Influence of paper board mill effluent on soil properties.

摘要

Field survey involved collection and analysis of thirty-five soil samples representing in and around the factory areas covering Mandaraikadu, Devanapuram, Periya Thekkampatti, Chinna Thekkampatti, Chinna Kandiyur and Rangarajapuram villages. Soil samples were collected once in three months to assess the changes in soil quality parameters if any due to effluent contamination. The soil was analyzed for its chemical properties viz., pH, EC, OC, available NPK, exchangeable Ca, Mg, Na, K and DTPA Cu Fe, Mn, Zn. The microbial population of bacteria, actinomycetes and fungi were also enumerated. The pH, EC, OC, available nutrients (NPK), exchangeable cations (Ca, Mg, Na, K), ESP, SAR and CEC were high in effluent irrigated soils in and around the factory regions compared to the Bhavani river water irrigated soils. The above soil properties were increased due to continuous effluent irrigation at periodical intervals. The microbial population also increased considerably due to continuous effluent irrigation.