5 Chemicals from agricultural activities
CMP-24EDIT2(13July04).doc 36 5.5 Use of pesticides Coinciding with the increasing use of fertilizers is a growing use of pesticides, herbicides and other chemicals for the control of insects, weeds and fungal pathogens. A large number of these chemicals, with a wide range of different physical and chemical properties, are
CMP-24EDIT2(13July04).doc 92 Every effort should be made to prevent blooms forming, and this is the primary management approach. Where there are heavy algal blooms, it is best to consider an alternative source of water unless appropriate treatment is available. Aluminium (Al)
CMP-24EDIT2(13July04).doc 7 Chemicals from industrial
CMP-24EDIT2(13July04).doc 47 7 Chemicals from industrial activities 7.1 Introduction In a catchment area, industries, particularly those involved in extraction, manufacturing and processing, may be important in the assessment of chemical risks of drinking-water because they can be the source of significant contamination.
CMP-24EDIT2(13July04).doc 40 Table 5.1 Chemicals derived from human settlements Source category Activity or hydrological event Source description Target water body Chemicals of concern Remarks On-site sanitation and sewerage Sanitation facilities, including sewage treatment plants Surface waters and groundwaters
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CMP-24EDIT2(13July04).doc 8 Chemicals from water … 8 Chemicals from water treatment and Chemicals from water treatment and distribution reach drinking Other chemicals and materials used in water treatment
CMP-24EDIT2(13July04).doc 32 5 Chemicals from agricultural activities 5.1 Introduction World population and economic growth are driving an increasing demand for agricultural products. Coupled with the finite extent to which further land can be converted to agricultural use, this increasing demand has intensified the use of available agricultural land — a trend that is expected to continue.
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CMP-24EDIT2(13July04).doc 8 Chemicals from water … 8 Chemicals from water treatment and Chemicals from water treatment and distribution reach drinking Other chemicals and materials used in water treatment
CMP-24EDIT2(13July04).doc 8 Chemicals from water . 8 Chemicals from water treatment and distribution 8.1 Introduction Chemicals from water treatment and distribution reach drinking-water by the most direct route. They fall into three broad categories: • substances resulting from the addition of chemicals used in the treatment process for
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CMP-24EDIT2(13July04).doc 8 Chemicals from water treatment agencies properly manage any chemicals that they use. In many cases, the best method of control is through management practices, such as optimization of the treatment process, and regulation of materials and chemicals that come into contact with drinking-water, rather than through
CMP-24EDIT2(13July04).doc 8 Chemicals from water . Guidelines for Drinking-water Quality (WHO, 2004) has a section on approval and control of chemicals and materials for use in contact with drinking-water that provides guidance on product specification.
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CMP 24EDIT2(13July04).doc 7 Chemicals from industrial . metals, and mineral processing chemicals, such as cyanide. Water pumped from abandoned mine shafts and open cut pits is often used for water supply, and is generally safe and reliable.
Cmp-24edit2(13july04).doc 55 8 chemicals from water treatment and distribution 8.1 introduction chemicals from water treatment and distribution reach drinking-water...
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