Biosorption properties of Morus alba L. for Cd (II) ions removal from aqueous solutions

The present study evaluates the capacity of shrimp (Farfantepenaeus aztecus) head to remove toxic Ni(II) ions from aqueous solutions. Relevant parameters that could affect the biosorption process, such as shrimp head pretreatment, solution pH level, contact time and initial Ni(II) concentration, were studied in batch systems. An increase in Ni(II) biosorption capacity and a reduction in the time required to reach Ni(II) biosorption equilibrium was manifested by shrimp head biomass pretreated by boiling in 0.5 N NaOH for 15 min; this biomass was thereafter denominated APSH. The optimum biosorption level of Ni(II) ions onto APSH was observed at pH 7.0. Biosorption increased significantly with rising initial Ni(II) concentration. In terms of biosorption dynamics, the pseudo-second-order kinetic model described Ni(II) biosorption onto APSH best. The equilibrium data adequately fitted the Langmuir isotherm model within the studied Ni(II) ion concentration range. According to this isotherm model, the maximum Ni(II) biosorption capacity of APSH was 104.22 mg/g. Results indicate that APSH could be used as a low-cost, environmentally friendly, and promising biosorbent with high biosorption capacity to remove Ni(II) from aqueous solutions.

Section: Introductionmentioning

confidence: 99%

Nickel(II) biosorption from aqueous solutions by shrimp head biomass

Hernández-Estévez

Cristiani‐Urbina

2014

“…The high initial sorption phase was then followed by a gradual increase to approach equilibrium in about 60 min. Similarly, Noeline et al (2005) also a reported 60-min time for Pb adsorption equilibrium from an aqueous solution (10 mg L −1 ) by polymerized banana stem, and Serencam et al (2013) also reported a 60-min equilibrium time for Cd from 50 mg L −1 Cd solution with Morus alba L. pomace. In contrast, Tan and Xiao (2009) attained a quicker Cd adsorption equilibrium (in 30 min) when ground wheat stems were exposed to 22.5 mg L −1 Cd solution.…”

Section: Effect Of Contact Time and Initial Metal Concentrationmentioning

confidence: 73%

Removal of Cd, Cr, and Pb from aqueous solution by unmodified and modified agricultural wastes

Mahmood‐ul‐Hassan

Suthor

Rafique

et al. 2015

The adsorption of cadmium (Cd), chromium (Cr), and lead (Pb), widely detected in wastewater, by unmodified and modified banana stalks, corn cob, and sunflower achene was explored. The three agricultural wastes were chemically modified with sodium hydroxide (NaOH), in combination with nitric acid (HNO3) and sulfuric acid (H2SO4), in order to improve their adsorptive binding capacity. The experiments were conducted as a function of contact time and initial metal ion concentrations. Of the three waste materials, corn cob had the highest adsorptive capacity for Pb than Cr and Cd. The NaOH-modified substrates had higher adsorptive capacity than the acid modified samples. The chemical treatment invariably increased the adsorption capacity between 10 and 100 %. The Langmuir maximum sorption capacity (q m) of Pb was highest (21-60 mg g(-1) of banana, 30-57 mg g(-1) of corn cob, and 23-28 mg g(-1) of sunflower achene) and that of Cd was least (4-7 mg g(-1) of banana, 14-20 mg g(-1) of corn cob, and 11-16 mg g(-1) of sunflower achene). The q m was in the order of Pb > Cr > Cd for all the three adsorbents. The results demonstrate that the agricultural waste materials used in this study could be used to remediate water polluted with heavy metals.

“…The high initial sorption phase was then followed by a gradual increase to approach an equilibrium in about 60 min. Similarly, Noeline et al (2005) have also reported 60 min time for Pb adsorption equilibrium from an aqueous solution (10-10 mg/dm 3 ) by polymerized banana stem and Serencam et al (2013) reported 60 min equilibrium time for Cd from 50 mg/ dm 3 Cd solution with Morus alba L. pomace. While Tan and Xiao (2009) attained quicker Cd adsorption equilibrium (in 30 min) when ground wheat stems was exposed to 22.5 mg/dm 3 Cd solution.…”

Section: Effect Of Contact Time and Initial Concentrationsmentioning

confidence: 82%

Kinetics of cadmium, chromium, and lead sorption onto chemically modified sugarcane bagasse and wheat straw

Mahmood‐ul‐Hassan

Suthar

Rafique

et al. 2015

In this study, cadmium (Cd), chromium (Cr), and lead (Pb) adsorption potential of unmodified and modified sugarcane bagasse and ground wheat straw was explored from aqueous solution through batch equilibrium technique. Both the materials were chemically modified by treating with sodium hydroxide (NaOH) alone and in combination with nitric acid (HNO3) and sulfuric acid (H2SO4). Two kinetic models, pseudo-first order and pseudo-second order were used to follow the adsorption process and reaction fallowed the later model. The Pb removal by both the materials was highest and followed by Cr and Cd. The chemical treatment invariably increased the adsorption capacity and NaOH treatment proved more effective than others. Langmuir maximum sorption capacity (q m) of Pb was utmost (12.8-23.3 mg/g of sugarcane bagasse, 14.5-22.4 mg/g of wheat straw) and of Cd was least (1.5-2.2 mg/g of sugarcane bagasse, 2.5-3.8 mg/g of wheat straw). The q m was in the order of Pb > Cr > Cd for all the three adsorbents. Results demonstrate that agricultural waste materials used in this study could be used to remediate the heavy metal-polluted water.