Biological treatment for the degradation of cyanide: A review

Heterologous Expression of Cyanobacterial Cyanase Gene (CYN) in Microalga Chlamydomonas reinhardtii for Bioremediation of Cyanide Pollution

“…The enhancement of an ecofriendly method to remediate the pollutants from water and soil has become the main target of several recent studies, to avoid the chemical hazards released during the chemical treatment of pollutants. As several plants, bacteria, and fungi may utilize cyanide pollutants as a source of nitrogen for their metabolic processes, the bioremediation of cyanide investigations is becoming more significant than chemical treatment methods [ 32 ]. The high and significant efficiency of the algal bioremediation of cyanide has been proved previously, due to their volume ratios, efficient uptake, and storage systems [ 12 ].…”

Thiosulfate-Cyanide Sulfurtransferase a Mitochondrial Essential Enzyme: From Cell Metabolism to the Biotechnological Applications

“…Cyanide is a nitrile which is extensively employed in many industry fields such as pharmaceuticals, food processing, coal cooking, jewelry, mining, electroplating, plastics, dyes and paints [ 143 ]. It is present in various forms in industrial wastes (including free cyanide, simple inorganic salts, metal cyanide complexes, cyanate and organic cyanides) [ 149 ], in agricultural wastes (nitrile herbicides as dichlobenil, ioxynil or bromoxynil) [ 150 ] and in wastes from precious metal mining (roughly 1.0 kg of sodium cyanide or potassium cyanide is needed to recover 1.5 g of gold) [ 151 ]. Because of its potential environmental toxicity, different cyanide detoxification strategies, both physical-chemical [ 152 , 153 ] and natural-biological ones [ 149 , 154 , 155 , 156 ], have been developed and modified during the last decades for curbing down cyanide pollution.…”

Effect of Doping TiO2 NPs with Lanthanides (La, Ce and Eu) on the Adsorption and Photodegradation of Cyanide—A Comparative Study

“…Cyanides are highly toxic chemical compounds that can cause severe harm to health and the environment [ 1 ]. The most common cyanide compounds in the environment are present both in their free form, which comprises the cyanide ion itself (CN − ) and hydrogen cyanide (HCN), and as water-soluble inorganic salts, including sodium cyanide (NaCN) and potassium cyanide (KCN) [ 2 ]. Some cyanide compounds are naturally produced by microorganisms, although they can also be found in plants and some foods, as well as in low concentrations in soil and water.…”

“…Photocatalysis applied to aqueous or gaseous systems involves formation of reactive oxygen species (ROS), such as superoxide ( • O 2 − ), hydroxyl radical ( • OH), and singlet oxygen ( 1 O 2 ), which are produced by electron capture by oxygen or oxidation of water molecules [ 2 ]. ROS are very effective oxidizing agents, capable of degrading recalcitrant compounds, and can also be produced on the surface of semiconductor materials, such as titanium dioxide (TiO 2 ) [ 14 ].…”