Antibiotics have saved countless lives and continue to be the backbone for treating bacterial infections. β-Lactam antibiotics have been successfully introduced as antibacterial agents in the early 1950s. They are still the most popular drugs for treating bacterial infections of many diseases. As a result, the biological applications of these compounds and their complexes have attracted remarkable of metal ions (Cu (II), Co (II), Ni (II), Zn (II), Eu (III), and Tb (III) with amoxicillin(H 2 Ax) (Ax) and some selected amino acids (L-glycine (Gly), L-methionine (Met), L-asparagine (Asn), L-histidine (His) and DL-alanine (Ala) have been investigated potentiometrically, 0.1M KNO 3 ionic strength, in an aqueous medium at 20 o C. The dissociation constants and formation constants of ligands and their metal complexes were calculated from potentiometric data using the Irriving-Rossotti method. The acid-base characteristics of ligands have been examined and discussed. It was found that complexes It has been found that amoxicillin does as a primary ligand for the interaction of metal ions in the presence of glycine, alanine, or histidine amino acids. On the other hand, in the case of methionine or asparagine, amoxicillin acts as a secondary ligand. Stabilities of ternary complexes to metal ions were in the following order: Zn(II)< Cu(II) > Ni(II) >Co(II) for transition metal ions and Eu(III) > Tb(III) for lanthanide metal ions. The concentration distribution curves of the binary and ternary complexes formed in the solution were evaluated as a function of pH using the HYSS program.

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The purpose of community service is to provide solutions to the waste management problems faced by the people on the island. Through community service, it is expected to be able to provide education and training to the public in environmentally friendly waste management and to provide an alternative for effective and safe waste handling through the use of incinerators. With this urgency, incineration of waste using plate material in the form of drums or iron plates (incinerator) can be an effective alternative in overcoming the problem of waste handling and minimizing the negative impact on the environment and public health.

Eco-friendly nanocomposite (HS) was prepared from agriculture sources and characterized for remediation of wastewater from lead and cadmium ions. The nanocomposite was prepared from humic acid with silica (HS) which was prepared from compost and rice husk. The nanocomposite was characterized by FTIR, XRD, SEM, Zeta potential, BET and SEM-EDX. The removal of metal ions was studied using a variety of operating parameters, including pH, metal ion concentration, adsorbent dosage, and contact time. In both Pb 2+ and Cd 2+ , the best removal efficiency was found at pH 5.6 and 6. Pb 2+ and Cd 2+ had equilibrium times of 30 and 60 minutes, respectively. The adsorption process was exothermic and spontaneous in nature, according to thermodynamics. In terms of describing and evaluating the adsorption process, the Langmuir, Freundlich, and Temkin models are the most accurate, according to isotherm adsorption studies. Nanocomposite (HS) before and after adsorption was confirmed by EDX to involve lead and cadmium ions. The adsorption capacity of HS was 22.86 and 6.25 mg/g for Pb 2+ and Cd 2+ , respectively.