Содержание журнала №1 за 2014 год
Информация о статье:
| Раздел/Section | Экология | Environmental problems |
| Страницы/Pages | 51-55 | |
| Заглавие/Title | Опыт промышленной эксплуатации нерастворимых анодов в процессе очистки воды в ванне улавливания от цианид-ионов электрохимическим методом | Industrial Experience of the Operation of Insoluble Anodes in the Course of Water Purification from Cyanide Ions by the Electrochemical Method |
| Авторы/Authors | Тураев Д.Ю. | Turaev D.Yu. |
| Ключевые слова Keywords | цианид-анионы, ванна улавливания, цианидный электролит цинкования, нерастворимый анод из диоксида свинца, очистка электролизом, cyanide-anions, a catching bath, cyanide electrolyte of zinc plating, the insoluble anode from lead dioxide, purification by electrolysis | |
| Аннотация Description | Приведены результаты промышленной эксплуатации нерастворимого анода из диоксида свинца на титановой основе для обезвреживания производственной ванны улавливания, после операции цинкования из цианидного электролита. Показана более высокая электрохимическая стойкость анода на основе диоксида свинца на титане по сравнению с известными электрохимически стойкими нерастворимыми анодными материалами, такими как платинированный титан и платинированный ниобий. | Large amounts of cyanide ions are brought into a reclaim tank from zinc or cadmium plating tank using a cyanide bath. Cyanide ions are oxidized at the anode in the course of electrolysis. Graphite anodes are oxidized quickly forming also a non-settling slurry. Platinized titanium or niobium are stable as anodes in various solutions, however, in solutions containing 0,3-8,0 g/l of NaCN platinum coating is disappearing from the surface of the anode (is dissolving) within 6 to 8 months, resulting in a current drop and the oxidation rate of cyanide ions (Figs. 1,2). Stainless steel as a cheap substitute of platinized anodes, is unsuitable since it is also dissolving creating metal impurities containing water in the reclaim tank. Cyanide oxidation rate on stainless steel is also low. A stable anode material based on titanium and lead dioxide was developed which demonstrated high electrochemical stability. It has high anodic stability in the course of 8 months of industrial tests. The anode may work at current density of 25 A/dm2 and allows to reduce the CN- ions concentration in the reclaim tank down to 1 g/l and Zn down to 0,36 g/l (Fig.4) thus reducing the input to waste water: CN- by 100-150 times and Zn (II) – by 50-100 times. |
| Текст/Text | http://elibrary.ru/item.asp?id=21302004 | |