Vol. 25 (Suppl.) 2006 CHINESE JOURNAL OF GEOCHEMISTRY 87

The leaching Cr concentration of the lime-treated solid was lower than that of the cement-treated solid. The character of heavy metals and environmental pH should be taken into account in S/S treatment and landfill disposal.

Key wards industrial heavy metal sludge; stabilization/solidification; pH value; leaching toxicity

Microbial resistance to the heavy metal pollutant

H u a J I A N G 1, Xiao j ing H U 2, Xiaoq ing W E I 1

Life Science College of Liaoning Normal University, Liaoning, Dalian 116029, China

2 Liaoning Entry-Exit Inspection and Quarantine Bureau, Dalian 116001, China

It is estimated that the poisonous heavy metals released to the environment are up to million tons. Such a great amount of poisonous heavy metals results in a serious bane to ecosystem and human health. The valid control of spreading and pollution of heavy metals in the environment has hence become an urgent matter of the moment. In this study, through tameness and induction of living creature's tolerance from dirty mud, using microbial technology we have cultivated some anti-heavy-metal microbes able to resist the pollutions from poisonous chemical elements such as arsenic, chromium, cadmium, hydrargyrum, and plumbum, four of which are fungi and five are bacteria. The atomic absorption spectroscopy and atomic fluorescence spectrophotometer analyses show that, to the same chemical element, fungi have stronger resistance than bacteria by one time or so. While fungi have the general tolerance of 600xl0 6 to these poisonous elements, bacteria have about 300x10 6. Among these elements, microbes have stronger tolerance to As 5+, and weaker tolerance to Hg 2§ Fungi have better resistance to heavy metals than bacteria, and their hereditary traits are also steadier. Bacteria have unsteady heredity and may lose their resistance easily in their generation. These anti-heavy-metal microbes may be used in water and soil polluted by heavy metals.

Key words heavy metal; microbial resistance; environmental contamination

Environmental impact assessment of industrial activities on the quality of sediments and soils within the LSDPC industrial estate, Lagos, Nigeria

Akinlolu F. Abimbola, Akinade S. Olatunji Department of Geology, University of Ibadan, lbadan, Nigeria

The study examines the impact of industrial activities within the Lagos State Development and Property CorPora- tion (LSDPC) Odogunyan industrial estate on the quality of the sediments and soils within the area. Twenty sam- pies comprising drainage sediments and soils were obtained from within the drains and surrounding areas of the industrial estate. These samples were dried and disaggregated and sieved to appropriate sizes for geochemical analysis. The samples were subsequently digested and analyzed using ICP-OES at the Activation Laboratories, Ontario, Canada. The results of the geochemical analysis showed the following range of concentrations for some selected metals Cd (0.2 x 1 0 6 - 2 . 1 0 x 10-6), Cu (2 8 x 1 0 6 - 1 5 3.0 x 1 0 6 ) Pb (20x 1 0 - 6 - I 4 8 . 0 x 106) Zn (61• 6) Mn (189x106 2024x 10 -6) Mo (bdl-6.0x 10 -6) and W (bdl~.0x 10~). Further

evaluation of the results obtained from the analysis to ascertain their environmental implications indicated that these selected metals are the principal pollutants found in the study area and that the level of these metals in the soils and sediments around these industrial estates can be linked to the industrial practices of the manufacturing outfits located in the area, which dump their untreated wastes

into the environment without any safeguards

Key words industrial estate; Odogunyan; LSDPC; pollutants