DSpace Collection:http://hdl.handle.net/123456789/4182024-03-29T11:08:17Z2024-03-29T11:08:17ZTertiary Treatment: Microalgae-based Wastewater TreatmentTiron, OlgaManea, Elena ElisabetaBumbac, Costelhttp://hdl.handle.net/123456789/18642022-08-12T06:20:26Z2021-01-01T00:00:00ZTitle: Tertiary Treatment: Microalgae-based Wastewater Treatment
Authors: Tiron, Olga; Manea, Elena Elisabeta; Bumbac, Costel
Description: The Potential of Microalgae Biotechnology, 2021, 222-255, DOI: 10.1561/9781680837810.ch62021-01-01T00:00:00ZSpatio-temporal evolution of sediments pollution with mobile heavy metals in an abandoned mining area from RomaniaKim, LidiaVasile, GabrielaPascu, Luoana FlorentinaStanescu, BogdanAnghelache, Alina MariaBatrinescu, GheorgheCristea, Ionuthttp://hdl.handle.net/123456789/11552020-10-22T08:47:30Z2018-01-01T00:00:00ZTitle: Spatio-temporal evolution of sediments pollution with mobile heavy metals in an abandoned mining area from Romania
Authors: Kim, Lidia; Vasile, Gabriela; Pascu, Luoana Florentina; Stanescu, Bogdan; Anghelache, Alina Maria; Batrinescu, Gheorghe; Cristea, Ionut
Abstract: The present chapter focuses on spatio-temporal evolution of sediments pollution with mobile heavy metals in ive sampling campaigns, in an abandoned gold-bearing mining area from Certeju de Jos, Hunedoara County. The investigated zone is situated in a region where for a long period intense activities of mining exploitation was conducted. For determination of total metals content, sediment samples were dissolved with ultra- pure nitric acid to microwave digestion. For the determination of mobile metals concentrations, it used the first step of BCR 701 sequential extraction scheme in a modified form, by reducing the extraction time from 16 hours to 20 minutes by sonication. The total and mobile concentrations of metals were determined by using ICP-MS. The concentrations of the mobile fractions of Cd, As and Cu are between 60 and 98% for Cd, 10 and 38% for As and up to 44% for Cu, indicating their presence in a bioavailable form. Due to the high mobility, these metals can pass from sediment to surface water and, implicitly, to the aquatic ecosystems. The pollution indices, calculated for the total content of As, Cd, Cu, Ni and Pb, indicate the presence of a strong environmental risk of sediment degradation in most investigated site.
Description: Sedimentation Engineering, chapter 9, 2018, pag. 149-171, IntechOpen2018-01-01T00:00:00ZStatistical indicators regarding dangerous chemical substances according to requirement of REACH RegulationCruceru, LilianaGrigore, Dan CatalinBrinzoi, Constantinhttp://hdl.handle.net/123456789/7282021-06-28T09:44:35Z2010-01-01T00:00:00ZTitle: Statistical indicators regarding dangerous chemical substances according to requirement of REACH Regulation
Authors: Cruceru, Liliana; Grigore, Dan Catalin; Brinzoi, Constantin
Abstract: Indicatorii de risc chimic calculaţi au evidenţiat riscul diferenţiat pe care substanţele chimice îl pot induce asupra lucrătorilor, consumatorilor sau mediului funcţie de proprietăţile lor fizico-chimice, de valorile expunerii şi ale toxicităţii corelate cu volumul de producţie şi numărul de utilizări pentru fiecare dintre substanţele evaluate.
Indicatorul de producţie evidenţiază faptul că la nivel naţional este predominantă producţia de substanţe chimice cu nivel mediu până la foarte redus de toxicitate, chiar dacă pe perioada analizată există variaţii cantitative de la an la an. Se remarcă scăderea producţiei de substanţe chimice care prezintă nivel ridicat de toxicitate pentru mediu în anii 2007, 2008.
