查詢結果分析
來源資料
相關文獻
- Effects of Different Ions on Mobility of Paraquat in Films of Soil Clays
- 銅錳離子的競爭吸附對巴拉刈在黏粒膜層中移動性的影響
- Effects of Layer Charge of Soil Clays on Release of Fixed Ammonium
- DNA Cleavage effect and Cytotoxicity of the Waste water Discharged from Paraquat Manufactory
- 巴拉刈中毒之肝臟生化學變化
- Lipid Peroxidation and Antioxidative Enzymes in Detached Rice Leaves Exposed to Paraquat
- The Pathology and Pathophysiology of Paraquat-induced Lung Injury
- 兒童巴拉刈中毒:三病例報告
- 水中巴拉刈分析方法之研究線上前濃縮系統及高效率液相層析儀法
- 巴拉刈與年年春中毒
頁籤選單縮合
題名 | Effects of Different Ions on Mobility of Paraquat in Films of Soil Clays=不同離子對巴拉刈在土壤粘粒膜層中移動性的影響 |
---|---|
作者 | 陳鴻基; Chen, Horng-ji; |
期刊 | 農林學報 |
出版日期 | 20001200 |
卷期 | 49:4 2000.12[民89.12] |
頁次 | 頁1-17 |
分類號 | 434.223 |
語文 | eng |
關鍵詞 | 層面電荷; 巴拉刈; 循環式伏安法; Layer charge; Paraquat; Cyclic voltammetry; |
中文摘要 | 巴拉刈是臺灣廣被使用的一種殺草劑,可強有力地吸附在土壤中,不過其移動性會 受到不同粘土礦物種類之層面電荷所響。其對地下水潛在的污染性是值得注意和關切。因此, 採用電化學循環式伏安法技術進一步探討其在天然土壤粘粒中的移動性。試驗結果指出巴拉 刈的陰極還原電流會隨著其在粘粒膜層中移動速率之增加而增加。Fe2+的存在會影響巴拉刈 陰極還原電流的量,其主要乃因電極表面上的Fe2+會接收電子當成巴拉刈陰極還原電流量減 少,另外由於粘土礦物O平面上已被還原之Fe將巴拉刈二價離子還原成一價離子,使偵測 到的還原電流量減少。此外,Fe2+的存在會影響巴拉刈的還原電流量、移動性和可逆性,其 他受到SO42-在土壤粘粒邊緣的特殊性吸附與SO42-和粘土礦物O平面上內圈複合物之Fe2+的 鍵結所影響。這些平面上特殊窅電荷會影響巴拉刈的陰極還原電流量與可逆性。電化學循環 式伏安法技術是一種可用來探討研究巴拉刈在粘土礦物與土壤粘粒表面上吸附機制的方法和 工具。 |
英文摘要 | Parraquat is a herbicide which have been widely used in Taiwan. It can be adsorbed strongly by soils, but its mobility may be affected by layer charge of different clay minerals. Its potential pollution for ground water will be attended and concerned. Therefore, we studied the mobility of paraquat in natural soil clays with cyclic voltammetry technique of electrochemistry. The results indicated that peak currents of cathodes(ipc) of paraquat(PQ2+) increased with the increase of mobility, and Fe2+ affected the amounts of ipc the hand relation with receiving electron of Fe2+ from electrode's surface causing decrease of ipc. Moreover, reduced Fe of inner-sphere complex on O plane promoted reduction of PQ2+ to PQ+. Furthermore, presence of Fe2+ would affect ipc, mobility and reversibility of PQ2+, that were mainly affected by special adsorption of SO42- on edges of soil clays and bonding between SO42- and Fe2+ of inner-sphere complex on O plane of clay minerals. Special negative charge of those planes could affect ipc and reversibility of PQ2+. Cyclic voltammetry technique of electrochemistry was a method and tool used to study adsorptive mechanisms of paraquat ions on clay minerals and soil clays. |
本系統之摘要資訊系依該期刊論文摘要之資訊為主。