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(Click for frequent words.) 66 arsenide 63 Sulphur dioxide 62 Volatile Organic Compounds VOCs 62 Fecal coliform 61 carbon monoxide sulfur dioxide 61 SO2 emission 61 total dissolved solids 61 Hydrogen Sulfide H2S 61 dissolved oxygen DO 61 biphenyls 61 tetrachloroethene 60 trichloroethene TCE 60 haloacetic acid 60 pollutants 60 Chromium VI 60 dichloroethene 60 Volatile Organic Compounds 60 dioxins furans 60 sulfur trioxide 59 carbon tetrachloride 59 faecal coliform 59 sulfur dioxide emission 59 haloacetic acids 59 pollutant 59 nitrogen oxide emission 59 Demand BOD 59 Sulphur Dioxide 59 suspended solids 59 nitrogen oxides carbon monoxide 59 fecal coliforms 59 permanganate chemical 59 trichloroethene 59 arsenic selenium 59 barium chromium 59 nitrobenzene 59 HAAs 59 particulate matter PM# 59 trihalomethane 58 inorganic salts 58 nitrates phosphates 58 sulfur dioxide nitrogen dioxide 58 trihalomethanes THMs 58 Total Dissolved Solids 58 ammonia NH3 58 dissolved solids 58 #,# dichloroethane 58 nitric acids 58 tetrachlorethylene 58 #,#,# trichloroethane 58 hydrogen chloride HCl 58 carbon monoxide hydrocarbons 58 Sulfur dioxide 58 Nitrogen oxide 58 Turbidity 58 PCBs polychlorinated biphenyls 58 mercury selenium 58 arsenic benzene 58 nitrate nitrogen 57 biochemical oxygen 57 TTHM 57 TTHMs 57 VOC Volatile Organic Compounds 57 Volatile Organic Compounds VOC 57 naturally occurring radium 57 fecal coliform bacteria 57 microcystins 57 airborne particulates 57 chlorinated solvent 57 Nitrogen dioxide 57 Vinyl chloride 57 Biochemical Oxygen Demand 57 particulate matter sulfur dioxide 57 hydrocarbons carbon monoxide 57 Sulfur dioxide emissions 57 PCBs dioxins 57 faecal coliforms 57 orthophosphate 57 Beijiang 57 g/m3 57 phosphates nitrates 57 radioactive isotope iodine 57 benzopyrene 57 respirable suspended particulates 56 chlorides 56 disinfection byproducts 56 particulate matter soot 56 particulate matter nitrogen oxides 56 Sulfate 56 Biological Oxygen 56 toxaphene 56 polychlorinated biphenyl PCB 56 carbon disulfide 56 chromium VI 56 carcinogenic polycyclic aromatic hydrocarbons 56 trichloroethane 56 industrial degreaser 56 harmful contaminants 56 Dioxane 56 cadmium arsenic 56 benzene toluene 56 ethene 56 Bq l 56 benzene carcinogen 56 polyaromatic hydrocarbons 56 benzene toluene xylene 56 hydrous 56 tetrachloroethene PCE 55 phosphorous fertilizers 55 sulfuric acid mist 55 resorcinol 55 sodium magnesium 55 dichloroethylene 55 diethyl 55 arsenic cadmium chromium 55 arsenic manganese 55 arsenic cadmium mercury 55 Polybrominated 55 benzene ethylbenzene 55 manganese smelter 55 cyclohexane 55 Polychlorinated Biphenyls 55 hydrogen chloride 55 algal toxins 55 groundwater contaminant 55 inorganic contaminants 55 biphenyls PCBs 55 Sodium cyanide 55 neodymium praseodymium 55 atmospheric deposition 55 turbidity 55 suspended solids TSS 55 polychlorinated 55 Hydrogen sulfide 55 Volatile organic compounds 55 vinyl acetate monomer 55 arsenic barium 55 Sodium hydroxide 55 oxidized mercury 55 arsenic chromium 55 TCE trichlorethylene 55 disinfection byproduct 55 effluent discharge 55 soot particulates 55 polybrominated diphenyl ether PBDE 55 pollutant emission 55 Hydrogen Sulfide 55 xylenes 55 demineralised water 55 de nitrification 55 chloride 55 Carbonyl 54 #.