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Author: search.filters.author.Kongsin, Ananya

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    The Impact of Organic and Chemical Organic Fertilizers on the Efficiency of Cadmium Mobility Reduction by Potassium Hydroxide Modified Biochar
    (2024-10-02)
    Chaiyaraksa, Chompoonut
    ;
    Kamjan, Thitiya
    ;
    Sankanta, Thanaporn
    ;
    Kongsin, Ananya
    The aim of this study was to investigate the impact of organic and chemical organic fertilizers on the translocation of cadmium in crude oil-contaminated soil treated with potassium hydroxide-modified biochar (KOH-biochar). The soil sample was collected from Chonburi Province. The soil was characterized as moderately acidic sandy loam with relatively low organic matter, medium salinity, medium cation exchange capacity, and high nutrient levels. The concentration of cadmium in the soil fell within the acceptable range for agricultural use. The KOH-biochar exhibited strong alkalinity, a high carbon/nitrogen (C/N) ratio, and an oxygen/carbon (O/C) ratio. Crude oil was slightly acidic, with high organic matter content and low sulfur and cadmium concentrations. The synthetic soil created in this study composed of 5% crude oil, and 100 mg/kg of cadmium. KOH-biochar, organic and chemical organic fertilizers were applied to this synthetic soil. Subsequently, the soil was subjected to extraction with 0.005 M diethylenetriamine pentaacetate (DTPA), and a sequential extraction method was employed to determine six different forms of cadmium in the soil samples. Cadmium concentrations in the extracts were measured using a graphite furnace atomic absorption spectrophotometer. The findings revealed that fertilizers effectively slowed down the movement of cadmium. Fertilizer application led to the transformation of cadmium from unstable forms to more stable forms within the soil. Fertilizer with the highest organic matter content and pH showed the least cadmium mobility. Increased nitrogen and phosphorus content in the fertilizer resulted in slightly higher cadmium mobility within the soil. Conversely, higher potassium content in the fertilizer led to slightly reduced cadmium mobility in the soil.
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    The Linkages between Air Quality Management Related Research and Sustainable Development in Thailand
    (2022-05-01)
    Kanlayanatam, Rakjit
    ;
    Kongsin, Ananya
    ;
    Kittipongvises, Suthirat
    Air pollution is considered one of the greatest environmental threats to human health in our era. This study aimed to evaluate the linkages between related research and studies on air quality management and the global sustainable development goals (SDGs) and to investigate strengths, weaknesses, opportunities, and threats (SWOT) of air quality management strategies in Thailand. By employing the Scale Assessment Method, the results found that SDGs related to human well-being, cities, and climate change were associated with several studies with medium to high level of agreement and evidence. In accordance with SDG 3, many scholars have been performed to investigate the relationship between both long-term and short-term exposure of air pollution and human health. In SDG 11, many cities are increasing concerned about air pollution, especially the annual mean of particulate matter in cities. Regarding SDG 13, although there is no specific headline goal on air pollution and climate change, there are some research papers available on the development of combined climate change and air quality database in Thailand. In terms of SWOT analysis, availability of research database on multi-pollutant models and research prioritization on air pollution topics were identified as key strengths. Lack of integration of air pollution and cross-cutting issues were defined as major weakness. Impacts of COVID-19 on the research direction and budget allocation were categorized as threats in driving air quality management and research development. Multi-dimensional and inter-sectoral.