An Investigation of the reaction of immobilization of mercury in waste

Makarova, A.; Fedoseev, A.

Авторы: Makarova A., Fedoseev A.
Сборник: Abstract of The 50th IUPAC General Assembly & 47th IUPAC World Chemistry Congress, 7-12 JULY Paris (France)
Серия: PS2 - CT.7 - Poster session 2 - Red Session -Chemistry accross the themes: CT.7
Тезисы
Год издания: 2019
Место издания: HOPSCOTCH Congres https://www.iupac2019.org/detailed-agenda
Первая страница: 2581
Последняя страница: 2582
Аннотация: The Minamata Convention is an important component to achieve sustainable, inclusive and resilienthuman development through SDGs, and especially SDG Goal 12: Ensure sustainable consumption andproduction patterns. The Convention requires reducing the use of mercury in wastes. Earlier studieshave shown that the emissions of mercury from lamps and other devices can make a significantcontribution to environmental pollution [1]. For the reduction of mercury footprint, we study a processesof immobilization mercury in less hazardous compounds such as water-insoluble mercury sulfide (II),HgS, that being present in the environment in nature.Some basic aspects regarding green chemistry principles, such as minimum energy (without heating)and the formation of minimum waste (without the formation of wastewater) was take into account in theprocess while developing this technology.The proposed method of mercury-containing waste neutralization is based on banding mercury and itscompounds into HgS includes joint grinding of waste with elemental sulfur powder and water in rotatingreactor - drum mill. Figure 1 shows the resulting dependence of the reaction of mercury with sulfur ontime (with constant renewal of phases) in different condition. In a series of experiments, we chose suchconditions of the solid-phase reaction when reaction goes up to 98%. To assess the completeness ofthe reaction, a method was developed for determining the content of mercury ions and/or metallicmercury in the presence of sulfide mercury.For the complete binding of metal and oxidized mercury in HgS, iron (III) chloride and pyrite are addedto the reactor at the final stage of the process. Before the suspension is discharged, the bentonite andwater are added into the mass of neutralizing waste. The resulting stable, fluent, non-demixedsuspension is drained from the mill and to drying compartment with fluid bed or spray dryer. In resultthe dried product is contained less metallic mercury and its compounds (excluding HgS) than TLV = 2.1mg / kg and could be disposed as a waste.
Добавил в систему: Федосеев Андрей Николаевич

	ИСТИНА	Войти в систему Регистрация
	ИСТИНА ИНХС РАН
	Главная Поиск Статистика О проекте Помощь

ИСТИНА

ИСТИНА ИНХС РАН

An Investigation of the reaction of immobilization of mercury in wasteтезисы доклада Электронная публикация

Прикрепленные файлы