Remediation of brownfields contaminated by organic compounds and heavy metals: a bench-scale test of a sulfur/vermiculite sorbent for mercury vapor removal.

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F67985858%3A_____%2F20%3A00533656" target="_blank" >RIV/67985858:_____/20:00533656 - isvavai.cz</a>

Výsledek na webu

<a href="http://hdl.handle.net/11104/0311984" target="_blank" >http://hdl.handle.net/11104/0311984</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1007/s11356-020-10696-1" target="_blank" >10.1007/s11356-020-10696-1</a>

Jazyk výsledku

angličtina

Název v původním jazyce

Remediation of brownfields contaminated by organic compounds and heavy metals: a bench-scale test of a sulfur/vermiculite sorbent for mercury vapor removal.

Popis výsledku v původním jazyce

In this study, we report for the first time a novel type of sorbent that can be used for mercury adsorption from the air-based off-gasses-vermiculite impregnated with alkali polysulfides and thiosulfates. In contrast to other sorbents, vermiculite exhibits superior thermal stability in air and low adsorption capacity for organic vapors. This allows for a more favorable design of the soil remediation unit-direct coupling of thermal desorber with catalytic oxidizer using air as a carrier gas. In the bench-scale test at 180 degrees C, the sulfur/vermiculite sorbent exhibited significantly higher efficiency for the adsorption of mercury vapor from the off-gasses than the commercial sulfur/activated carbon sorbent at its highest operating temperature (120 degrees C). The average mercury concentration in the adsorber off-gas decreased from 1.634 mg/m(3) for the sulfur/activated carbon to 0.008 mg/m(3)achieved with impregnated vermiculite. The total concentration of organic compounds in the soil after thermal desorption was below the detection limit of the employed analytical method.

Název v anglickém jazyce

Remediation of brownfields contaminated by organic compounds and heavy metals: a bench-scale test of a sulfur/vermiculite sorbent for mercury vapor removal.

Popis výsledku anglicky

In this study, we report for the first time a novel type of sorbent that can be used for mercury adsorption from the air-based off-gasses-vermiculite impregnated with alkali polysulfides and thiosulfates. In contrast to other sorbents, vermiculite exhibits superior thermal stability in air and low adsorption capacity for organic vapors. This allows for a more favorable design of the soil remediation unit-direct coupling of thermal desorber with catalytic oxidizer using air as a carrier gas. In the bench-scale test at 180 degrees C, the sulfur/vermiculite sorbent exhibited significantly higher efficiency for the adsorption of mercury vapor from the off-gasses than the commercial sulfur/activated carbon sorbent at its highest operating temperature (120 degrees C). The average mercury concentration in the adsorber off-gas decreased from 1.634 mg/m(3) for the sulfur/activated carbon to 0.008 mg/m(3)achieved with impregnated vermiculite. The total concentration of organic compounds in the soil after thermal desorption was below the detection limit of the employed analytical method.

Druh

J_imp - Článek v periodiku v databázi Web of Science

CEP obor

—

OECD FORD obor

20402 - Chemical process engineering

Projekt

<a href="/cs/project/TA04020700" target="_blank" >TA04020700: Dekontaminace brownfieldů komplexně kontaminovaných organickými látkami i těžkými kovy</a><br>

Návaznosti

I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Rok uplatnění

2020

Kód důvěrnosti údajů

S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Název periodika

Environmental Science and Pollution Research

ISSN

0944-1344

e-ISSN

—

Svazek periodika

27

Číslo periodika v rámci svazku

33

Stát vydavatele periodika

DE - Spolková republika Německo

Počet stran výsledku

7

Strana od-do

42182-42188

Kód UT WoS článku

000566047600008

EID výsledku v databázi Scopus

2-s2.0-85090300730