Co-transport and co-release of Eu(III) with bentonite colloids in saturated porous sand columns: Controlling factors and governing mechanisms

Co-transport of ferrihydrite–organic matter colloids with Sb(v) in saturated porous media: implications for antimony mobility

“…The higher the R f , the weaker the Sb( v ) mobility. 53 For instance, the R f values observed at 1 mg C per L HA, pH 4.5, and 50 mg L −1 FH were higher than those of other experimental groups (712.4 > 684.5 and 1.9, 2084.0 > 3.1 and 2.3, 3.6 > 1.9), which was consistent with experimental results. The parameters β and ω represent the dimensionless fraction of instantaneous retardation and mass transfer coefficient, respectively.…”

“…This observation indicated that the retention of FH–HA–Sb( v ) colloids was increased with increasing FH concentration due to electrostatic attraction between FH–HA–Sb( v ) colloids and porous media (Table 1). 53 The XDLVO interaction energy calculation showed that the repulsive energy barriers significantly decreased until completely disappeared with increasing FH concentrations from 0 to 50 mg L −1 (Fig. 6b).…”

“…Text S7† shows the chemical nonequilibrium model which can fit Sb( v ) transport and retention reasonably and Table 3 lists the corresponding model-fitted parameters ( R f , K d , β , and ω ). 53 Kinetic adsorption sites, including instantaneous equilibrium adsorption sites (site 1) and first-order kinetic adsorption sites (site 2) were considered.…”

Fäkaler Mikrobiota Transfer (FMT) bei Kindern und Jugendlichen – Review und Stellungnahme der GPGE AG Mikrobiom

“…FMT ist innerhalb Europas nicht einheitlich reguliert, dennoch sollte freiwillig gespendeter Stuhl gemäß der durch die EU-Kommission erstellten Standards [52] gesammelt, verarbeitet und eingesetzt werden [10,53]. Gemäß den Empfehlungen der multidisziplinären United European Gastroenterology (UEG) Arbeitsgruppe zur Standardisierung von Stuhlbanken für FMT innerhalb Europas sollte ein Organisationsplan zu geplanten Aktivitäten und eingesetztem Personal und ein geschützter Datenspeicher zur Rückverfolgung einer Stuhlspende vom Empfänger zum Spender bestehen [10].…”