The Effect of Humic Acid and Silicic Acid on P Adsorption by Amorphous Minerals

Hanudin, Eko; Sukmawati, St.; Radjagukguk, Bostang; Yuwono, Nasih Widya

doi:10.1016/j.proenv.2014.03.051

Cited by 16 publications

(19 citation statements)

References 15 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…According to many others studies; the clays had a high affinity to adsorb the phosphate (Bratieres et al 2008;Chang et al 2010). The adsorption of phosphate anion is maybe performed by silanol functional groups on the clay surface specially on the calcite surface at alkalize solution (pH = 8.66) (Hanudin et al 2014;Cartes et al 2015) which was observed on IR spectra of our soil in 797.6 cm -1 . The principal adsorption mechanism is ligand anionic exchange involving the formation of inner sphere surface complexes (Hanudin et al 2014).…”

Section: Soil Characteristics and Adsorption Mechanism Investigationsupporting

confidence: 51%

“…The adsorption of phosphate anion is maybe performed by silanol functional groups on the clay surface specially on the calcite surface at alkalize solution (pH = 8.66) (Hanudin et al 2014;Cartes et al 2015) which was observed on IR spectra of our soil in 797.6 cm -1 . The principal adsorption mechanism is ligand anionic exchange involving the formation of inner sphere surface complexes (Hanudin et al 2014). In fact, clays are generally associated with (hydro) oxides (Jing et al 2010).…”

Section: Soil Characteristics and Adsorption Mechanism Investigationmentioning

confidence: 56%

“…Figure 5 shows the infrared spectral characteristics of soil samples of Kondar. The peak assignments in the spectra represented OH stretching vibration (3697.48; 3621.46; 3435.66 cm -1 ) (Li et al 2015;Saikia et al 2010), C-H stretching (2925.08 cm -1 ) (Li et al 2015), HOH deformation of the adsorbed water (2514.8348; 1798.7848; 1643 cm -1 ) (Saikia et al 2010;Hanudin et al 2014Hanudin et al ), carbonate stretching vibration (1453872.47 and 713. 02 cm -1 ) (Li et al 2015;Madejova et al 2001), P-O …”

Section: Coefficient Of Determination Analysismentioning

confidence: 96%

See 2 more Smart Citations

Effects of salts on phosphorus adsorption in alkalize Tunisian soil

Beji

Hamdi

Kesraoui

et al. 2017

Euro-Mediterr J Environ Integr

View full text Add to dashboard Cite

Many previous studies have been conducted in an attempt to determine phosphorus (P) adsorption in soil. Often, these studies cannot be compared, because the reports did not give a satisfactory characterization of the dynamics of soil P in saline conditions. In our experiment, three salts extracts (CaCl 2 , NaCl and KCl) with the same concentration (0.01 M) were used to determine the amount of P adsorption in Solonetz soil samples of the semi-arid areas of Kondar region (Tunisia). Also, we focused on the influence of contact time on P-Salts adsorption in the alkalize soil. The analytic data were approached from the following kinetics' models: pseudo first order, pseudo second order and Elovich model. Results obtained showed that salts addition increased significantly the amount of P adsorption with the following order of salts extracts (PCaCl 2 [ P-NaCl [ P-KCl [ P). The mechanism of phosphate ions adsorption by soil was studied using IR spectroscopy. Infrared spectral characteristics of the amorphous material indicated that the adsorption is due to exchange phenomena of phosphate ions with surface groups. It was also demonstrated that the addition of CaCl 2 salt caused a shift and an increase of OH, Si-O (Si-O-Si, Si-O-Al) and Al-OH absorption bands which favored the adsorption of P ions. Moreover, the second-order model was shown to be the best fit for describing phosphorus adsorption associated with different salts, as seen from the correlation coefficient R2 which ranged from 0.98 to 0.99.

show abstract

Section: Soil Characteristics and Adsorption Mechanism Investigationsupporting

confidence: 51%

Section: Soil Characteristics and Adsorption Mechanism Investigationmentioning

confidence: 56%

Section: Coefficient Of Determination Analysismentioning

confidence: 96%

See 1 more Smart Citation

Effects of salts on phosphorus adsorption in alkalize Tunisian soil

Beji

Hamdi

Kesraoui

et al. 2017

Euro-Mediterr J Environ Integr

View full text Add to dashboard Cite

show abstract

Section: Resultsmentioning

confidence: 96%

“…RE began to slightly decrease with increase of Si dosage when Si/P molar ratio was greater than 1.5. The result may be ascribed to the slight competitive adsorption effects of Si to P. 19 However, the inhibition effect of Si on P adsorption was only significant at a very low P concentration. 6 Some recent experimental results also pointed out that when dissolved silica was increased from 0.1 to 0.67 mmol L −1 , the P adsorption capacity of Fe (III) oxides decreased by 85.6%.…”

Section: Effects Of Si and Fe (Iii) Concentrations On P Removal By Bpmentioning

confidence: 99%

Phosphorus removal by marine bacterium enhanced with iron in the presence of silicon

Wang

Sun

Wang

et al. 2017

J of Chemical Tech & Biotech

View full text Add to dashboard Cite

BACKGROUND Seeking efficient phosphorus (P) removal methods is of great significance in both aspects of environmental protection and resource conservation. Silicon (Si) is always present in marine sediments and it contributes significantly to P removal by iron (Fe(III)) oxides. Marine microbes play the major role in marine biomineralization. The aim of this study was to investigate P removal performance by marine bacterium enhanced with Fe (III) in the presence of Si and the role Si played in the system. RESULTS The optimal Fe/Si/P molar ratio for P removal was 1:1.5:1. P removal efficiency was 47.79%, 96.02%, and 97.87% in systems of pure bacterial cultures, bacteria with Fe (III), and bacteria with Fe (III) and Si, respectively, at P of 30 mg L−1. Flocs and micro‐precipitates were formed around cells in P removal systems containing Fe (III) or Si. Moreover, the amount and size of flocs in systems containing Si were larger than those without Si. CONCLUSION P removal by marine bacterium enhanced with Fe (III) had good performance through precipitation and adsorption. Si was able to strengthen P removal ability and sludge settleability. This study can provide us with new insights into bacterial induced metal phosphate precipitate and into the marine P cycle. © 2017 Society of Chemical Industry

show abstract