Phytoremediation potential of selected plants in Netravati and Gurupura estuary of Karnataka

Sulochanan, Bindu and Veena, S and Jayasankar, Reeta and Pranav, P (2022) Phytoremediation potential of selected plants in Netravati and Gurupura estuary of Karnataka. Indian Journal of Soil Conservation, 50 (3). pp. 226-231.

Text Indian Journal of Soil Conservation_2022_Bindu Sulochanan.pdf Download (1MB)

Abstract

Unsustainable land use due to increasing human population, economic development and emerging global markets have resulted in contamination of soil, soil erosion and eutrophication in coastal regions. Freshwater needs of people are met almost entirely by precipitation on land, with a small though increasing amount by desalination. Hence, appropriate technologies need to be adopted to conserve and protect both soil and water. Use of plants to reduce environmental pollutants is considered as a non invasive technology. Mangrove ecosystem in the estuarine waters of Netravati and Gurupura rivers acts as a shield to absorb the heavy metals before it reaches the Arabian sea. The heavy metal Cu absorbed by Acanthus ilicifolius (AI) was 9.24±2.87 ppm, while Cd, Cr and Hg absorbed in the sedge plant Cyperus malaccensis (CM) was 0.40±0.47 ppm, 1.09±0.32 ppm, and 0.21±0.05 ppm, respectively. Out of the 7 different plants selected from the estuarine area near the bar mouth of Mangaluru, Acanthus ilicifolius and Cyperus malaccensis was observed to have greater potential to adsorb heavy metals. Treated, semi treated and untreated wastewater discharged from urban area into the Arabian sea through the estuary is rich in nutrients leading to eutrophication. Preliminary treatment studies were carried out to assess the removal of nutrient load from this effluent water in laboratory conditions using aquatic weeds. This revealed that Hydrilla verticillata reduced 42.8% ammonia in the effluent water while Eicchornia crassipes and Pistia stratiotes reduced 61.7% phosphate and 68.2% nitrite, respectively. The study reveals that aquatic weeds could be used to remove nutrients from wastewater before it enters the marine ecosystem and locally available mangrove and sedge plants aid in reduction of contaminants in the coastal ecosystem

Item Type:	Article
Uncontrolled Keywords:	Environmental contamination; Heavy metal; Phytoremediation; Soil; Water
Divisions:	CMFRI-Mangalore CMFRI-Kochi > Fishery Environment Management Division Subject Area > CMFRI > CMFRI-Kochi > Fishery Environment Management Division CMFRI-Kochi > Fishery Environment Management Division Subject Area > CMFRI-Kochi > Fishery Environment Management Division
Depositing User:	Arun Surendran
Date Deposited:	03 Feb 2023 05:19
Last Modified:	01 Mar 2023 04:09
URI:	http://eprints.cmfri.org.in/id/eprint/16678

Actions (login required)

View Item