Environmental destruction answer given by professional and technical personnel: BCR3 state by continuous extraction method and Tessier5 step sequential extraction method for certain heavy metals in the waste board chemical speciation studies. The results show that, BCR sequential extraction of heavy metals in the circuit board for waste extraction rate higher than the Tessier sequential extraction method. Discarded circuit boards Cu, Pb, Zn and Ni various forms of distribution vary widely. BCR and Tessier sequential extraction method results show that PCB waste in the presence of Ni mainly of residue, a small risk of contamination of the environment; while Pb and Zn mainly in acid extractable or exchangeable state and the presence of carbonates in Southern acid rain environment easy dissolution; BCR and Tessier sequential extraction method for the evaluation of the activity is inconsistent Shek Pai gold-plated Cu recovery, but due to the high amount of waste in the Cu circuit boards, the impact on the environment can not be ignored. In order to better deal with these dangerous products, please contact us formal environmental destruction company. E-waste recycling industry great harm, processors can not handle metal wastes will be thrown away; gas recovery generated waste and residues caused serious pollution to the environment. TV, computers, mobile phones and other electronic products, the release of lead, cadmium, mercury, PVC and other large amounts of toxic and hazardous substances in the recovery, once contaminated water into the soil will eventually harm humans, animals and plants. Some can not digest waste plastics and waste solder, were shipped to other parts made of gold-plated recycled Nan children's toys, jewelry, key rings, etc., and then flows back through a number of international wholesale European and American countries. "Wall Street Journal" reported that some in the U.S. discount stores selling leaded toxic jewelry from China. Some analysts believe that it is used in the circuit board made of lead solder. "This is a global toxic cycle." "Wall Street Journal" commented. In fact Changping gilded recovery, China promulgated the "Solid Waste Pollution Prevention Law" in 1996, strict management of solid waste imports. From February 1, 2000, the State Environmental Protection Administration has banned imports of computers, monitors, copiers, microwave ovens, air conditioners, televisions and other waste. Currently, the ban apparently did not obtain significant results. According to the survey, "Universal People" magazine, Guangdong, Zhejiang and other places have become the main distribution center for electronic waste and have to Hunan, Shanghai, Tianjin, Fujian, Shandong and other places tends to spread. Da Xing waste recycling, South gilded recovery, gold recovery recycling scrap materials provided by Da Xing. Search for "scrap metal recycling, waste plastic recycling, e-waste recycling, industrial waste recycling, building" reliable suppliers, network operators choose to have a full alliance Certified: Dongguan City of-waste recycling company (www.dxhphs.com) , honest and reliable, "business alliance customer service" on page now click on live chat with us now!