| dc.description.abstract | Heavy metal pollution such as aluminum (Al) and manganese (Mn) in water
can have negative impacts on the environment and human health. Chitosan has active
amino (NH2) and hydroxyl (OH) groups, which are able to adsorb heavy metal ions
such as (Al) and (Mn) through chemical interactions. To reduce the levels of heavy
metals in water, chitosan extracted from white shrimp shells (Litopenaeus vannamei)
can be used. Analysis of Al and Mn metal levels was carried out using the ICP-OES
(Inductively Coupled Plasma - Optical Emission Spectrometry) method. This study
aims to test the effectiveness of chitosan in reducing Al and Mn levels in Tembung
River water. Chitosan is obtained through the deacetylation process of chitin using
50% NaOH solution and dried before being applied as an adsorbent. Testing was
carried out with variations of 0%, 1%, 3%, 5%, 7%, 9% chitosan to determine the
adsorption efficiency. The results of the study showed that at a dose of 9%, the
absorption efficiency of Al and Mn reached more than 80% while the doses at 5% and
7% showed an efficiency of around 60 - 70%. The optimal contact time was found to
be in the range of 90 - 120 minutes for maximum results. This is in accordance with
the standard for river water quality (Regulation number 22 of 2021 which stipulates
0.2 mg/L for Al and 0.1 mg / L for Mn), Chitosan from white shrimp shells has the
potential as an environmentally friendly natural material in the treatment of water
contaminated with heavy metals. | en_US |
