A review of occurrences and treatment of polynuclear aromatic hydrocarbons in water

The epigeic lichen biota of ten post-smelting slag dumps were studied to identify the ecological importance of Cladonia species in spontaneous succession within artificial areas. Species diversity, abundance, constancy and cover indices were determined at the initial stages of vegetation establishment. Substrates under lichen vegetation were characterised in terms of the pH, organic C and total N content, C/N ratio and Zn, Pb, Cd and As concentration. Species occurrence and abundance indices were related to habitat type, enabling the ability to identify species-specific responses to environmental factors. Despite the unfavourable and artificial habitat conditions at dump sites, some Cladonia appear abundant and form swards, with Cladonia rei as a dominant species. They appear to be well-adapted for slag substrate and their special arrangement illustrative of site contamination. Certain sward-forming Cladonia lichens play a fundamental role as effective pioneers in the initial stage of succession and provide stable plant cover development.

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Cladonia lichens as the most effective and essential pioneers in strongly contaminated slag dumps

Chemical changes of organic compounds in chlorinated water. XI. Thin-layer chromatographic fractionation of Ames mutagenic compounds in chlorine-treated 4-methylphenol solution.

Chemical changes of organic compounds in chlorinated water. XVI. Gas chromatographic-mass spectrometric studies of reactions of tricyclic aromatic hydrocarbons with hypochlorite in dilute aqueous solution

Chemical changes of organic compounds in chlorinated water. XII: Gas chromatographic-mass spectrometric studies of the reactions of methylnaphthalenes with hypochlorite in dilute aqueous solution

Po Ki Chan

Papers

Formation of polychlorinated aromatic compounds during aqueous chlorination