Degradation of aniline in groundwater by persulfate with natural subsurface sediment as the activator

Penelitian Lingkungan dan Kebencanaan Geologi Kelautan Perairan Teluk Jakarta (Tanjung Kait â€“ Muara Gembong) dilakukan pada bulan Oktober - November 2010. Uji logam berat (Cu, Pb, Zn, Cd, dan Cr) dilakukan terhadap 28 contoh air laut dan 28 contoh sedimen dasar laut menggunakan metoda Atomic Absorption Spectrophotometry (AAS). Tujuan penelitian ini adalah untuk mendapatkan data dan informasi kondisi lingkungan terkini dari kandungan logam berat dalam air laut dan sedimen dasar laut. Kandungan logam berat (air laut dalam mg/l : sedimen dasar laut dalam ppm) terukur sebagai berikut : Cu ( <0.005 : 15.000-169.500 ); Pb (0.005-0.011 : 14.000-58.100); Zn (0.005-0.007 : 95.800-333.000); Cd (0.006-0.015 : 0.012-0.750); Cr (<0.001 : 45.320-139.180). Berdasarkan Metode Storet dapat dilihat nilai status mutu air laut perairan ini adalah -12, berarti bahwa kualitas air laut di perairan termasuk kelas C (tercemar sedang). Sedangkan status mutu sedimen di perairan menunjukkan skor nilai status mutu sedimen adalah 0, yang berarti bahwa kualitas sedimen termasuk kelas A (tidak tercemar/memenuhi baku mutu). Jelas terlihat bahwa nilai ambang batas (NAB) logam berat dalam sedimen jauh lebih tinggi dari NAB logam berat dalam air. Kata kunci: logam berat, sedimen dasar laut, air laut, nilai status mutu Marine Environmental and Geological Hazard Survey In Jakarta Bay Waters (Tanjung Kait - Muara Gembong) conducted in October-November 2010. Testing of heavy metals (Cu, Pb, Zn, Cd, and Cr) performed on 28 samples of sea water and 28 subsurface sediment samples using the method of Atomic Absorption Spectrophotometry (AAS). The purpose of this study was to obtain data and information on current environmental conditions of heavy metal content in seawater and subsurface sediment. Heavy metal content (sea water in mg/l: subsurface sediment in ppm) measured as follows: Cu ( <0.005 : 15.000-169.500 ); Pb (0.005-0.011 : 14.000-58.100); Zn (0.005-0.007 : 95.800-333.000); Cd (0.006-0.015 : 0.012-0.750); Cr (<0.001 : 45.320-139.180). Based on the Storet method shows the value of water quality status of sea waters is -12, which means that the seawater quality in these waters belong to a class C (medium contaminated). While the status of sediment quality in these waters indicate subsurface sediment quality score status value is 0, which means that subsurface sediment quality belongs to the class A (not polluted/correspond to the quality standards). It is clearly seen that the threshold value (NAV) of heavy metals in sediments is much higher than the NAV of heavy metals in water. Keywords: heavy metal, subsurface sediment, seawater, quality score status

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Subsurface sediment profiles below Point Pelee: indicators of postglacial evolution in western Lake Erie

Canadian Journal of Earth Sciences ◽

10.1139/e97-090 ◽

1998 ◽

Vol 35 (1) ◽

pp. 88-99

Author(s):

John P Coakley ◽

Allan S Crowe ◽

Patrice A Huddart

Keyword(s):

Lake Levels ◽

Dune Sand ◽

Radiocarbon Dates ◽

Subsurface Sediment ◽

Fine Grained ◽

Western Lake ◽

Planar Wave ◽

Point Pelee ◽

Sediment Data ◽

Point Pelee National Park

An extensive drilling program, undertaken along the western barrier bar at Point Pelee National Park, Ontario, Canada, yielded considerable subsurface sediment data relevant to the nature and lateral geometry of sedimentary units below the Point Pelee foreland. Four major sedimentary units were identified: a basal clay-rich till, a fine-grained glaciolacustrine sand, a medium-grained sand unit (subdivided into a poorly sorted shoreface sand and an aeolian (dune) sand derived from the shoreface sand), and an organic marsh (gyttja) deposit. The present study confirms the existence of a planar, wave-eroded till surface below the southern portion of Point Pelee at an elevation of approximately 164 m asl. Following this low-water period in the basin, lake levels rose abruptly to an elevation several metres above 172 m asl. This resulted in erosion of the upper part of the glaciolacustrine sand during a later period of stable higher lake levels, perhaps coinciding with the Nipissing flood event (about 4000 BP). This resulted in a planar surface at approximately 169.5 m asl. Several radiocarbon dates on basal gyttja from the marsh (averaging 3200 BP) reflect a subsequent drop in levels to about 2-3 m below present levels. Though undated, the initiation of shoreface and dune sand deposition is roughly coeval with the basal marsh deposits.

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The Relationship Between Modern Mollusk Assemblages and Their Expression in Subsurface Sediment in a Carbonate Lagoon, St. Croix, US Virgin Islands

Topics in Geobiology - Experimental Approaches to Understanding Fossil Organisms ◽

10.1007/978-94-017-8721-5_7 ◽

2014 ◽

pp. 143-167 ◽

Cited By ~ 4

Author(s):

Karla Parsons-Hubbard ◽

Dennis Hubbard ◽

Caitlin Tems ◽

Ashley Burkett

Keyword(s):

Virgin Islands ◽

Us Virgin Islands ◽

Subsurface Sediment ◽

The Relationship ◽

Mollusk Assemblages

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Microbial Diversity and Function in Shallow Subsurface Sediment and Oceanic Lithosphere of the Atlantis Massif

mBio ◽

10.1128/mbio.00490-21 ◽

2021 ◽

Author(s):

J. Goordial ◽

T. D’Angelo ◽

J. M. Labonté ◽

N. J. Poulton ◽

J. M. Brown ◽

...

Keyword(s):

Microbial Diversity ◽

Oceanic Lithosphere ◽

Global Scale ◽

Nutrient Cycles ◽

Subsurface Sediment ◽

Shallow Subsurface ◽

Low Concentrations ◽

Atlantis Massif ◽

And Function

The subsurface rock beneath the ocean is one of the largest biospheres on Earth, and microorganisms within influence global-scale nutrient cycles. This biosphere is difficult to study, in part due to the low concentrations of microorganisms that inhabit the vast volume of the marine lithosphere.

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