APPLICATION OF Mangifera indica SEED SHELL FOR EFFECTIVE ADSORPTION OF Fe(II) AND Mn(II) FROM AQUEOUS SOLUTION

Abstract

Adsorption has proved to be an excellent way to treat industrial wastewater, due to its significant advantages like easy availability, inexpensive, ease of operation and highly efficient, compared to conventional expensive adsorbents like activated charcoal, alumina etc. The present investigation focused on utilization of Mangifera indica seed shell substrate for the removal of toxic heavy metals like Fe(II) and Mn(II) from wastewater. Mangifera indica seed shell substrate as an effective adsorbent was used for the first time for removal of Fe(II) and Mn(II) from aqueous solution. The adsorption isotherms were obtained in a batch reactor. Effect of various parameters like agitation time, pH, metal ion concentration, temperature, and doses of substrate were studied. It is evident that, the process of removal followed first order rate adsorption and the experimental data fitted well to Freundlich adsorption isotherm. The values of Freundlich isotherm parameter were between zero and one indicating favourable sorption for Fe(II) and Mn(II) metal ions. It shows good adsorption capacity towards Iron (II) and Manganese (II) at 30 min of optimum agitation time and at a pH of 4.5 even at low concentration. It effectively removed 81-82% of Fe(II) and Mn(II) in a single batch. It is also effective to remove heavy metal ions from single metal solutions as well as in the presence of other cometal ions with the main metal of solution. This biosorbent can be successfully utilized for removal of toxic metals from industrial effluents, which could solve the problem of disposal of plant waste materials.

Chitosan-Grafted Carbon for the Sequestration of Heavy Metals in Aqueous Solution

“…The higher Kvalues exhibit by the sorption of Pb 2+ suggests that Pb 2+ has greater sorption tendency towards the adsorbents than Cr 6+ . The higher numerical values of K confirm the significant affinity of adsorbate towards the adsorbent [55].…”

“…Since the fractional value of 1/n in the adsorption of Pb 2+ (0.6347) is small compared to 1/n value of the adsorption of Cr 6+ (1.087), it indicates favourable adsorption for Pb 2+ than Cr 6+ . A smaller value of 1/n indicates better adsorption mechanism and formation of relatively stronger bond between adsorbate and adsorbent [55,[57][58]. The Qmax value which is the maximum value of Q, is important to identify the adsorbent highest metal uptake capacity [51,[59][60].…”

Biological Metabolism Synthesis of Metal Oxides Nanorods from Bacteria as a Biofactory toward High‐Performance Lithium‐Ion Battery Anodes

“…Particularly, the recovery of metal ions (pollutants) from industrial wastewaters and the further processing into high‐value functional materials for energy storage/conversion applications have attracted much attention . Up to now, diverse physico‐chemical methods including precipitation, coagulation‐flocculation, filtration, and adsorption are adopted to realize this ambitious goal . However, most of the aforementioned approaches often involve high requirement of equipment, expensive chemical reagents, and complex procedures, and even will cause secondary pollution and other risks.…”

A Feasible Strategy for Calculating the Required Mass Transfer Height of a New Bubbling Organic Liquid Membrane Extraction Tower Directly Based upon the Experimental Kinetic Data

“…Therefore, discharge of heavy metal wastewater into soil and water is strictly prohibited in many countries. Up to now, many methods have been reported effective to remove heavy metal ions from industrial wastewater, such as chemical precipitation, , ion-exchanging, − adsorption, − membrane filtration, − electrochemical treatment − and bioremediation. − However, none of them was aimed to treat the wastewater as a useful resource of heavy metals for their recovery, separation, and reuse. The main difficulty those techniques have to face is that the processing cost and efficiency were not so satisfied due to extremely low concentrations of heavy metal ions in wastewater .…”