Preparation of calcium oxalate—bromopyrogallol red inclusion sorbent and application to treatment of cationic dye and heavy metal wastewaters

Abstract

The present work provides a simple and valuable method for preparing the highly effective adsorbent. If a concentrated BPR wastewater was reused as the inclusion reactant, the sorbent will be low cost. By selecting the inclusion ligand with a special structure, we may prepare some particular functional materials to recover the valuable substances from seriously polluted wastewaters. The recommended method will play a significant role in development of advanced adsorption materials.

Milli-sized calcium alginate sorbent supporting the dye waste – calcium fluoride hybrid for adsorption of organic contaminants

“…anionic APRB. 17 Therefore, four cationic dyes: CR3R, BBBO, MB and EV were selected for investigating the adsorption performance and mechanism of the CFA material, where the concentration of the dyes was determined by spectrophotometry. From the curves in Fig.…”

The effects of copper ions on the catalytic degradation of azo dye acid chrome dark blue

“…The interaction between Cu 2+ and ACDB protected some groups in ACDB from the oxidation of active oxygen generated in UV-TiO 2 process and Fenton reagent process. Addition of Cu 2+ enhanced the formation of Cu(ACDB) 2 , which subsequently decreased the concentration of free ACDB and suppressed the catalytic degradation of ACDB. However, Cu 2+ didn't interfere with the generation of active oxygen and the adsorption of ACDB on TiO 2 particles surface.…”

“…Dyestuffs from the textile and photographic industries are becoming a major source of environmental contaminations [2,3]. Some conventional methods such as flocculation, reverse osmosis and activated carbon adsorption have been used to decolorize the textile wastewater [4].…”

Mesoporous maltose/calcium oxalate hybrid material with abundant reaction sites and its efficient Pb(ii) removal from diverse water bodies

“…For instance, calcium oxalate was modified using bromopyrogallol red and used to absorb heavy metals and dyes. 19 Calcium oxalate/calcium silicate hydrate adsorbent was prepared from blast furnace slag, which exhibited superior uptake capacities for Pb 2+ (2117 mg g −1 ) and Cd 2+ (1083 mg g −1 ). 20 Although, remarkable achievements have been made in the removal of Pb( ii ) using the modified calcium oxalate, its practical application in water treatment is limited due to the cumbersome preparation process and potential secondary environmental pollution.…”