Trihalomethane, haloacetonitrile, and chloral hydrate formation potentials of organic carbon fractions from sub-tropical forest soils

Zhang, Qian; Kuang, Wan-fang; Liu, Lu-ying; Li, Kexin; Wong, Kevin; Chow, Alex T.; Wong, Po Keung

doi:10.1016/j.jhazmat.2009.07.068

Cited by 30 publications

(15 citation statements)

References 28 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…This is in contrast to [24] who found different rates of N mineralization (NH 4 + +NO 3 − ) in the same soils alongside other soil quality indicators as shown in Table 1. While SUVA is frequently used for assessing the quality of DOC in freshwaters [30], our results indicated that it was incapable of separating between land uses and soil classes over a wide geographical range and is therefore probably unsuited to large scale soil quality assessments. In contrast, total soluble phenols gave the best separation between ecosystem types.…”

Section: Discussionmentioning

confidence: 78%

See 1 more Smart Citation

Evaluation of Dissolved Organic Carbon as a Soil Quality Indicator in National Monitoring Schemes

et al. 2014

View full text Add to dashboard Cite

BackgroundMonitoring the properties of dissolved organic carbon (DOC) in soil water is frequently used to evaluate changes in soil quality and to explain shifts in freshwater ecosystem functioning.MethodsUsing >700 individual soils (0–15 cm) collected from a 209,331 km2 area we evaluated the relationship between soil classification (7 major soil types) or vegetation cover (8 dominant classes, e.g. cropland, grassland, forest) and the absorbance properties (254 and 400 nm), DOC quantity and quality (SUVA, total soluble phenolics) of soil water.ResultsOverall, a good correlation (r 2 = 0.58) was apparent between soil water absorbance and DOC concentration across the diverse range of soil types tested. In contrast, both DOC and the absorbance properties of soil water provided a poor predictor of SUVA or soluble phenolics which we used as a measure of humic substance concentration. Significant overlap in the measured ranges for UV absorbance, DOC, phenolic content and especially SUVA of soil water were apparent between the 8 vegetation and 7 soil classes. A number of significant differences, however, were apparent within these populations with total soluble phenolics giving the greatest statistical separation between both soil and vegetation groups.ConclusionsWe conclude that the quality of DOC rather than its quantity provides a more useful measure of soil quality in large scale surveys.

show abstract

Section: Discussionmentioning

confidence: 78%

“…This is particularly relevant as DOC in itself can be used to predict the movement of both organic and inorganic pollutants in soil and is often seen as a pollutant itself when entering freshwaters [9], [29]–[30]. Disappointingly, however, we found that all soil and vegetation types had a wide variability in their DOC concentrations.…”

Section: Discussionmentioning

confidence: 79%

Evaluation of Dissolved Organic Carbon as a Soil Quality Indicator in National Monitoring Schemes

et al. 2014

View full text Add to dashboard Cite

show abstract

“…As a preliminary investigation, a pH of 8.0 was selected for the chlorination study in order to examine the organohalogen formation in bacteria containing surface waters such as river water, reservoirs, estuaries, and sea water, which commonly have a neutral or slightly alkaline pH range from 7 to 9. In addition, chlorination at pH = 8 has been tested for various sources of organic matter (e.g., Diaz et al, 2008;Zhang et al, 2009;Chow et al, 2011). The same reaction conditions were selected such that the reactivity of bacterial C in forming halocarbon could be compared to previous studies.…”

Section: Methodsmentioning

confidence: 99%

Technical Note: Reactivity of C1 and C2 organohalogens formation – from plant litter to bacteria

Wang

Zhang

et al. 2012

Biogeosciences

View full text Add to dashboard Cite

Abstract. C1/C2 organohalogens (organohalogens with one or two carbon atoms) can have significant environmental toxicity and ecological impact, such as carcinogenesis, ozone depletion and global warming. Natural halogenation processes have been identified for a wide range of natural organic matter, including soils, plant and animal debris, algae, and fungi. Yet, few have considered these organohalogens generated from the ubiquitous bacteria, one of the largest biomass pools on earth. Here, we report and confirm the formation of chloroform (CHCl 3 ) dichloro-acetonitrile (CHCl 2 CN), chloral hydrate (CCl 3 CH(OH) 2 ) and their brominated analogues by direct halogenation of seven strains of common bacteria and nine cellular monomers. Comparing different major C stocks during litter decomposition stages in terrestrial ecosystems, from plant litter, decomposed litter, to bacteria, we found increasing reactivity for nitrogenous organohalogen yield with decreasing C/N ratio. Our results raise the possibility that natural halogenation of bacteria represents a significant and overlooked contribution to global organohalogen burdens. As bacteria are decomposers that alter the C quality by transforming organic matter pools from high to low C/N ratio and constitute a large organic N pool, the bacterial activity is expected to affect the C, N, and halogen cycling through natural halogenation reactions.

show abstract

“…Trihalomethanes (THMs) DBPs Zhang et al, 2009a;2009b;Panyapinyopol et al, 2005) were regulated by EPA (1979).…”

Section: Introductionmentioning

confidence: 99%

Disinfection and DBPs removal in drinking water treatment: A perspective for a green technology

Ghernaout

2018

Int. j. adv. appl. sci.

View full text Add to dashboard Cite

The generation, monitoring, and health impacts of disinfection by-products (DBPs) in potable water are problems of worldwide worry. Several nations, besides the World Health Organization, possess regulations and/or guidelines on bearable levels of DBPs in water. Since drinking water is frequently remediated using a chemical killing agent, DBPs are pollutants to which several humans are unprotected. On account of the health impacts linked to subjection to chlorinated water and/or some DBPs, the water manufacturing has performed great endeavors to equilibrate killing pathogens and DBP monitoring. Large survey has been realized on rising DBPs of health and regulatory worry. In spite of the fact that the attention on DBPs was previously on chlorine-and bromine-containing carbonaceous DBPs, appearing DBPs comprise iodine-containing species, also halogenated and non-halogenated nitrogenous DBPs. In addition, latest toxicity experimentation has proposed that certain of the more recent PBPs are of more elevated toxicity than some of the regulated chemical products. Therefore, survey has been realized to better comprehend how to costeffectively monitor a large interval of regulated and appearing DBPs. This comprises the usage of advanced remediation and killing pathogens methodologies. This paper shows certain of the newest research works at comprehending these significant DBP-related problems. Disinfection is killing microorganisms present in water; but, it is as well killing human beings drinking water by poisonous DBPs. Using chemicals for water treatment is finally a lost cause.

show abstract

Trihalomethane, haloacetonitrile, and chloral hydrate formation potentials of organic carbon fractions from sub-tropical forest soils

Cited by 30 publications

References 28 publications

Evaluation of Dissolved Organic Carbon as a Soil Quality Indicator in National Monitoring Schemes

Evaluation of Dissolved Organic Carbon as a Soil Quality Indicator in National Monitoring Schemes

Technical Note: Reactivity of C1 and C2 organohalogens formation – from plant litter to bacteria

Disinfection and DBPs removal in drinking water treatment: A perspective for a green technology

Contact Info

Product

Resources

About