TABLE OF CONTENTS
INTRODUCTION……… 1. ANALYSIS OF THE STATE OF KNOWLEDGE ON REDUCTION OF
METALLURGICAL INDUSTRY IMPACT ON WATER ENVIRONMENT……. 1.1. The impact of sulfur compounds on the environment and human health…………. 1.2. The impact of nitrogen compounds on the environment and human health……… AIM, THESES AND METHODOLOGY……….
8 10 13 15 17 2.AZOVSTAL IRON & STEEL WORKS CHARACTERISTICS………...
2.1.General characteristics……….. 2.2.Water supply and sewage system of AZOVSTAL IRON & STEEL WORKS……….. 3. CHARACTERISTICS OF THE SEA OF AZOV AS THE MAIN RECEIVER OF
INDUSTRIAL WASTEWATER………. 3.1.General characteristics……….. 3.2.Sources and mechanisms of water pollution………. 4. ASSESSMENT OF THE IMPACT OF INDUSTRIAL WASTEWATER ON THE
COASTAL ZONE OF THE SEA OF AZOV……….. 4.1. Assessment of wastewater discharge on sea water quality……….. 4.2.Assessment of the Kalmius River influence on the coastal waters of the Sea of
Azov……….
4.3.Assessment of theimpact of infiltration from slag storage reservoir on the coastal
water of the Sea of Azov………. 4.4. Integral assessment of the state of the Sea of Azov and the Kalmius River………
4.4.1. Methodological approach……….. 4.4.2. Assessment of the content of harmful pollutants according to the principle
of a limiting criterion………... 4.4.3.Classification of sea and river water quality……….. CONCLUSIONS TO CHAPTERS 1–4... 5. SUBSTANTIATION OF EXPERIMENTAL RESEARCH………..
5.1. Analysis of the existing treatment methods of wastewater from metallurgical industry………...
5. 1. 1.Methods of sulfur compounds removal………..
5. 1. 2. Methods of nitrogen compounds removal……….. 5.2. Analysis of the state of industrial waste dumps and possibilities of their
elimination……….. CONCLUSIONS TO CHAPTER 5……… 6. ELABORATION OF TECHNOLOGY FOR SULFIDES AND AMMONIA
REMOVAL FROM SLAG INFILTRATE ………... 6.1. Methodology of experimental researches ………..
6.1.1. Methods for sulfides determination ………. 6.1.2. Methods for ammonia determination………... 6.1.3. Results of chemical analysis………. 6.2. Investigations of sulfides removal kinetics ………
21 21 22 28 28 32 52 53 56 59 60 60 63 65 71 73 73 78 80 83 88 89 89 89 93 95 97
6.2.1 Method of oxidation by air oxygen……… 6.2.2 Sorption method with Mg / (Mg + Al) layered double hydroxides………... 6.2.3 Precipitation method considering the recycling of industrial wastes……… 6.2.4. Biological method... 6.3. Ammonia removal kinetics investigations……….
6.3.1. Method of changing temperature conditions………....
6.3.2. Method of changing alkalinity medium………...
CONCLUSIONS TO CHAPTER 6……… 97 105 114 120 123 123 125 133 7. ELABORATION OF TECHNOLOGICAL SOLUTION FOR REDUCTION OF
AZOVSTAL IRON & STEEL WORKS OF NEGATIVE IMPACT ………..
7. 1. Technological scheme for the removal of sulfides and ammonia from the slag infiltrate ……… 7.2. Elaboration of the alternative slag quenching method……… 7.3. Cost-effectiveness of the implementation of the technological solutions and the
calculation of prevented economic damage………. CONCLUSIONS TO CHAPTER 7……… 134 134 145 149 154 GENERAL CONCLUSIONS……….. 156 REFERENCES……… LIST OF FIGURES……… LIST OF TABLES……….. LIST OF APPENDIXES……… APPENDIXES……… 159 182 185 187 188
