scholarly journals Remoção do herbicida glifosato utilizando carvão ativado impregnado com compostos metálicos de prata e cobre para a melhoria da qualidade da água

2016 ◽  
Vol 20 (1) ◽  
pp. 450
Author(s):  
Andressa Jenifer Rubio ◽  
Rosângela Bergamasco ◽  
Natália Ueda Yamaguchi
Keyword(s):  
Activated Carbon ◽  
Adsorption Mechanism ◽  
Adsorption Process ◽  
Human Consumption ◽  
Adsorption Efficiency ◽  
Metal Compounds ◽  
Quality Of Water ◽  
Glyphosate Herbicide ◽  
Effective Water

With the increasing use of several pesticides in agriculture, including the Glyphosate which is the herbicide most widely consumed worldwide, there is a need for the development of diversified and effective water treatment, since glyphosate consumption can cause serious health problems on animals, humans and plants. As an alternative treatment, the removal of glyphosate from the water can be obtained with the use of activated carbon, and further to leverage its results, may be used the impregnation of silver and copper on the activated carbon, since the activated carbon in the purest form it is marketed often not sufficiently effective for removing some pollutants. Therefore, this study aimed at the removal of glyphosate by an adsorption process using activated carbon impregnated with 0.5% silver and 0.5% copper with the aim of increasing the adsorption efficiency when compared to activated carbon. It was observed that the removal of glyphosate is improved when using the impregnated metal compounds, being 66.1% with the adsorbent GAC / AgCu and only 21.1% with GAC. It is still needed profound research related to characterization and adsorption experiments to better explain the adsorption mechanism that occurs in this process. However, it can be concluded that the granular activated carbon soaked with 0.5% silver and copper developed in the present work may be named as a possible technology for improving the quality of water intended for human consumption for removal of the glyphosate herbicide.

scholarly journals Adsorption of Humic Substances by Using Coconut Copra

2014 ◽  
Vol 695 ◽  
pp. 251-254
Author(s):  
Mohd Farid Atan ◽  
K.A. Mapi ◽  
S.N.F. Ghazali ◽  
Nazeri Abdul Rahman ◽  
Shanti Faridah Salleh
Keyword(s):  
Drinking Water ◽  
Activated Carbon ◽  
Humic Substances ◽  
Adsorption Process ◽  
Treatment Plant ◽  
High Concentration ◽  
Quality Of Water ◽  
A New Technique ◽  
Solid Liquid

Nowadays, consumers are concern about the quality of water that being supplied in order to ensure the water supplied is free from any harmful substances for example like Humic Substances (HS). High concentration of HS in drinking water can cause disease for human such as stomach cancer. Thus, it is important to develop a new technique to improve the quality of drinking water. Therefore, the objective of this research is to investigate the potential of using coconut copra treated with citric acid as activated carbon in adsorbing HS contained in wastewater collected from Asajaya Treatment Plant situated in district of Samarahan, Sarawak. In this research, the optimum condition of adsorption process need to determined. As such, there are two types of parameters which are considered as constant; temperature and pH of activated carbon and variable; solid liquid ratio and residence time. As a result, this research has shown that coconut copra possess the capacity to adsorp 97.5% of HS contained in wastewater.

scholarly journals Volumetric Quantification and Quality of Water Stored in a Mining Lake: A Case Study at Reocín Mine (Spain)

Minerals ◽  
2021 ◽  
Vol 11 (2) ◽  
pp. 212
Author(s):  
Noemí Barral ◽  
Raúl Husillos ◽  
Elena Castillo ◽  
Manuel Cánovas ◽  
Elizabeth J. Lam ◽  
...  
Keyword(s):  
Human Consumption ◽  
Business Opportunity ◽  
Manganese Zinc ◽  
Quality Of Water ◽  
New Business ◽  
Volumetric Quantification ◽  
Zinc Mine ◽  
Iron Manganese

This study deals with the potential use of water stored in a lake formed by Reocín’s old zinc mine, which has become the second most important reservoir in Cantabria, with a flow of 1300 L s−1. The methodology used is based on the hydrogeological and hydrochemical characterization of the area studied. A total of 16 piezometers were installed to monitor the amount and quality of water. Results obtained show a pH close to 8 and iron, manganese, zinc, and sulphate concentrations lower than 0.05 mg L−1, 0.05 mg L−1, 1.063 mg L−1, and 1305.5 mg L−1, respectively. The volume of the water stored in the lake amounts to 34 hm3. Measurements show that Fe, Mn, and Zn concentrations are below the limits acceptable for human consumption, according to the Spanish 0.2, 0.05, and 5.0 mg L−1 standards, respectively, while sulphate greatly exceeds the 250 mg L−1 limit accepted by the norm. Therefore, the water could be apt for human consumption after a treatment appropriate for decreasing the sulphate level by, for example, reverse osmosis, distillation, or ion exchange. Although industrial and energy uses are possible, the lake water could be utilized as a geothermal energy source. The management of the hydric resources generated when a mine is closed could improve the economic and environmental conditions of the zone, with all the benefits it brings about, thus allowing for compensating of the pumping cost that environmental protection entails, creating, at the same time, a new business opportunity for the company that owns the mine.

Eternal engine of progress

2021 ◽  
pp. 41-45
Author(s):  
В.А. Гвоздев ◽  
Л.В. Леонов ◽  
О.Н. Рублевская
Keyword(s):  
Drinking Water ◽  
Activated Carbon ◽  
Water Supply ◽  
Measurement System ◽  
Odor Control ◽  
Wastewater Disposal ◽  
Quality Of Water ◽  
Precipitation Measurement ◽  
General Director

Качество услуг водоснабжения и водоотведения за первые двадцать лет XXI века вывело на новый уровень развития ГУП «Водоканал Санкт-Петербурга» благодаря внедрению инновационных технологий в системах водоснабжения и водоотведения. Использование технологий, таких как двухступенчатое обеззараживание питьевой воды, дезодорирование полигонов, геотубирование, применение центрифуг «Флоттвег», порошкообразного однокомпонентного флокулянта, порошкообразного активированного угля, внедрение системы измерения осадков, осуществлялись при активном участии Федора Ивановича Лобанова – помощника генерального директора ГУП «Водоканал Санкт-Петербурга» по работе с промышленностью, которому в ноябре 2021 г. исполнилось 80 лет. The quality of water supply and wastewater disposal services over the first twenty years of the 21st century has brought SUE «Vodokanal of St. Petersburg» to a new level of development owing to the introduction of innovative technologies in water supply and wastewater disposal systems. The use of technologies, such as two-stage disinfection of drinking water, odor control of landfills, geotubing, the use of Flottweg centrifuges, powdered one-component flocculant, powdered activated carbon, the introduction of a precipitation measurement system, were carried out with the active participation of Fedor Ivanovich Lobanov, Assistant to the General Director of SUE «Vodokanal of St. Petersburg» on dealing with industries, who turned 80 in November 2021.

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