scholarly journals Utilization of extracellular polymeric substances (EPS) immobilized in epoxy polymer as double ion exchanger biosorbent for removal of chromium from aqueous solution

2020 ◽  
Vol 5 (1) ◽  
pp. 40-44
Author(s):  
Lilis Kistriyani ◽  
Zainus Salimin ◽  
Achmad Chafidz
Keyword(s):  
Ion Exchange ◽  
Extracellular Polymeric Substances ◽  
Group Analysis ◽  
Absorption Efficiency ◽  
Complex Compounds ◽  
Epoxy Polymers ◽  
Ion Absorption ◽  
Standard Quality ◽  
Amino Acid Polymers ◽  
Functional Components

Cation and industrial pollutant anions are removed from wastewater using organic cation and anion exchange resin. "Extracellular Polymeric Substance" (EPS) from bacterial extraction can accumulate cation and anion elements through biosorption by adsorption mechanism, ion exchange, formation of complex compounds and hydrogen bonds. EPS can be used as an biosorbent and ion exchange bioresin replacing organic resins, because EPS contains organic functional groups that are negatively charged (RCOOH, ROPO3H, ROPO3Na, ROSO3H, ROSO3Na, etc.) cation absorbers and positively charged (ROH, RCNH2HCOOH, etc.) anion absorber. EPS consists of 40-95% polysaccharide compounds, protein 1-60%, nucleic acids 1-10%, lipids 1-10% and the remaining amino acid polymers and other compounds. The tannery industry produces trivalent (Cr+3) chromium pollutants at levels of 15.2 ppm and hexavalent (CrO4-2 or Cr2O7-2) levels of 0.77 ppm which exceeds the standard quality for a total Cr of 0.6 ppm. Cr pollutants are very dangerous for human health. Research had been done on the use of immobilized EPS bioresin in epoxy polymers for chromium binding. EPS was extracted from bacterial activated sludge by centrifugation at 9000 rpm for 20 minutes at 4°C, the filtrate was EPS. The analysis showed EPS content were 16% fat, 12% carbohydrate, and 16% protein. The functional group analysis results with infrared ray spectroscopy (FTIR) showed EPS containing chemical bonds such as -CH, -OH, -NH, and -C=O which proved that EPS extraction contained RCOOH, ROH, and RCNH2HCOOH functional components which were exchanging components cations and anions. Epoxy polymers were prepared by mixing bisphenol A monomers and 1: 1 ratio epichlorohydrin. Immobilized EPS double ion exchange biorecin in epoxy polymers was prepared by mixing 200 mg EPS and 1800 mg epoxy. The binding of chromium ions in the resin was carried out by recirculating the chromium solution through a burette column filled with 2 rams of bioresin at pH 5, 6 and 7. The optimum results gave chromium ion absorption efficiency of 89.20% at pH 5. Column operations could be optimized by varied the amount of bioresin used.

scholarly journals CHARACTERIZATION OF SULFONATED POLYSULFONE/BENTONITE HYBRID MEMBRANES

2014 ◽  
Vol 13 (1) ◽  
pp. 7
Author(s):  
Bambang Piluharto ◽  
Imam Syafi’i ◽  
R. Indahsari ◽  
Tanti Haryati
Keyword(s):  
Ion Exchange ◽  
Water Uptake ◽  
Mechanical Stability ◽  
Group Analysis ◽  
Exchange Capacity ◽  
Polysulfone Membrane ◽  
Ion Exchange Capacity ◽  
Fuel Cell Application ◽  
Sulfonated Polysulfone ◽  
Functional Group Analysis

Sulfonated polysulfone membrane is one of the alternative membranes as replacing Nafion membrane for the fuel cell application. This membrane was prepared by introducing sulfonic group in the polysulfone structure backbone, so that provides the ionic membrane. However, more ionic groups in the SPSF membrane lead to loss mechanical stability. This study aims to prepare the hybrid membrane from SPSF and bentonite. In here, various of bentonite concentrations were used as variable to study water uptake and ion-exchange capacity properties. As the results, increasing bentonite concentrations lead to increase water uptake and ion-exchange capacity. By the functional group analysis, proved that adding bentonite in SPSF did not change structure of SPSF, means that interaction between SPSF and bentonite were physical interactions.

