Heavy metals in sediments of two Chesapeake Bay tributaries — Wicomico and Pocomoke Rivers

Gupta, Gian; Karuppiah, Makesh

doi:10.1016/0304-3894(96)01773-6

Cited by 22 publications

(8 citation statements)

References 16 publications

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“…Jarvie et al (2002) reported the high levels of ammonia concentrations indicate multiple sources sewage and agricultural runoffs. Gupta and Karuppiah (1996) has reported high concentration of ammonia present in rivers indicates recent pollution. In rural areas both point and nonpoint sources are important sources for ammonia and nitrates.…”

Section: Spatial Variationsmentioning

confidence: 97%

Spatial–temporal variation and comparative assessment of water qualities of urban river system: a case study of the river Bagmati (Nepal)

Kannel

Lee

Kanel

et al. 2007

Environ Monit Assess

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The study presents the assessment of variation of water qualities, classification of monitoring networks and detection of pollution sources along the Bagmati River and its tributaries in the Kathmandu valley of Nepal. Seventeen stations, monitored for 23 physical and chemical parameters in pre-monsoon, monsoon, post-monsoon and winter seasons, during the period 1999-2003, were selected for the purpose of this study. The study revealed that the upstream river water qualities in the rural areas were increasingly affected from human sewage and chemical fertilizers. In downstream urban areas, the river was heavily polluted with untreated municipal sewage. The contribution of industries to pollute the river was minimal. The higher ratio of COD to BOD (3.74 in the rural and 2.06 in the urban) confirmed the increased industrial activities in the rural areas. An increasing trend of nitrate was found in the rural areas. In the urban areas, increasing trend of phosphorus was detected. The water quality measurement in the study period showed that DO was below 4 mg/l and BOD, COD, TIN, TP and TSS above 39.1, 59.2, 10.1, 0.84 and 199 mg/l, respectively, in the urban areas. In the rural areas, DO was above 6.2 mg/l and BOD, COD, TIN, TP and TSS below 15.9, 31, 5.24, 0.41 and 134.5 mg/l, respectively. The analysis for data from 1988 to 2003 at a key station in the river revealed that BOD was increasing at a rate of 1.8 mg/l in the Bagmati River. A comparative study for the water quality variables in the urban areas showed that the main river and its tributaries were equally polluted. The other comparison showed the urban water qualities were significantly poor as compared with rural. The cluster analysis detected three distinct monitoring groups: (1) low water pollution region, (2) medium water pollution region, (3) heavy water pollution region. For rapid assessment of water qualities using the representative sites could serve to optimize cost and time without loosing any significance of the outcome. The factor analysis revealed distinct groups of sources and pollutions (organics, nutrients, solutes and physicochemical).

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Section: Spatial Variationsmentioning

confidence: 97%

Spatial–temporal variation and comparative assessment of water qualities of urban river system: a case study of the river Bagmati (Nepal)

Kannel

Lee

Kanel

et al. 2007

Environ Monit Assess

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“…Meanwhile, discharge from the Dan'ao River and a nearby industrial area was proposed as another source of these metals. The concentrations of As, Zn, Pb, and Cu in sediments are often closely related to waste discharge from outlets [56]. There were dozens of outlets distributed along the coast of Daya Bay.…”

Section: Source Apportionment Of Hmsmentioning

confidence: 99%

Characteristics of Heavy Metals in Seawater and Sediments from Daya Bay (South China): Environmental Fates, Source Apportionment and Ecological Risks

