DSpace community: 台灣溫泉研究發展中心

Isotherm, Kinetics and Thermodynamics of Cu(II) and Pb(II) Adsorption on Groundwater Treatment Sludge-Derived Manganese Dioxide for Wastewater Treatment Applications

title: Isotherm, Kinetics and Thermodynamics of Cu(II) and Pb(II) Adsorption on Groundwater Treatment Sludge-Derived Manganese Dioxide for Wastewater Treatment Applications abstract: The ubiquitous occurrence of heavy metals in the aquatic environment remains a serious environmental and health issue. The recovery of metals from wastes and their use for the abatement of toxic heavy metals from contaminated waters appear to be practical approaches. In this study, manganese was recovered from groundwater treatment sludge via reductive acid leaching and converted into spherical aggregates of high-purity MnO2. The as-synthesized MnO2 was used to adsorb Cu(II) and Pb(II) from single-component metal solutions. High metal uptake of 119.90 mg g(-1) for Cu(II) and 177.89 mg g(-1) for Pb(II) was attained at initial metal ion concentration, solution pH, and temperature of 200 mg L-1, 5.0, and 25 degrees C, respectively. The Langmuir isotherm model best described the equilibrium metal adsorption, indicating that a single layer of Cu(II) or Pb(II) was formed on the surface of the MnO2 adsorbent. The pseudo-second-order model adequately fit the Cu(II) and Pb(II) kinetic data confirming that chemisorption was the rate-limiting step. Thermodynamic studies revealed that Cu(II) or Pb(II) adsorption onto MnO2 was spontaneous, endothermic, and had increased randomness. Overall, the use of MnO2 prepared from groundwater treatment sludge is an effective, economical, and environmentally sustainable substitute to expensive reagents for toxic metal ion removal from water matrices.

四重溪溫泉區經營策略指標建構與分析

title: 四重溪溫泉區經營策略指標建構與分析 abstract: 本研究針對台灣地區溫泉法相關文獻蒐集，進一步瞭解溫泉法之立法內涵，並參考觀光旅館、民宿經營策略、策略管理之研究，結合德爾菲法(Delphi)與層級分析法(Analytic Hierarchy Process; AHP)，針對四重溪溫泉區內的溫泉經營業者與相關飯店經營管理專長之學者專家，進行專家問卷調查，對溫泉業者在溫泉法案通過後的影響認知進行探討，分析了解溫泉產業追求合法化及溫泉法實行後之經營策略，並藉由相對權重之數值進行檢討分析，解析其權重內涵，對四重溪溫泉業者提出策略分析及經營建議，其結果並可作為政府當局擬定相關溫泉管理政策之參考。本研究所建構之層級架構，二階構面權重評估因素之權重依序分別為「業者經營能力」（39.6%）、「溫泉區永續發展」（32.2%）及「政府政策與法令」（28.2%）。其中「業者經營能力」構面中，以「服務品質」（31.3%）最為重要，其次依序為「行銷通路」、「設施規劃設計」、「成本管控」，顯示業者經營方式及服務品質為溫泉旅館永續發展的關鍵因素，必須以親切的服務態度吸引顧客回流，藉由口耳相傳的方式，創造新的客源；在「溫泉區永續發展」構面中，以「溫泉區總量控制」（36.5%）最為重要，顯示在四重溪溫泉區中，溫泉資源已過度開發，業者應該減少抽水量，避免溫泉資源耗盡；在「政府政策與法令」構面中，以「溫泉標章申請」（32.3%）最為重要，顯示當地業者尚未取得溫泉標章者佔大多數，主要原因在於業者經營範圍或用地許可具有爭議，加上申請過程繁雜，降低業者申請意願，故政府必須增加相關輔導機制及配套措施以提高業者合法經營之意願。

Oyster shell reduces PAHs and particulate matter from incense burning

title: Oyster shell reduces PAHs and particulate matter from incense burning abstract: This is the first report showing reduction of particle matter and PAHs from incense burning by addition of oyster shell. Worshiping ancestors and gods by burning incense sticks and joss paper is a very important tradition in many Asian regions. More than 45 % of families in Taiwan burn incense twice a day. Unlike joss paper burning, most of the incense burning occurs indoors, thus creating a risk for human health. Previous reports have indeed evidenced toxicity of incense, notably due to particulate matter and polycyclic aromatic hydrocarbons (PAHs). However, there are few methods to reduce particle matter and PAHs from incense burning. We hypothesize that oyster shell may be used to reduce incense fumes toxicity. Indeed a large amount of unused oyster shell is discarded due to increasing seafood consumption. Here, two types of incense were made in the laboratory, and then 5-30 % of oyster shells were added to the incense to study the reduction of particle matter and PAHs. Results show that reduction of particle matter and PAH emission increased with oyster shell addition. The reduction of emission factors is -35 % for mean particle matter, -21 % for particle-phase PAHs, and -37 % for benzo[a]pyrene equivalent concentration (BaPeq), using 30 % oyster shell additive. The addition of 10 % oyster shell reduces the burning time by 8.3 min, increases the burning rate by 3.4 mg/min, and reduces particle matter by 6.4 mg/g incense, particle-phase PAHs by 0.67 mu g/g incense, and BaPeq by 0.23 mu g/g incense. The reductions of particle matter, particle-phase PAHs, and BaPeq correspond to about 640 metric tons, 67, and 23 kg, respectively, per year. Our findings will help to produce safer and cleaner incense.

New method to evaluate backwash performance of rapid filter in water treatment facility

title: New method to evaluate backwash performance of rapid filter in water treatment facility abstract: 245th National Spring Meeting of the American-Chemical-Society (ACS)