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Studies regarding the copper ions removal from waste waters [articol]

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dc.contributor.author Negrea, Adina
dc.contributor.author Ciopec, Elvira-Mihaela
dc.contributor.author Lupa, Lavinia Afrodita
dc.contributor.author Muntean, Cornelia
dc.contributor.author Negrea, Petru
dc.date.accessioned 2020-04-30T07:25:18Z
dc.date.accessioned 2021-03-01T08:52:18Z
dc.date.available 2020-04-30T07:25:18Z
dc.date.available 2021-03-01T08:52:18Z
dc.date.issued 2008
dc.identifier.citation Negrea, Adina. Studies regarding the copper ions removal from waste waters. Timişoara: Editura Politehnica, 2008 en_US
dc.identifier.uri http://primo.upt.ro:1701/primo-explore/search?query=any,contains,Studies%20regarding%20the%20copper%20ions%20removal%20from%20waste%20waters&tab=default_tab&search_scope=40TUT&vid=40TUT_V1&lang=ro_RO&offset=0 Link Primo
dc.description.abstract Waste waters resulted from industry usually contain heavy metals salts. During the neutralization process with sodium hydroxide and sodium carbonate these salts are transformed in compounds such as insoluble hydroxides or basic salts. The precipitation process represents one of the most used methods for the removal of heavy metals from waste waters. In the present paper are presented studies on the removal of copper ions from waste waters resulted from industry through precipitation, using 15% NaOH and 20% Na2CO3 solutions as precipitation agents. The studies were carried out on synthetic solutions containing copper in various concentrations (5, 10 and 15 g Cu2+/L). Several aspects of the precipitation process were studied: the dependence of the pH of the reaction mass on the volume of precipitation agent, the evolution of the volume of suspensions in time and the dependence on the pH of the residual concentration of copper ions. The optimum pH value for the removal of cooper ions from the waste waters for both precipitation agents is 7. For all initial copper ions concentrations, pH = 7 assures residual concentrations smaller than the maximum value admitted by the legislation. The copper ions removal using the 20% Na2CO3 solutions was also studied on a pilot installation. Copper residual concentration decreased with installation functioning time; the installation went into constant conditions after ~300 minutes; a constant residual concentration of ~1.1 mg Cu2+/L was reached. en_US
dc.language.iso en en_US
dc.publisher Timişoara: Editura Politehnica en_US
dc.relation.ispartofseries Buletinul ştiinţific al Universităţii „Politehnica” din Timişoara, România. Seria chimie şi ingineria mediului, Tom 53(67), fasc. 1-2 (2008), p. 93-97
dc.subject Protecţia mediului en_US
dc.subject Ape uzate en_US
dc.subject Articol en_US
dc.subject Waste water en_US
dc.subject Copper removal en_US
dc.subject Precipitation method en_US
dc.title Studies regarding the copper ions removal from waste waters [articol] en_US
dc.type Article en_US

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