Lala clam (Orbicularia orbiculata) shell as an eco-friendly adsorbent for Cd(II), Cu(II) and Pb(II) ions

Abstract

In this study, the effectiveness of lala clam (Orbicularia orbiculata) shell, a fishery waste, as an adsorbent for removal of Cd(II), Cu(II) and Pb(II) ions from contaminated water was evaluated by characterization and adsorption studies. The characterization study was performed using Field Emission Scanning Electron Microscopy (FESEM), Energy Dispersive X-ray (EDX) Spectroscopy and Fourier Transform Infrared (FTIR) Spectroscopy techniques. The effects of solution pH (pH 1.0 to 6.0), adsorbent dosage (0.125 to 0.750 g) and initial adsorbate concentration (10 to 200 mg/L) on adsorption capacity of lala clam shell were studied. The capability of lala clam shell to remove metal ions from aqueous solution was assessed in both single-and mix-metal systems. The adsorption equilibrium data were fitted to Freundlich and Langmuir isotherm models. At an optimum solution pH of 6.0 and initial metal ion concentration of 200 mg/L, the maximum adsorption capacity (Q max) values of Cd(II), Cu(II) and Pb(II) ions were determined as 66.66, 64.94 and 100.00 mg/g, respectively. The removal performance of lala clam shell (63.80 to 93.79%) for metal ions from battery manufacturing wastewater was comparable to that of three commercial activated carbons derived from olive tree wood (73.01 to 94.83%), coconut shell (68.10 to 95.17%) and bamboo (69.33 to 94.48%), which are commonly used for water treatment in Libya, Malaysia and Indonesia, respectively. The results obtained from this study suggest that lala clam shell exhibits a great potential to be used as an effective alternative to expensive adsorbents for water treatment.

A Critical Review of Snail Shell Material Modification for Applications in Wastewater Treatment

“…However, in recent years, the use of adsorbent materials from the sea has been focused on due to treatment efficiency as well as solving environmental problems [ 47 ]. Shrimp [ 48 , 49 , 50 ], crabs [ 51 , 52 ], oysters [ 53 , 54 ], snails [ 55 , 56 ], clams [ 57 , 58 ], fish bone [ 59 , 60 ], and other marine species [ 61 , 62 , 63 ] are used as highly effective adsorbents in the removal of wastes from water pollution.…”

Evaluation of the lead removal capacity by the adsorption process of Corbula trigona shell powder: modeling and optimization through reponse surface methodology

“…12,15 However, the adsorption of pollutants on biomaterials or mollusc shells has been recognized as an effective method due to their composition. [16][17][18] With this in mind, this study focused on Corbula trigona shell wastes for the treatment of mining wastewater by the adsorption method. Corbula trigona shells are natural and constitute an abundant waste at the edge of the Ivorian lagoons, especially the Aby lagoon, which can be valorized.…”

Economical and Eco-Friendly Adsorbent Derived from Coffee Waste for Efficient Adsorption of Methylene Blue: Characterization, Evaluation and Optimization Studies

“…Scientific studies pointed out that about 300-400 million tons of hazardous materials such as heavy metals, toxic sludge, solvents, chemicals, oil, synthetic dyes, acids and alkalis, salts, surfactants, industrial wastes and other hazardous substances are still end up into the environment every year [5]. As example, about 1200 million liters of colored wastewater resulting from textile industry are discharging every day in India [9], while 2531.67 million tons of wastewater were discharged by the mining operations in China in 2014 [10].…”

“…A number of available physicochemical processes have been established to remove hazardous chemicals from contaminated environment, which include ion exchange, chemical precipitation, electrochemical treatment, chemical oxidation and coagulation/flocculation, to remove such contaminants [4]. However, most of these processes are not economically and environmentally approaches due to highoperating cost, and have low efficiency to treat a wide range of pollutants, toxic by product formation, high chemical reequipment; they also generate a ton of secondary waste (sludge disposal) after removal process or even during the synthesis of adsorbents [7][8][9][10][11][12]. However, adsorption process is being seen as more promising for the long-term, as it is considered as environmental friendliness and economical process for the adsorptive uptake of hazardous and toxic substances from contaminated water with low energy consumption [7,9,13].…”