ECOLOGICAL PROBLEMS of Chemistry and Chemical Technology

ELECTROCHEMICAL PURIFICATION OF WASTEWATERS CONTAINING AZOBENZENE

DOI: 10.6060/tcct.20165912.5422
Izv. Vyssh. Uchebn. Zaved. Khim. Khim. Tekhnol. 2016. V. 59. N 12. P. 118-126

2016, Т. 59, № 12, Стр. 118-126

OPTIMIZATION OF ECOLOGICAL AND ECONOMICAL TASKS AT PROCESSING RAW MATERIALS OBTAINED FROM LEWISITE REACTION MASSES ...

DOI: 10.6060/tcct.20165911.5450
Izv. Vyssh. Uchebn. Zaved. Khim. Khim. Tekhnol. 2016. V. 59. N 11. P. 117-123

OPTIMIZATION OF ECOLOGICAL AND ECONOMICAL TASKS AT PROCESSING RAW MATERIALS OBTAINED FROM LEWISITE REACTION MASSES INTO COMMERCIAL ARSENIC OXIDE

The paper presents original technical solutions for processing the raw materials ob-tained from the lewisite detoxication products into arsenic (III) oxide. Our optimization of arsenic (V) compounds removal from the system and sodium chloride purification from im-purities of arsenic compounds allow improving the economical and ecological parameters of the whole process of hydrolyzed sodium arsenite (HSA) conversion into arsenic (III) oxide. Our improvement of certain technological operations has made possible to optimize the gen-eral process scheme.

Key words: processing technologies, hydrolyzed sodium arsenite, arsenic (III) oxide, sodium chloride

REFERENCES

2016, Т. 59, № 11, Стр. 117-123

PHYTOEXTRACTION OF HEAVY METALS FROM OIL CONTAMINATED SOILS OF THE APSHERON PENINSULA

DOI: 
10.6060/tcct.20165910.5430

Izv. Vyssh. Uchebn. Zaved. Khim. Khim. Tekhnol. 2016. V. 59. N 10. P. 95-99

A method for remediation of soils contaminated with oil and heavy metals has been described. It involves phytoextraction of heavy metals from soils by growing on them specifi-cally selected species of higher terrestrial plants. Selection of agricultural plants which are resistant to oil influence and can accumulate a wide range of metals has been implemented.

Key words: oil-contaminated soils, phytoremediation, heavy metals, phytotoxicity

REFERENCES
1. Mustafina E.А., Poletayeva О.Yu., Movsumzade E.М. Heavy metal-bearing oils and their demetallization. Neftegazokhimiya. 2014. N 4. P.15-18 (in Russian).
2. Bogomolov A.I. Sovremenniye metodi issledovaniya neftey. М.: Nedra. 1984. P. 431 (in Russian).
3. Zvyagintsev D.G. Methods of soil microbiology and biochemistry. М.: MGU. 1980. P. 224 (in Russian).
4. Raymond R.L. Developments in Industrial Microbiology. 1961. V. 2. P. 23-32.

2016, Т. 59, № 10, Стр. 95-99

WATER QUALITY IN TRIBUTARIES OF VOLGA RIVER IN WATER AREA OF GORKY WATER-STORAGE BASIN

In article the results of complex study of water quality for tributaries of Volga river in a water area of Gorky water-storage basin. Study methods included both the chemical and biological methods of pollution level control. For all water flows the excess of MPC on heavy metals (by 1-27 times), partially on copper by 1-27, on iron –by 3-9, on manganese by 1-8, as well as on ammonium cations – by 1-6, and difficult-oxidizing organic compounds (COD)-by 2-4 is observed. It was established by the bio-testing method (test-objects are the chlorella algae and Daphnia) that water samples taken in the region of river mouths of Gor-ky water-storage basin (Sunzha, Kazokha, Elnat, Kineshemka) don’t posses acute toxicity but they are slightly toxicity.

Key words: natural water, pollutants, toxicity evaluation, biotesting

REFERENCES
1. Voronin A.V., Kiselev S.P., Rykov S.V. // Vest. RUDN. Ser. Ecologiya and bezopastnost zhiznedeyatelnosti. 2007. N 3. P. 74-77 (in Russian).

2016, Т. 59, № 5, Стр. 89-94
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