Density functional theory (DFT) calculations (interaction energy was -74.42 kcal/mol) indicated that the adsorption peak resulted from cation-π interactions between the cyanide and CB. This study could lead to a novel environmental-friendly approach for the removal of cyanide from gold smelting pulp.

Cyanide is a known toxic chemical compound that has an adverse effect on living organisms. Nonetheless, it is one of the active reagents in industries such as mining, pharmaceutical, cosmetics, and food processing companies worldwide. The beneficiation of gold and other precious metals from ore generates great amount of cyanide-bearing …

The cyanide process is the dominant method for gold recovery from ores, but due to different technical and environmental issues the established cyanide process reaches its limit.

In the context of environmental monitoring studies bioindicators reflect organisms (or parts of organisms or communities of organisms) that contain information on quality of the environment (or a ...

The SDS-AgNP-based approach obtained the cyanide detection limit of 1.8 μM and was exploited for its application in cyanide detection in dam water samples. ... thus being referred to as AgNCs that acted as fluorescent probes. This technique was used to detect cyanide ions in environmental water samples with its device integrated with a …

Structure. The Cyanide Code is comprised of two fundamental components for each of the three industries within its scope. Principles state broad commitments that signatory gold and silver mines, cyanide producers, and cyanide transporters make to manage cyanide in a responsible manner. Standards of Practice follow within each Principle, identifying …

Precipitation, sorption, degradation, and dissolution are the basic processes involved in soil cyanide toxicity. Therefore, the soil's buffer capacity, water …

Recently, with the increasing awareness of environmental hazards and potential risks posed by the severe toxicity of cyanide, attempts to seek alternative lixiviants have arisen.

Cyanide is a highly reactive nucleophile abundantly present in the environment and is regarded as a potent suicidal, homicidal, and genocidal agent. ... and micro- chemiluminiscence (Lv et al., 2005) have been reported for different environmental or biological samples. However, their utility to detect cyanide in blood samples is yet to …

The main purpose of this review is to propose an integrated biological degradation process for cyanidation wastewater with the purpose of recycling process …

The principle of the approach is to eliminate some components of the gas mixture based on differences in solubility or reactivity between the various components …

A landscape approach can be defined as a framework to integrate policy and practice for multiple competing land uses through the implementation of adaptive and integrated management systems (Reed et al., 2015). The landscape approach seeks to address global challenges of poverty alleviation, food security, climate change and …

The concentration of cyanide at the sampling site far away from human activities was higher at 6.71 mg/kg, and the average concentration is 2.5 mg/kg. ... A large number of cyanide residues are piled on the ground and exposed to the environment. Cyanide is a highly toxic substance, ... According to the principle of systematic …

Cyanide may also be released into the atmosphere from combustion of organic or synthetic compounds containing carbon and nitrogen (such as the burning of fossil fuels), and incomplete combustion during forest fires is believed to be a major environmental source of cyanide (Dzombak et al., 2006). Cyanide is known to be …

Cyanide hydratases (CynHs) (EC 4.2.1.66), which convert fCN to the much less toxic formamide, have been considered for a mild approach to wastewater decyanation. However, few data are available to ...

There are nine Principles, focused on cyanide production, trans-portation, handling and storage, opera- ... munities and the environment from cyanide through development and

The detection of key ions in environmental samples has garnered significant attention in recent years in the pursuit of a cleaner environment for living organisms. Bifunctional and multifunctional sensors, as opposed to single-species sensors, have emerged as a rapidly developing field. Many reports in the literature have …

The extreme toxicity of cyanide (CN-) ions is a great environmental concern as its continued industrial use generates interest in facile and sensitive methods for CN- ions detection. Since CN- ions act as a ligand in coordination chemistry which rapidly coordinates with suitable metals and forms complexes, this ability was mainly explored in ...

This paper describes a direct optical approach based on Raman scattering for selective and sensitive detection of cyanide ions in aqueous environment without requiring time-consuming sample ...

The present report elucidates the efficiency of microbes to detoxify free cyanide and other cyanide complexes in contaminants. The discussion is focused on …

The ban was framed by its supporters as being demanded by the 'precautionary principle, as set out in the Rio Declaration on Environment and Development and in the Convention on Biological Diversity adopted in Rio de Janeiro' (Ader et al. 2010, 2). The CBN referred to cyanide as being a very toxic chemical whose use …

This paper describes a direct optical approach based on Raman scattering for selective and sensitive detection of cyanide ions in aqueous environment without requiring time-consuming sample pretreatment and the formation of hydrogen cyanide. Due to the strong affinity between copper (I) and cyanide …

DOI: 10.1016/j.ecoenv.2010.02.018 Corpus ID: 30841541; A novel cyanide ion sensing approach based on Raman scattering for the detection of environmental cyanides. @article{Yan2010ANC, title={A novel cyanide ion sensing approach based on Raman scattering for the detection of environmental cyanides.}, author={Fei Yan and …

The first part of the current article focuses on the various cytotoxic mechanisms of cyanide, in the environmental toxicology context, and also details the small body of evidence implicating the action of bacterial cyanide in a pathophysiological context.

Cyanide is used in several industries but is widely used for gold extraction due to its ability to complex and stabilize gold ions. The waste generated from this process is of great volume because ...

While some of these principles and/or approaches are reflected in the sets of principles and/or approaches mentioned in Section 5, many additional principles and/or approaches were proposed following deliberations at the third (IGC-3) and fourth (IGC-4) session of the IGC. There appears to be general support among negotiators for …

Assessment of the ability of Phanerochaete chrysosporium to degrade cyanide under different conditions including changes in cyanide concentration, culture mass, time, closed system and open system finds the degradation could be based on a number of mechanisms including hydrolysis to HCN, oxidation to cyanyl radical and …

The major points are the following: 1) principle of operation, of passive samplers, 2) characteristics of POCIS and sorbents used as receiving phases, 3) sampler calibration methods and environmental factors affecting their operation, 4) a detailed description of the application possibilities of conventional and innovative sorbents used …

The paper intends to approach some of the risks related to cyanide technology in gold mining, with particular focus on the closure phase. The Romanian mining industry is subjected to various environmental problems nowadays. Despite …

This presentation conducts a comparative analysis of the principles governing English, German and European insolvency and environmental law to offer a principled approach for the use of disclaimer powers and the ranking of (environmental) claims in insolvency. It analyses whether different approaches, such as recognizing a preferential status to