Distribution and partitioning of iron, zinc, and arsenic in surface sediments in the Grande River mouth to Cuitzeo Lake, Mexico

2009 ◽  
Vol 166 (1-4) ◽  
pp. 331-346 ◽  
Author(s):  
Benjamín Villalobos-Castañeda ◽  
Ruth Alfaro-Cuevas ◽  
Raúl Cortés-Martínez ◽  
Verónica Martínez-Miranda ◽  
Liliana Márquez-Benavides
Keyword(s):  
Surface Sediments ◽  
River Mouth

Evaluation of the Status of Copper Contamination of Surface Sediments of Jen-Gen River Estuary, Taiwan

2013 ◽  
Vol 300-301 ◽  
pp. 1381-1384
Author(s):  
Cheng Di Dong ◽  
Yao Ting Tu ◽  
Chiu Wen Chen ◽  
Chih Ming Kao ◽  
Chih Feng Chen
Keyword(s):  
Municipal Wastewater ◽  
Surface Sediments ◽  
Biological Effects ◽  
Sediment Quality ◽  
River Estuary ◽  
River Mouth ◽  
Moderate Degree ◽  
River Bank ◽  
Biological Damage ◽  
Severe Degree

Major objectives of this study are to evaluation the enrichment, accumulation, and potential biological effects of copper (Cu) in the surface sediments of Jen-Gen River estuary, Taiwan. Eleven sampling locations were installed near the mouth of Jen-Gen River to collect sediment samples for analyzing Cu. Results of laboratory analyses show that concentrations of Cu in the sediments are between 67 and 278 mg/kg with an average of 181±61 mg/kg. The spatial distribution of Cu reveals that the Cu concentration is relatively high in the boundary of the river estuary. This indicates that upstream industrial and municipal wastewater discharges along the river bank are major sources of pollution. Results from the enrichment factor (EF) analysis imply that the sediments can be characterized as minor to moderately severe degree of Cu enrichment. Results of geo-accumulation index (Igeo) analysis indicate that the sediments can be characterized as none to moderate degree of Cu accumulation. Base on the comparison with sediment quality guidelines (SQGs), the concentrations of Cu in Jen-Gen River mouth sediments may cause acute biological damage.

Distribution and Contamination Evaluation of Lead in the Sediments of Northern Kaohsiung Harbor, Taiwan

2012 ◽  
Vol 178-181 ◽  
pp. 984-987
Author(s):  
Chiu Wen Chen ◽  
Chih Feng Chen ◽  
Cheng Di Dong
Keyword(s):  
Municipal Wastewater ◽  
Surface Sediments ◽  
River Mouth ◽  
Potential Ecological Risk ◽  
River Bank ◽  
Mouth Region ◽  
Accumulation Index ◽  
Severe Degree ◽  
Geo Accumulation Index ◽  
Geo Accumulation

The distribution, enrichment, accumulation, and potential ecological risk of lead (Pb) in the surface sediments of northern Kaohsiung Harbor, Taiwan were investigated. Results showed that the Pb concentrations varied from 10.9–73.2 mg/kg with an average of 42.1±19.1 mg/kg. The spatial distribution of Pb reveals that the Pb concentration is relatively high in the river mouth region, and gradually diminishes toward the harbor entrance region. This indicates that upstream industrial and municipal wastewater discharges along the river bank are major sources of Pb pollution. Results from the enrichment factor and geo-accumulation index analyses imply that the sediments collected from the river mouth can be characterized between severe and very severe degree enrichment and between moderately strong and strong to very strong accumulation of Pb, respectively.

scholarly journals KARAKTERISTIK DAN DISTRIBUSI LUMPUR SIDOARJO SEPANJANG SUNGAI, ESTUARI DAN PERAIRAN PORONG

2016 ◽  
Vol 11 (2) ◽  
pp. 91 ◽  
Author(s):  
Undang Hernawan ◽  
Kris Budiono
Keyword(s):  
Surface Sediments ◽  
River Mouth ◽  
Stream Sediments ◽  
Sem Analysis ◽  
Sea Surface ◽  
General Distribution ◽  
Sandy Sediment ◽  
Surrounding Water ◽  
Key Words Sediment ◽  
Materials Used

