| Title |
Heavy metal accumulation during the last 30 years in the Karnaphuli River estuary, Chittagong, Bangladesh
|
|---|---|
| Published in |
SpringerPlus, December 2016
|
| DOI | 10.1186/s40064-016-3749-1 |
| Pubmed ID | |
| Authors |
Ai-jun Wang, Ahmed Kawser, Yong-hang Xu, Xiang Ye, Seema Rani, Ke-liang Chen |
| Abstract |
Heavy metal contamination of aquatic environment has attracted global attention owing to its abundance, persistence, and environmental toxicity, especially in developing countries like Bangladesh. Five heavy metals, namely chromium (Cr), copper (Cu), nickel (Ni), lead (Pb) and zinc (Zn) were investigated in surface and core sediments of the Karnaphuli River (KR) estuary in Chittagong, Bangladesh, in order to reveal the heavy metal contamination history in estuarine sediments and its response to catastrophic events and human activities. The surface sediment was predominantly composed of silt and sand, and the surface sediment was contaminated with Cr and Pb. Based on the (210)Pb chronology, the sedimentation rate in the inter-tidal zone of KR estuary was 1.02 cm/a before 2007, and 1.14 cm/a after 2008. The core sediment collected from 8 to 20 cm below the surface mainly originated from terrestrial materials induced by catastrophic events such as cyclone, heavy rainfall and landslides in 2007 and 2008. The values of contamination factor (CF) showed that the sediment became moderately contaminated with Cr and Pb in the last 30 years. The variation and accumulation of heavy metals in core sediment before 2000 was mainly related to natural variations in sediment sources; however, in subsequent years, the anthropogenic inputs of heavy metals have increased due to rapid physical growth of urban and industrial areas in the Chittagong city. In general, the accumulation pattern of heavy metals after normalization to Aluminum in sediments of KR estuary indicated an accelerated rate of urbanization and industrialization in the last 30 years, and also suggested the influence of natural catastrophic event on estuarine environment. |
Mendeley readers
The data shown below were compiled from readership statistics for 92 Mendeley readers of this research output. Click here to see the associated Mendeley record.
Geographical breakdown
| Country | Count | As % |
|---|---|---|
| Unknown | 92 | 100% |
Demographic breakdown
| Readers by professional status | Count | As % |
|---|---|---|
| Student > Bachelor | 12 | 13% |
| Student > Ph. D. Student | 8 | 9% |
| Student > Doctoral Student | 7 | 8% |
| Researcher | 6 | 7% |
| Student > Master | 4 | 4% |
| Other | 10 | 11% |
| Unknown | 45 | 49% |
| Readers by discipline | Count | As % |
|---|---|---|
| Environmental Science | 14 | 15% |
| Engineering | 9 | 10% |
| Earth and Planetary Sciences | 8 | 9% |
| Agricultural and Biological Sciences | 4 | 4% |
| Computer Science | 1 | 1% |
| Other | 6 | 7% |
| Unknown | 50 | 54% |
Attention Score in Context
This research output has an Altmetric Attention Score of 2. This is our high-level measure of the quality and quantity of online attention that it has received. This Attention Score, as well as the ranking and number of research outputs shown below, was calculated when the research output was last mentioned on 14 February 2017.
All research outputs
#13,495,562
of 22,912,409 outputs
Outputs from SpringerPlus
#694
of 1,850 outputs
Outputs of similar age
#210,542
of 419,596 outputs
Outputs of similar age from SpringerPlus
#34
of 65 outputs
Altmetric has tracked 22,912,409 research outputs across all sources so far. This one is in the 39th percentile – i.e., 39% of other outputs scored the same or lower than it.
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