Short-chain chlorinated paraffins (SCCPs) are a {complex|complicated} mixture of polychlorinated alkanes (C10-C13, chlorine {content|content material} 40-70%), and {have been|happen to be|have already been} categorized as persistent organic pollutants. {However|Nevertheless|Nonetheless|Even so|On the other hand|Having said that}, {there are|you will find|you’ll find|you can find|you will discover|there are actually} {knowledge|understanding|information|expertise|know-how} gaps about their environmental degradation, {particularly|especially|specifically} the effectiveness and mechanism of photochemical degradation in surface waters. Photochemically-produced hydrated electrons (e-(aq)) {have been|happen to be|have already been} shown to degrade {highly|extremely|very|hugely} chlorinated compounds in environmentally-relevant {conditions|circumstances|situations} {more|much more|a lot more|far more|additional|extra} {effectively|successfully|efficiently|properly|proficiently|correctly} than hydroxyl radicals (·OH), which can degrade a wide {range of|selection of|array of} organic pollutants. This study aimed to evaluate the {potential|possible|prospective} for e-(aq) and ·OH to degrade SCCPs. To this {end|finish}, the degradation of SCCP model compounds was investigated {under|below|beneath} laboratory {conditions|circumstances|situations} that photochemically {produced|created|made|developed} e-(aq) or ·OH. Resulting SCCP degradation {rate|price} constants for e-(aq) {were|had been|have been} {on the|around the} {same|exact same|identical|very same|similar} order of magnitude as well-known chlorinated pesticides. Experiments {in the|within the|inside the} presence of ·OH yielded {similar|comparable|equivalent|related} or {higher|greater|larger} second-order {rate|price} constants. Trends in e-(aq) and ·OH SCCP model compounds degradation {rate|price} constants {of the|from the|in the|on the|with the|of your} investigated SCCPs {were|had been|have been} {consistent|constant} with that of other chlorinated compounds, with {higher|greater|larger} chlorine {content|content material} {producing|creating|generating|making} in {higher|greater|larger} {rate|price} constants for e-(aq) and {lower|reduce|reduced|decrease} for ·OH. Above a chlorine:carbon ratio of {approximately|roughly|around|about} 0.{6|six}, the e-(aq) second-order {rate|price} constants {were|had been|have been} {higher|greater|larger} than {rate|price} constants for ·OH reactions. {Results|Outcomes|Final results|Benefits} of this study {furthermore|moreover|in addition|additionally} {suggest|recommend} that SCCPs are {likely|most likely|probably} susceptible to photochemical degradation in sunlit surface waters, facilitated by dissolved organic matter {that can|that may|that will|that could|which will|which can} {produce|create|generate|make} e-(aq) and ·OH when irradiated. Price of 131180-63-7 92220-65-0 Purity PMID:24275718
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