Model Persamaan Faktor Koreksi pada Proses Sedimentasi dalam Keadaan Free Settling

Roessiana, D L; Setiyadi, Setiyadi; Bh, Sandy

doi:10.20885/jstl.vol6.iss2.art3

Cited by 2 publications

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“…The SV of fall is presented in a graph as a function of time vs. settling velocity of fall. The relationship that is seen is that the longer the experiment time the slower the grain SV, so that it takes a long time to get the sedimentation results until the deposition process stops [18]. The maximum SV calculated is in the first interval, which is between the 1st to 4th minute time span with a large settling velocity ranging from 0.75 mm/minute -3 mm/minute.…”

Section: Resultsmentioning

confidence: 95%

Influence of Salinity Levels Analysis on Settling Velocity of Fine Sediment Grains in Ciliwung Estuary

Sari

Yatmadi²,

Martdianto³

et al. 2022

LOGIC

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Transport of estuarine sediment have a highly complex method, which is the combined effects result of periodically reciprocating flow, ocean waves, and the electrochemical characteristic of sea water [1]. Settling velocity (SV) is such a parameter fundamental for sediment researchers so that its accurate resolution has been regarded as a top priority in correcting modelling numerical and conceptual understanding of fine sediment dynamics [2] [3]. The goal of this study is to analyze the effect of salinity levels on the settling velocity of fine sediment grains in the Ciliwung estuary, Jakarta. The method used is direct measurement using the hydrometer analysis method. The result of experiment shows salinity levels affect the settling velocity of fine sediment grains in the Ciliwung estuary. The higher salinity, more faster the settling velocity of fine sediment grains. The average settling velocity at distilled water salinity 0 ppt is 1.083 mm/minute, sea water with salinity 0.3 ppt is 1.537 mm/minute, and sea water with salinity of 0.6 ppt of 1.561 mm/minute.

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Section: Resultsmentioning

confidence: 95%

Influence of Salinity Levels Analysis on Settling Velocity of Fine Sediment Grains in Ciliwung Estuary

Sari

Yatmadi²,

Martdianto³

et al. 2022

LOGIC

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“…Sediment is formed through a sedimentation process. Sedimentation is a process of deposition of solids in liquids due to the force of gravity [5]. Sediment at the lake's bottom accumulates from various sources, such as river flows [6].…”

Section: Introductionmentioning

confidence: 99%

Identification of Elemental Composition and Heavy Metal Content in Maninjau Lake Sediment Using X-Ray Fluorescence (MNJ 18-41B)

Akmal

Rifai

Syafriani

et al. 2021

JPSE

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Maninjau Lake is a caldera lake located in Agam, West Sumatra. This lake was formed from the volcanic activity of Mount Maninjau Purba about 60,000 years ago. The volcanic material resulting from the eruption is scattered and deposited in various places, one of which is in lake sediments. Volcanic ash contains various types of elements, including heavy metal elements. This study aims to determine the composition and content of heavy metal in the sediments of Maninjau Lake. The sample analyzed was MNJ 18-41B with a core length of 440 mm, focusing on specimens 148 mm and 376 mm. The selection is a specimen based on the magnetic susceptibility value obtained from the measurement meter susceptibility of the MS2E. Specimen 148 has a value susceptibility low of 2.1 × 10-8 m3/kg, while the 376 specimens have the highest value of susceptibility, the highest 141 × 10-8 m3/kg. The content of sediment elements was determined using the results of X-Ray Fluorescence (XRF) measurements. The measurement results showed that the mineral-forming elements in the sediments of Lake Maninjau were dominated by Si, Fe, Rh, and Zr. In contrast, the highest heavy metal elements are Mn, Fe, Sr, and Rh. Based on the elemental composition and mineral oxide compounds in the sediments of Lake Maninjau derived from volcanic ash.

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Model Persamaan Faktor Koreksi pada Proses Sedimentasi dalam Keadaan Free Settling

Cited by 2 publications

References 0 publications

Influence of Salinity Levels Analysis on Settling Velocity of Fine Sediment Grains in Ciliwung Estuary

Influence of Salinity Levels Analysis on Settling Velocity of Fine Sediment Grains in Ciliwung Estuary

Identification of Elemental Composition and Heavy Metal Content in Maninjau Lake Sediment Using X-Ray Fluorescence (MNJ 18-41B)

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