Distribution of heavy metals in urban soils - a case study of Danang-Hoian Area (Vietnam)

Thủy, Hoàng Thị Thanh; Tobschall, H. J.; An, Pham Van

doi:10.1007/s002540050472

Cited by 66 publications

(47 citation statements)

References 6 publications

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“…The role of heavy and trace elements in the soil system is increasingly becoming an issue of global concern at private as well as governmental levels, especially as soil constitutes a crucial component of rural and urban environments [1], and can be considered as a very important "ecological crossroad" in the landscape [2]. Agricultural soil contamination with heavy metals through the repeated use of untreated or poorly treated wastewater from industrial establishments and application of chemical fertilizers and pesticides is one of the most severe ecological problems in Bangladesh.…”

Section: Introductionmentioning

confidence: 99%

Assessment of Heavy Metal Contamination of Agricultural Soil around Dhaka Export Processing Zone (DEPZ), Bangladesh: Implication of Seasonal Variation and Indices

et al. 2012

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Intense urbanization, large scale industrialization and unprecedented population growth in the last few decades have been responsible for lowering environmental quality. Soil contamination with metals is a serious concern due to their toxicity and ability to accumulate in the biota. The present work assessed the heavy metal contamination of agricultural soil in the close vicinity of the Dhaka Export Processing Zone (DEPZ) in both dry and wet seasons using different indices viz., index of geoaccumulation (I geo ), contamination factor (C ), degree of contamination (C ), modified degree of contamination (mC d ) and pollution load index (PLI). Samples were collected from the surface layer of soil and analyzed by Atomic Absorption Spectrophotometer (AAS). The trend of metals according to average concentration during the dry and wet seasons was As > Fe > Hg > Mn > Zn > Cu > Cr > Ni > Pb > Cd and As > Fe > Mn > Zn > Hg > Cu > Ni > Cr > Pb > Cd, respectively. Because of seasonal rainfall, dilution and other run-off during the wet season, metals from the upper layer of soil were flushed out to some extent and hence all the indices values were lower in this season compared to that of the dry season. I geo results revealed that the study area was strongly and moderately contaminated with As and Hg in the dry and wet seasons respectively. According to C , soil was classified as moderately contaminated with Zn, Cr, Pb and Ni, considerably contaminated with Cu and highly OPEN ACCESSAppl. Sci. 2012, 2 585 contaminated with As and Hg. The general trend of the mean C was Hg > As > Cu > Zn > Ni > Cr > Pb > Fe > Mn > Cd and As > Hg > Cu > Cd > Zn > Ni >Pb > Fe > Mn in dry and wet seasons, respectively. The mC f values in the dry and wet seasons were 575.13 and 244.44 respectively indicating an ultra high degree of contamination. The C d values in both seasons were associated with a very high degree of contamination. PLI results indicated immediate intervention to ameliorate pollution in both seasons. The main sources of metals included effluents from wastewater treatment plants, treated and untreated wastewater from surrounding industrial establishments as well as agricultural activities. Protecting the agricultural soil is a formidable challenge in the study area, which requires modernization of industries, thereby improving the recovery and recycling of wastewater. Indices analysis presented in the present work could serve as a landmark for contemporary research in toxicology.

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Section: Introductionmentioning

confidence: 99%

Assessment of Heavy Metal Contamination of Agricultural Soil around Dhaka Export Processing Zone (DEPZ), Bangladesh: Implication of Seasonal Variation and Indices

et al. 2012

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“…The sequential extraction technique has recently been widely used to gain a better understanding of geochemical processes by which heavy metals are fixed and remobilized (Hall et al 1996). Considering this fact, 2 g of soil samples were sequentially fractionated using the procedure given by Zeien and Brüm-mer (1989) to determine metal concentrations in different soil samples (Thuy et al 2000). Samples were then analyzed for the measured elements using ICP-MS at Canadian ALS Chemex Laboratories.…”

mentioning

confidence: 99%

Effect of Alteration Zones on Water Quality: A Case Study from Biga Peninsula, Turkey