THE BIO-ELECTRIC POTENTIALS OF PLANTS AND THEIR FUNCTIONAL SIGNIFICANCE: III. THE PRODUCTION OF CONTINUOUS POTENTIALS ACROSS MEMBRANES IN PLANT TISSUE BY THE CIRCULATION OF THE HYDROGEN ION

1959 ◽  
Vol 37 (5) ◽  
pp. 1003-1026 ◽  
Author(s):  
D. S. Fensom
Keyword(s):  
Ion Exchange ◽  
Plant Cells ◽  
Hydrogen Ion ◽  
Protoplasmic Streaming ◽  
Ion Diffusion ◽  
Hydronium Ion ◽  
Ion Absorption ◽  
Ion Production ◽  
Electric Potentials ◽  
The Right

Of the three types of membranes which occur generally in plant cells, lipoid, protein, and cellulose, it would seem that a protein-coated grid of cellulose can be envisaged as surrounding the cells. Such a membrane would appear to have the right pore size and properties to allow almost unfettered hydrogen ion diffusion but yet permit intercell biopotentials to be built up. It is pointed out that the most important ion involved in diffusion and in subsequent ion exchange would seem to be the hydrogen (as hydronium) ion, and that tissue can conveniently be divided into general areas of hydrogen ion production or hydrogen ion absorption. The resulting circulation of this ion is explored and discussed in relation to photosynthesis, respiration, protoplasmic streaming, and transport. These ideas are shown to give reasonable explanations for the results obtained in experiments and to resolve certain difficulties related to biopotential studies. They are considered to be useful since they predict some important results which can be experimentally tested, some of which are here given.

scholarly journals Investigate the adsorption of cesium ion (Cs+) on Zn2[Fe(CN)6] AND Zn3[Fe(CN)6]2 nanoparticles

2020 ◽  
Vol 3 (4) ◽  
pp. 307-316
Author(s):  
Nguyen Dinh Trung ◽  
Le Thi Ha Lan ◽  
Truong Dong Phuong
Keyword(s):  
Ion Exchange ◽  
Adsorption Capacity ◽  
Exchange Capacity ◽  
Ion Concentration ◽  
Experimental Conditions ◽  
Ion Exchange Capacity ◽  
Freundlich Isotherms ◽  
Ion Absorption ◽  
Adsorption Data ◽  
Ph Range

Adsorption of Cs+ ion from aqueous solution by Zn2[Fe(CN)6] and Zn3[Fe(CN)6]2 nanoparticle, and the effect of experimental conditions on the adsorption were investigated. Preliminary results showed that two materials were very efficient as an absorbent. Zn2[Fe(CN)6] and Zn3[Fe(CN)6]2 nanoparticle adsorbents for removal Cs+ion from solution have been successfully synthesized. Comparison between two materials, the Cs + ion adsorption capacity of Zn2[Fe(CN)6] was higher than Zn3[Fe(CN)6]2 and the reaction time was shorter. The adsorption equilibrium time of Zn3[Fe(CN)6]2 was about 20 hours, and the suitable pH range 3-7 while the Zn2[Fe(CN)6] was 15 minutes. The Cs+ ion absorption by Zn2[Fe(CN)6] nanoparticle follow the ion exchange mechanism, the best exchange capacities of the material were in the pH 3-5 range, ion exchange capacity depended on the pH, the maximum ion exchange capacity of the material at pH = 4 was 1.01 meq (Cs+) / g. After 15 min, about 98% of initial Cs+ ion concentration was removed from the solution; the adsorption data did not accord with Langmuir and Freundlich isotherms. The high adsorption capacity and good performance on other aspects, make the Zn2[Fe(CN)6] nanoparticle a promising adsorbent for the removal of Cs+ ion from water.

