Wyniki wyszukiwania - BazTech

Ograniczanie wyników

2 2023

Znaleziono wyników: 2

Liczba wyników na stronie

Wyniki wyszukiwania

Sortuj według:

Ogranicz wyniki do:

Organic Removal in the Water Body as the Effect of Mineral Wool Installation

Fathuna Inat Shani, Soewondo Prayatni, Prayogo Wisnu, Awfa Dion

Journal of Ecological Engineering

2023

Vol. 24, nr 9

345--354

In previous studies, the use of mineral wools as an onsite-supporting media in water bodies showed satisfactory results in removing organic pollutants. However, the analytical method chosen is still very conventional. This study aimed to model the removal of organic pollutants represented by the COD value to determine the mineral performance. The data used in this study included field scale data using two types of mineral wools, namely type I (density 80 kg/m3 and water retention 95%) and type II (density 120 kg/m3 and water retention 92%). There are form variations of mineral wool namely cubes and blocks on each type, which are placed in segments 2, 4, 8, and 9, respectively, on the Cikapayang River. The modeling results show that the most optimal type of mineral wool to remove COD is type II mineral wool-cube form at segment 4 using the first order kinetics equation. The reaction coefficient (k) obtained is 0.5378/s, standard deviation value is 14.532 mg/L COD, and the coefficient of determination is 0.1025. The kinetics value of the reaction removal and equations obtained were used to perform modeling in Matlab R2020b application to determine the dimensions of the mineral wool required to remove pollutants.

Health Risk Assessment of Heavy Metals on Total Suspended Particles in Semi Urban, Urban, and Industrial Areas of Bandung Metropolitan Area, Indonesia

Fitria Novi, Fillaeli Annisa, Jelsih Marcelina, Koesmawati Tiny Agustini, Fitria Laili, Awfa Dion, Qadafi Muammar, Hanami Zarah Arwieny, Suryawan I. Wayan Koko, Prayogo Wisnu, Ikhwali M. Faisi, Nurhalimah Sri Marliah

Ecological Engineering & Environmental Technology

2023

Vol. 24, iss. 5

131--140

Total Suspended Particulates (TSP) in ambient air contain metallic elements and can be inhaled by humans. Inhaled metal elements risk public health with long-term exposure because metallic elements are carcinogenic in the human body. This study aimed to analyze metallic elements and assess their risk to public health in the Bandung area and its surroundings. The metal elements analyzed in this research are Pb, Al, and Mn. Ambient air sampling was carried out in five industrial areas: Bandung Wetan, Buahbatu, Cibeureum, Padalarang, and Cimahi. High Volume Air Sampler (HVAS) is for sampling TSP in ambient air, and X-Ray Fluorescence (XRF) was used to analyze metallic elements. The results of the study showed that the Cimahi location gave the highest TSP level (126.7 g/m3) and the lowest is Padalarang (15.1 μg/m3). The metal elements concentrations, Pb, Al, and Mn were varied widely of 7.1–29.21 ng/m3, 1054.9–1700.1 ng/m3, and 8.91–14.79 ng/m3, respectively. Risk analysis was determined by calculating ADDinhale, Hazard Quotient (HQ), and Hazard Index (HI) to determine whether there is a potential non–carcinogenic effect on public health. Each industrial area gives an HI value > 1.0 and Buahbatu has the highest HI. This study proves that Pb significantly contributes to the increased risk of community exposure to non-carcinogenic effects.