells

773
The human body utilizes protein buffer systems to maintain a stable pH. These systems capitalize on the dual role of amino acids, which can act as acids or bases by accepting or releasing hydrogen ions in response to pH changes. Protein buffer systems are particularly significant in the extracellular fluid (ECF) and intracellular fluid (ICF) of active cells, where structural and functional proteins provide substantial buffering capacity.
Certain amino acids can exist in a zwitterion state at a...
773
Buffers: Buffer Capacity01:09

Buffers: Buffer Capacity

1.3K
Buffer capacity is the quantitative measure of a buffer to resist the change in pH. As shown in the following equation, the buffer capacity, denoted by 'beta', is expressed as the number of moles of acid or base needed to change the pH of a one-liter buffer solution by 1 unit. Here, Ca and Cb indicate the number of moles of acid and base, respectively. Note that dpH represents the change in pH.
In the graph, pH is plotted as a function of the number of moles of base (Cb) added to a weak...
1.3K

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Analysis of Tubular Membrane Networks in Cardiac Myocytes from Atria and Ventricles
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Saturated buffers: Improvements and issues.

Emma E Eldridge1, Jon E Schoonover1, Karl W J Williard1

  • 1Department of Forestry, Southern Illinois University, Carbondale, Illinois, USA.

Journal of Environmental Quality
|February 13, 2024
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Summary
This summary is machine-generated.

Novel saturated buffers with pitchfork-shaped lines and check valves show potential for mitigating nutrient loss. While effective, design improvements like check valves can enhance flow diversion and nutrient removal in agricultural best management practices.

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Area of Science:

  • Agricultural best management practices
  • Water quality improvement
  • Nutrient management

Background:

  • Saturated buffers are a new practice to reduce nutrient runoff from agricultural tile drainage.
  • Eutrophication from nutrient losses remains a significant environmental concern.

Purpose of the Study:

  • To evaluate a novel saturated buffer design with pitchfork-shaped (PF) dispersion lines and a backflow check valve.
  • To compare the performance of the novel PF buffer against a standard (ST) saturated buffer.

Main Methods:

  • Installation of PF and ST saturated buffers in Moultrie County, Illinois.
  • Daily monitoring of water flow and collection of water samples to estimate nutrient loads.
  • Analysis of diversion rates and backflow occurrences over two observation periods.

Main Results:

  • The PF buffer diverted 35% and 1.9% of tile flow in 2020 and 2021, respectively.
  • The ST buffer increased effluent rates by 116% and 137% in 2020 and 2021.
  • Both buffer types experienced significant backflow (30-47%) exceeding typical levels.

Conclusions:

  • Saturated buffer efficacy can be improved with low-cost design additions.
  • Check valves enhance flow diversion and nutrient removal potential.
  • Dispersion lines increase diversion but require land and may increase backflow; cost-benefit analysis is needed.