oxides fe and mn bearing amendments

... in soils The solubility of Fe( II) and Mn( II) is greater than that of Fe( III) and Mn( IV) and thus Fe( III) and Mn( IV) reduction result in an increase in dissolved iron and manganese in pore waters ... quality problems (Anderson and Lovley, 1997) Most of the Fe( II) and Mn( II) produced from microbial Fe( III) and Mn( IV) reduction is found in solid phases, often in the form of Fe( II) and Mn( II) minerals ... Mechanisms for Electron Transfer to Fe( III) and Mn( IV) The mechanisms by which Fe( III)- and Mn( IV)-reducing microorganisms transfer electrons to insoluble Fe( III) and Mn( IV) are poorly understood...

Ngày tải lên: 15/03/2014, 23:56

... + 2H2O + 2e MnO2 +4H+ + e MnO2 +4H+ + 2e Mn3 + + e Mn2 + + 4H2O Eo = 1,52 V MnO2 + 2H2O Eo = 1,69V MnO2 + OHEo = 0,57 V MnO42Eo = 0,564 V MnO2 + 2H2O Eo = 1,26V MnO2 + 4OHEo = 0,71V Mn3 + + 2H2O ... Fe3 + + SCN- [Fe( SCN)6]3- SCN- tỏc dng vi ion Fe3 + mụi trng axit to phc mu mỏu Thnh phn phc thay i tựy theo nng ion SCN -: [Fe( SCN)]2+, [Fe( SCN)2]+, [Fe( SCN)3], [Fe( SCN)4]-, [Fe( SCN)5]2-, [Fe( SCN)6]3-, ... Nguyờn tc ca phng phỏp xỏc nh Fe2 +: Chuyn Fe2 + v Fe3 +: 2Fe2 + + S2O82 2Fe3 + + SO42Cho Fe3 + to phc vi SCN - v o mt quang, mt quang s t l vi hm lng Fe3 +: Fe3 + + SCN [Fe( SCN)6] 32.5.2 Xõy dng ng chun...

Ngày tải lên: 19/12/2013, 11:28

... tỷ lệ mol (Mn2 + + Fe3 +)/PVA, tỷ lệ mol Fe/ Mn Đối với pha oxit hỗn hợp Fe2 O3 – Mn2 O3, điều kiện thích hợp là: nhiệt độ nung 5500C, tỷ lệ mol Fe/ Mn = 1:1, pH = 4, tỷ lệ mol (Mn 2+ + Fe3 +)/PVA = ... XRD, SEM, BET - Nghiên cứu khả hấp phụ As, Fe, Mn vật liệu oxit hỗn hợp Mn 2O3 – Fe2 O3 - Nghiên cứu khả hấp phụ As, Fe, Mn vật liệu oxit hỗn hợp Mn 2O3 – Fe2 O3 cát thạch anh Từ thu kết sau đây: ... from arsenic -bearing Fe Mn binary oxide: Effects of Eh condition”, Chemosphere 83, pp.1020–1027 51 Jennifer A, Wilkie, Janet G Hering (1996), “Adsorption of onto hydrous ferric oxide: effects of...

Ngày tải lên: 10/02/2014, 20:48

... parameter is most affected, for Mn( III)heme–HSA and Mn( III)heme– HSA-myristate at : : 3, : : 4.5, and : : molar ratios Values of pK for the three titration steps, obtained at the different Mn( III)heme–HSA-myristate ... Myristate and Mn( III)heme binding to HSA–heme G Fanali et al Table Values of the thermodynamic dissociation constants (M) for myristate and Mn( III)heme binding to HSA at pH 7.0 and 10.0 (Scheme and ... site FAx Indeed, the HSA affinity for Mn( III)heme and the absorbance of Mn( III)heme–HSA increase by factors of about 10 and 3, respectively, and myristate effects become much attenuated Still,...