Semburan lumpur Sidoarjo (Lusi) di daerah Porong menambah fungsi Sungai Porong menjadi sarana untuk mengalirkan lumpur ke arah laut, karena kemampuan tanggul – tanggul penghalang di sekitar lokasi semburan sangat terbatas. Kondisi ini berdampak pula terhadap terbawanya lumpur lapindo ke perairan Porong. Penelitian ini bermaksud untuk mengetahui sebaran sedimen di sungai, muara dan perairan sekitar Porong terutama yang bersumber dari luapan lumpur Sidoarjo. Materi yang digunakan dalam penelitian ini adalah sebanyak 30 sampel sedimen hasil sampling yang diambil di lokasi sungai – muara sungai Porong dan 30 sampel sedimen permukaan dasar laut di perairan sekitar muara sungai Porong. Distribusi umum sebaran sedimen di perairan Porong menunjukkan sedimen lumpur ditemukan di pinggir sungai dan sedimen pasir ditemukan di bagian tengah sungai. Distribusi umum sedimen dasar perairan di sekitar muara Porong berupa pasir, lempung dan lempung lanau pasiran. Hasil analisis mikroskopik dan SEM menunjukkan bahwa sedimen yang berasal dari luapan lumpur Sidoarjo ditemukan di sepanjang aliran Sungai Porong sampai muara, namun belum ditemukan di perairan luar sekitar muara Porong. Sedimen Lusi yang sampai ke muara Porong berukuran butir sampai 2,5 mikron. Deskripsi megaskopis menunjukkan sedimen Lusi pasir - kerikil umumnya berbentuk pipih (halus– agak halus). Hasil SEM menunjukkan bahwa sedimen yang berasal dari lumpur Sidoarjo umumnya seragam dan didominasi berupa smectite. Berbeda dengan sedimen sungai, hasil SEM yang diperoleh dari sampel laut yang menunjukkan sedimennya beragam, berupa montmorilonite, kaolinite dan illite. Kata Kunci : Sedimen, Porong, lumpur Sidoarjo The Sidoarjo mudflow in the Porong area increases the functions of Porong River as media to drain the muds towards the sea, because the ability of embankments in the area as a barrier is very limited. This condition intends to determine the presence and distribution of sediment in rivers, estuaries and waters originating from the Lusi mudflow. The materials used in this study are the sediment sampling results as many as 30 samples taken from the river and off the river mouth and 30 samples of sea surface sediments in the surrounding waters. General distribution of sediments in the Porong River shows the form of mud sediments are generally found in the riverside and sandy sediment found in the middle of the river, while the distribution of sediments in waters Porong form of sand, clay and sandy silt clay. The results of microscopic and SEM analysis showed that the sediments derived from the Lusi mudflow found along Porong River till estuaries, but they have not reach surrounding water of Porong estuary. The Lusi sediment that reached the estuary Porong sized to 2.5 micron. General megascopic description show the shape of the Lusi sediment as sand-gravel is a flat-shaped (rounded - sub rounded). SEM results showed that the sediments derived from the Lusi is generally uniform and dominated by smectite. In contrast to stream sediments, the SEM results obtained from marine sediment samples show a variety of sediments, in the form of montmorillonite, caolinite and illite. Key words: Sediment, Porong, Sidoarjo, Mud Overflow (Lusi)

Evaluation of Mercury Contamination in Surface Sediments of Southern Kaohsiung Harbor, Taiwan

2013 ◽  
Vol 716 ◽  
pp. 459-464 ◽  
Author(s):  
Cheng Di Dong ◽  
Chih Feng Chen ◽  
Chiu Wen Chen
Keyword(s):  
Ecological Risk ◽  
Municipal Wastewater ◽  
Surface Sediments ◽  
Risk Index ◽  
River Mouth ◽  
Potential Ecological Risk ◽  
Mercury Contamination ◽  
River Bank ◽  
Accumulation Index ◽  
Severe Degree

