Spatial and Temporal Variation of Heavy Metals in Atmospheric Aerosol of Delhi

2004 ◽  
Vol 90 (1-3) ◽  
pp. 1-21 ◽  
Author(s):  
P. S. Khillare ◽  
S. Balachandran ◽  
Bharat Raj Meena
Keyword(s):  
Heavy Metals ◽  
Temporal Variation ◽  
Atmospheric Aerosol ◽  
Spatial And Temporal Variation

scholarly journals Spatial and temporal variation of dissolved heavy metals in the Lijiang River China: Implication of rainstorm on drinking water quality

2021 ◽  
Author(s):  
Liming Deng ◽  
Asfandyar Shahab ◽  
He Xiao ◽  
Jieyue Li ◽  
Saeed Rad ◽  
...  
Keyword(s):  
Heavy Metals ◽  
Water Quality ◽  
Drinking Water ◽  
Health Risk ◽  
Temporal Variation ◽  
High Flow ◽  
Anthropogenic Sources ◽  
Spatial And Temporal Variation ◽  
Lijiang River ◽  
Dissolved Heavy Metals

Abstract Lijiang River is an essential drinking water source and natural scenery in the Guilin City. For the first time, implications of rainstorm were taken into consideration by investigating spatial and temporal variation of dissolved heavy metals (HMs) in the Lijiang River water. A total of 68 water samples were collected during low flow (normal) season and high flow (rainstorm) season from 34 sampling sites. Dissolved HMs including Cr, Mn, Co, Cu, Zn, As, Cd, Sb, and Pb were found to meet the respective drinking water standards, while higher concentration was observed after the rainstorm season, except for Cr. Multivariate statistical analysis showed Co, Cu, Cr, Zn, Sb, and Pb in normal season are mainly controlled by anthropogenic sources. Furthermore, higher concentration of Mn, Cu, Cd, Pb, Co and Zn during the high flow season is attributed to rainstorm. The water quality index (WQI) showed good grades, and comparatively lower in rainstorm season. The results of health risk assessment revealed that HMs in Lijiang River pose limited health risk, however, As poses potential health risk during rainstorm season. It is suggested to adopt preventive measures in mining activities and industrial waste-water discharge at the river’s upstream and downstream.

Spatial and temporal variation of heavy metals in a tropical estuary

2002 ◽  
Vol 42 (6) ◽  
pp. 575-582 ◽  
Author(s):  
Bahena-Manjarrez J. ◽  
Rosales-Hoz L. ◽  
Carranza-Edwards A.
Keyword(s):  
Heavy Metals ◽  
Temporal Variation ◽  
Spatial And Temporal Variation ◽  
Tropical Estuary

scholarly journals Spatial and temporal variation of the nutrients in the sediment and leaves of two Brazilian mangrove species and their role in the retention of environmental heavy metals

2010 ◽  
Vol 22 (3) ◽  
pp. 177-187 ◽  
Author(s):  
Elaine Bernini ◽  
Maria A. B. da Silva ◽  
Tania M. S. do Carmo ◽  
Geraldo R. F. Cuzzuol
Keyword(s):  
Heavy Metals ◽  
Temporal Variation ◽  
Rainy Season ◽  
Significant Variation ◽  
Seasonal Pattern ◽  
Spatial And Temporal Variation ◽  
Nutrient Concentrations ◽  
Laguncularia Racemosa ◽  
Mangrove Species

Spatial and temporal variation of the nutrient concentrations in leaves and sediment between the roots of Laguncularia racemosa (L.) Gaertn. f and Rhizophora mangle L. was analyzed in the mangrove forest of the estuary of São Mateus River, Espírito Santo, Brazil. In leaves, the nutrients followed the sequence: N> Ca> K> Mg> S> P> Fe> Mn> Zn> Cu, and there were significant differences between species and sites studied. In general, the levels of K were higher in the dry season compared to the rainy season for both species analyzed while Ca and Cu showed higher concentrations in the rainy season for Laguncularia racemosa. In the sediment, the nutrients followed the sequence: Mg> Ca> Fe> K> Mn> P> Zn> Cu, in general, with lower concentrations at the site where the sediment was sandier. We observed a significant variation of nutrient concentrations in the sediment between the periods analyzed, but the seasonal pattern was not clear for all nutrients. Nutrient concentration profile found in leaves of both plant species was not correlated with concentrations found in the respective sediments. The concentration factor was less than 1.0 for Fe and between 1.0 and 3.7 for Mn, Zn and Cu. These results provide physiological evidences about the relevance of these tree species for the role of mangroves as biogeochemical barriers to the transit of heavy metals.

Spatial and Temporal Variation on Heavy Metals in the Sediments of Dapeng Bay and Neighboring Rivers

2013 ◽  
Vol 726-731 ◽  
pp. 1378-1382
Author(s):  
Shih Chieh Chen ◽  
Wen Liang Lai ◽  
Chung Yi Chung ◽  
Hwa Sheng Gau ◽  
Shao Wei Liao
Keyword(s):  
Heavy Metals ◽  
Heavy Metal ◽  
Temporal Variation ◽  
Operative Management ◽  
Spatial And Temporal Variation ◽  
Typhoon Morakot ◽  
Habitat Recovery ◽  
Southern Taiwan ◽  
The Impact ◽  
Dapeng Bay

The Typhoon Morakot raged through Taiwan bringing torrential rain for two days, which led to debris-flow in mountains and severe flooding in the coastal areas of southern Taiwan. In order to realize the impact of the Typhoon Morakot on heavy metals in the sediments this research discriminate the pollution brought from three neighboring rivers to the Dapeng Bay lagoon by using the R. A. Fisher Method. The results generally indicate that the samples from Dapeng Bay and the three neighboring rivers are displaying individual crowd-distribution phenomena, which means that the heavy metal content in the sediments of Dapeng Bay and the three neighboring rivers are not totally similar. Today, due to a massive variation in eco-habitat and a more frequently changing climate, the understanding of spatial-temporal variation of heavy metal pollution of sediments in Dapeng Bay and pollution sources from three neighboring rivers will provide useful information regarding disaster management, habitat recovery, operative management, as well as ecotourism specification.

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