INTRODUCTION A synthetic water-soluble meso-tetra(2,6-dichloro-3-sulfonatophenyl)porphyrinate of iron(III) chloride, Fe-(TDCPPS)Cl, was employed to catalyze the oxidative co-polymerization of penta-halogenated phenols in two humic materials of different origin. MATERIALS AND METHODS Co-polymerization of pentachlorophenol (PCP) was followed by high-performance size-exclusion chromatography (HP...

Abstract. In our previous studies, we filtered out fungus (Trichoderma reesei) to have the best ability transform corn straw into a humic-acid-like substance through laboratory incubation experiments. order further verify former findings, set up 360 d field experiment that included three treatments applied under equal carbon (C) mass: (i) returned (CS), (ii) fermented treated with Trichoderma r...

ABSTRACT The growth of swine production in Brazil has increased the amount and use pig slurry (PS) as soil fertilizer. This product provides nutrients to plants, a continuous application this residue usually increases total organic carbon (SOC) content. objective study was determine SOC content its distribution into humic substance fractions (humic acids, fulvic humin) an Oxisol annually fertil...

Vermitechnology is an effective composting method, which transforms biomass into nutrient-rich organic fertilizer. Mature vermicompost is a renewable organic product containing humic substances with high biological activity. The aim of this study was to assess the chemical characteristics and the bioactivity of humic acids isolated from different vermicomposts produced with either cattle manure...

Humic acids are generally defined operationally as those decomposir tion products of plants and animals that comprise the base-soluble, 2 acidand alcohol-insoluble fractions of the soil. These materials are of interest because of their geological significance, possible nutritive properties, involvement of biological processes, and the challenge 3 afforded by their chemical and structural comple...

Cultures of the pyrene degrading Mycobacterium sp. KMS were incubated with [4-13C]pyrene or [4,5,9,10-14C]pyrene with and without a soil humic acid standard to characterize the chemical nature of the produced residues and evaluate the potential for bonding reactions with humic acid. Cultures were subjected to a "humic acid/ humin" separation at acidic pH, a duplicate separation followed by solv...

Currently with the progression of the pollution in water sources, considerable attention has been given to the application of membrane filtration technology using microfiltration or ultrafiltration membranes to the surface water treatment as an alternative to conventional coagulation sedimentation and sand filtration. The microfiltration and ultrafiltration membranes are appropriate for complet...

A class of organic molecules extracted from atmospheric aerosol particles and isolated from fog and cloud water has been termed HUmic-LIke Substances (HULIS) due to a certain resemblance to terrestrial and aquatic humic and fulvic acids. In light of the interest that this class of atmospheric compounds currently attracts, we comprehensively review HULIS properties, as well as laboratory and fie...

The sorption behaviour of divalent cations M2+ (Cu, Pb and zn) and trivalent cations M3+ (Fe, Al) with humic acid isolated from oxidized coal (Hazro,se Anatolia,Turkey) was followed in aqueous solution. Coal humic acid and metal ion interaction was investigated with special emphasis on the effects of pH, metal ion concentration and humic acid concentration. it has been found that the interactio...

High cation exchange capacity and organic matter content of crude humic substances from compost could be exploited to reduce ammonia loss from urea and to as well improve rice growth and soil chemical properties for efficient nutrients utilization in lowland rice cultivation. Close-dynamic air flow system was used to determine the effects of crude humic substances on ammonia volatilization. A p...