scholarly journals Nanoscale zero-valent iron-impregnated agricultural waste as an effective biosorbent for the removal of heavy metal ions from wastewater

2016 ◽  
Vol 2 (1) ◽  
Author(s):  
P. Senthil Kumar ◽  
A. Saravanan ◽  
P. Sundar rajan ◽  
M. Yashwanthraj
Keyword(s):  
Heavy Metal ◽  
Metal Ions ◽  
Heavy Metal Ions ◽  
Agricultural Waste ◽  
Zero Valent Iron ◽  
Nanoscale Zero Valent Iron

Bioadsorption of Multiple Heavy Metal Ions by Rhizophora Apiculate sp. and Elaesis Guineensis sp.

2017 ◽  
Vol 14 (1) ◽  
pp. 15
Author(s):  
M.B. Nicodemus Ujih ◽  
Mohammad Isa Mohamadin ◽  
Milla-Armila Asli ◽  
Bebe Norlita Mohammed
Keyword(s):  
Heavy Metal ◽  
Metal Ions ◽  
Removal Efficiency ◽  
Heavy Metal Ions ◽  
Agricultural Waste ◽  
Living Organism ◽  
Heavy Metal Concentration ◽  
Industrial Area ◽  
Electrochemical Treatment ◽  
Chemical Oxidation

Heavy metal ions contamination has become more serious which is caused by the releasing of toxic water from industrial area and landfill that are very harmful to all living organism especially human and can even cause death if contaminated in small amount of heavy metal concentration. Currently, peoples are using classic method namely electrochemical treatment, chemical oxidation/reduction, chemical precipitation and reverse osmosis to eliminate the metal ions from toxic water. Unfortunately, these methods are costly and not environmentally friendly as compared to bioadsorption method, where agricultural waste is used as biosorbent to remove heavy metals. Two types of agricultural waste used in this research namely oil palm mesocarp fiber (Elaesis guineensis sp.) (OPMF) and mangrove bark (Rhizophora apiculate sp.) (MB) biomass. Through chemical treatment, the removal efficiency was found to improve. The removal efficiency is examined based on four specification namely dosage, of biosorbent to adsorb four types of metals ion explicitly nickel, lead, copper, and chromium. The research has found that the removal efficiency of MB was lower than OPMF; whereas, the multiple metals ions removal efficiency decreased in the order of Pb2+ > Cu2+ > Ni2+ > Cr2+.

scholarly journals Trends in the mitigation of heavy metal ions from aqueous solutions using unmodified and chemically-modified agricultural waste adsorbents

2021 ◽  
pp. 100188
Author(s):  
Oluwafemi Ogunlalu ◽  
Ifeoluwa Peter Oyekunle ◽  
Kingsley O. Iwuozor ◽  
Abiodun Daniel Aderibigbe ◽  
Ebuka Chizitere Emenike
Keyword(s):  
Heavy Metal ◽  
Aqueous Solutions ◽  
Metal Ions ◽  
Heavy Metal Ions ◽  
Agricultural Waste ◽  
Chemically Modified

Research Progress on Biosorption of Heavy Metal Ions by Agricultural Waste Materials

2012 ◽  
Vol 550-553 ◽  
pp. 2338-2344 ◽  
Author(s):  
Wei Jiang Zhang ◽  
Jing Bo Hu ◽  
Jiao Xu ◽  
Yun Hui Li
Keyword(s):  
Heavy Metal ◽  
Metal Ions ◽  
Adsorption Kinetics ◽  
Future Development ◽  
Heavy Metal Ions ◽  
Agricultural Waste ◽  
Research Progress ◽  
Waste Materials ◽  
Adsorption Thermodynamics ◽  
Characterization Methods

This article has described the biosorption of heavy metal ions using agricultural wastes as a potential adsorbent. The modified methods, the characterization methods, the parameters influence, the adsorption kinetics, the adsorption isotherms, the adsorption thermodynamics and the regeneration of biosorbents have also been discussed. Moreover, the future development of biosorbents has been prospected.

scholarly journals Utilization of agricultural waste adsorbent for the removal of lead ions from aqueous solutions

2021 ◽  
Vol 61 (4) ◽  
pp. 570-578
Author(s):  
Adeyinka Sikiru Yusuff ◽  
Lekan Taofeek Popoola ◽  
Victor Anochie
Keyword(s):  
Aqueous Solution ◽  
Heavy Metal ◽  
Metal Ions ◽  
Contact Time ◽  
Heavy Metal Ions ◽  
Agricultural Waste ◽  
Bet Surface Area ◽  
Solution Ph ◽  
Batch Mode ◽  
Onion Skin

In this study, a performance evaluation of an aluminium oxide modified onion skin waste (Al2O3/OSW) for the removal of heavy metal ions (Pb2+ and Cd2+) from aqueous solution was investigated under batch mode adsorption. The surface morphology, elemental composition, functional groups, textural characteristics and surface charge of the as-made Al2O3/OSW adsorbent were examined using SEM, EDX, FTIR, BET surface area and pHpzc techniques, respectively. The effects of initial cations concentration, contact time, adsorbent dosage, and pH on adsorption of Pb2+ and Cd2+ onto Al2O3/OSW were studied. The adsorption data obtained were evaluated by various adsorption isotherm and kinetic models. Results obtained showed that maximum removal percentages of Pb2+ and Cd2+ were 91.23 and 94.10%, respectively, at the optimum Al2O3/OSW dosage of 1.4 g, contact time of 180 min and aqueous solution pH of 6.0. The isotherm and kinetic studies showed a multilayer adsorbate-adsorbent system with the dominance of the chemisorption mechanism. The study concluded that onion skin waste is a viable, cheap and very effective alternative for removing heavy metal ions from water/wastewater.

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