Maqola

Thermodynamic and Mechanistic Investigation of Cadmium Adsorption Using Polystyrene Sulfonate and Succinic Anhydride Functionalized Silica Nanoparticles

Rashed Abu HammourFaculty of Technical Education, Hourani Center for Applied Scientific Research, Al-Ahliyya Amman University, Amman, JordanGafur AbdulakimovSchool of Natural Sciences, National Pedagogical University of Uzbekistan named after Nizami, Tashkent, UzbekistanDilipkumar S. PatelBashar Mahmood AliDepartment of Medical Device Technologies, College of Technical Engineering, The Islamic University, Najaf, IraqMohammed Hussein AliDepartment of Medical Device Technologies, College of Technical Engineering, The Islamic University, Najaf, IraqDhirendra Nath ThatoiDepartment of Mechanical Engineering, Siksha 'O' Anusandhan (Deemed to be University), Bhubaneswar, Odisha, 751030, IndiaHarjot Singh GillDepartment of Mechanical Engineering, Chandigarh University, Mohali, Punjab, IndiaAhmad AbumalekFaculty of Engineering, Balkh University, Balkh, Afghanistan

2026en

Ochiq kirishGibrid

Litsenziya: cc-by

Manbada oʻqishdoi.org(yangi oynada ochiladi)

ABI

Annotatsiya

The persistent contamination of aquatic ecosystems by toxic heavy metals, particularly Cd(II), poses a critical threat to global environmental stability and human health. This study aims to synthesize and evaluate advanced, surface-functionalized silica nanoparticles designed to maximize the sequestration efficiency of Cd(II) ions from aqueous environments. To achieve this, bare silica (SiO 2 ) nanoparticles were fabricated via a sol-gel process and subsequently functionalized with poly(styrene sulfonate) to create SPSS, and with (3-aminopropyl) triethoxysilane followed by succinic anhydride to produce SAPTESS. The physicochemical properties of the synthesized nanomaterials were comprehensively characterized, and their adsorptive performance was quantified through systematic batch equilibrium studies under varying adsorbate concentrations and thermal conditions. Structural characterization confirmed the successful grafting of the organic domains onto the highly amorphous SiO 2 core, yielding colloidal suspensions with excellent stability in 250 ppm concentration governed by highly negative surface charges. Equilibrium isotherm modeling demonstrated superior statistical convergence with the Langmuir framework, indicating that solute uptake is well-described by homogeneous monolayer adsorption across energetically uniform active sites. The surface modifications profoundly enhanced the maximum theoretical adsorption capacity, elevating it from 153.66 mg/g for the pristine SiO 2 to 170.88 mg/g and 199.41 mg/g for the SAPTESS and SPSS composites, respectively. Furthermore, thermodynamic profiling revealed the exothermic nature of the sequestration process, with the SPSS architecture demonstrating acceptable operational resilience across elevated thermal gradients up to 95 °C. In summary, the transition from the weak electrostatic binding of bare silica and ion-exchange mechanisms of the functionalized derivatives establishes these nano adsorbents as an acceptable adsorbent for heavy metal ions.

Hali tarjima qilinmagan

Identifikatorlar

DOI: 10.1016/j.mtcomm.2026.116614

Iqtiboslar va manbalar

0 ta iqtibos36 ta foydalanilgan manba