Removal of Lead and Arsenic Contaminated in Pom Nang Seaweed (Gracilaria fisheri) by Batch Desorption Method

Charuwan Khamkaew, Sontaya Manaboot


In this work, the removal of contaminated lead and arsenic in Pom Nang seaweed (Gracilaria fisheri) by batch desorption was studied in order that the amounts of both metal ions could be reduced to the standard levels of the community seaweed products. In the study, a variety of food additives, i.e. acetic acid, citric acid, sodium chloride, sodium bicarbonate, EDTA, and chitosan were used as desorbing agents. To find the optimal conditions for the removal of lead and arsenic, a number of experimental parameters such as the type of desorbing agent, concentration, elution volume and elution time were varied while the speed of orbital shaking and temperature were held constant. The results showed that EDTA at the concentration of 1.0x10-1 M was the most effective desorbing agent, giving the highest desorption efficiency in removing lead and arsenic in Pom Nang seaweed up to 79.94 and 98.04%, respectively, when using the elution volume of 75 mL and the elution time of 120 min. Under such conditions, the amounts of lead and arsenic in Pom Nang seaweed were reduced from 3.19 ± 0.10 to 0.64 ± 0.08 mg/kg-dried weight and from 4.60 ± 0.15 to 0.09 ± 0.01 mg/kg-dried-weight, respectively.


Keywords : lead, arsenic, Pom Nang seaweed, Gracilaria fisheri, batch desorption

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APHA, AWWA & WPCF. (1989). Part 1010 Introduction. Standard Methods for the Examination of Water and Wastewater, 17th Edition. (pp.1-5). American Public Health Association. Washington DC.

Bermond, A.,& Ghestem, J.P. (2001). Chapter 6 Kinetic Study of Trace Metal EDTA-Desorption from Contaminated Soils; Selim, H.M.; Spark, D.L. 1st Eds. Heavy Metals release in Soils. (pp.131-147). Taylor & Francis group.

Cavelo, E.F., Vega, F.A., & Andrade, M.L. (2008). Sorption and desorption of Cd, Cr, Cu, Ni, Pb and Zn by a Fibric Histosol and its organo-mineral fraction. Journal of Hazardous Materials, (159), 342-347.

Cervera, M.L., & Arnal, M.C. (2003). Removal of heavy metals by using adsorption on alumina or chitosan. Analytica and Bioanalytica Chemistry, (375), 820-825.

Charuwan, K., Lalitporn, W. & Abdullateep, S. (2017). Removal of inorganic arsenic species in seaweed Gracilaria fisheri by using typical edible eluents. KMUTNB: International Journal Applied Science and Technology, (Special Issue), 137-143.

Charuwan, K., & Sontaya, M. (2016). Determination of lead desorption from G.fisheri seaweed using edible eluents by Voltammetry at the Hanging Mercury Drop Electrode. Applied Mechanics and Materials, (855), 3-8.

Charuwan, K., & Sontaya, M. (2018). Extraction efficiency of lead (II) from seaweed Gracilaria fisheri with food additive extractants. In Proceeding The 2018 Pure and Applied Chemistry International conference (PACCON2018). (pp. AN6-AN10). The 60th Anniversary of His Majesty the King’s accession to the Throne International Convention Center, Hat Yai : Songkhla, Thailand.

Deng, L., Su, Y., Su, H., Wang, X., & Zhu, X. (2007). Sorption and desorption of lead(II) from wastewater by green algae Cladophora fascicularis. Journal of Hazardous Materials, (14), 220-225.

Hammaini, A., González, F., Ballester, A., Blázquez, M.L., & Muñoz, J.A. (2007). Biosorption of heavy metals by activated sludge and their desorption characteristic. Journal of Environmental Management, (84), 419-426.

Jalali, R., Ghafourian, H., Asef, Y., Davarpanah, S.J., & Sephehr, S. (2002). Removal and recovery of lead using nonliving biomass of marine algae. Journal of Hazardous Materials, (B92), 253-262.

Netten C.V., Cann S.A.H., Morley D.R., & Netten, J.P.V. (2000). Elemental and radioactive analysis of commercially available seaweed. Science Total Environment, 255, 169-175.

Niinae, M., Nishigaki, K., & Aoki, K. (2008). Removal of lead from contaminated soils with chelating agents. Materials Transactions, (49), 2377-2382.

Noriziah, M.H., & Ching, Y.C. (2000). Nutritional composition of edible seaweed Gracilaria changgi. Food Chem, 68, 69-76.

Mustafa, G., Singh, B., & Kookana, R.S. (2004). Cadmium adsorption and desorption behaviour on goethite at low equilibrium concentrations: effects of pH and index cations. Chemosphere, (57), 1325-1333.

Romero, J.B., Villanueva, R.D., & Montaño, M.N.E. (2008). Stability of agar in the seaweed Gracilaria eucheumatoides (Gracilariales, Rhodophyta) during post-harvest storage. Bioresource Technology, 99, 8151-8155.

Stirk, W.A., & Staden, J.V. (2002). Desorption of cadmium and the reuse of brown seaweed derived products as biosorption. Botanica Marina, (45), 9-16.

Verbych, S., Bryk, M., Chornokur, G., & Fuhr, B. (2005). Removal of copper(II) from aqueous solutions by chitosan adsorption. Separation Science and Technology. (40), 1749-1759.

Voudrias, E., Fytianos, K., & bozani, E. (2002). Sorption-Desorption isotherms of dyes from aqueous solutions and wastewaters with different sorbent materials. Global Nest: the International Journal, (4), 75-83.

Yuppadee, C. (2003). Biosorption of cadmium(II) and copper(II) by pretreated biomass of marine alga Gracilaria fisheri. Environmental Technology, (24), 1501-1508.

Yuppadee, C. (2004). Biosorption of lead and copper by biomass of marine alga. Songklanakarin Journal of Science and Technology, (5), 727-740

Zhou, J.L., Huang, P.L., & Lin, R.G. (1988). Sorption and desorption of Cu and Cd by macro algae and microalgae. Environmental Pollution, (101), 67-75.


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