Utilization of Eco-Friendly Sugar-Based Polymer as Chelating Agents for Reducing Water Hardness

Galu Murdikaningrum (1) , Johannes Martua Hutagalung (2) , Deri Eka Gustia (3)
(1) Universitas Insan Cendekia Mandiri,
(2) Universitas Insan Cendekia Mandiri,
(3) Universitas Insan Cendekia Mandiri

Abstrak

High water hardness due to the content of calcium ions (Ca²⁺) is a serious problem in both the household and industrial sectors, as it can damage equipment and reduce process efficiency. Generally, the compound sodium tripolyphosphate (STPP) is used to address hardness, but it is non-biodegradable and has the potential to pollute the environment by causing eutrophication. This research aims to evaluate the potential of sugar polymer as an environmentally friendly alternative for reducing water hardness. The sugar polymer was synthesized through the polymerization reaction of sugar with oxalic acid at temperature variations of 90°C, 100°C, 120°C, and 140°C and reaction time variations of 10 and 20 minutes. The resulting synthesized sugar polymer was applied to a 36 dH water sample at a sugar polymer concentration of 10g/L of the water sample. Test results showed that the sugar polymer synthesized at 120°C for 20 minutes was able to significantly reduce water hardness from 36 dH to 11.22 dH. High temperatures in the synthesis process proved to increase the reaction effectiveness between the sugar polymer and calcium ions, whereas at low temperatures, the hardness reduction was less optimal. Reaction time also had an effect, especially at temperatures of 100°C and 120°C, but it had no effect at a temperature of 140°C. The sugar polymer resulted in an increase in the Total Dissolved Solids (TDS) value from 997 ppm to 1279–1380 ppm; this figure is still much lower than the TDS from the use of STPP, which is 4887 ppm. This indicates the advantage of sugar polymer over STPP, in addition to its advantages from a sustainability aspect. Overall, sugar polymer has great potential as a more environmentally friendly hardness-reducing agent; however, to match the effectiveness of STPP, which can reduce hardness to 1.67 dH, further optimization of the formulation and reaction conditions is still required.Keywords: Water hardness, sugar polymer, sodium tripolyphosphate, environmentally friendly

Penulis

Galu Murdikaningrum
Johannes Martua Hutagalung
Deri Eka Gustia

Cara Mengutip

Utilization of Eco-Friendly Sugar-Based Polymer as Chelating Agents for Reducing Water Hardness. (2025). Proceeding International Conference On Sustainable Environment And Innovation (ICOSEI), 1(1). https://doi.org/10.53675/icosei.v1i1.1505

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