Evaluation of lead and COD removal from lead octoate drier effluent by chemical precipitation, coagulation–flocculation, and potassium persulfate oxidation processes

Synthesis of sewage sludge‐based carbon/TiO2/ZnO nanocomposite adsorbent for the removal of Ni(II), Cu(II), and chemical oxygen demands from aqueous solutions and industrial wastewater

“…The maximum permissible limits for Ni(II), Cu(II), and COD in water are 0.2 mg/L, 2 mg/L, and 200 mg/L, respectively (Sponza & Karaoǧlu, 2002). Several methods including coagulation (Shahriari, Bidhendi, Mehrdadi, & Torabian, 2014), advance oxidation processes (Marinho, Cristóvão, Boaventura, & Vilar, 2019), flotation (Deliyanni, Kyzas, & Matis, 2017), ion exchange (Siu, Koong, Saleem, Barford, & McKay, 2016), precipitation (Rabii, Bidhendi, & Mehrdadi, 2012), solvent extraction (Kul & Oskay, 2015), membrane filtration (Yurekli, 2016;Zhu, Sun, Gao, Fu, & Chung, 2014), adsorption (Abbas et al, 2016;Inyang et al, 2016;Jain, Garg, Kadirvelu, & Sillanpää, 2016;Sarma, Gupta, & Bhattacharyya, 2019;Sizirici et al, 2018), and biological processes (Gunatilake, 2015) have been used for the removal of toxic materials from wastewaters. Among them, the adsorption process as an effective economical method has been reported for the removal of heavy metal ions and COD from aqueous solutions (Inyang et al, 2016;Jain et al, 2016).…”

Fabrication of hydroxyapatite/chitosan porous materials for Pb(ii) removal from aqueous solution

“…5,6 Various techniques such as ion exchange, reverse osmosis, membrane ltration, phytoextraction, conventional coagulation, precipitation and electrochemical treatment have been developed to remove heavy metal ions from aqueous solutions. [7][8][9][10][11][12][13][14] However, the above methods are not widely used in industrial applications due to their high cost, especially for the removal of heavy metals with low concentrations. Fortunately, adsorptive separation is considered as an effective and economic method to remove heavy metals.…”

Mesoporous titanate-based cation exchanger for efficient removal of metal cations

“…Up to now, various techniques including chemical precipitation, electrodialysis, sorption (adsorption and ion exchange), liquid-liquid extraction, cementation, coagulation/occulation, and membrane ltration have been developed for the removal of metal cations from aqueous solutions. [5][6][7] Among these techniques, sorption processes have received considerable interest due to their high removal efficiency, easy handling, recovery of metal value, selectivity, and the availability of different adsorbents. 8,9 Compared to the wide use of organic resins in ion exchange processes, the major attraction for the use of inorganic ion exchangers in such applications is their good chemical and thermal stability, as well as the fact that they do not generate secondary organic contaminants.…”