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Heavy Metals Removal from Simulated Wastewater using Horizontal Subsurface Constructed Wetland

M-Ridha Mohanad J., Zeki Suhair L., Mohammed Sabah J., Abed Khalid M., Hasan Hassimi Abu

Journal of Ecological Engineering

2021

Vol. 22, nr 8

243--250

This study aimed to assess the efficiency of Nerium oleander in removing three different metals (Cd, Cu, and Ni) from simulated wastewater using horizontal subsurface flow constructed wetland (HSSF-CW) system. The HSSF-CW pilot scale was operated at two hydraulic retention times (HRTs) of 4 and 7 days, filled with a substrate layer of sand and gravel. The results indicated that the HSSF-CW had high removal efficiency of Cd and Cu. A higher HRT (7 days) resulted in greater removal efficiency reaching up to (99.3% Cd, 99.5% Cu, 86.3% Ni) compared to 4 days. The substrate played a significant role in removal of metals due to adsorption and precipitation. The N. oleander plant also showed a good tolerance to the uptake of Cd, Cu, and Ni ions from water. The highest removal of the heavy metals indicated that the HSSF-CW would be a promising technology for heavy metal contaminated wastewater as well as in electroplating and manufacturing industries.

Two New Steroids Dehydroadynerizoside and Neristigmol from Nerium oleander Leaves

Siddiqui B., Khatoon N., Begum S., Sultana R., Durrani S.

Polish Journal of Chemistry

2006

Vol. 80, nr 3

445-452

Two new steroids dehydroadynerizoside (1) and neristigmol (2) have been isolated from the fresh, uncrushed leaves of Nerium oleander and their structures elucidated as 3beta-O-(beta-D-2-deoxy-rhamnosyl)-8,14beta-epoxy-5beta-carda-16,20(22)-dienolide and hexyl p-stigmasteryloxy-benzoate, respectively. The structure elucidation is based on spectroscopic methods including 1D NMR (1H NMR, 13C NMR) and 2D NMR (1H-1H COSY, NOESY, HMQC, HMBC and J-resolved) and chemical transformation.

Roadside Plants as Possible Indicators of Heavy Metal Pollution in Turkey

Aksoy A., Celik A., Ozturk M., Tulu M.

Chemia i Inżynieria Ekologiczna

2000

Vol. 7, nr 10

991-996

Cynodon dactylon, Nerium oleander and Pinus brutia a herb, a shrub and a tree; are very commonly met alongside the roads in the Mediterranean region of Turkey. Since roadside plants in this region are under a great pressure of traffic, an attempt was made to determine lead and cadmium accumulation in the species cited above. During summer, a peak traffic season in the Mediterranean above ground parts of C. dactylon, leaves of N. oleander and bark of P. brutia were collected between 0-5 m distance from 15 localities alongside the roads. These were subjected to an analysis in unwashed form. Results obtained revealed that Pb and Cd varied between 4.65-106.30 and 0.165-1.615 mg/g dry weight, respectively. The highest accumulation was in C. dactylon followed by leaves of N. oleander. Bark of P. brutia showed the lowest values.

Cynodon dactylon, Nerium oleander i Pinus brutia to, odpowiednio, trawa, krzew i drzewo; są one stosunkowo dobrze poznanymi roślinami przydrożnymi regionu wybrzeża M. Śródziemnego w Turcji. Ponieważ w tym regionie rośliny przydrożne znajdują się pod wpływem ruchu drogowego, dlatego oznaczano w nich ołów i kadm. Latem, w okresie wzmożonego ruchu na drogach, pobierano nadziemne części C. dactylon, liście N. oleander i korę P. brutia w odległości 0-5 m w 15 wybranych miejscach w pobliżu drogi. Rośliny poddano analizie w formie niemytej. Uzyskane dane zawartości Pb i Cd mieściły się w zakresie 4,65-106,30 i 0,165-1,615 mg/g suchej masy. Największą kumulację wykazywał C. dactylon, następnie liście N. oleander. Kora P. brutia oznaczała się najmniejszymi wartościami analizowanych metali.