Ngày tải lên: 20/02/2014, 02:22

Ngày tải lên: 26/02/2014, 22:20

... sau: - Hợp kim nặng hệ hai nguyên W9 0Fe1 0 - HKN hệ ba nguyên W9 0Fe9 ,96C0,04 - HKN hệ bốn nguyên W9 0Fe9 ,79Ni0,17C0,04 - HKN hệ tám nguyên W9 0Fe9 ,59Ni0,17Cr0,08 Mn0 ,07Mo0,025Si0,025C0,04 Sau phối ... nặng W9 0Fe1 0 n - Hợp kim nặng W9 0Fe1 0 có = 16,53 g.cm-3, b = 800 MPa, độ cứng 78 HRA - Tổ chức HKN W9 0Fe1 0 gồm hạt W phân bố tơng đối đồng Fe Trong tổ chức HKN có hợp chất liên kim Fe7 W6 5.2 ... 5.17: Tổ chức HKN nguyên sau Hình 5.19: Tổ chức HKN nguyên sau ram Fe FeO Fe7 W6 W Thành phần pha HKN sau (hình 5.18) gồm pha W, Fe7 W6, mactenxit, nhiên píc pha thấp Hình 5.18 Giản đồ nhiễu xạ...

Ngày tải lên: 03/04/2014, 18:34

... contact cylindrical contact ball bearings cylindrical roller bearings ball bearings ball bearings bearings roller bearings roller bearings bearings Deep groove ball bearings Characteristics Load ... rolling bearings Cylindrical roller bearing Fig 1.3 Rolling bearings fall into two main classifications: ball bearings and roller bearings Ball bearings are classified according to their bearing ... temperature applications (6) Bearing rigidity can be improved by preloading 1.3.4 Standard bearings and special bearings Bearings which are internationally standardized as to shape and size are much more...

Ngày tải lên: 12/08/2014, 02:20

... ¡Reinspect bearing s internal clearances ¡Review accuracy of shaft and housing finish ¡Review rigidity of shaft and housing  Bearing Damage and Corrective Measures Table 16.1 Bearing damage and corrective ... those for standard deep groove ball bearings For standard fit and application conditions, a C3 clearance is used with this bearing For more detailed information concerning this bearing and the availability ... especially effective in countering reduced wear life due to the effects of infiltration by dust and other foreign matter ¡TMB ball bearings' special characteristics are identical to standard bearings...

Ngày tải lên: 12/08/2014, 02:20

... Refers to adapter mass Note: For bearing dimensions, basic rated loads, allowable rotations, and mass, refer to pages B-80 to B-82 Adapters for series 12 bearings can also be used with H2 and ... Refers to adapter mass Note: For bearing dimensions, basic rated loads, allowable rotations, and mass, refer to pages B-80 to B-82 Adapters for series 12 bearings can also be used with H2 and ... Refers to adapter mass Note: For bearing dimensions, basic rated loads, allowable rotations, and mass, refer to pages B-80 to B-82 Adapters for series 12 bearings can also be used with H2 and...

Ngày tải lên: 12/08/2014, 02:20

... represents a bearing with hollow rollers and pin type cage B-129 ●Tapered Roller Bearings Single row tapered roller bearings Double row tapered roller bearings Four row tapered roller bearings Types, ... bearing s "subunits" Subunit dimensions are standardized under ISO or ABMA standards, and unified subunits are interchangeable within each dimensional standard However, high precision grade bearings ... inner rings and two double row outer rings Four row tapered roller bearings (2) Bearings wear life is greatly improved through the use of induction hardening and, for large-sized bearings, hollow...

Ngày tải lên: 12/08/2014, 02:20

... the chamfer dimensions on the back face of the inner and outer rings, installation dimensions ras and r1as are larger than the maximum value For the inner bore diameter of bearings with bearing ... the chamfer dimensions on the back face of the inner and outer rings, installation dimensions ras and r1as are larger than the maximum value For the inner bore diameter of bearings with bearing ... the chamfer dimensions on the back face of the inner and outer rings, installation dimensions ras and r1as are larger than the maximum value For the inner bore diameter of bearings with bearing...

