Utility of chemically modified agricultural waste okra biomass for removal of toxic heavy metal ions from aqueous solution

2015 ◽  
Vol 8 (1) ◽  
pp. 52-60 ◽  
Author(s):  
Amar Singh Singha ◽  
Ashish Guleria
Keyword(s):  
Aqueous Solution ◽  
Heavy Metal ◽  
Metal Ions ◽  
Heavy Metal Ions ◽  
Agricultural Waste ◽  
Toxic Heavy Metal ◽  
Chemically Modified

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

Removal of Toxic Heavy Metal Ions in Aqueous Solution with Mg/Al Type Hydrotalcite Derived from Wastes

2005 ◽  
Vol 31 (4) ◽  
pp. 285-290 ◽  
Author(s):  
Norihiro Murayama ◽  
Mitsuaki Tanabe ◽  
Ryo Shibata ◽  
Hideki Yamamoto ◽  
Junji Shibata
Keyword(s):  
Aqueous Solution ◽  
Heavy Metal ◽  
Metal Ions ◽  
Heavy Metal Ions ◽  
Toxic Heavy Metal

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.

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.

Effective Removal of Toxic Heavy Metal Ions from Aqueous Solution by CaCO3 Microparticles

2018 ◽  
Vol 229 (4) ◽  
Author(s):  
Rui Zhang ◽  
Joseph J. Richardson ◽  
Anthony F. Masters ◽  
Gyeongwon Yun ◽  
Kang Liang ◽  
...  
Keyword(s):  
Aqueous Solution ◽  
Heavy Metal ◽  
Metal Ions ◽  
Heavy Metal Ions ◽  
Toxic Heavy Metal ◽  
Effective Removal
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