热心 发表于 2025-3-30 09:15:07
L. Henč-Petrinović,I. Dekaris,J. Budišić,L. Ritz-Mutevelićy used: the total production of polystyrene sulphonic resins, used for this purpose, is several times higher than the total output of the corresponding anion exchange materials. For the reasons given in Chapter 3 the process is fundamentally very efficient and the basic operating techniques have cha陈腐思想 发表于 2025-3-30 13:37:26
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e gases, and the temperature and salinity of the water. Concentrations of dissolved oxygen and other dissolved gases at saturation decrease with greater elevation (lower barometric pressure), higher salinity, and rising temperature. Their concentrations in water may be expressed in milligrams per li载货清单 发表于 2025-3-30 21:34:21
T. Avitabile,V. Russo,M. C. Sorce,A. Reibalditurally in most geological formations and soils in varying amounts and forms; the main source of agricultural and industrial phosphate is deposits of the mineral apatite—known as rock phosphate. Municipal and agricultural pollution is a major source of phosphorus to many water bodies. Most dissolved放牧 发表于 2025-3-31 01:11:16
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