Tao

Peng

et al. 2021

Sustainability

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In this study, the spatiotemporal distributions, potential sources, and ecological risks of Hg, Cr, and As in seawater, and Hg, As, Zn, Cd, Pb, and Cu in sediments from Daya Bay were investigated. The five-year average concentrations of Hg, Cr, and As in seawater were 0.020 μg/L, 0.79 μg/L, and 2.08 μg/L, respectively. The five-year average concentrations of Hg, As, Zn, Cd, Pb, and Cu in surface sediments were 0.04 mg/kg, 7.34 mg/kg, 63.81 mg/kg, 0.23 mg/kg, 25.60 mg/kg, and 11.78 mg/kg, respectively. Annual variations in Hg, Cr, and As in seawater exhibited different trends. HMs in sediments, such as As, Zn, Pb, and Cu, exhibited similar annual variations, whereas Hg and Cd exhibited different annual variations. The spatial distribution of metal species in seawater and sediments showed significant variability, and the concentrations decreased gradually from the coast to the open sea. The comprehensive potential ecological hazard index (RI) of HMs in sediments indicated a relatively high risk, especially for Hg and Cd contamination. The geoaccumulation indices (Igeo) of As, Zn, Pb, and Cu suggested that these metals did not pollute Daya Bay, whereas those of Cd and Hg indicated mild and moderate pollution. The environmental fates of HMs were discussed based on Pearson correlation analysis, revealing that concentrations of HMs were greatly affected by parameters, such as pH, salinity, dissolved oxygen (DO), and total organic carbon (TOC). Principal component and factor analyses indicated that Hg, Cr, As, and dissolved inorganic nitrogen (DIN) in water originated from similar sources, including domestic sewage and wastewater from fishing ports, runoffs, and outlets. For sediments, it was proposed that Cu, Zn, As, Pb, and TOC exhibited similar sources, including cage culture and waste discharge from outlets. Meanwhile, Hg and Cd originated from other point sources, such as a harbor. The study suggests that sustainable management and economic development be integrated to control pollutant emissions in Daya Bay.

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“…Many investigations relate to the migration of elements in solid wastes and adjacent soil, in surface water, in ground deposits, and other environmental components (Zyrina 1985;Blowes and Jambor 1990a, b;De Vos et al 1995;Seal and Hammarstrom 2003;Routh 1985;Tsareva et al 1999;Hakansson et al 1989;Task et al 1996;Gupta and Karuppiah 1996;etc.). The majority of these studies provide information on the total element concentrations but not of their behavior.…”

Section: Introductionmentioning

confidence: 97%

Behavior of heavy metals in sulfide mine tailings and bottom sediment (Salair, Kemerovo region, Russia)

Bogush

Лазарева

2011

Environ Earth Sci

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The given work focused on solving the problem of environmental geochemistry related to investigation of element speciation, their mobility, and migration in polluted areas. The purpose was to describe quantitatively migration, distribution, and redistribution of heavy metals by the example of the old tailings (Talmovaya sands) of the Lead Zinc Concentration Plant (Salair, Kemerovo region, Russia) and technogenic bottom sediments of the Malaya Talmovaya river. Contents of elements in the sulfide tailings range in the following limits: Zn: 1,100-27,000 ppm, Cd: 1.3-240 ppm, Pb: 0.01-0.81 ppm, Cu: 220-960 ppm, As: 15-970 ppm, Fe: 19,000-76,000 ppm, and Ba: 80,000-1,00,000 ppm. Element concentrations in the river sediment are proportional to the element contents in the sulfide tailings. Element speciations in the sulfide tailings and technogenic bottom sediments were investigated by the modified sequential extraction procedure. Chemical forms of heavy metals in pore water and surface water were calculated by WATEQ4F software. Principles of heavy metal migration in the sulfide tailings and technogenic bottom deposits were established. The obtained results about element species in the sulfide tailings and sediment explain the main principles of element migration and redeposition. In the mine waste and technogenic bottom deposits, there is vertical substance transformation with formation of geochemical barriers.

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Heavy metals in sediments of two Chesapeake Bay tributaries — Wicomico and Pocomoke Rivers

Cited by 22 publications

References 16 publications

Spatial–temporal variation and comparative assessment of water qualities of urban river system: a case study of the river Bagmati (Nepal)

Spatial–temporal variation and comparative assessment of water qualities of urban river system: a case study of the river Bagmati (Nepal)

Characteristics of Heavy Metals in Seawater and Sediments from Daya Bay (South China): Environmental Fates, Source Apportionment and Ecological Risks

Behavior of heavy metals in sulfide mine tailings and bottom sediment (Salair, Kemerovo region, Russia)

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