Journal
CHEMOSPHERE
Volume 66, Issue 3, Pages 444-451Publisher
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.chemosphere.2006.06.021
Keywords
bryophytes; sulphur pollution effects; chlorophyll concentration; water hardness
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The aquatic moss, Fontinalis an tipyretica was exposed to elevated sulphate concentrations for 21-days. Gametophores were sectioned to 2 cm lengths and exposed to sulphate concentrations up to 1500 mg/l, in waters of different water hardness. Significant reductions in shoot length, dry weight, and chlorophyll a and b concentrations (per gram dry weight) were observed in soft water (19 mg/l as CaCO3); however, effects were significantly reduced in waters of increasing hardness (up to 105 mg/l as CaCO3). The substantial reduction of sulphate toxicity in waters of increasing hardness suggests water chemistry plays a significant role in affecting sulphate toxicity and should be considered when setting sulphate discharge limits. (c) 2006 Elsevier Ltd. All rights reserved.
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