Ag, Hg and Cr Precipitation for Recycling Derived of Hazardous Liquid Waste
Silvia C. Gutiérrez-Gutiérrez,Genoveva Rosano-Ortega,Carlos Arturo Vega-Lebrún,Juan Manuel Lopez,Pedro Avila-Pérez,Sonia Martínez Gallegos,Daniel Cruz González +6 more
Reads0
Chats0
TLDR
In this article, a series of chemical precipitations were evaluated for efficiency in the reduction of heavy metals in liquid waste, and after treatment the wastewater presented concentrations of 0.064 mg·L-1 Ag, 0.010 mg·l-1 Hg and 0.048 mg· l-1 Cr, with a standard pH (7.5-8.5); with removal efficiencies of 94.31% for Ag, 99.99% for Hg, and 98.17% for Cr.Abstract:
Production of different compounds can generate large amounts of hazardous wastes which are dangerous to the environment and human health. The disposal or treatment of hazardous liquid waste rich in heavy metals like silver (Ag), mercury (Hg) and chromium (Cr) is difficult due to the strong acidity and toxicity which usually present in these contaminants. For this study, several research works were reviewed in order to obtain an efficient and viable treatment in time and removal efficiency. A series of chemical precipitations were evaluated for efficiency in the reduction of heavy metals in liquid waste. The precipitation of all three metals lasted 30 minutes and after treatment the wastewater presented concentrations of 0.064 mg·L-1 Ag, 0.010 mg·L-1 Hg and 0.048 mg·L-1 Cr, with a standard pH (7.5-8.5); with removal efficiencies of 94.31% for Ag, 99.99% for Hg and 98.17% for Cr.read more
Citations
More filters
Journal ArticleDOI
Remediation and recycling of chromium from tannery wastewater using combined chemical–biological treatment system
TL;DR: In this paper, a laboratory scale system using chemical precipitation of chromium (III) combined with biological removal of Cr(VI) from tannery wastewater, and to investigate the possibility of recycling the recovered Cr(III) in the tanning industry.
Journal ArticleDOI
Technologies applicable to the removal of heavy metals from landfill leachate.
TL;DR: This article presents a review of the main physical, chemical, electrochemical, and biological technologies used for treating heavy metals in the wastewater of industrial processes and in synthetic aqueous solutions which could be applied to leachate from landfills.
Journal ArticleDOI
Sample pretreatment for the capillary electrophoretic determination of organic acids in chromium(III) plating baths.
TL;DR: Very good robustness of the method and satisfactory repeatability of migration time and peak area were obtained, and this simple inexpensive method is suitable for routine determination of citric and oxalic acid in chromium(III)-based plating baths.
References
More filters
Book
Fundamentals of analytical chemistry
TL;DR: In this paper, the fundamental principles of analytical chemistry are discussed, together with a review of the applications of these concepts in analytical chemistry.http://www.documentaries.org.au.
Journal ArticleDOI
Exposure-Related Health Effects of Silver and Silver Compounds: A Review
TL;DR: A critical review of studies examining exposures to the various forms of silver was conducted to determine if some silver species are more toxic than others.
Journal ArticleDOI
Hydrogen sulfide: advances in understanding human toxicity
TL;DR: Evidence is addressed that settles past controversies, guides practical issues in evaluating human toxicity, addresses unresolved issues involving chronic exposure, and points the way to a deeper understanding of the agent and its effects.
Journal ArticleDOI
Mercury: major issues in environmental health.
TL;DR: In the past, methylmercury compounds were manufactured as fungicides or appeared as unwanted byproducts of the chemical industry, but today the methylation of inorganic mercury in aquatic sediments and soils is the predominant if not the sole source of methylMERcury.
Journal ArticleDOI
On the adsorption/oxidation of hydrogen sulfide on activated carbons at ambient temperatures.
TL;DR: It was demonstrated that a more acidic environment promotes the formation of sulfur oxides and sulfuric acid despite yielding small H(2)S removal capacities, and study of carbon regeneration using water washing and heat treatment showed that the adsorbents can be regenerated to about 40% of their initial capacity.