Kinetics of Manganese Uptake by Wetland Plants

Ghaly,

doi:10.3844/ajassp.2008.1415.1423

Cited by 12 publications

(6 citation statements)

References 29 publications

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“…Ittana [17] stated that the differences in Mn uptake in plants are attributed to their tolerance range. While Ghaly et al [18] demonstrated that the Mn uptake rate and the maximum amount which can be accumulated in each plant species will be affected by the initial Mn concentration in the wastewater.…”

Section: Resultsmentioning

confidence: 99%

Cyperus longusL. as a biological purifier of wastewater for irrigation purposes: removal efficiency and Zn, Cd, Cu, Fe and Mn

Ganjo¹,

Mirza²

2013

WIT Transactions on Biomedicine and Health

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The common and cosmopolitan distributed wastewater macrophyte, namely, Cyperus longus L. was tested as a biological wastewater purifier. Indoor experiments were mainly based on conventional wastewater treatment processes, besides the specified design of sand filtration pots, implanted by C. longus L. Untreated and treated wastewater samples were analyzed for their key physicochemical properties and some heavy metals (only the removal efficiency of the heavy metals Zn, Cd, Cu, Fe and Mn by C. longus L. is highlighted in this paper). After 129 days (including 45 days, the time needed for the growth/stabilization of C. longus L. in experiment pots) the C. longus L. was harvested and heavy metals were analyzed in root and shoot systems. The removal efficiency (i.e. uptake/bioaccumulation rate) was then followed up. Results showed that the accumulation rate in the plant roots was much higher than the shoots. Higher metal bioaccumulation per cent was noted in roots; Zn (0.522%), Cu (0.821%), Fe (80.480%), Mn (1.886%) and Cd (0.659%) compared with control (irrigated with clean water); Zn (0.147%), Cu (0.167%), Fe (12.590%), Mn (0.331%) and Cd (0.124%). On the other hand, metal bioaccumulation per cent in shoot system was: Zn (0.412%), Cu (0.458%), Fe (4.540%), Mn (1.719%) and Cd (0.567%) compared with control. Always, the more replicated sand filtration pots the highest removal efficiency of heavy metals was achieved.

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Section: Resultsmentioning

confidence: 99%

Cyperus longusL. as a biological purifier of wastewater for irrigation purposes: removal efficiency and Zn, Cd, Cu, Fe and Mn

Ganjo¹,

Mirza²

2013

WIT Transactions on Biomedicine and Health

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“…2 shows that the softening point was slightly increased with the addition of the polymer mixtures to range between 61°C and 74°C for RPMB at 7% in respectively PP, PS, PP/SBS, LDPE/SBS and PS/SBS except for the RPMB at 7% of LDPE binder where the softening point increased considerably to reach 87°C, which can be interpreted positively especially in enhancing the performance at high temperature and improving the RPMB and the SBS/RPMB mixtures characteristics in term of rutting [18]. According to these results the adding of SBS to the RPMB mixtures impacted positively the softening point of the mixtures except for LDPE/RPMB where the softening point decreased but still in good position in comparison with the pure bitumen softening point., which could be explained by the network structure formed by SBS in the RPMB's mixtures [19].…”

Section: Methodsmentioning

confidence: 99%

“…The penetration index of bitumen ranges between +1 and -1 for road construction. When PI goes under -2 this shows a Newtonian behavior with more temperature susceptibility, and when PI is greater than +2, the bitumen binder is less brittle with high elastic properties and with more susceptibility to low temperature [14][15][16][17][18][19][20]. As showed in the Fig.…”

Section: Penetration Indexmentioning

confidence: 99%

Recycled thermoplastics modified bitumen improved with thermoplastic elastomer

et al. 2020

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The use of different types of recycled plastic waste such as recycled polypropylene (PP), recycled low-density polyethylene (LDPE) and recycled polystyrene (PS), as raw materials for bitumen modification is known. However, the mechanical and thermal properties of recycled plastic waste modified bitumen (RPMB) are lower than those of the pure plastic modified bitumen. Therefor this paper aims to study the mechanical and thermal properties improvement of the RPMB with the use of a commercial elastomer styrene-butadiene-styrene (SBS). Initially conventional 35/50 quality bitumen was mixed with different percentages of LDPE, PS and PP, and then doped with commercial SBS. Basic rheological parameters such as penetration, softening point, elastic recovery and penetration index showed the changes caused by each rate of polymer addition to pure bitumen. The tests showed that the penetrability of the modified bitumen decreases and its softening point and elastic recovery increases, resulting in a decrease in the thermal sensitivity of the new bitumen mixture.

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“…Numerous metals such as manganese (Mn), mercury (Hg), lead (Pb), cadmium (Cd), arsenic (As), copper (Cu). are known to be significantly toxic due to their non-biodegradability and toxicity (Ghaly et al, 2008;Omar and Al-Itawi, 2007). Among these heavy metals, copper is considered as one of the most toxic one.…”

Section: Introductionmentioning

confidence: 99%

Equilibrium Kinetics and Isotherm Studies of Cu (II) Adsorption from Waste Water onto Alkali Activated Oil Palm Ash

Chowdhury¹,

Zain²,

Khan³

et al. 2011

American Journal of Applied Sciences

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Problem statement: Heavy metal accumulation in waste water could affect aquatic life, human health and overall ecosystem adversely. Therefore, in recent years much emphasis has been given for the use of industrial waste material as low cost adsorbents for removal of metallic contaminants from waste water. Approach: Present study deals with the adsorption equilibrium and kinetics of Cu (II) cation using sodium hydroxide activated Oil Palm Ash (OPA). Adsorption was investigated in a batch system with respect to various parameters such as initial metal ion concentration, contact time and pH of the solution. Surface characterization of the prepared adsorbent was done by using surface area analyzer, Scanning Electron Microscope (SEM) and X-ray Fluorescence and compared with natural oil palm ash. The adsorption equilibrium data were best represented by Langmuir, Freundlich and Temkin model. Equilibrium kinetics studies were performed by Pseudo first order, Pseudo second order and Intra-particle diffusion. Results: Maximum monolayer adsorption capacity observed at 30°C was 18.86 mg g⁻¹. Kinetic data correlated well with the pseudo second order model, suggesting that the adsorption process might be chemical sorption. The linear plots of intra particle diffusion revealed that the adsorption process was mainly governed by pore diffusion. Equilibrium uptake was increased with increase of initial concentration and contact time. Experimental data showed that about 96.03% of copper can be removed at pH 5.5. Conclusion: The research concluded that activation by alkali treatment of natural OPA would produce sufficient porosities and surface area and it has got good potential to remove Cu (II) from waste water

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Kinetics of Manganese Uptake by Wetland Plants

Cited by 12 publications

References 29 publications

Cyperus longusL. as a biological purifier of wastewater for irrigation purposes: removal efficiency and Zn, Cd, Cu, Fe and Mn

Cyperus longusL. as a biological purifier of wastewater for irrigation purposes: removal efficiency and Zn, Cd, Cu, Fe and Mn

Recycled thermoplastics modified bitumen improved with thermoplastic elastomer

Equilibrium Kinetics and Isotherm Studies of Cu (II) Adsorption from Waste Water onto Alkali Activated Oil Palm Ash

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