Ngày tải lên: 12/08/2014, 02:20

... the chamfer dimensions on the back face of the inner and outer rings, installation dimensions ras and r1as are larger than the maximum value For the inner bore diameter of bearings with bearing ... the chamfer dimensions on the back face of the inner and outer rings, installation dimensions ras and r1as are larger than the maximum value For the inner bore diameter of bearings with bearing ... the chamfer dimensions on the back face of the inner and outer rings, installation dimensions ras and r1as are larger than the maximum value Bearing numbers marked "＃" designate J-series bearings...

Ngày tải lên: 12/08/2014, 02:20

... Note: Bearing numbers marked "＊" designate inch system bearings Bearing numbers marked "☆" designate bearing with hollow rollers and pin type cages B-217 83.2 111 77.9 ●Four Row Tapered Roller Bearings ... Note: Bearing numbers marked "＊" designate inch system bearings Bearing numbers marked "☆" designate bearing with hollow rollers and pin type cages B-219 Sa (approx.) ●Four Row Tapered Roller Bearings ... Note: Bearing numbers marked "＊" designate inch system bearings Bearing numbers marked "☆" designate bearing with hollow rollers and pin type cages B-223 11 750 1,080 ●Four Row Tapered Roller Bearings...

Ngày tải lên: 12/08/2014, 02:20

... Roller Bearings Standard cage types h Standard cage types for self-aligning bearings are shown in Table In general, pressed cages are standard for small sized bearings, and machined cages are standard ... Note: Please refer to page B-232 to B-235 for bearing dimensions, rated loads, allowable rotations, and mass Please refer to page D-2 to D-10 and D-12 to D-14 for adapter locknut and washer dimensions ... Note: Please refer to page B-234 to B-237 for bearing dimensions, rated loads, allowable rotations, and mass Please refer to page D-2 to D-10 and D-12 to D-14 for adapter locknut and washer dimensions...

Ngày tải lên: 12/08/2014, 02:20

... lệ mol Mn /Fe= 1:1 có pha ô xít hỗn hợp Fe2 O 3Mn2 O3 Do vậy, để điều chế oxit hỗn hợp Fe2 O3 -Mn2 O3 chọn tỷ lệ mol Mn /Fe =1:1 48 Mn /Fe= 1/9 Mn /Fe= 1/3 Mn /Fe= 1/1 Mn /Fe= 3/1 Mn /Fe= 9/1 Mn2 O3 Fe2 O3 Mn3 O4 Hình ... mol Mn /Fe= 9:1 có pha kết tinh Mn2 O3, Fe2 O3 Mn3 O4 Ở tỷ lệ mol Mn /Fe = 3:1 xuất hỗn hợp pha tinh thể Mn2 O3 Fe2 O3 phần nhỏ pha Mn3 O4 Ở tỷ lệ mol Mn /Fe= 1:3 1:9 xuất pha Fe2 O3 không thấy xuất tinh thể ... As(III) Mn2 O3 – Fe2 O3/ T.A 54 Bảng 3.14 Dung lượng hấp phụ As(V) Mn2 O3 – Fe2 O3 / T.A 55 Bảng 3.15 Dung lượng hấp phụ Fe( III) Mn2 O3 – Fe2 O3 / T.A 56 Bảng 3.16 Dung lượng hấp phụ Mn( II) Mn2 O3 – Fe2 O3/...

