Pengolahan Limbah Cair Industri Tahu Menggunakan Tanaman Typha Latifolia dengan Metode Constructed Wetland

Tofu industry is a domestic industry largely do not have sewage treatment units, wherewastewater directly discharge into sewers or water bodies without treatment. The aims ofstudy observation the ability of constructed wetland using T. latifolia to removal, COD andTSS. The research variations were plant and detention time. Constructed wetland reactorusing plastics with dimension 50, 36, 31cm, in length x width x height and soil mediathickness of 10 cm, 5 cm sand and 5 cm gravel. T. latifolia plant density 0, 0,5, 0,75 and 1g/cm2, and variations detention time 1,2, and 3 day. Optimal results were obtained in plantsTypha latifolia 1 g/cm2 and detention time day to 3 there are COD 200 mg/L and efficiency of92,70%; TSS 153 mg/L with efficiency 87,90%;. Anova analysis results α = 5% show thevalue COD 98,8%; and TSS 92,8%. Wich explains that the plant density factor and detentiontime affect the the concentration reduction COD and TSS

Adsorpsi Ion Logam Cu dengan Menggunakan Fly Ash Sawit sebagai Adsorben

Copper is one of the heavy metals that can cause environmental pollution. One method of separation that can be done to reduce the environmental pollution is adsorption method. With this method required an effective adsorbent to adsorb metalions. This research aims to Fly ash absorbent of copper. determine (1) under optimum conditions (time and pH) and Cu2+ ions adsorption using fly ash, (2) ion adsorption capacity of C2+ using fly ash, were analyzed using Atomic Absorption Spectrophotometer (AAS). Data were analyzed descriptively reported in tables and graphs. The results showed that the optimum contact time required for adsorption Cu2+ ions using fly ash is 60 minute and the optimum pH is 6. Cu2+ ion adsorption by the fly ash Freundlich adsorption isotherm according to the value of R2 = 0,973 mg/

Analisis Tingkat Kebisingan di Kawasan Kampus Fakultas Kedokteran Universitas Riau

Noise is one of environmental problem that should be given an attention, because noise with high intensity can cause negative impacts to human\u27s health, comfort and psychology. Noise in school or campus area can interfere with process of teachingand learning. The purpose of this research is to analyze noise level at Faculty of Medicine UR and provide solutions to control the noise in that area. The procedure of noise measurement was done according to the regulation of Minister of Environment No. 48 1996 attachment II about Measurement Method. The measurement and evaluation of environment noise level used Sound Level Meter in13 spots for 2 days (weekend and weekday). The result shows, maximum noise occurred on Sunday at spot number 1 with 89.1 dB noise level. Primary source of the noise came from traffic activity. This is shown by the result of noise measurement of89.1 from 6664 vehicles that passed by spot number 1 on Sunday and 83.3 dB from 6264 vehicles passed by spot number 1 on Monday. This research recommends noisecontrol solutions by substitution control, technical control and administrative control

Transport of Water and Gases through EVA/PVC blend films – Permeation and DSC investigations.

The transport of water vapor and gases (oxygen and carbon dioxide) through poly(ethylene-co-vinyl acetate) (EVA) films of different VA content, poly(vinylchloride) (PVC) and EVA/PVC blend films, was analysed from permeation measurements. A plasticization effect of water on the material was observed for EVA films with more than 19% wt. of VA content and for the EVA/PVC blends, while for gas permeation practically all the experimental curves are characterized by a constant diffusion coefficient, whatever the VA content of the copolymer used. The increase in water absorption with the VA content leads to a steady increase in the water permeability of the EVA copolymers. By mixing the glassy PVC polymer with the EVA copolymer (in a rubbery state) reduced water and gas permeability is observed, resulting mainly from the decrease of the diffusivity due to the low segment mobility of the dense PVC material able to create hydrogen bonds between the hydrogen atoms and the Cl-substituted carbon of PVC with VA carbonyls. Compared to EVA copolymers, the EVA/PVC blends with equivalent VA contents are better in terms of selectivity

Conductive films based on composite polymers containing ionic liquids absorbed on crosslinked polymeric ionic-like liquids (SILLPs)

Polymerization of styrenic monomers containing imidazolium subunits in the presence of crosslinking monomers and using ionic liquids (ILs) as porogenic agents provides composite materials with excellent mechanical properties and displaying conductivities that are in the same order of magnitude than those shown by bulk ILs. This approach allows the use of high crosslinking degrees and low IL-loadings without compromising the required properties of the resulting composites. Besides, no appreciable leaching of the bulk IL component is detected.Financial support by Ministerio de Ciencia e Innovacion (CTQ2011-28903-C02-01 and SP-ENE-20120718), Generalitat Valenciana (PROMETEO/2012/020) and Universitat Jaume I (P11B2013-38) is acknowledged.Altava Benito, B.; Compañ Moreno, V.; Andrio Balado, A.; Del Castillo Davila, LF.; Mollá Romano, S.; Burguete, MI.; García-Verdugo Cepeda, E.... (2015). Conductive films based on composite polymers containing ionic liquids absorbed on crosslinked polymeric ionic-like liquids (SILLPs). Polymer. 72:69-81. https://doi.org/10.1016/j.polymer.2015.07.009S69817

Synthesis and polymerization of acrylic monomers with hydrophilic long side groups. Oxygen transport through water swollen membranes prepared from these polymers

[EN] The synthesis and characterization of tetraethyleneglycol acrylate (TTEGA) and tetraethyleneglycol diacrylate are described. Radical polymerization reactions of TTEGA were carried out at different temperatures and the curves of conversion against time, obtained by using dilatometric techniques, allowed the determination of k(p)/k(t)(1/2), where k(p) and k(t) are, respectively, the propagation and termination rate constants. The values found for this ratio were comparatively much higher than those reported in the literature for other acrylic monomers. The polymer, poly(tetraethyleneglycol acrylate), is soluble in water, exhibits low glass transition temperature (-45 degrees C) and the percentage of syndiotactic dyads in the chains lies in the vicinity of 65 +/- 5%, a value normally found in similar polymers. Both poly(tetraethyleneglycol acrylate-co-tetraethyleneglycol diacrylate) and poly(triethyleneglycol acrylate-co-triethyleneglycol diacrylate) membranes were prepared by radical polymerization of the corresponding monomers and a small quantity of diacrylic esters. Electrochemical techniques were used to evaluate oxygen transport through these membranes swollen in water. The apparent values of both the permeability and diffusion coefficients are unusually large as a consequence of a high swelling degree of these membranes. Although the solubility coefficient of oxygen in the swollen hydrogels is larger than in water, restrictions in the diffusion path caused by the polymer matrix decrease the diffusion coefficient of the gas to ca one-third of its value in water.We gratefully acknowledge the skilful technical assistance of Mr Delgado and the financial support of the CICYT through the grant PB-92-0773Guzman, J.; Iglesias, M.; Riande, E.; Compañ, V.; Andrio, A. (1997). Synthesis and polymerization of acrylic monomers with hydrophilic long side groups. Oxygen transport through water swollen membranes prepared from these polymers. Polymer. 38(20):5227-5232. https://doi.org/10.1016/S0032-3861(97)00039-6S52275232382