Wyniki wyszukiwania - BazTech

Ograniczanie wyników

2 Ecological Engineering & Environmental Technology

Znaleziono wyników: 2

Liczba wyników na stronie

Wyniki wyszukiwania

Sortuj według:

Ogranicz wyniki do:

A systematic review and bibliometric analysis of the process of human health risk assessment to microplastics exposure through seafood consumption

Dullah Arif Atul Mahmuda, Daud Anwar, Mallongi Anwar, Zakir Muhammad, Jafarf Nurhaedar, Indar, Wahiduddin, Putro Gurendro, Birawida Agus Bintara

Ecological Engineering & Environmental Technology

2025

Vol. 26, iss. 2

280--291

The variety of physical and chemical characteristics of microplastics in the environment has caused little research on assessing the health risks from exposure to microplastics. This article aims to review the steps for health risk assessment analysis of human health exposure to microplastics through the consumption of marine biota and provide an explanation of the extent to which health risk assessment research has been conducted. Article searches for this systematic review were conducted in three electronic databases: PubMed, Google Scholar, and Science Direct. The search term used was “health risk assessment for microplastics exposure” with three criteria: free full text, research article, and publication published in the years 2019−2023. Data base management was performed using Mendeley Desktop 1.19.8 and the articles were then analyzed bibliometrically using VOSviewer. A total of 203 articles were retrieved from the databases and 7 articles were eligible for the literature review. Risk assessments have not been widely conducted using health risk analysis procedures because there is no standard assessment of microplastic concentrations in biota. In addition, there is no specific reference dose for each microplastic polymer and the variety of physical characteristics, such as shape, color and size of microplastics, make it difficult to assess actual ingestion. A generally applicable approach to assessing human exposure to microplastics is needed. The approach should include a representative sampling procedure in the environment, a method to identify and calculate microplastic concentrations, a real-time ingestion assessment, and an assessment of specific health effects based on microplastic polymers.

Study into the Effectiveness of Using Activated Carbon of Kluwak Shell (Pangium Edule Reinw) as Adsorbent of Heavy Metals in Wastewater

Rusma Yuyun Sukawati, Taba Paulina, Fauziah St, Zakir Muhammad, Samawi Farid, Assegaf Alimuddin Hamzah

Ecological Engineering & Environmental Technology

2024

Vol. 25, iss. 9

99--108

The purpose of this study is to determine how well activated carbon made from kluwak shell (Pangium edule Reinw) works as an adsorbent to remove Pb(II) and Cu(II) heavy metal ions from wastewater used in laboratories. Kluwak shell was selected as an agricultural waste material due to its high carbon content, which makes it a promising material for activated carbon that can lower Pb(II) and Cu(II) heavy metal levels. Finding the ideal contact time, pH, and adsorption capacity as well as the kinetics and adsorption isotherm model are the main goals of this study. Using 25% KOH for carbonization and chemical activation, Fourier Transform Infrared (FTIR), Scanning Electron Microscopy (SEM), and Surface Area Analyzer (SAA) for characterization are some of the research methods used. FTIR results showed the presence of O-H, C-H, C = C and C-O functional groups, while SEM showed more open pores after activation. SAA analysis indicated an activated carbon surface area of 3.11 m2/g, pore volume of 0.006 cm3/g, and pore diameter of 4.08 nm, categorized as mesoporous. The optimum condition for adsorption of Pb(II) ions is at pH 5 with contact time of 10 minutes and adsorption capacity of 21.83 mg/g. As for Cu(II) ions, the optimum condition is at pH 4 with a contact time of 20 minutes and adsorption capacity of 10.82 mg/g. The adsorption of metal ions is in accordance with the Langmuir isotherm model and pseudo second-order kinetics. The adsorption effectiveness of Pb(II) and Cu(II) ions from laboratory wastewater was 1.69 mg/g and 1.73 mg/g. It is concluded that activated kluwak shell can be used as Pb(II) and Cu(II) metal adsorbent.