A RetroSearch Logo

Home - News ( United States | United Kingdom | Italy | Germany ) - Football scores

Search Query:

Showing content from https://link.springer.com/doi/10.1007/s00254-005-1248-8 below:

Present environment and historic changes from the record of lake sediments, Dhaka City, Bangladesh

Abstract

Changes in the urban environment of Dhaka City have been evaluated from the geochemical compositions of bottom sediments from two lakes, Gulshan-1 and −2. Abundances of Pb, Zn, Fe2O3 and total sulfur in a Gulshan-1 core gradually increase toward the sediment–water interface. Three stages of condition change can be recognized in Gulshan-1, based on trace metal concentration patterns. The basal Stage I corresponds to background Dhaka sedimentation, whereas gradual increase in Stage II represents the beginning of pollution. Marked increases in Pb and Zn in Stage III reflect rapid urban development and increased emissions to the atmosphere. The condition of the Dhaka environment is compared to that of Japan based on Zn–Fe2O3 and Pb–Fe2O3 relations. Zn–Fe2O3 ratios in Stage I Dhaka sediments are similar to normal Japanese sediments, whereas Stage II data lie on the same trend as Japan urban sediments. Dhaka Stage III samples have greater Zn:Fe2O3 ratios than Japanese urban sediments, suggesting Zn pollution from poorly-controlled industrial sources. In contrast, the Dhaka Pb–Fe2O3 trend lies between normal and urban Japanese sediments. Although vehicle emissions in Dhaka are now significant, the data suggest that Pb pollution from this source remains in its early stages.

This is a preview of subscription content, log in via an institution to check access.

Access this article Subscribe and save

Springer+ Basic

€34.99 /Month

Subscribe now Buy Now

Price includes VAT (Germany)

Instant access to the full article PDF.

Institutional subscriptions

Similar content being viewed by others Explore related subjectsDiscover the latest articles and news from researchers in related subjects, suggested using machine learning. References

Download references

Acknowledgements

The authors thank Professor Yoshihiro Sawada of Shimane University for access to the XRF facilities, and to Manabu Kaita of Shimane University for the REE analysis. Dr. Barry Roser of Shimane University is acknowledged for his constructive review, which improved the manuscript considerably. The Gulshan Lake Authority gave permission to collect samples. The INAA analysis was carried out under the Visiting Research’s Program of the Research Reactor Institute, Kyoto University, Japan.

Author information Authors and Affiliations
  1. Department of Geoscience, Shimane University, Matsue, 690-8504, Japan

    Faruque Ahmed, M. Hawa Bibi & Hiroaki Ishiga

  2. Department of Geology, University of Dhaka, Dhaka, 1000, Bangladesh

    M. Hussain Monsur

Authors
  1. Faruque Ahmed
  2. M. Hawa Bibi
  3. M. Hussain Monsur
  4. Hiroaki Ishiga
Corresponding author

Correspondence to Faruque Ahmed.

About this article Cite this article

Ahmed, F., Bibi, M.H., Monsur, M.H. et al. Present environment and historic changes from the record of lake sediments, Dhaka City, Bangladesh. Environ Geol 48, 25–36 (2005). https://doi.org/10.1007/s00254-005-1248-8

Download citation

Keywords

RetroSearch is an open source project built by @garambo | Open a GitHub Issue

Search and Browse the WWW like it's 1997 | Search results from DuckDuckGo

HTML: 3.2 | Encoding: UTF-8 | Version: 0.7.4