Utilization of Modified Zeolite Materials as Chromium Cation Exchanger for Treatment of Liquid Waste from Electroplating Industries

2020 ◽  
Vol 991 ◽  
pp. 172-177
Author(s):  
Zainus Salimin ◽  
Muhammad Susianto ◽  
Budiman Batara ◽  
Achmad Chafidz
Keyword(s):  
Ion Exchange ◽  
Chloride Solution ◽  
Cation Exchanger ◽  
Chemical Activation ◽  
Liquid Waste ◽  
Absorption Efficiency ◽  
Optimum Ratio ◽  
Modified Zeolite ◽  
Activity Test ◽  
Chromium Absorption

Chromium absorption using modified zeolites in the form of mono-cation (H-Zeolite) was carried out. Modifications are intended to increase the ability of ion exchange. Modifications made were chemical activation by adding ammonium chloride solution and physically by calcination. Zeolite used came from Kasongan, while as an activity test liquid waste from the electro plating industry PT. Mega Andalan Electro Plating. The parameter used for this study is the comparison of zeolite mass with waste samples. Comparisons used are 1: 5, 1: 7, 1:10, 1:20 and 1:50. From the results of the study it can be seen that there is an increase in the ability of ion exchange in the modified zeolite and produces an optimum ratio of 1: 7 with an absorption efficiency of 13.44%..

scholarly journals Efficacy of Mineral Cationic Carrier Against Sulphur Mustard in Skin Decontamination

2008 ◽  
Vol 59 (4) ◽  
pp. 289-293 ◽  
Author(s):  
Ante Vučemilović ◽  
Mirko Hadžija ◽  
Ivan Jukić
Keyword(s):  
Ion Exchange ◽  
Absorption Efficiency ◽  
Sulphur Mustard ◽  
Cba Mice ◽  
Skin Contamination ◽  
Bioactive Potential ◽  
Skin Decontamination

Efficacy of Mineral Cationic Carrier Against Sulphur Mustard in Skin DecontaminationThe aim of this study was to evaluate decontamination (absorption) efficacy of a preparation called Mineral Cationic Carrier (MCC®) against skin contamination with sulphur mustardin vivo. MCC® is a synthetic preparation with known ion exchange, absorption efficiency, and bioactive potential. CBA mice were applied increasing doses of sulphur mustard on their skin and MCC® was administered immediately after skin contamination. The results have confirmed the decontamination efficacy of MCC® preparation, corresponding to 8.4 times the LD50of percutaneous sulphur mustard, and call for further investigation.

Embedding Procedure for Water Swollen Samples

1970 ◽  
Vol 28 ◽  
pp. 504-505
Author(s):  
Ann M. Thomas ◽  
Virginia Shemeley
Keyword(s):  
Electron Microscopy ◽  
Transmission Electron Microscopy ◽  
Ion Exchange ◽  
Structural Changes ◽  
Cross Linking ◽  
Ion Exchange Resins ◽  
Transmission Electron ◽  
First Pass ◽  
Exchange Resins

Those samples which swell rapidly when exposed to water are, at best, difficult to section for transmission electron microscopy. Some materials literally burst out of the embedding block with the first pass by the knife, and even the most rapid cutting cycle produces sections of limited value. Many ion exchange resins swell in water; some undergo irreversible structural changes when dried. We developed our embedding procedure to handle this type of sample, but it should be applicable to many materials that present similar sectioning difficulties.The purpose of our embedding procedure is to build up a cross-linking network throughout the sample, while it is in a water swollen state. Our procedure was suggested to us by the work of Rosenberg, where he mentioned the formation of a tridimensional structure by the polymerization of the GMA biproduct, triglycol dimethacrylate.

Sign in / Sign up

Export Citation Format

Share Document