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Related Concept Videos

Quality of Water01:19

Quality of Water

516
In concrete preparation, the quality of water is paramount as it affects the strength and durability of the concrete. Potable water is usually preferred; however, it must not have excessive sodium or potassium to prevent compromising the concrete's integrity. Water quality is typically evaluated based on impurities such as dissolved solids, chlorides, and sulfates, and its pH value is ideally between 6 and 8. Even slightly acidic natural water may be acceptable unless it contains harmful...
516
Testing Water Quality01:14

Testing Water Quality

381
When the quality of water for concrete preparation is uncertain, its impact on the setting time of cement and compressive strength of mortar is assessed by comparison with de-ionized or distilled water benchmarks. American Society for Testing and Materials (ASTM) C1602 requires the setting times to be within 90 minutes of the control, British Standard (BS) 3146:1980 allows a 30-minute variance in the initial setting, while British Standards European Norm (BS EN) 1008 specifies initial setting...
381
Buffers02:56

Buffers

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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...
172.6K
The Soil Ecosystem02:23

The Soil Ecosystem

24.6K
Plants obtain inorganic minerals and water from the soil, which acts as a natural medium for land plants. The composition and quality of soil depend not only on the chemical constituents but also on the presence of living organisms. In general, soils contain three major components:
24.6K
Buffers: Buffer Capacity01:09

Buffers: Buffer Capacity

2.2K
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...
2.2K
Buffer Effectiveness02:19

Buffer Effectiveness

55.0K
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...
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Related Experiment Video

Updated: Jan 26, 2026

Integrated Field Lysimetry and Porewater Sampling for Evaluation of Chemical Mobility in Soils and Established Vegetation
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Giant Cane Vegetative Buffer for Improving Soil and Surface Water Quality.

Gurbir Singh, Jon E Schoonover, Karl W J Williard

    Journal of Environmental Quality
    |April 6, 2019
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    Summary
    This summary is machine-generated.

    Giant cane (Arundo donax) and grass buffers effectively reduce nutrient and sediment runoff. Giant cane demonstrated superior infiltration rates, proving its utility in improving agricultural water quality.

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    Area of Science:

    • Environmental Science
    • Agricultural Science
    • Water Quality Management

    Background:

    • Riparian buffers are crucial for mitigating agricultural runoff.
    • Grasses are commonly used in buffers, but giant cane's effectiveness is understudied.
    • Nutrient and sediment pollution from agriculture impacts water bodies.

    Purpose of the Study:

    • To evaluate giant cane's efficacy in improving agricultural runoff quality.
    • To compare giant cane buffer performance against Kentucky bluegrass, orchardgrass, and bare ground.
    • To assess the impact of different buffer types on nutrient and sediment levels.

    Main Methods:

    • Vegetative buffer plots were established with giant cane, Kentucky bluegrass, and orchardgrass.
    • Runoff quality was monitored from these plots, alongside continuous corn and bare-ground controls.
    • Infiltration rates and nutrient concentrations (dissolved reactive P, total P) were measured.

    Main Results:

    • Giant cane exhibited significantly higher infiltration rates than all other treatments.
    • Corn treatment showed the highest total phosphorus concentration in runoff.
    • Giant cane, Kentucky bluegrass, and orchardgrass significantly reduced total phosphorus compared to corn and bare ground.

    Conclusions:

    • Giant cane is a viable and effective option for vegetated riparian buffers.
    • This study highlights giant cane's potential to reduce nutrient and sediment loads in agricultural runoff.
    • Implementing giant cane buffers can contribute to improved surface water quality.