Ngày tải lên: 08/01/2015, 12:52

... phép o phổ h p th ngu n tử c a Zn Fe Cu Mn k t qu thu c ng 3.1 27 Bảng 3.1: Điều kiện tối ưu cho phép đo phổ hấp thụ nguyên tử Zn, Fe, Cu, Mn Ngu n tố Zn Fe Cu Mn 213,9 248,3 324,8 279,5 0,7 0,2 ... xác định khoảng tuyến tính, ứng dụng cho phép đo Zn, Fe, Cu, Mn Đ pha c nh kho ng tu n t nh c a Zn Fe Cu Mn ch ng t i ti n h nh ẫu c a Zn Fe Cu Mn v chuẩn n n HNO3 2% NH4Ac 1% cho n ng t ng d n ... c a Fe v t nh to n LOD LOQ c a Fe 43 3323 X d ng ường chuẩn c a Cu v t nh to n LOD LOQ c a Cu 45 3324 X d ng ường chuẩn c a Mn v t nh to n LOD LOQ c a Mn 47 34 n dụn p ươn p áp p ân tíc Fe...

Ngày tải lên: 20/07/2015, 11:29

... promising, the groups differ in abilities to ferment sugars and have different cell wall/ surface characteristics It is thus possible that different strains mediate different cancer killing mechanisms ... instillation and mediate the recruitment of monocytes and CD4+ T-cells [26] CD4+ T-cells are a good source of interferon gamma (IFNγ) [27] and are potent in activating cytotoxic effector cells ... extend my heartfelt gratitude to my supervisors, Dr Ratha Mahendran, Prof Bay Boon Huat and A/P Lee Yuan Kun for their direction and invaluable advice throughout my candidature and during the...

Ngày tải lên: 14/09/2015, 14:08

... ZnMn2O4, ZnMn3O7, Mn3 O4, ZnMnO3, and MnO in both as-deposited and annealed samples Magnetization value of Zn0.9 4Mn0 .06O nanocluster assembled films increased with increasing temperatures and reached ... valence band which split into three bands under the influence of spin-orbit interactions and crystal-field effects Three bands splitted in valence band and thus transition from these bands dominated ... polymer15, oxides1 6, carbon17 and nitrides18 can show ferromagnetism behavior with or without dopants Various ferromagnetism mechanisms such as carrier-mediated ferromagnetism19,20, defect-mediated ferromagnetism21,22,...

Ngày tải lên: 04/10/2015, 10:24

... ZnMn2O4, ZnMn3O7, Mn3 O4, ZnMnO3, and MnO in both as-deposited and annealed samples Magnetization value of Zn0.9 4Mn0 .06O nanocluster assembled films increased with increasing temperatures and reached ... valence band which split into three bands under the influence of spin-orbit interactions and crystal-field effects Three bands splitted in valence band and thus transition from these bands dominated ... polymer15, oxides1 6, carbon17 and nitrides18 can show ferromagnetism behavior with or without dopants Various ferromagnetism mechanisms such as carrier-mediated ferromagnetism19,20, defect-mediated ferromagnetism21,22,...

Ngày tải lên: 12/10/2015, 17:33

... (sắt từ) FeO .Fe 2O3 (72,4% Fe) ; quặng hematit (Sắt đỏ, xpecularit, lepidomelan) Fe2 O3 (70% Fe) ; quặng sắt nâu (limonit) Fe2 O3.nH2O (n = 1÷ 1,5; 59,8% Fe) ; quặng xiderit FeCO3 (48,3% Fe) ; quặng ... hình 3.4 Bảng 3.5: Số liệu khảo sát khả hấp phụ VLHP Fe( II), Mn( II), Cr(VI) Tên mẫu M1 M2 M3 Ion Fe( II) Mn( II) Cr(VI) Fe( II) Mn( II) Cr(VI) Fe( II) Mn( II) Cr(VI) Co(mg/L) Ccb (mg/L) 52,08 50,79 51,49 ... cực đại số Langmuir Fe( II), Mn( II) Cr(VI) 52 Bảng 3.20: Ảnh hưởng ion Mg(II), Ca(II) đến khả hấp phụ Fe( II), Mn( II), Cr(VI) 53 Bảng 3.21: Kết xử lí Fe( II), Mn( II), Cr(VI) nước...

Ngày tải lên: 16/12/2016, 09:51