Adsorption of Metal Ions onto the Chemically Modified Agricultural Waste

2011 ◽  
Vol 40 (2) ◽  
pp. 188-197 ◽  
Author(s):  
Ponnusamy Senthil Kumar ◽  
Subramaniam Ramalingam ◽  
Ramasundaram Vijayakumar Abhinaya ◽  
Selvaraj Dinesh Kirupha ◽  
Arukkani Murugesan ◽  
...  
Keyword(s):  
Metal Ions ◽  
Agricultural Waste ◽  
Chemically Modified ◽  
Adsorption Of Metal Ions

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

scholarly journals Adsorption of Cu(ii), Zn(ii), and Pb(ii) from aqueous single and binary metal solutions by regenerated cellulose and sodium alginate chemically modified with polyethyleneimine

RSC Advances ◽  
2018 ◽  
Vol 8 (33) ◽  
pp. 18723-18733 ◽  
Author(s):  
Wei Zhan ◽  
Chuanhui Xu ◽  
Guangfu Qian ◽  
Guohuan Huang ◽  
Xiuzhen Tang ◽  
...  
Keyword(s):  
Metal Ions ◽  
Sodium Alginate ◽  
Competitive Adsorption ◽  
Regenerated Cellulose ◽  
Chemically Modified ◽  
Binary Metal ◽  
Adsorption Of Metal Ions

Crosslinked cellulose/sodium alginate was modified with polyethyleneimine as an adsorbent (PEI-RCSA) for comparative and competitive adsorption of metal ions.

scholarly journals Removal of Heavy Metal Ions from Wastewater by Chemically Modified Agricultural Waste Material as Potential Adsorbent-A Review

2018 ◽  
Author(s):  
Jyotikusum Acharya ◽  
Upendra Kumar ◽  
P. Mahammed Rafi
Keyword(s):  
Heavy Metal ◽  
Metal Ions ◽  
Heavy Metal Ions ◽  
Conventional Treatment ◽  
Metal Removal ◽  
Agricultural Waste ◽  
Heavy Metal Removal ◽  
Chemically Modified ◽  
Adsorption Capacities ◽  
Heavy Metal Remediation

Heavy metal remediation of aqueous streams is of special concern due to recalcitrant and persistency of heavy metals in environment. Conventional treatment technologies for the removal of these toxic heavy metals are not economical and further generate huge quantity of toxic chemical sludge. Agricultural waste materials being economic and ecofriendly due to their unique biochemical composition, availability in abundance, renewable, low in cost and more efficient are seem to be viable option for heavy metal remediation. The major advantages of biosorption over conventional treatment methods include: low cost, high efficiency, minimization of chemical or biological sludge, regeneration of biosorbents and possibility of metal recovery. It is well known that cellulosic waste materials can be obtained and employed as cheap adsorbents and their performance to remove heavy metal ions can be affected upon chemical treatment. In general, chemically modified plant wastes exhibit higher adsorption capacities than unmodified forms. The functional groups present in agricultural waste biomass viz. acetamido, alcoholic, carbonyl, phenolic, amido, amino, sulphydryl groups etc. Have affinity for heavy metal ions to form metal complexes or chelates. Some of the treated adsorbents show good adsorption capacities for Cd, Cu, Pb, Zn and Ni. Rice husk as a low-value agricultural by-product can be made into sorbent materials which are used in heavy metal removal. The mechanism of biosorption process includes chemisorptions, complexation, adsorption on surface, diffusion through pores and ion exchange etc. Agricultural residues are lignocelluloses substances which contain three main structural components: hemicelluloses, cellulose and lignin. Lignocellulosic materials also contain extractives. Generally, three main components have high molecular weights and contribute much mass, while the extractives is of small molecular size, and available in little quantity, which announce in heavy metal removal.

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