Showing papers in "Journal of industrial pollution control in 2019"
Journal Article•
TL;DR: In this article, the authors present field measurement data and modeling of air pollutant during one season at an urban area in Sousse, east Tunisia, and analyzed the average pollutant emission and used their data to evaluate a dispersion model.
Abstract: In this work, we present field measurement data and modeling of air pollutant during one season at an urban area in Sousse, east Tunisia. We analyzed the average pollutant emission and we used our data to evaluate a dispersion model. The impact of various meteorological factors on pollutants concentrations has been studied. The model predicts that the concentrations of CO and CO2 in an urban area can reach 50 mg.m-3 and 185 mg.m-3 respectively. The height of the chimney, the wind velocity, the fuel nature, the air excess and the combustion temperature have an influence on the concentrations of pollutants and their dispersion.
3 citations
Journal Article•
TL;DR: In this paper, an attempt has been made to analyze the biosorption of heavy metals by Strychnos potatorum and Moringa oleifera seeds from the tannery effluent.
Abstract: The seeds of Strychnos potatorum and Moringa oleifera are a natural coagulant which shows promising bioflocculant activity. These seeds are used to purify the drinking water in rural South India. In this research, an attempt has been made to analyze the biosorption of heavy metals by Strychnos potatorum and Moringa oleifera seeds from the tannery effluent. Heavy metals were estimated by atomic absorption spectrophotometer. The toxicity level of the treated effluent was analysed by green gram germination bioassay. Shoot length and root length of the germinated seeds were measured and seedling vigour index were calculated. The heavy metal removal efficiency of the seeds of Moringa and Stychnous was higher there by making both the seeds a promising candidate for industrial effluent treatment. These agro based compound could replace the chemical coagulant and is an environmentally friendly approach to effluent treatment.
1 citations
Journal Article•
TL;DR: A. tubingensis Merv4 showed the highest resistant toward mercury (Hg2+) with the highest tolerance against zinc (Zn2+), simultaneously it was tolerant to different other toxic metals like pb2+, Cr6+, Cd2+ and Ni2+ with varied degree of resistant as mentioned in this paper.
Abstract: Zinc and mercury are causing a problem worldwide owing to highly toxicity and this problem will intensify if obligatory actions not taken. In present study searching about bioactive fungal strain can. We screened ten endophytic fungal species derived from different plants grow in polluted sites for tolerating and removing both zinc and mercury efficiently from aqueous solutions. Among these isolates Aspergillus. tubingensis Merv4 showed the highest resistant toward mercury (Hg2+) with the highest tolerance against zinc (Zn2+). Moreover, simultaneously it was tolerant to different other toxic metals like pb2+, Cr6+, Cd2+ and Ni2+ with varied degree of resistant. Dead biomass of A. tubingensis Merv4 strain showed capable of totally removing (100%) of both zinc and mercury, respectively from aqueous solution under optimized conditions. In real industrial disposal water the maximum removal values of zinc and mercury were (96% and 91%, respectively) by dead biomass of A. tubingensis Merv4 under optimized conditions. In near future these promising fungi can be used in bioremediation of mercury, zinc and other metal contaminates from industrial wastewaters onto microbial dead biomass.
1 citations
Journal Article•
TL;DR: In this paper, the authors used the ANOVA test to determine the differences in the electrocoagulation contact time of 30 minutes, 60 minutes and 90 minutes against the reduction of sulfides and colors in wastewater.
Abstract: PT Sipatex Putri Lestari is an industry engaged in the textile sector. In the production process, this industry produces alkaline wastewater and there are several parameters that exceed NAB including sulfides and colors. From the results of laboratory tests it was found that sulfide levels were 1.3 mg/l, the sulfide content of this wastewater exceeded the predetermined quality standard, which was 0.3 mg/l. The high levels of sulfide in waste water cause an unpleasant odor and can disrupt the concentration of employees in work and the color of the waste water after processing is still a little thick. The purpose of this study was to determine the differences in the electrocoagulation contact time of 30 minutes, 60 minutes and 90 minutes against the reduction of sulfides and colors in wastewater. The type of research used in this study was an experiment with the design of pre and post control. From the results of the ANOVA test it was found that the electrocoagulation process can reduce sulfide and color in wastewater (p value <0.05). Electrocoagulation contact time 30 minutes, 60 minutes, 90 minutes respectively can reduce sulfide 35.29%, 60.33%, 76.28%. And the color decrease was 42.28%, 52.28%, 80.62%. The most effective reduction in sulfide and color is at 90 minutes of contact time, with 12 volt electricity voltage, 3 A electric current and 3 cm between electrodes. This electrocoagulation method can be a simple alternative to processing liquid waste with several other considerations. The electricity tariff used in the electrocoagulation process with a oltage of 12 volts, a current of 3 amperes and a time of 90 minutes is: 0.054 kWh × Rp.1,420.12/kWh = Rp.76,14648.
1 citations
Journal Article•
TL;DR: In this article, the potential of NH4-Y zeolite as an adsorbent for barium ions in aqueous solutions, as a methodology to prevent barium sulfate incrustations, was examined.
Abstract: Adsorptive techniques have shown considerable promise for the removal of metals from effluents and enable the use of a variety of alternative adsorbent materials that are both highly efficient and inexpensive. This work aims to examine the potential of NH4-Y zeolite as an adsorbent for barium ions in aqueous solutions, as a methodology to prevent barium sulfate incrustations. During the adsorption assays, various parameters were studied, such as the initial concentration of barium, adsorbent dosage, contact time and the point of zero charge of the adsorbent material, which enabled a full investigation of the optimum parameters for maximum removal of those ions. A complete and systematic study regarding the adsorption kinetics (pseudo-first order, pseudo- second order, and Avrami) and adsorption isotherm (Langmuir, Freundlich, Langmuir- Freundlich, Redlich-Peterson, and Sips) was performed using various regression methods. The best fits to the experimental data were provided by the Avrami exponential kinetic model and by the Sips adsorption isotherm model. Overall, NH4-Y zeolite has shown an adsorption capacity of 101.5 mg/g-1, which is significantly larger than other common adsorbents, fast kinetics, and great removal efficiency, achieving up to 100% under optimized conditions