<?xml version="1.0" encoding="UTF-8"?><xml><records><record><source-app name="Biblio" version="7.x">Drupal-Biblio</source-app><ref-type>17</ref-type><contributors><authors><author><style face="normal" font="default" size="100%">Kai Zhang</style></author><author><style face="normal" font="default" size="100%">Zhang, Bao-Zhong</style></author><author><style face="normal" font="default" size="100%">Li, Shao-Meng</style></author><author><style face="normal" font="default" size="100%">Zeng, Eddy Y.</style></author></authors></contributors><titles><title><style face="normal" font="default" size="100%">Regional dynamics of persistent organic pollutants (POPs) in the Pearl River Delta, China: Implications and perspectives</style></title><secondary-title><style face="normal" font="default" size="100%">ENVIRONMENTAL POLLUTION</style></secondary-title></titles><dates><year><style  face="normal" font="default" size="100%">2011</style></year><pub-dates><date><style  face="normal" font="default" size="100%">OCT</style></date></pub-dates></dates><number><style face="normal" font="default" size="100%">10</style></number><volume><style face="normal" font="default" size="100%">159</style></volume><pages><style face="normal" font="default" size="100%">2301-2309</style></pages><language><style face="normal" font="default" size="100%">eng</style></language><abstract><style face="normal" font="default" size="100%">The mass transport budgets of 1,1,1-trichloro-2,2-bis(chlorophenyl)ethane (p,p&amp;#039;-DDT) and decabromodiphenyl ether (BDE-209) in the Pearl River Delta, South China were calculated based on previously collected data. Residual p,p&amp;#039;-DDT, mostly related to historical use, has largely settled into soil (780,000 kg), while the soil BDE-209 inventory (44,000 kg) is considerably smaller. Conversely, large amounts of BDE-209 currently used in numerous commercial products have resulted in a much higher atmospheric depositional flux of BDE-209 (28,100 kg/yr) relative to p,p&amp;#039;-DDT (310 kg/yr). The soil inventory of p,p&amp;#039;-DDT is predicted to decrease to half of its current value after 22 years, and the percent area containing soil p,p&amp;#039;-DDT at levels exceeding the effects range medium (27 ng/g) will decrease from 40% to 20%. Finally, soil BDE-209 inventory will reach an equilibrium value of 940 tons in 60 years, when BDE-209 levels in 50% of soil will be above an equivalent risk guideline value (125 ng/g). (C) 2011 Elsevier Ltd. All rights reserved.</style></abstract></record></records></xml>