The need for hand soap is increasing along with the increase of public awareness to maintain cleanliness and health. Commercial hand soaps are made from various chemical mixtures which often give side effects in the form of allergies in people who have sensitive skin. The production of soap with natural ingredients can be a way to solve these problems. In this paper, we report an observational study of the effect of adding binahong leaf oil extract, which is known to have antiseptic properties and is often used as an itching remedy, on the characteristics of liquid hand soap. The research was carried out with the steps of preparation of binahong leaf, binahong leaf oil extract, and production of soap based-binahong leaf extract oil with various concentrations of mixing ingredients. The analysis carried out in this experiment were the analysis of physical and chemical properties as well as the effectiveness of the soap against bacteria after the use of the liquid hand soap. The addition of binahong leaf extract oil in the liquid hand soap can increase the antibacterial properties of the liquid hand soap and has the potential to be used as a soap that is safer for daily use.
Perak adalah logam yang digunakan secara luas dalam berbagai industri, meliputi fotografi (bahan dasar film dan kertas foto), elektronik, perhiasan, campuran logam (alloy) penghambat korosi, dan sebagainya sampai keskala laboratorium. Kandungan perak dalam limbah sebesar lebih dari 2000 mg/Lyang berpotensi menyebabkan toksisitas lingkungan dan kesehatan bagi makhluk hidup. Oleh karena itu, perlu dilakukan pemisahan logam perak dalam limbah dengan metode Emulsion Liquid Membrane (ELM) dengan campuran pembawa D2EHPA-TBP yang memiliki efektivitas dan selektivitas yang tinggi terhadap ion logam Ag. Produk perak yang didapatkan sebagai penyedia perak kedua. Hasil yang didapatkan dengan penggunaan pembawa D2EHPA-TBP lebih efektif untuk mengambil perak dari limbah daripada larutan Ag+. Pembawa D2EHPA-TBP menggunakan perak tiosulfat (sinergi) relatif selektif daripada Cu(II) dan Cr(VI) dengan persen pengambilan perak sebesar 94,93%.Kata Kunci: ELM; Logam Perak; selektif; D2EHPA
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