Behavior of Aluminum Adsorption in Different Compost‐Derived Humic Acids

Abstract

Humic acid plays an important role in the distribution of heavy metals in the environment. The aims of this study were conducted to evaluate the spectroscopic characteristics and aluminum (Al) adsorption of humic acids which were extracted from four composts. The functional groups were determined by Fourier transform infrared spectroscopy (FTIR) and solid-state 13 C nuclear magnetic resonance spectroscopy ( 13 C-NMR). The results showed that the aromatic groups were all found in the humic acids of the four composts, and the surface of humic acids included carboxylic group, hydroxylic group, and amino group. The experiment of Al adsorption was described by Freundlich equation. It showed that the adsorption of Al by humic acid from compost of cattle manure was higher, but that from the compost of pig manure, lemon manure, tea manure in equal preparation was lower. The adsorptive behavior was different due to the interaction by functional groups (-OH and -COOH) with Al. These results can describe the fate and transportation of Al in the soil of different organic fertilizer.

Sorption Mechanism and Performance of Peat Soil Humin for Methylene Blue and <i>p</i>-Nitrophenol

“…As indicated in Table 1, humin is rich in -OH and -COOH functional groups and these groups, especially the -COOH group, has been known for a long time as the most reactive in attracting metal cations [18][19]. This finding has also been confirmed by more recent studies [16,20]. The amount of un-ionized -COOH functional groups in humic substances decreases with the increasing of medium pH.…”

Forms of Al in soil and soil solution in a long‐term fertilizer application experiment

“…Liming is a commonly applied soil treatment to restrict the occurrence of toxic aluminium forms ( Alvarez et al, 2012;Auxtero et al, 2012). Application of organic amendments also plays an important supporting role in immobilizing toxic Al ions by forming stable organic-mineral complexes involving aluminium and humic acids (Lin & Su, 2010;Qina et al, 2010).…”

The Role of Carboxyl and Hydroxyl Groups of Humic Acid in Removing AuCl₄^- from Aqueous Solution

“…The -COOH group as the most reactive functional group in attracting metal cations has been confirmed also by recent studies [11,28]. The amount of unionized -COOH functional groups in HAs decreases as the pH increases.…”

“…Humic acid (HA) comprises the fraction that is insoluble at low pH, fulvic acid (FA) is the fraction that is soluble over a wide pH range, and humin is the fraction that is insoluble at any pH value [9]. For the HA extracted from peat soil, its excellent performance as an adsorbent has been confirmed for a variety of metals, such as Ag(I) [10], Al(III) [11], Cd(II) [12][13], Cr(III) [14][15], Cu(II) [16][17], Fe(III) [18], Mn(II) [19] and Ni(II) [20]. This performance is even higher after immobilizing the HA on silica gel [21], chitin [15,20], chitosan [12,22] and bentonite [23].…”