Adsorption and Release of Micronutrients by Humin Extracted from Peat Samples

Characterization of humins from different natural sources and the effect on microbial reductive dechlorination of pentachlorophenol

“…These results are in line with the notion that humic materials of different origin exhibit heterogeneity in the Table 1. structural and compositional characteristics (Thomsen et al, 2002). The C/N ratio of humins ranges from 9.47 to 15.53, which is a narrow range at the lower end of values reported in other studies on humins from various soils (Tatzber et al, 2007;Goveia et al, 2013). The high H/C and O/C ratios in this study, is suggestive of a predominant aliphatic nature and a low degree of aromatic condensation in our humins, in line with other reports (Rice, 2001;Simpson et al, 2007).…”

Interactions between humin and potentially toxic metals: Prospects for its utilization as an environmental repair agent

“…Goveia et al [21] assessed the adsorption of humin by nutrients, and their results confirm this study. Therefore, one of the main characteristics to be evaluated in a material suitable for use in the decontamination of areas with high levels of contaminants is related to the determination of the concentrations retained by the material in situ, where real-world variables can directly affect the contaminant retention process.…”

“…The samples were characterized by NMR 13 C with crossed polarization (CP) and magic angle spinning (MAS) in a Bruker spectrometer, Avance III 400 MHz, with a rotation of 5 kHz, contact time of 2 ms, relaxation waiting time of 5 s and 11,000 scans [21].…”

“…The determination of the organic material (OM) content present in the humin samples was done in triplicate by gravimetry, burning 10.0 g of sample for 4 h at a temperature of 650 C [21].…”

Interaction Study Between Humin and Phosphate: Possible Environmental Remediation for Domestic Wastewater

“…After extraction, the humin (insoluble fraction) was separated by centrifugation and washed with an excess of distilled water to remove residual alkalinity and organic matter from the extraction process. Finally, it was dried in an oven at 55°C to constant weight (Goveia et al 2013).…”