Jornal de Efeitos e Controle da Poluição
Acesso livre
ISSN: 2375-4397
ISSN: 2375-4397
David Noel S and Rajan MR
An investigation was made to study the degree of toxicity of dyeing industry effluent on seed germination and early growth of Lady’s finger. Physico-chemical parameters of dyeing industry such as pH, Electrical Conductivitu, Total Solids, Total Dissolved Solids, Total hardness, Chloride, Sulphate, Dissolved oxygen, Biological Oxygen Demand, Chemical Oxygen Demand, Calcium, Sodium, and Potassium were analyzed of which electrical conductivity, total solids, total dissolved solids, sulphate, chemical oxygen demand were relatively high. Germination experiments were carried out in sterilized petri dishes containing 25, 50, 75 and 100% concentrations of untreated dyeing industry effluent. The germination percentage, growth parameters like plumule and radicle length, relative toxicity, percentage of phytotoxicity and tolerance index on the seed germination in response to dyeing effluent at various concentrations were also calculated. There was a gradual decrease in the percentage of seed germination and seedling growth with higher concentration of effluent. Relative toxicity and percentage of phytotoxicity was maximum at 100%. Growth parameter such as plumule and radicle length and tolerance index of seedlings was minimum at 100% and maximum at 25% of effluent concentration.