Accents with the acronym package

Question

Is there any way to use accents with the acronym package? I need to write the following acronym \ac{{Mónashell}}, but that does not work, nor does \ac{{M\´onashell}}, and the package documentation does not seem to include accents.

\documentclass[a4paper,11pt,fleqn,twoside,openright]{memoir}
\usepackage[english]{babel}
\usepackage{acronym} 
\begin{document}
frontmatter
\begin{acronym}[Sulfiloggerrrrrrrr]
\acro{M\´onashell}{seashell media biofiltration system from Bord na M\´ona}
\acro{WWTP}{wastewater treatment plant}
\acro{H2S}[\ce{H_{2}S}]{hydrogen sulphide}
\end{acronym}
\mainmatter
There are similarities between the observed removal of \ac{H2S} through biofiltration in this study and those described by \cite{Abraham2015}, who demonstrated a removal greater than 99 \% by the utilisation of the \ac{Mónashell} at Lake Wildwood \ac{WWTP}. 
\end{document}

Hope someone can help me with this problem :-)

Answer 1

Avoid special characters in the acronym key, exactly like you do for H2S.

\documentclass[a4paper,11pt,fleqn,twoside,openright]{memoir}
\usepackage[english]{babel}
\usepackage[version=4]{mhchem}
\usepackage{acronym} 
\begin{document}
\frontmatter

\begin{acronym}[Sulfiloggerrrrrrrr]
\acro{MS}[M\'onashell]{seashell media biofiltration system from Bord na M\'ona}
\acro{WWTP}{wastewater treatment plant}
\acro{H2S}[\ce{H_{2}S}]{hydrogen sulphide}
\end{acronym}

\mainmatter

There are similarities between the observed removal of \ac{H2S} 
through biofiltration in this study and those described by 
\cite{Abraham2015}, who demonstrated a removal greater than 99\% 
by the utilisation of the \ac{MS} at Lake Wildwood \ac{WWTP}. 

There are similarities between the observed removal of \ac{H2S} 
through biofiltration in this study and those described by 
\cite{Abraham2015}, who demonstrated a removal greater than 99\% 
by the utilisation of the \ac{MS} at Lake Wildwood \ac{WWTP}. 

\end{document}