Total mercury (T-Hg) concentration was determined to evaluation the distribution, enrichment, accumulation and potential ecological risk of mercury contamination in the surface sediments of southern Kaohsiung Harbor, Taiwan. Sediment samples from 12 locations located between the river mouths (i.e., Jen-Gen River and Salt River) and harbor entrance of southern Kaohsiung Harbor were collected and characterized for T-Hg, aluminum, water content, organic matter, and grain size. Results showed that the T-Hg concentrations varied from 0.190.45 mg/kg with an average of 0.28±0.09 mg/kg. The spatial distribution of T-Hg reveals is relatively high in the river mouth region, and gradually diminishes toward the harbor entrance region. This indicates that upstream industrial and municipal wastewater discharges along the river bank are major sources of Hg pollution; and Hg may drift with sea current to be dispersed into open sea. Results from the enrichment factor (EF) and geo-accumulation index (Igeo) analyses imply that the sediments can be characterized between moderate and moderately severe degree enrichment and between none to medium and moderate accumulation of Hg, respectively. Results of potential ecological risk index indicate that the sediment has higher to high ecological potential risk.

scholarly journals Microplastics in the surface sediments from the eastern waters of Java Sea, Indonesia

F1000Research ◽  
2019 ◽  
Vol 8 ◽  
pp. 98 ◽  
Author(s):  
Defri Yona ◽  
Syarifah Hikmah Julinda Sari ◽  
Feni Iranawati ◽  
Syamsul Bachri ◽  
Wulan Cahya Ayuningtyas
Keyword(s):  
Mangrove Forest ◽  
Surface Sediments ◽  
River Mouth ◽  
Plastic Pollution ◽  
Shrimp Pond ◽  
Industrial Activities ◽  
Mangrove Area ◽  
Open Sea ◽  
Java Sea ◽  
The Government

Background: This study aimed to investigate the abundance of microplastics in the eastern water of Java Sea. The study areas are well known for the high population and high industrial activities that can contribute to the plastic pollution. Methods: Microplastics were sampled from the surface sediments at five different stations representing different local activities: fish landing area (St 1), mangrove forest (St 2), abandoned shrimp pond (St 3), river mouth (St 4) and open sea (St 5). Results: Three types of microplastics were found; the most common was plastic fragments (54.34±6.39%) followed by fibers (41.45±4.59%) and films (4.21±3.90%). The highest abundance of microplastics was observed in the mangrove area (896.96±160.28 particles/kg), dominated with fragments and fibers. Films were found in greatest quantities in the fish landing area, but compared to the other types of microplastics, the abundance was much lower (80.73±37.62 particles/kg). Domestic wastes and fisheries activities were the main causes of the high microplastics in the study areas. Conclusions: The results of this study showed that microplastic pollution is a serious problem that needs to be paid attention not only from the government but also from the local people. Plastics management waste is needed.

scholarly journals Sandbar Formation in the Mesjid River Estuary, Rupat Strait, Riau Province, Indonesia

2017 ◽  
Vol 49 (1) ◽  
pp. 65
Author(s):  
Rifardi Rifardi ◽  
Yeeri Badrun
Keyword(s):  
Suspended Sediment ◽  
Surface Sediments ◽  
River Estuary ◽  
River Mouth ◽  
Bottom Surface ◽  
The Relationship

At the aim to clarify the relationship between the sandbar  formation and lithogeneous sediment discharges, the sedimentological aspects of the Mesjid River Estuary are revealed by various analysis. The samples of bottom surface sediments and the suspended sediment were collected at 50 stations in the estuary using grab and van dorm samplers. Oceanographic observation were also carried out  at the stations. The Mesjid River Estuary receives lithogeneous sediments mainly from the Mesjid River’s drainage areas which play important role on the formation of sandbar which is shown by  a belt-like area (0.5-1.0 m depth) in the area off the river mouth. The sandbar might become a sandbank in 20 to 40 years later. High suspended sediment up to 354.61 mg/l indicates the river mouth receives lithogeneous sediments. Total of 926  ton/day of the sediments supplied by the river are deposited 0.024 m/year into the area.