Baba

Gündüz

2009

Arch Environ Contam Toxicol

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Widespread and intense zones of silicified, propylitic, and argillic alteration can be found in the Ç an volcanics of Biga Peninsula, northwest Turkey. Most of the springs in the study area surface out from the boundary between fractured aquifer (silicified zone) and impervious boundary (argillic zone). This study focuses on two such springs in Kirazlı area (Kirazlı and Balaban springs) with a distinct quality pattern. Accordingly, field parameters (temperature, pH, and electrical conductivity), major anion and cation (sodium, potassium, calcium, magnesium, chloride, bicarbonate, and sulfate), heavy metals (aluminum, arsenic, barium, chromium, cobalt, cupper, iron, lithium, manganese, nickel, lead, and zinc), and isotopes (oxygen-18, deuterium, and tritium) were determined in water samples taken from these springs during 2005 through 2007. The chemical analyses showed that aluminum concentrations were found to be two orders of magnitude greater in Kirazlı waters (mean value 13813.25 lg/L). The levels of this element exceeded the maximum allowable limits given in national and international standards for drinking-water quality. In addition, Balaban and Kirazlı springs are [55 years old according to their tritium levels; Kirazlı spring is older than Balaban spring. Kirazlı spring is also more enriched than Balaban spring based in oxygen-18 and deuterium values. Furthermore, Kirazlı spring water has been in contact with altered rocks longer than Balaban spring water, according to its relatively high chloride and electrical conductivity values.Water-rock interaction is an important topic influencing the water quality as well as human health. Particularly in altered systems, these interactions are more important for local inhabitants using water for drinking purposes because the water in such systems might contain increased levels of certain elements that are potentially detrimental to human health. Thus, these interactions should be assessed carefully in areas of complex geology where rocks formed as a result of hydrothermal system are predominant.Hydrothermal fluids carry metals in solution, coming either from a nearby igneous source, from leaching of subsurface rocks, or both (Henley et al. 1984). These fluids then alter other rocks, changing their mineralogy and chemical composition (Nicholson 1993;Verma et al. 2005;Pandarinath et al. 2008). Complex zoned alteration patterns have been well documented from a large number of important hydrothermal ore deposit types, including submarine-volcanogenic massive sulphide (Finlow-Bates and

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“…However, the loss of habitat to intensive rice cultivation and urban areas has increased dramatically as the human population of Vietnam has grown tremendously in the 20th century (Sterling et al 2006). The area between Da Nang and Hoi An is now a major socioeconomic center of Vietnam (Thuy et al 2000) and Da Nang is currently one of the largest, most highly urbanized, and most densely populated Vietnamese cities (Da Nang Urban Environment Company 2003; Sterling et al 2006). Many watercourses in the area have been substantially impacted by channelization, filling of low-lying areas, and draining of wetlands (Da Nang Urban Environment Company 2003).…”

Section: Conservation Biology Of Freshwater Turtles and Tortoises • Cmentioning

confidence: 99%

“…The margins of the marshes supported ferns, sedges, and grasses, with the surrounding upland habitat consisting of bamboo stands, leading to xeric herbs and shrubs in higher areas (Floore et al 1971). Most of this lowland habitat has now been converted to agriculture and urban areas (Thuy et al 2000) and M. annamensis currently appears restricted to ponds and fragmented wetlands scattered among rice fields and along riparian corridors (McCormack 2013).…”

Section: Conservation Biology Of Freshwater Turtles and Tortoisesmentioning

confidence: 99%

Mauremys annamensis (Siebenrock 1903) – Vietnamese Pond Turtle, Annam Pond Turtle, Rùa Trung Bộ.

McCormack¹,

Dawson²,

Hendrie³

et al. 2014

Chelonian Research Monographs

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]; 8 Deceased summary. -The Vietnamese Pond Turtle, Mauremys annamensis (Family Geoemydidae), is a medium-sized (carapace length to 285 mm in females, 232 mm in males), highly aquatic turtle known only from the lowland wetlands of central Vietnam. Field records are limited and the natural history of M. annamensis is poorly known, in part due to the difficulty in conducting research within the species' native range as a result of conflict and political isolation during much of the period since its description. Recent work has delimited the historical distribution and gathered evidence for the historical abundance of M. annamensis, but also indicates that the species has largely been extirpated across its range and is now extremely rare in the wild. Over-collection and habitat loss are the greatest contributors to the species' decline, while pollution and interspecific hybridization may represent additional threats. Substantial international trade in M. annamensis occurred in the past, and despite national and international protection for the species, surviving populations continue to be threatened by intensive collection efforts. In captivity, the species acclimates well and breeds readily, with females capable of producing several clutches of eggs per year. Current conservation efforts include greater enforcement of trade restrictions, the establishment of a protected habitat area, and planning for future reintroductions from captive stocks. Continued research and conservation measures are required to save this critically endangered species.

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Distribution of heavy metals in urban soils - a case study of Danang-Hoian Area (Vietnam)

Cited by 66 publications

References 6 publications

Assessment of Heavy Metal Contamination of Agricultural Soil around Dhaka Export Processing Zone (DEPZ), Bangladesh: Implication of Seasonal Variation and Indices

Assessment of Heavy Metal Contamination of Agricultural Soil around Dhaka Export Processing Zone (DEPZ), Bangladesh: Implication of Seasonal Variation and Indices

Effect of Alteration Zones on Water Quality: A Case Study from Biga Peninsula, Turkey

Mauremys annamensis (Siebenrock 1903) – Vietnamese Pond Turtle, Annam Pond Turtle, Rùa Trung Bộ.

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