chemistry of soil organic matter

... factors 177 Optimum level of soil organic matter 184 Effects of management on soil organic matter 185 XI1 CONTENTS Effect of long term cropping 185 Effect of cropping methods and ... 273 Sources of sulfur 273 Nature and distribution of organic sulfur in soil 275 Forms of organic sulfur 276 Amount and distribution of organic s...

Ngày tải lên: 30/05/2014, 22:57

... amount of organic carbon was indicator as the amount of biofilm developed on PAC. Figure 5 shows the amount of organic carbon on PAC after each incubation. Figure 6 shows the adsorption isotherm of ... Abstract The objective of this study is to clarify the effect of DOM and biofilm on the adsorption capacity of PAC in the aeration tank of PACT process. The adsorption...

Ngày tải lên: 05/09/2013, 08:40

... the portion of inlet and outlet and at the boundary of nylon nets bags with charcoal, and is adsorption when drainage water contacts the surface of charcoal because of the structure of this equipment. ... during a contact time of more than one hour. The reduction rates of TOC and TN ranged from 20 % to 40 %. The reduction rate of TP ranged from 20 % to 90 %. The reduction...

Ngày tải lên: 05/09/2013, 09:38

... dissolved organic matter, river water, wastewater treatment plant effluent, zinc complexation. INTRODUCTION AND BACKGROUND Dissolved organic matter (DOM) is important in the transport of metals ... Characteristics of DOM in Different Urban Wastewaters, Water Sci. and Technol., (in press). Cheng T. and Allen H. E. (2006). Comparison of zinc complexation properties of d...

Ngày tải lên: 05/09/2013, 10:15

... ABSTRACT The influence of phosphorus concentration on the biodegradation of dissolved organic matter (DOM) was discussed as a possible cause of the accumulation of chemical oxygen demand ... Japan. It has a surface area of 674 km 2 , a volume of 27.5 km 3 , a maximum depth of 104 m, a mean depth of 41 m, a catchment area of 3,174 km 2 and a residence time of 5....

Ngày tải lên: 05/09/2013, 10:17

... and fractions of organic carbon in air-dried and field-moist soils. Soil Biol. Biochem. 20, 737 – 741. Blaser, P., 1994. The role of natural organic matter in the dynamics of metals in forest soils. ... degradation of organic matter by microorganisms, then DOM should play a key role in the stabilisation and destabilisation of soil organic matter, and thus, in C dyna...

Ngày tải lên: 15/03/2014, 23:22

... Sorption of natural dissolved organic matter on soil. Chemo- sphere 1999;38:1505 –15. Spark KM, Wells JD, Johnson BB. Characteristics of the sorption of humic acid by soil minerals. Aust J Soil Res ... humified organic matter. J Soil Sci 1980;31:633 –41. Sauve S, Hendershot W, Allen HE. Solid-solution partitioning of metals in contaminated soils: dependence on pH, total...

Ngày tải lên: 15/03/2014, 23:22

... concentrations of the organic matter. The increase in the organic matter induced by the amendment is due to the manures which has three roles of organic matter sources, of protection of the soil against ... (control) Soil + cM Soil + pM 0 2 4 6 8 10 12 14 16 18 20 Number of earthworms Treatments Figure 1. Average number of earthworms at 0 - 55 cm soil...

Ngày tải lên: 23/03/2014, 21:20

... the scope of this sorption is highly influenced by the presence of organic matter. Ligand exchange-surface complexation, between carboxyl/hydroxyl functional groups of organic matter and metal ... days. The microbial decomposition of organic matter would most likely happen in the inoperative condition of the AIRU. In the biodegradation process of organic matter, t...

Ngày tải lên: 05/09/2013, 09:38