Table 4.

Toxic effects caused by various pollutants generated from effluent of iron and steel plant

Class of pollutants	Toxic effect	Disinfection	Reference
Heavy metals	Poisonous interference to enzyme systems and metabolism of body	Blood and cardiovascular, reproductive and urinary system	Sinha S et al. (2016)
Aromatic compounds	PAH have different type of toxic action, depending on the compound	Non-polar narcosis, photo toxicity results in mutagenicity and Carcinogenicity	CL Beh et al. (2014)
Surfactants	Enhance the bio availability and stimulate the biodegradation	Negative impact on the survival of heterotrophic nanoflagellates and ciliates	Das et al. (2018)
Cyanides	Dynamic effects depend on the dose, route and speed of administration including the physical condition of Recipient	Lethal toxicity after inhalation of hydrogen cyanide gas affects many functions in the body	Abhay et al. (2018)
Fluorides	Intake of 20–40 mg/day can inhibit the important enzyme phosphatase	Osteoporosis and arthritis, cancer, infertility brain damage	Pallabi Das et al. (2018)