of water with the help of copper phytoremediated Andrographis paniculata
Kumar, S.K. Bharti, S. Anand and N. Kumar*
Environmental Science, Babasaheb Bhimrao Ambedkar University, Lucknow-226
Author E-mail: email@example.com
Paper received :
Revised received :
Re-revised received :
Accepted : 16.03.2018
Aim: The present study
aimed to defluoridate water with the help of copper phytoremediated A.
paniculata plant biomass.
Methodology: One gram of dry
root and shoot of A. paniculata (30, 60 and 90 days) grown in Cu
treated soil (50, 100, 150 mg kg-1) was digested separately in a solution of
HNO3:HClO4 (3:1) at 70–80oC and was
subsequently analyzed on atomic absorption spectrophotometer (AA 240 FS,
Varian). Biomass of fresh shoot of A. paniculata 90 days after sowing
(DAS) were collected from the experimental pots (T0, T1, T2 and T3) and
washed carefully with double distilled deionized water and sun dried till
constant weight. Dried plant biomass samples were ground manually and sieved
to obtain powder of below 1.5 mm diameter and used as a biosorbent. Before
applying as a biosorbent, the obtained powdered sample was subjected to
acid/alkali treatment. The treated plant material was washed repetitively
with double distilled water till clear solution having pH 7 was obtained.
Results: Cu accumulation
in roots and shoots after 30, 60 and 90 DAS ranged between 38.19-70.70,
57.23-97.38 and 73.47-184.24 and 25.41-51.23, 26.71-55.75 and 43.16-118.03 µg
g-1 d.wt. respectively. Enrichment coefficient of Cu in root (ECroot)
and shoots (ECshoot) at 30, 60 and 90 days after treatment ranged
between 0.47-0.92, 0.65-1.14, 1.23-2.60 and 0.34-0.51, 0.37-0.53, 0.67-1.48
respectively. The dried and ground biomass of A. paniculata had
successfully reduced fluoride concentration in water from 5 to 0.784 (mg l-1)
accounting for 84% removal at an adsorbent dose of 1.5 mg, contact time 100
min. and pH 3, respectively.
Interpretation: The correlation
coefficient (R2) confirmed the suitability of Langmuir and
Freundlich isotherms. The RL values indicated favorable adsorption process.
Furthermore, Freundlich constant (n) was found to be greater than 1 which
also confirmed the favorable adsorption process.
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