Distribution and Potential Ecological Risk Assessment of Copper in Surface Sediments of Southern Kaohsiung Harbor, Taiwan

2013 ◽  
Vol 811 ◽  
pp. 261-265
Author(s):  
Chiu Wen Chen ◽  
Chih Feng Chen ◽  
Cheng Di Dong
Keyword(s):  
Ecological Risk ◽  
Municipal Wastewater ◽  
Surface Sediments ◽  
Risk Index ◽  
River Mouth ◽  
Potential Ecological Risk ◽  
River Bank ◽  
Sampling Locations ◽  
Accumulation Index ◽  
Severe Degree

Major objectives of this study are to evaluation the enrichment, accumulation, and potential ecological risk of copper (Cu) in the surface sediments of southern Kaohsiung Harbor, Taiwan. Twelve sampling locations were installed of southern Kaohsiung Harbor to collect sediment samples for analyzing Cu. Results showed that the Cu concentrations varied from 6.0953 mg/kg with an average of 132±165 mg/kg. The spatial distribution of Cu reveals that the Cu concentration is relatively high in the river mouth region, and gradually diminishes toward the harbor entrance region. This indicates that upstream industrial and municipal wastewater discharges along the river bank are major sources of Cu pollution. Results from the enrichment factor and geo-accumulation index analyses imply that the sediments collected from the Salt River mouth can be characterized very severe degree enrichment and strong accumulation of Cu, respectively. Results of potential ecological risk index indicate that the sediment has low to higher ecological potential risk.

scholarly journals Carbon sources in suspended particles and surface sediments from the Beaufort Sea revealed by molecular lipid biomarkers and compound-specific isotope analysis

2013 ◽  
Vol 10 (3) ◽  
pp. 2061-2087 ◽  
Author(s):  
I. Tolosa ◽  
S. Fiorini ◽  
B. Gasser ◽  
J. Martín ◽  
J. C. Miquel
Keyword(s):  
Organic Matter ◽  
Surface Sediments ◽  
Isotope Analysis ◽  
River Mouth ◽  
Beaufort Sea ◽  
Lipid Biomarkers ◽  
Total Carbon ◽  
Compound Specific Isotope Analysis ◽  
Amundsen Gulf ◽  
Algal Material

Abstract. Molecular lipid biomarkers (hydrocarbons, alcohols, sterols and fatty acids) and compound-specific isotope analysis of suspended particulate organic matter (SPM) and surface sediments of the Mackenzie Shelf and slope (southeast Beaufort Sea, Arctic Ocean) were studied in summer 2009. The concentrations of the molecular lipid markers, characteristic of known organic matter sources, were grouped and used as proxies to evaluate the relative importance of fresh algal, detrital algal, fossil, C3 terrestrial plants, bacterial and zooplankton material in the organic matter (OM) of this area. Fossil and detrital algal contributions were the major fractions of the freshwater SPM from the Mackenzie River with ~34% each of the total molecular biomarkers. Fresh algal, C3 terrestrial, bacterial and zooplanktonic components represented much lower percentages, 17, 10, 4 and <1%, respectively. In marine SPM from the Mackenzie slope, the major contributions were fresh and detrital algal components (>80%), with a minor contribution of fossil and C3 terrestrial biomarkers. Characterization of the sediments revealed a major sink of refractory algal material mixed with some fresh algal material, fossil hydrocarbons and a small input of C3 terrestrial sources. In particular, the sediments from the shelf and at the mouth of the Amundsen Gulf presented the highest contribution of detrital algal material (60–75%), whereas those from the slope contained the highest proportion of fossil (40%) and C3 terrestrial plant material (10%). Overall, considering that the detrital algal material is marine derived, autochthonous sources contributed more than allochthonous sources to the OM lipid pool. Using the ratio of an allochthonous biomarker (normalized to total organic carbon, TOC) found in the sediments to those measured at the river mouth water, we estimated that the fraction of terrestrial material preserved in the sediments accounted for 30–40% of the total carbon in the inner shelf sediments, 17% in the outer shelf and Amundsen Gulf and up to 25% in the slope sediments. These estimates are low compared to other studies conducted 5–20 yr earlier, and they support the increase in primary production during the last decade mainly because of the increase in the number of ice-free days and due to the strength and persistence of winds favouring upwelling.

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