A study on the removal characteristics of organic and inorganic pollutants from wastewater by low cost biosorbent

Abstract

E NVIRONMENTAL pollution has turned out to be one of the serious problems for human , animals and environment at present because of acute toxicities and carcinogenic nature of the pollutants. A lot of organic and inorganic contaminations have been reported in water for example phenol, dyes and heavy metal toxic ions. Pomegranate peels were used as low cost biosorbent to remove organic (phenol& cationic and anionic dyes ) and inorganic(Ni 2+ ) pollutants from industrial wastewater. The main goal of this work is to prepare a low cost acid activated carbon from waste pomegranate peels by thermal and acid activation. Two forms of these peels, dried powder (PP) and Activated carbon (ACPP) were used. ACPP are characterized by different techniques such as IR, XRD, surface area and approximate & elemental analysis. Adsorption process is occurred under some environmental conditions such as pH, temperature, initial concentration, dose of adsorbent and contact time.The Removal percent for the adsorption of all pollutants were (86.79, 84.15, 83.02, 81.44 %) for MB, Mo, Ni 2+ ,ph on acid activated carbon.Adsorption capacity of ACPP more than PP. Biosorption procedure was tested on the basis of isotherm and kinetic models . Thermodynamic parameters such as the changes of free energy, enthalpy, and entropy were also calculated. The results showed that the adsorption of dyes, phenol and metal onto surface of ACPP was an endothermic process that could be fitted with the Freundlich adsorption model and pseudosecond order model. The activated carbon could be regenerated and used for 3 adsorption desorption cycle until sorbtion capacity reach to less than 50% than initial sorption capacity.

Bio Adsorbent Lemon Peels Charcoal to Remove Fe (III) from Water Sources

“…As the adsorbent dosage rose, more surface area and active sites became available for adsorption. Because it added unavailable sites, the higher adsorbent dosage had no effect on adsorbate absorption until adsorption achieved equilibrium [23,24]. Moreover, the equilibrium concentration of Fe(III) was lower even though increasing the adsorbent dosage increased the interference of the adsorbent surface among the active groups.…”

A Review on Adsorption of Heavy Metals from Wood-Industrial Wastewater by Oil Palm Waste

“…Such equilibrium model was called isotherm (Gableman, 2017). The analysis of the isotherm data is important to develop an equation that accurately represents the results and which could be used for design purposes (Elsayed et al, 2020). The Langmuir and Freundlich isotherms were two common isotherms used in the adsorption's studies ( Table 3).…”

“…The pH is the most susceptible parameter in the adsorption studies due to the fact that H + is a strongly competing adsorbent. The pH affects the specification of metal ions and the ionization of surface functional groups (Elsayed et al, 2020). In addition, pH is considered to play a vital role inside the adsorption system, especially in the aqueous solution, since it affects the character of each ion to be removed and the adsorbents (where the adsorption phenomena disappear and change to precipitation when the pHs is set to more than 7) (Saeed et al, 2020).…”

“…The effect of the adsorbent mass usually determined the capacity of a solid adsorbent for a certain concentration of adsorbate in a solution. The availability of the exchange sites or surface area may contribute on the effect of adsorbent dose toward the adsorption capacity (Elsayed et al, 2020;Mahmudi et al, 2020). Table 6 shows the effect of adsorbent dose on removal capacity of heavy metals from previous study.…”

Nanoadsorbents for wastewater treatment: next generation biotechnological solution

“…Therefore, water quality preservation and improvement become a serious concern for scientists, water regulatory authorities and governmental agencies (Ali et al 2012). Generally, the water pollutants are classified as inorganic, organic and biological pollutants (Gupta et al 2012;Ali et al 2019;Elsayed et al 2019;Karimi-Maleh et al 2020).…”