EVALUATION OF NITRATE REMOVAL BY MEMBRANE CAPACITIVE DEIONIZATION

Authors

  • Dr. Archana Vyas Lecturer, Department of Chemistry, Govt. Polytechnic College, Jalore, Rajasthan, India

Keywords:

Nitrate, Membrane Capacitive Deionization (MCDI), Reverse Osmosis

Abstract

Water is the symbol of existence of life. In the modern industrial era, we have used water so care Jlessly. To
complicate matters, increasing groundwater extraction around the globe results in progressive salt water ingress in wells
and aquifers. Potable water as well as water for agriculture and industry has become critical. Rajasthan is the largest
state, which covers 10% of the country area but receives only 1/100 of the total rains. It shares only 1/10 of the average
share of water than rest of the country. The geographical and geological setup leads to deterioration of water quality.
Therefore, state faces acute water crisis making Groundwater a centralized source of drinking water for millions of rural
and urban families in Rajasthan. Unfortunately, Groundwater is deeper and contains high minerals and concentrated
chemicals, making the water unfit to drink. Water quality standards are not meeting the prescribed Indian standards.
Contamination of groundwater with nitrates is a major concern, especially for areas relying on this as a drinking water
source. In this work, a capacitive deionization (CDI) system equipped with carbon electrodes coated with different metal
oxides was studied to determine its ability to reduce nitrate concentrations. Results performed in a three-electrode cell
were used as a proof of concept and demonstrated that coated electrodes had higher nitrate removal than that of
uncoated electrodes, likely because of a reduction in hydrophobicity and an increase in surface area provided by the
metal oxides. The study was carried out to evaluate efficiency of membrane capacitive deionization for removal of nitrate
from underground water with elevated electric conductivity in the western Rajasthan. Accordingly, certain areas of
Jodhpur and Jaisalmer districts were selected as the study area. The pilot plant (CapDI) manufactured by Voltea
(Netherland) was provided by In Now India Pvt. Ltd for carrying out this study. It is found that MCDI technology is very
effective in nitrate removal if total dissolved solids concentration is less than 5000 mg/ lt and percentage reduction of
nitrate by MCDI technology is almost same as of by reverse osmosis technology. It was found that MCDI technology
requires less power &gives more water recovery with low maintenance cost. Therefore it can be said MCDI technology
is better than reverse osmosis technology.

Published

2016-09-25

How to Cite

Dr. Archana Vyas. (2016). EVALUATION OF NITRATE REMOVAL BY MEMBRANE CAPACITIVE DEIONIZATION. International Journal of Advance Research in Engineering, Science & Technology, 3(9), 55–59. Retrieved from https://ijarest.org/index.php/ijarest/article/view/971