New insights into the activity of green supported nanoscale zero-valent iron composites for enhanced acid blue-25 dye synergistic decolorization from aqueous medium

Synthesis and photocatalytic properties of three dimensional laminated structure anatase TiO2/nano-Fe0 with exposed (001) facets

“…Moreover, the presence of iron ions in an acidic environment can cause occulation, which will also increase the degradation efficiency. 64 As shown in Fig. 6a, for the 3D-TiO 2 /nano-Fe 0 photocatalyst, the degradation activity is low when it is in alkaline conditions.…”

“…In addition, the produced Fe 2+ in reaction system can react with photogenerated holes to form Fe 3+ , and then be converted back to Fe 2+ again when reacted with electrons, resulting in the prevention of hole-electron recombination and the increase in the total amounts of hydroxyl radicals. 64 The degradation efficiency of methylene blue with different catalyst and light source are tested and compared, and the results are shown in Fig. 8.…”

Nanocellulose: a bioadsorbent for chemical contaminant remediation

“…There are several conventional water treatment methods such as bio-sand, precipitation, reverse osmosis, biodegradation, photocatalysis, adsorptive ltration through ion exchange resins, active alumina and iron oxide can be used for removal of contaminants. [31][32][33][34][35][36][37][38][39][40][41][42] However, some of these techniques can only remove certain chemical contaminants. Although adsorption-ltration is oen the method of choice, chemical oxidation, membrane separation, liquid extraction, electrolytic treatment, electro-coagulation, electro-dialysis, electrochemical treatment, membrane technologies and adsorption onto activated carbons have also been used for many years to purify potable water.…”

Cellulose acetate based Complexation-NF membranes for the removal of Pb(II) from waste water

“…Ion exchange, chemical precipitation and electrochemical method, flocculation, photo-catalytic degradation, catalytic ozonation, coagulation these are not cost effective and exhibit incomplete removal of waste from water 16 . While adsorption methods are cost effective, they can be time consuming without external energy such as pressure 17 , 18 . To sum up, conventional processes have a drawback that they consume more time, energy and are costly in terms of operation and maintenance 16 , 19 , 20 .…”