Humic acid

The significance of dissolved organic matter (DOMs) in membrane fouling has been also increasingly noted in desalination plants using reverse osmosis (RO) and nanofiltration (NF). Nevertheless, little information is available on the interactions between DOM and other foulants such as inorganic scale

The behavior of various iron species (e.g. ferrous, prehydrolyzed(ph)-ferrous ion and ferric ion) as a coagulant and effects of inert mineral on the coagulation process combined with direct microfiltration (MF) membrane process was studied for humic acid (HA) removal. When 0.01 mM to 1 mM of the var

Data are presented from a series of laboratory experiments designed to evaluate separation performance and humic acid fouling for two RO membranes treating brackish water at temperatures of 15, 25, and 35°C. A model is proposed that considers changes only to solute and solvent properties. Model resu

Influence of dissolved organic carbon (DOC) on the quantitative estimation of Pu-239+240 in the groundwater was investigated. Impact of DOC in the range of 5–30 ppm was studied in solutions which were directly taken from different wells, whereas to conduct the experiment at the elevated level of DOC

In this study fixed-bed sorption filters are filled with an iron based sorbent (ferrosorp plus, FP) and used to remove a range of heavy metals (i.e. As, Cd, Cr, Cu, Ni, and Zn) from polluted water. It is found that FP is very effective at simultaneous removal of the heavy metals, and the magnitude o

Humic acids are primarily a result of the microbiological degradation of surrounding vegetation and animal decay and enter surface waters through rain water run-off from the surrounding land. This often gives rise to large seasonal variations, high concentrations in the wet season and lower concentr

Fouling of UF membranes by humic acid particles was studied. Six types of UF membranes namely PAN 20 kDa (Rhone-Poulenc), PAN 100 kDa (Osmonics), PES 150 kDa (Microdyn-Nadir) and PS 10, 50 and 100 kDa (Permionics) were tested. Analysis of the results showed that the resistance due to the adsorption

The evaluation of a chemical (sodium dodecyl sulfate, SDS) and a natural (humic acid) surfactant, in order to enhance the electrokinetic removal of cadmium from contaminated soil has been investigated in this study. SDS was used either for soil washing as well as purging solution. When SDS was used

Humic substances mainly humic acids constitute the major fraction of natural organic matter in water supplies. Humics express diverse actions primarily related to the formation of potentially harmful disinfection by products (DBPs). Therefore, the removal of DBP precursors through numerous treatment

The photocatalytic removal of model humic and fulvic acids of different origins (terrestrial and aquatic) was investigated using TiO2 Degussa P-25 as the photocatalyst. The results were presented comparatively based on pseudofirst-order and the Langmuir–Hinshelwood kinetic models. The reaction rates