Kyushu University · 공학
Mitali Nag 교수의 연구실은 소각灰 및 매립지에서 발생하는 환경 오염 물질, 특히 중금속과 온실가스의 안정화 및 제거를 핵심 목표로 삼고 있습니다. 자연 발생 천연 자원인 멜로디나이트, 어패류 유골 화학적 하이드로옥시apatite, 폐기물 유래 흡착제 등을 활용한 비용 효율적인 환경 정화 기술 개발에 주력하고 있으며, 특히 소각灰 중의 Pb²⁺ 및 Zn²⁺ 등 중금속의 고정화 메커니즘과 매립가스인 질소산화물(N₂O) 발생 메커니즘을 실험적으로 규명하고 있습니다. 이는 폐기물 자원화와 기후 변화 완화를 동시에 고려한 지속 가능한 환경 기술 개발을 추구합니다.
표시된 성과는 수집된 데이터 기준으로 산출되며, 일부 차이가 있을 수 있습니다.
Landfill aeration can accelerate the biological degradation of organic waste and reduce methane production; however, it induces nitrous oxide (N2O), a potent greenhouse gas. Nitrification is one of the pathways of N2O generation as a by-product during aerobic condition. This study was initiated to demonstrate the features of N2O production rate from organic solid waste during nitrification under three different temperatures (20°C, 30°C, and 40°C) and three oxygen concentrations (5%, 10%, and 20%
Investigation of nitrous oxide production potential during in situ aeration in an old landfill site revealed that increased temperatures and oxygen content inside the landfill site are potential factors for nitrous oxide production. Temperatures within the range of optimum nitrification process (30-40°C) induce nitrous oxide formation with high oxygen concentration as a by-product of nitrogen turnover. Decrease of oxygen content during nitrification leads increase of nitrous oxide production, wh
The current study investigated the sorption process of heavy metals, especially lead (Pb2+) and Zinc (Zn2+), in Municipal Solid Waste Incineration (MSWI) fly ash applying natural zeolite, namely mordenite, as an inexpensive adsorbent to assess its feasibility for the treatment of fly ash. Batch experiments were performed to investigate the effects of the influential parameters, such as metals initial ion concentration, dosage of adsorbent, liquid to solid (L/S) ratio, and equilibrium concentrati
Incineration is a common technique worldwide for treating Municipal Solid Waste (MSW). However, incineration residues (e.g., bottom and fly ash) require special treatment to prevent environmental risks due to the high content of heavy metals. The present study evaluated the stabilization degree of Pb, a toxic heavy metal in MSW incineration fly ash (IFA) treating by size-fractionated natural fishbone (FB) hydroxyapatite (HA). Bones from various fish species were used at different size fractions
Stabilizing heavy metals in Municipal Solid Waste Incineration (MSWI) fly ash by using natural zeolite is one of the state-of-the-art technologies. The current study focused on the sorption process of heavy metals by applying mordenite, an inexpensive natural zeolite adsorbent, and assessing the efficacy of the treatment of fly ash. Batch experiments were conducted to investigate the effects of the influential parameters, such as the initial metal ion concentration, the liquid-to-solid (L/S) rat
Fine-fraction of Municipal Solid Waste (MSW) incineration bottom ash (IBA) contains amorphous silica, known as pozzolan is one of the potential heavy metal stabilizers in MSW incineration fly ash (IFA) by forming the cementitious compounds of calcium silicate hydrates (C - S - H) and calcium aluminate hydrates (C-A-H). The technique can be called the 'Ash-by-Ash Treatment Method' (AATM). To optimize the AATM, effects of water (L/S ratios) and IBA amounts (IFA/IBA ratios) were examined in this st
