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Pesticides and herbicides

Biocides should not be present in water used for aquaculture. Sources of herbicides and pesticides are mnoff from agricultural land, contamination of the water table, and spray drift from crop-dusting activity. Excessive levels of phosphoms and nitrogen may occur where mnoff from fertilized land enters an aquaculture faciUty either from surface mnoff or groundwater contamination. Trace metal levels should be low as indicated in Tables 4 and 5. [Pg.20]

Marsh and Pond S ediments. Herbicides and pesticides are detectable ia marsh and pond sediments, but intrinsic biodegradation is usually found to be occurting. Littie work has yet been presented where the biodegradation of these compounds has been successfully stimulated by a bioremediation approach. [Pg.35]

The value of all herbicides for crops marketed worldwide in 1980 was estimated at about 4.9 billion (17). The sale of herbicides for weed control in corn in the United States represented 70 and 49% of the world herbicide and pesticide purchases in corn, respectively. The sale of herbicides in soybeans represents 82 and 69% of the world herbicide and pesticide purchases in soybeans, respectively. The sale of herbicides for weed control in row crops in the United States represents 62 and 36% of the world herbicide and pesticide purchases for row crops, respectively. [Pg.17]

Results of the analysis are proposed in Table 8. Cultivation gives an important contribution to the final impact of truffle sauce, while truffle production has a reduced impact, because it is a very extensive production. Olive trees cultivation uses fertilizers, diesel fuel for field operations, electricity for the olives harvest, herbicides and pesticides. [Pg.299]

Interaction effects of mercury with other contaminants, such as herbicides and pesticides, could intensify hazards to avian populations (Mullins et al. 1977). For example, a striking parallel exists between levels of Hg and of DDT and its metabolites in birds of prey, suggesting the existence of common ecotoxicological mechanisms (Delbeke et al. 1984 Wiemeyer et al. 1984) additional research is clearly needed. [Pg.412]

LLE has been used in the past for the extraction of pesticides from environmental water samples [17]. However, its application in the extraction of waste-water samples is scarce due to the low efficiency of extraction, especially for polar analytes. Because of the vast amount of surfactants and natural products present in wastewater samples, emulsions are formed which complicate the process of extraction and lead to low extraction recoveries. However, there have been some useful applications of LLE to wastewater analyses. For example, LLE was found to be effective for the isolation of herbicide and pesticide organic compounds from industrial wastewater samples and also from complex matrices [18]. [Pg.55]

Industrial Agents Chemicals manufactured for industrial purposes rather than to specifically kill or maim human beings. Hydrogen cyanide, cyanogen chloride, phosgene, and chloropicrin are industrial chemicals that can be military agents as well AC, CK, CG, and PS. Many herbicides and pesticides are industrial chemicals that also can be chemical agents. [Pg.317]

The terrestrial environment suffers from the persistence of metals from industrial processes, as well as herbicides and pesticides which may also be transmitted through the food chain with deleterious effects to both individual species and ecosystems. [Pg.358]

In many applications nowadays it is essential to link a mass spectrometer to the gas chromatography in order to achieve positive identification and sensitivity of analysis. Some 12 types of compounds are listed in Table 1.11(a) which are based on the application of this technique, viz. polyaromatic hydrocarbons, polychlorobenphenyls, dioxins, chloro, carbamate and triazine types of herbicides and pesticides, Diazinon, Dicamba, Imidazoline and Cyperquat herbicides and herbicide pesticide mixtures. [Pg.95]

Another growing technique is super-critical fluid chromatography. Recent references to soil analysis include the following applications aliphatic hydrocarbons, polyaromatic hydrocarbons, polychlorobiphenyls, dioxins, alkyl and aryl phosphates, chloro, organophosphorus, triazine, substituted urea, phenoxy acetic acid, Dacthal herbicides and insecticides and mixtures of herbicides and pesticides and mixtures of organic compounds. [Pg.96]

This leads to a business model in which the main goal of the applicator is to look busy to the consumer and to appear to be providing services regularly and effectively. As a result, when asked whether either professionals or homeovm-ers overuse chemicals, many applicators feel that the industiy as a whole tends to use too many inputs of fertilizer, herbicide, and pesticide. An even greater proportion of operators feel that homeowners, when left to their own devices, tend to over-apply as well. Notably, of course, few lawn service providers perceives that their own firm over-applies chemical inputs. (Figure 5.2). [Pg.82]

Sigworth, E.A. Identification and removal of herbicides and pesticides, J. Am. Water Works Assoc., 57 1016-1022, 1964. [Pg.1723]

Activated carbon studies on widely used herbicides and pesticides have shown that it is successful in reducing the concentration of these toxic compounds to very low levels in wastewater [16]. Some examples of these include BHG, DDT, 2,4-D, toxaphene, dieldrin, aldrin, chlordane, malathion, and parathion. Adsorption is affected by many factors, including... [Pg.526]


See other pages where Pesticides and herbicides is mentioned: [Pg.34]    [Pg.35]    [Pg.49]    [Pg.502]    [Pg.327]    [Pg.397]    [Pg.131]    [Pg.225]    [Pg.85]    [Pg.27]    [Pg.312]    [Pg.141]    [Pg.171]    [Pg.171]    [Pg.201]    [Pg.68]    [Pg.324]    [Pg.404]    [Pg.39]    [Pg.166]    [Pg.277]    [Pg.1486]    [Pg.285]    [Pg.652]    [Pg.95]    [Pg.96]    [Pg.115]    [Pg.198]    [Pg.420]    [Pg.159]    [Pg.335]    [Pg.11]    [Pg.101]    [Pg.111]    [Pg.350]    [Pg.850]    [Pg.597]   
See also in sourсe #XX -- [ Pg.585 ]




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