Investigation acute toxicity some of heavy metals at different water hardness
Journal Title: International journal of Advanced Biological and Biomedical Research - Year 2013, Vol 1, Issue 2
Abstract
All aquatic organisms are directly or indirectly affected by the physical characteristics of their environment, especially the chemical composition of the water. The high concentration levels, damage tissues and interfere with the normal growth and proliferation. The aim of this research was to Investigation acute toxicity of ZnSO4 and CuCl2 to Gambusia holbrooki by static bioassays at different water hardness. The acute toxicity of selected heavy metals to fish was determined in soft, hard and very hard water, respectively (25, 125 and 350 mg/L as CaCO3). Results showed that water hardness had a significant effect in terms of Cu and Zn toxicity in fish. The toxicity of Cu and Zn increased with decreasing water hardness. Results indicated that an increase in water hardness (from 25 to 350 mg/L as a CaCO3) substantially reduced the toxicity of Cu (up to 38-fold) and Zn (up to 264-fold) to fish at 96 hours exposure. The 96 hours LC50 values for fish were higher in the hard and very hard water compared to the soft water. Water hardness had a much smaller effect on the acute toxicity of Cu than the Zn in fish. Cu toxicity in all water types was higher than Zn toxicity for fish. In polluted areas, it is recommended to expand the aquaculture activities in the water resources that their hardness is higher than the average water hardness in the environment. The toxicity effect of other heavy metals on more diverse aquatic animals should be investigated in the future research.
Authors and Affiliations
Vahed Kiyani| MSc.Student, Filed of Natural Resources-Environment, University of Tehran, Iran Corresponding Author E-mail: kiyanivahed@alumni.ut.ac.ir, Mohammadhasan Hosynzadeh | MSc.Student, Faculty Environment & Energy, Islamic Azad University, Tehran, Iran, Mohammad Ebrahimpour | Assistant Professor, Faculty of Agriculture, University of Birjand, Iran
Keywords
Related Articles
- EP ID EP12796
- DOI -
- Views 427
- Downloads 18
Effect of Incorporation of Crops Residue into Soil on Some Chemical Properties of Soil and Bioavailability of Copper in Soil
Objective: Returning crop residue to the soil exerts favorable effects on physical and chemical properties of soil. In fact, the plant residues can affect soil conditions such as pH and important role in soil fertility...
An analysis of energy use, CO2 emissions and relation between energy inputs and yield of hazelnut production in Guilan province of Iran
The objectives of this research were to investigate influences of energy inputs and energy forms on output levels and evaluation of CO2 emissions for hazelnut production in Guilan province of Iran. Moreover, the sensit...
Streptomycetes: Characteristics and Their Antimicrobial Activities
The Streptomycetes are gram positive bacteria with a filamentous form that present in a wide variety of soil including composts, water and plants. The most characteristic of Streptomycetes is the ability to produce sec...
Chemical Composition of the Essential Oil from the Aerial Parts of Ixiolirion tataricum (Pall.) Herb
The genus Ixiolirion, belonging to the Amaryllidaceae family, contains about 3 species distributed in center and southwest of Asia and northeast of Africa. The Iranian flora consists of only one bulbous flowering speci...
Effects of frozen diluents on storage of ram sperm
Semen collection evaluation and addition of preservatives to increase storage period of sperm are essential for successful artificial insemination. This study was conducted on 4rams (2 Ghezel Merinos and 2 Merinos Mogh...