Add Publication

Natural and pyrogenic humic acids at Goethite and natural oxide surfaces interacting with phosphate

Publication Date - 2013-07-22 00:00:00

Publication Title : Natural and pyrogenic humic acids at Goethite and natural oxide surfaces interacting with phosphate

Publicationed By : Dr. Shamim Mia

Publication Publication Date : 2013-07-22 00:00:00

Publication Online Link : https://pubs.acs.org/doi/abs/10.1021/es400997n

Publication Description :

Fulvic and humic acids have a large variability in binding to metal (hydr) oxide surfaces and interact differently with oxyanions, as examined here experimentally. Pyrogenic humic acid has been included in our study since it will be released to the environment in the case of large-scale application of biochar, potentially creating Darks Earths or Terra Preta soils. A surface complexation approach has been developed that aims to describe the competitive behavior of natural organic matter (NOM) in soil as well as model systems. Modeling points unexpectedly to a strong change of the molecular conformation of humic acid (HA) with a predominant adsorption in the Stern layer domain at low NOM loading. In soil, mineral oxide surfaces remain efficiently loaded by mineral-protected organic carbon (OC), equivalent with a layer thickness of ≥∼0.5 nm that represents at least 0.1–1.0% OC, while surface-associated OC may be even three times higher. In natural systems, surface complexation modeling should account for this pervasive NOM coverage. With our charge distribution model for NOM (NOM-CD), the pH-dependent oxyanion competition of the organo-mineral oxide fraction can be described. For pyrogenic HA, a more than 10-fold increase in dissolved phosphate is predicted at long-term applications of biochar or black carbon.



Recent Publications

A STUDY ON THE FISH BIODIVERSITY OF LOHALIA RIVER OF BANGLADESH
CATCh COMPOSITION OF FISHES BY USING DIFFERENT TYPES OF FISHING  GEARS IN LOHALIA RIVER OF BANGLADESH
Livelihood Analysis of the Char Dwellers Using Capital Asset Framework
List of minor fruit varieties released from PSTU (Seed Dealer Registration No. SW/MoA/21848; Date: 30-6-2015)
Genotype distribution and allele frequencies of the genes associated with reproductive traits and hereditary disorders in Japanese native horses
Research Approach towards Formulating Research and Innovation Capacity Development Framework for Disaster Resilience in HEI of BD
Colon cancer
Land Use Changes in Chittagong Coast: Economic, Social and Environmental Impacts
EFFECTS OF PROBIOTICS AND PHYTOEXTRACTS ON GROWTH AND IMMUNOMODULATING PERFORMANCES OF BROILER CHICKENS
EVALUATION OF DIFFERENT PARAMETERS IN RELATION TO REPEAT BREEDING OF COWS AT THE COASTAL AREAS OF BANGLADESH