Indicatorul consum aparent de substanţe chimice şi periculoase indică valori ale consum aparent situat sub valorile de producţie, pe tot intervalul analizat dar cu variaţii periodice funcţie de variaţiile înregistrate de producţie. Aceasta indică faptul că la nivelul României exporturile de substanţe chimice ocupă un loc important.
Valorile Indicatorului de transport transfrontalier evidenţiază menţinerea aproximativ constantă a volumului de substanţe chimice şi periculoase transportate peste graniţe pe toată perioada de timp analizată şi la nivelul tuturor substanţelor chimice selectate, indiferent de nivelul lor de periculozitate. Aceasta constanţă a volumului de substanţe transportate transfrontalier indică o echilibrare a nivelului importurilor şi exporturilor intra şi extra comunitare funcţie de nivelul producţiei, cu valori mai mari ale importurilor în anii cu producţie mai scăzută sau cu posibilităţi mai mari de export în anii cu nivel mai ridicat al producţiei de chimicale.
Din analiza Indicatorului de toxicitate efectuată pe clase de toxicitate se remarcă diferenţieri pe ani cu o scădere accentuată a indicatorului de toxicitate al substanţelor din clasa F, toxicitate faţă de
mediu, o scădere relativ mică a indicatorului de toxicitate pentru substanţele din clasele de toxicitate A, B, C, D dar şi cu o creştere pentru substanţele din clasa E de toxicitate. Aşa cum era de aşteptat nivelul cel mai ridicat al toxicităţii se regăseşte în rândul substanţelor din clasa A de toxicitate, clasă care include substanţele cancerigene, mutagene, cu efecte asupra reproducerii (CMR).
Pentru toţi indicatorii suplimentari calculaţi s-a efectuat o corelare a rezultatelor obţinute din investigaţia statistică efectuată la nivel naţional cu datele raportate de EUROSTAT la nivelul statelor UE (în anul 2003) constatându-se o bună concordanţă între valorile raportate.
Description: Publication developed in Phare Project "Harmonization of Romanian agricultural and environmental statistics with European norms and standards. Transition Facility 2007/19343.07.01"2010-01-01T00:00:00ZMetals toxic effect in aquatic ecosystems: modulaters of water qualityGheorghe, StefaniaStoica, CatalinaVasile, GabrielaNita-Lazar, MihaiStanescu, ElenaLucaciu, Irinahttp://hdl.handle.net/123456789/4722020-09-18T14:48:31Z2017-01-01T00:00:00ZTitle: Metals toxic effect in aquatic ecosystems: modulaters of water quality
Authors: Gheorghe, Stefania; Stoica, Catalina; Vasile, Gabriela; Nita-Lazar, Mihai; Stanescu, Elena; Lucaciu, Irina
Abstract: The topic of this work was based on the assessment of aquatic systems quality related
to the persistent metal pollution. The use of aquatic organisms as bioindicators of metal
pollution allowed the obtaining of valuable information about the acute and chronic
toxicity on common Romanian aquatic species and the estimation of the environment
quality. Laboratory toxicity results showed that Cd, As, Cu, Zn, Pb, Ni, Zr, and Ti have
toxic to very toxic effcts on Cyprinus carpio, and this observation could raise concerns
because of its importance as a fihery resource. The benthic invertebrates’ analysis
showed that bioaccumulation level depends on species, type of metals, and sampling
sites. The metal analysis from the shells of three mollusk species showed that the metals
involved in the metabolic processes (Fe, Mn, Zn, Cu, and Mg) were more accumulated
than the toxic ones (Pb, Cd). The bioaccumulation factors of metals in benthic inverte‐
brates were subunitary, which indicated a slow bioaccumulation process in the studied
aquatic ecosystems. The preliminary aquatic risk assessment of Ni, Cd, Cr, Cu, Pb, As,
and Zn on C. carpio revealed insignifiant to moderate risk considering the measured
environmental concentrations, acute and long‐term effcts and environmental
compartment.
Description: Water Quality, Chapter 4, pp. 59-89; Hlanganani Tutu (ed)2017-01-01T00:00:00Z