Nickel adsorption by variable charge soils: effect of pH and ionic strength

Soares, Marcio Roberto; Casagrande, José Carlos; Mouta, Ernesto Rinaldi

doi:10.1590/s1516-89132011000100025

Cited by 30 publications

(13 citation statements)

References 46 publications

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“…The sorption of Ni 2+ showed a gentle increasing trend and reached its maximum (about 60%) at pH 6. This result was similar to that of Soares et al [30] who evaluated the effects of soil pH (ranged from 3 to 5) on Ni 2+ adsorption in Brazilian soils. Based on their results, the metal sorption increased (20-90%) when the pH was raised from 4 to 6.…”

Section: Resultssupporting

confidence: 90%

Valorization of Wasted Black Tea as a Low-Cost Adsorbent for Nickel and Zinc Removal from Aqueous Solution

Malakahmad

Tan

Yavari

2016

Journal of Chemistry

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Characteristics and efficiency of wasted black tea (WBT) were investigated as a low-cost sorbent in removal of Ni 2+ and Zn 2+ ions from aqueous solution. Initial findings showed WBT potential to be applied as an effective sorbent due to high concentrations of carbon and calcium and high porosity and availability of functional groups. Sorption dynamics were studied with varying pH, contact time, and adsorbent dose. Maximum percentages of metal ions removal were recorded at pH 5, contact time 250 min, and 20 g/L of adsorbent concentration. Binary metal sorption studies showed that Ni 2+ and Zn 2+ do not compete with each other for available sorption sites, so the adsorption trend in binary system appears similar to monocomponent metal adsorption. Evaluation of the isotherms confirmed that WBT has high value of adsorption capacity. Sorption data fitted well with both Freundlich and Langmuir models. In the optimum conditions, maximum capacity of WBT could reach up to 90.91 mg-Ni/g adsorbent and 166.67 mg-Zn/g adsorbent. This experiment demonstrated the ability of tea waste as an effective, sustainable, and low-cost adsorbent for removal of the heavy metal ions.

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Section: Resultssupporting

confidence: 90%

Valorization of Wasted Black Tea as a Low-Cost Adsorbent for Nickel and Zinc Removal from Aqueous Solution

Malakahmad

Tan

Yavari

2016

Journal of Chemistry

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“…The change of the nickel hydroxide species in the solution may hinder the metalbinding process. This trend is quite similar to that associated with nickel adsorption by functionalized montmorillonite and soil [26,27]. Fig.…”

Section: Effect Of Phsupporting

confidence: 84%

N-[3-(Trimethoxysilyl)propyl] ethylenediamine Functionalized Saponite as Adsorbent of Nickel from Aqueous Solution

Fatimah¹,

Yudha²

2017

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Surface modification of saponite clay by surface functionalization using N-[3-(Trimethoxysilyl)propyl]ethylenediamine was performed. This study of the physicochemical characteristics of modified saponite as a function of its functional compound content was investigated using XRD, a gas sorption analyzer, FTIR, TG analysis and SEM. It was observed that the content of N-[3-(Trimethoxysilyl)propyl]ethylenediamine increases the basal spacing (d001) of the saponite structure, which changes the specific surface area and surface profile of the solid. The study of nickel adsorption provides evidence of the increased adsorption capacity of the modified saponite. The adsorption follows pseudo-second order kinetics and fits the Langmuir, Temkin and Dubinin-Radushkevich (D-R) adsorption isotherms. Increased content of the modifying agent results in increased adsorption capacity. The material is reusable because regenerated materials retain greater than 90% of the adsorption capacity of fresh material.

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“…Frankia root nodules, more than leaves, concentrate Ni (Wheeler et al, 2001). The availability of Ni in soil is mainly variable by soil characteristics (Soares et al, 2011) and the effect of liming (Berton et al, 2006). Ni availability in soil is also reduced by increasing the base-cation saturation (BCS) which consequently raises the pH (Sreekanth et al, 2013), this is common for all cationic micronutrients.…”

Section: Introductionmentioning

confidence: 99%

Nickel Availability in Soil as Influenced by Liming and Its Role in Soybean Nitrogen Metabolism

et al. 2016

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Nickel (Ni) availability in soil varies as a function of pH. Plants require Ni in small quantities for normal development, especially in legumes due its role in nitrogen (N) metabolism. This study investigated the effect of soil base saturation, and Ni amendments on Ni uptake, N accumulation in the leaves and grains, as well as to evaluate organic acids changes in soybean. In addition, two N assimilation enzymes were assayed: nitrate reductase (NR) and Ni-dependent urease. Soybean plants inoculated with Bradyrhizobium japonicum were cultivated in soil-filled pots under two base-cation saturation (BCS) ratios (50 and 70%) and five Ni rates – 0.0; 0.1; 0.5; 1.0; and 10.0 mg dm-3 Ni. At flowering (R1 developmental stage), plants for each condition were evaluated for organic acids (oxalic, malonic, succinic, malic, tartaric, fumaric, oxaloacetic, citric and lactic) levels as well as the activities of urease and NR. At the end of the growth period (R7 developmental stage – grain maturity), grain N and Ni accumulations were determined. The available soil-Ni in rhizosphere extracted by DTPA increased with Ni rates, notably in BCS50. The highest concentrations of organic acid and N occurred in BCS70 and 0.5 mg dm-3 of Ni. There were no significant differences for urease activity taken on plants grown at BSC50 for Ni rates, except for the control treatment, while plants cultivated at soil BCS70 increased the urease activity up to 0.5 mg dm-3 of Ni. In addition, the highest values for urease activities were reached from the 0.5 mg dm-3 of Ni rate for both BCS treatments. The NR activity was not affected by any treatment indicating good biological nitrogen fixation (BNF) for all plants. The reddish color of the nodules increased with Ni rates in both BCS50 and 70, also confirms the good BNF due to Ni availability. The optimal development of soybean occurs in BCS70, but requires an extra Ni supply for the production of organic acids and for increased N-shoot and grain accumulation.

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Nickel adsorption by variable charge soils: effect of pH and ionic strength

Abstract: The effects of pH and ionic strength (I)

Cited by 30 publications

References 46 publications

Valorization of Wasted Black Tea as a Low-Cost Adsorbent for Nickel and Zinc Removal from Aqueous Solution

Valorization of Wasted Black Tea as a Low-Cost Adsorbent for Nickel and Zinc Removal from Aqueous Solution

N-[3-(Trimethoxysilyl)propyl] ethylenediamine Functionalized Saponite as Adsorbent of Nickel from Aqueous Solution

Nickel Availability in Soil as Influenced by Liming and Its Role in Soybean Nitrogen Metabolism

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