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Adsorption of methyl violet from aqueous solution using gum xanthan/Fe3O4 based nanocomposite hydrogel

Author: Mittal, H ; Kumar, V ; Saruchi ; Ray, Suprakas S Date: Aug 2016 This research paper reports the utilization of gum xanthan-grafted-polyacrylic acid and Fe(sub3)O(sub4) magnetic nanoparticles based nanocomposite hydrogel (NCH) for the highly effective adsorption of methyl violet (MV) from aqueous solution. ... Read more
Adsorption of phosphate from municipal effluents using cryptocrystalline magnesite: complementing laboratory results with geochemical modelling

Author: Masindi, Vhahangwele ; Gitari, WM ; Pindihama, KG Date: Nov 2015 The use of low-cost and locally available material in the treatment of wastewater has recently become an issue of interest, and magnesite as a low-cost material has been used for the removal of heavy metals in wastewater and has also shown ... Read more
Defluoridation of drinking water using Al3+-modified bentonite clay: Optimization of fluoride adsorption conditions

Author: Vhahangwele, M ; Mugera, GW ; Tholiso, N Date: Nov 2014 Al(sup3+)-bentonite clay (Alum-bent) was prepared by ion exchange of base cations on the matrices of bentonite clay. Intercalation of bentonite clay with Al(sup3+) was performed in batch experiments. Parameters optimized include time, dosage, ... Read more
Effective removal of cationic dyes from aqueous solution using gum ghatti-based biodegradable hydrogel

Author: Mittal, H ; Maity, Arjun ; Ray, SS Date: Aug 2015 Biodegradable hydrogels of gum ghatti (Gg) with a co-polymer mixture of acrylamide (AAm) and methacrylic acid (MAA) (termed as Gg-cl-P(AAm-co-MAA)) were synthesised by microwave-assisted free radical graft co-polymerisation technique. The ... Read more
Evaluation of the efficacy of halloysite nanotubes in the removal of acidic and basic dyes from aqueous solution

Author: Ngulube, T ; Gumbo, JR ; Masindi, Vhahangwele ; Maity, Arjun Date: Jun 2019 The present work describes the removal of Direct Red 81, Methyl Orange, Methylene Blue and Crystal Violet from aqueous solution using halloysite nanotubes. The clay mineral was physicochemically characterized using various methods. The ... Read more
Kinetics and equilibrium studies for removal of fluoride from underground water using cryptocrystalline magnesite

Author: Masindi, Vhahangwele ; Gitari, WM ; Ngulube, T Date: Sep 2015 In the present study, the defluoridation capabilities and adsorption mechanisms of cryptocrystalline magnesite were evaluated. All experiments were done by batch procedure. Conditions assessed include time, dosage, concentration, pH and the ... Read more
Kinetics and isotherms of a genetically engineered saccharomyces cerevisiae EBY100 strain expressing palladium binding peptides for the biosorption of Pd (II) in a batch reactor

Author: Mashangoane, BF ; Chirwa, EN ; Mahlathi, Christopher D Date: May 2023 Palladium is a rare platinum group metal concentrated in the Earth's core and mantle; because of its scarcity, its waste recovery and reuse options are economically appealing. Traditional strategies for extracting PGMs from effluents have a ... Read more
The potential of ball-milled South African bentonite clay for attenuation of heavy metals from acidic wastewaters: Simultaneous sorption of Co(sup2+), Cu(sup2+), Ni(sup2+), Pb(sup2+), and Zn(sup2+) ions

Author: Vhahangwele, M ; Mugera, GW Date: Dec 2015 Adsorption of Co(sup2+), Cu(sup2+), Ni(sup2+), Pb(sup2+), and Zn(sup2+) by bentonite clay from polycationic solution was investigated. Mineralogical composition of clay was done using X-ray diffraction (XRD), elemental composition using X-ray ... Read more
Removal of arsenic from wastewaters by cryptocrystalline magnesite: complimenting experimental results with modelling

Author: Masindi, Vhahangwele ; Mugera Gitari, W Date: Feb 2016 Availability of arsenic in waterbodies has posed devastating impacts to terrestrial and aquatic organisms. As such, prudent and pragmatic technologies need to be developed to troubleshoot and solve the problem of arsenic in aquatic ecosystems. ... Read more
Removal of boron from aqueous solution using cryptocrystalline magnesite

Author: Masindi, Vhahangwele ; Gitari, MW Date: May 2016 The present study aimed to evaluate the efficiency of using cryptocrystalline magnesite to remove boron ions from aqueous systems. Batch experimental protocols were used to evaluate the adsorption capacity of magnesite for boron. Parameters ... Read more
Selective removal of Cr(VI) from aqueous solution by polypyrrole/2,5-diaminobenzene sulfonic acid composite

Author: Kera, Nazia H ; Bhaumik, M ; Ballav, N ; Pillay, K ; Ray, Suprakas S ; Maity, Arjun Date: Aug 2016 A polypyrrole/2,5-diaminobenzenesulfonic acid (PPy/DABSA) composite, synthesised by the in situ oxidative polymerization of pyrrole in the presence of DABSA, was studied as an adsorbent for the removal of Cr(VI) from aqueous solution. The ... Read more
Simultaneous sorption of As, B, Cr, Mo and Se from coal fly ash leachates by Al(sup3+)-pillared bentonite clay: implication for the construction of activated geo-synthetic clay liner

Author: Masindi, Vhahangwele ; Mugera, GW ; Tutu, H Date: Mar 2017 The present study reports the optimum conditions for intercalating the Al(sup3+) species to bentonite clay matrices and evaluate the potential of using Al(sup3+)-modified bentonite clay (Alum-Bent) for removal of oxyanionic species of As, B, ... Read more
Synthesis of nanocomposite of cryptocrystalline magnesite-bentonite clay and its application for phosphate removal from municipal effluents

Author: Masindi, Vhahangwele ; Gitari, WM ; Pindihama, KG Date: Jul 2015 In the present study, nanocomposite of cryptocrystalline magnesite-bentonite clay was used as a novel technology for removal of phosphates from municipal effluents. Vibratory ball miller was used for fabrication of the composite. Removal of ... Read more

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Browsing by Subject "Isotherms"

Browsing by Subject "Isotherms"

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