Competitive Sorption of Antimony with Zinc, Nickel, and Aluminum in a Seaweed Based Fixed‐bed Sorption Column

Abstract

The removal of heavy metals such as Ni(II), Zn(II), Al(III), and Sb(III) from aqueous metal solutions was investigated using novel, cost effective, seaweed derived sorbents. Studies with a laboratory scale fixed-bed sorption column, using a seaweed waste material (referred to as waste Ascophyllum product (WAP)) from the processing of Ascophyllum nodosum as biosorbent, demonstrated high removal efficiencies (RE) for a variety of heavy metals including Ni(II), Zn(II) and Al(III), with 90, 90 and 74% RE achieved from initial 10 mg/L metal solutions, respectively. The presence of Sb(III) in multi component metal solutions suppressed the removal of Ni(II), Zn(II) and Al(III), reducing the RE to 28, 17 and 24%, respectively. The use of Polysiphonia lanosa as a biosorbent showed a 67% RE for Sb(III), both alone and in combination with other metals. Potentiometric and conductometric titrations, X-ray photoelectron and mid-infrared spectroscopic analysis demonstrated that carboxyl, alcohol, sulfonate and ether groups were heavily involved in Sb(III) binding by P. lanosa. Only carboxyl and sulfonate groups were involved in Sb(III) binding by WAP. Furthermore, a greater amount of weak acidic groups (mainly carboxylic functions) were involved in Sb(III) binding by P. lanosa, compared to WAP which involved a greater concentration of strong acidic groups (mainly sulfonates).

The Mechanism of Heavy Metal Biosorption on Green Marine Macroalga Enteromorpha linza

“…The preferential sorption order of Pb > Cd > Ni onto E. linza could be explained by some metal properties, such as ionic radii, electronegativity, and softness. This was also supported by Bakir et al [9] that algal polysaccharides with carboxylate groups show preferential binding of cations with large ionic radii. The Langmuir parameters q m (maximum sorption capacity, mg g À1 ) and b (Langmuir intensity constant, L mg À1 ) for Ni, Cd, and Pb are presented in Table 2).…”

“…These biomass types include fungi [1,2], bacteria [3,4], and algae [5][6][7][8]. Among them, marine algae divided into three broad groups as green, red, and brown are considered to be the highest potential for heavy metal removal due to their high uptake capacities [9][10][11][12].…”

Physicochemical Characterization and Use of Heat Pretreated Commercial Instant Dry Baker's Yeast as a Potential Biosorbent for Cu(II) Removal

“…Copper stock solution of 1000 mg L À1 was prepared by dissolving CuSO 4 · 5 H 2 O (Merck, Germany) of analytical reagent grade into distilled water. Copper solutions of different concentrations (10,25,50,100,150,200, and 250 mg L À1 ) were obtained by diluting the stock solution. The pH of the solutions was adjusted with 0.1 M H 2 SO 4 or 0.1 M NaOH solutions.…”

“…The use of eco‐friendly, low‐cost biomaterials, such as bacteria, fungi, yeast, marine algae, agricultural waste, plants, and/or animal origin by‐products as biosorbents for heavy metals ions offers a potentially inexpensive alternative compared to the conventional methods used for heavy metals decontamination from waters and wastewaters .…”

Regeneration and Reuse of a Seaweed‐Based Biosorbent in Single and Multi‐Metal Systems

“…FTIR, XPS and potentiometric titrations showed that carboxylic and sulfonate groups were especially involved. It was also shown that WAP contained a large number of acidic groups (3.63 mmol/g) with pKa values close to neutrality [16]. It was reported that the interaction between cations in solution and algal biomass may be attributed to the carboxyl groups of the alginic acid, being the principal structural polysaccharide in brown algae [17].…”