Optimization of process variables and mechanism of arsenic (V) adsorption onto cellulose nanocomposite

Synthesis of magnetically separable and recyclable magnetic nanoparticles decorated with β-cyclodextrin functionalized graphene oxide an excellent adsorption of As(V)/(III)

“…Ideally, the reagent had chosen should be cost effective and also should not damage the adsorbent bed, according to these perspective, some of the reagents have proved their worth in earlier adsorption studies [2,31]. Hence, in an alkaline medium As(V)/As(III) could be desorbed from the adsorbent surface as sodium arsenate (Na 2 AsO 4 − ) with 1.0 mol L -1 of NaOH in 5 mL.…”

“…The eluted As(V)/As(III) solution were collected separately, the process were undertaken, so as to minimize the direct disposal of higher concentration, after elution the problem of disposal which is an important issues to be taken into the consideration. To avoid the direct disposal of higher concentration of As(V)/As(III) in the laboratory sink, the eluate were diluted and utilized for the subsequent experiments studies [27,30,31].…”

“…The repetitive alkaline and acid treatment of the adsorbent surface could influence in the decrease of the adsorption efficiency beyond two cycles. This could be attributed to the decrease in the effective interaction between the adsorbent and the adsorbate due to the non-availability of active sites for adsorption [30,31] the adsorbent material could be re-used further with lesser adsorption efficiency.…”

Remediation of Arsenic Contaminated Water by a Novel Carboxymethyl Cellulose Bentonite Adsorbent

“…Numerous materials have been used as adsorbents, such as activated carbon, fly ash, clays, muds, various oxides, polymeric resins, biomaterials, composites, etc. In the last three years, many novel adsorbents have been reported for efficient arsenic removal including zeolitic imidazolate framework-8 (ZIF-8) (Liua et al, 2018), graphene oxide@iron aluminium oxide composite (Majia et al, 2018), α-FeOOH decorated graphene oxide-carbon nanotubes aerogel (Fu et al, 2017), magnetite submicroparticles (Mejia-Sentillan et al, 2018), cerium loaded cellulose nanocomposite (Santra and Sarkar, 2016), iron oxyhydroxide on the root powder (Lin et al, 2018), etc. There is a pronounced tendency that adsorbents should be more economic.…”

Synthesis and performance of graphene and activated carbon composite for absorption of three-valance arsenic from wastewater

“…. There are various methods for the adsorption or removal of arsenic from contaminated water sources, the most important of which are chemical deposition [2], reduction by electron ultrafiltration [3], ion exchange [4], and absorption process [5]. Among these approaches, the absorption method is more cost-effective, efficient, and easy-to-absorb, and extensive studies on the absorption of arsenic by adsorption processes have been reported .…”