Da Xing waste recycling, gold recycling company, gilded Recycling scrap materials provided by Da Xing. We are Dongguan City of scrap material recycling companies (www.dxhphs.com) located at: Dongguan specializes in: scrap metal recycling, waste plastic recycling, e-waste recycling, industrial waste recycling, environmental destruction of the building professional and technical personnel to give answers : By BCR3 state 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 evaluating the activity of Cu inconsistent, 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. Electroplating enterprises in the wastewater treatment process will produce sludge, due to the plating process, plating types, different wastewater treatment processes vary, sludge composition is more complex. Dongguan gilded mishandling electroplating sludge recycling, it will seriously pollute the environment. Meanwhile electroplating sludge containing metals can be recycled, such as copper, nickel, chromium, iron, and zinc. The content of heavy metals in the sludge is much higher than some of these heavy metals in the ore content of gilded recycling company, has a high value in use. Even less electroplating sludge metal content can also be enriched. Recycling at home and abroad using different methods zinc, chromium, copper and nickel and other metals. According to the electroplating wastewater treatment gilded high recovery of different ways, can be divided into sub-quality electroplating sludge mixed sludge and sludge into two categories: the former is the different kinds of electroplating wastewater treated separately formed sludge, such as those containing chromium sludge, copper sludge, sludge containing nickel and gold-plated zinc sludge recycling, quality of sludge in electroplating wastewater treatment process can extract metals, reduce sludge production; latter is the different types of plating electroplating wastewater treatment sludge were mixed together formed. Depending on electroplating wastewater treatment process or condition, chromium electroplating sludge is divided into non-chromium sludge and sludge two kinds: the former things, in addition to chromium iron, zinc hydroxide, nickel and copper and other metals.