Analysis of the copper removal kinetics of the Philippine giant bamboo (Dendrocalamus asper) in hydroponics

Jerwin Lawrence C Go; Cynthia F Madrazo; Aileen H Orbecido; Ma Ellenita G de Castro; Custer C Deocaris; Lawrence P Belo

doi:10.1016/j.heliyon.2021.e06208

Analysis of the copper removal kinetics of the Philippine giant bamboo (Dendrocalamus asper) in hydroponics

Heliyon. 2021 Feb 12;7(2):e06208. doi: 10.1016/j.heliyon.2021.e06208. eCollection 2021 Feb.

Authors

Jerwin Lawrence C Go¹, Cynthia F Madrazo¹, Aileen H Orbecido¹, Ma Ellenita G de Castro², Custer C Deocaris^{3

4}, Lawrence P Belo¹

Affiliations

¹ Department of Chemical Engineering, Gokongwei College of Engineering, De La Salle University, 2401 Taft Avenue, Manila, 1004, Philippines.
² Forest Biological Sciences, College of Forestry and Natural Resources, University of the Philippines Los Baños, Philippines.
³ Technological Institute of the Philippines, Quezon City, Philippines.
⁴ Biomedical Research Section, Atomic Research Division, Philippine Nuclear Research Institute, Quezon City, Philippines.

Abstract

Copper is the third most utilized metal and is a versatile resource with multiple beneficial uses, but it may also become toxic to aquatic life in excess amount. Thus, there is a need to develop methods to reduce the copper contamination in the environment, particularly in bodies of water. Phytoremediation using Dendrocalamus asper may offer an environment-benign and potentially effective method for copper removal though its effectiveness may take several years to materialize for this technology to become cost-effective. By growing D. asper in synthesized contaminated water and analyzing the change in the copper content of the substrate via atomic absorption spectrophotometry, the removal was found to be optimal at 20 ppm Cu and pH 5. The rate of removal was found to have an order of 2.71 and a kinetic constant of 0.0013 ppm^-1.71 day^-1. With this, it may be possible to estimate the treatment length of phytoremediation given an initial level of copper contamination and a target concentration.

Keywords: Bamboo; Copper; Dendrocalamus asper; Kinetics; Philippines; Phytoremediation.