#mg l [001] 54 sodium sulfide 54 wastewater effluent 54 diglycol 54 sodium bromide 54 Halogenated 54 THMs 54 butyl acetate 54 coliforms 54 perfluorooctane sulfonate 54 Kuan Yin Taiwan 54 allyl alcohol 54 carcinogenic benzene 54 aquatic toxicity 54 paradichlorobenzene 54 potassium NPK 54 barium chloride 54 ammonium nitrogen 54 effluent discharged 54 perfluorooctane sulfonate PFOS 54 sodium potassium chloride 54 hydrogen sulphide H2S 54 dimethyl sulfide 54 residual chlorine 54 dichloroethane 54 Brackish water 54 pesticide methamidophos 54 Xiangjiang River 54 Nitrogen NOx 54 mg l 54 nitrate concentrations 54 Particulate emissions 54 pollutant discharge 54 dechlorination 54 sulfur dioxide 54 chlordane 54 hexavalent chromium polybrominated biphenyls 54 cited krypton strontium 54 leachates 54 lime slurry 54 #,# butadiene 54 arsenic mercury 54 tailings basin 54 ug l 54 dioxide 54 trimethylamine 54 degreasing agent 54 urea ammonia 54 phosphorous potassium 54 halides 54 contaminants 54 methyl chloroform 54 aromatic hydrocarbons 54 acrolein 54 Fecal Coliform 54 gaseous pollutants 54 nitrous oxide emission 54 disinfectant byproducts 54 cyanides 54 diisocyanate 53 sulfur dioxide SO2 nitrogen 53 suspected carcinogen 53 oxalic acid 53 cyanide arsenic 53 bacterial decomposition 53 hydrogen sulfide 53 Dysprosium Dy 53 biphenyl 53 ammonia 53 inorganic mercury 53 microcystin 53 barium cadmium 53 carbon monoxide particulate matter 53 chlorine byproducts 53 industrial wastewaters 53 Hexavalent chromium 53 ozone particulates 53 sewage effluent 53 ethoxylates 53 hydrofluorocarbons HFCs perfluorocarbons PFCs 53 effluents 53 iso octane 53 bioaerosol 53 pollutants sulfur dioxide 53 arsenic 53 ozone precursor 53 degreasing solvent 53 dioxane 53 Bq kg 53 pollutant ozone 53 chromium nickel 53 dissolved salts 53 Xinqiang River 53 Volatile Organic Compound VOC 53 particulate matter 53 Naphthalene 53 Particulate Matter 53 toxic nitrobenzene 53 toluene benzene 53 manganese chromium 53 enterococcus bacteria 53 soluble salts 53 Particulates 53 naturally occurring arsenic 53 sulfuric acids 53 pentoxide 53 Sodium Cyanide 53 Hydrogen Sulphide 53 carbon monoxide nitrogen oxides 53 inhalable particles 53 nitrous oxides 53 degrease metal parts 53 RSPM 53 contaminents 53 calcium carbonate CaCO3 53 phosphine 53 phosphorus 53 metallic ions 53 carbon monoxide nitrogen dioxide 53 flammable corrosive 53 sulfur dioxide carbon monoxide 53 Nitrogen oxides 53 Hexane 53 polychlorinated biphenyl 53 barium carbonate 53 benzoates 53 activated carbons 53 trichlorethylene 53 ppbv 53 magnesium sodium potassium 53 chlorinated compounds 53 particulate 53 methyl chloride 53 tetrachlorethylene PCE 53 diphenyl ethers 53 furan 53 colorless flammable liquid 53 nitrification 53 fecal coliform 53 respirable 53 Effluents 53 particulate contaminants 53 Microscopic particles 52 sulfur dioxide nitrogen 52 chlorine bromine 52 HBCD 52 glacial acetic acid 52 butyl acrylate 52 heptachlor 52 persistent bio accumulative 52 Concentrations 52 particulate matter PM#.# 52 mercury chromium cadmium 52 Elevated concentrations 52 trichlorethylene TCE 52 Chloramines 52 alkalinity 52 arsenic cadmium copper 52 coated urea SCU 52 soils sediments 52 Methylene Chloride 52 PAH concentrations 52 dioxides 52 Sewage sludge 52 fluorotelomers 52 sulfate concentrations 52 ozone particulate matter 52 polybrominated diphenyl ether 52 benzene arsenic 52 cadmium chromium 52 carcinogen dioxin 52 Volatile Organic Compound 52 disinfection byproducts DBPs 52 sulfer 52 formaldehyde benzene 52 nitrogenous compounds 52 desulfurization gypsum 52 Lanthanum La 52 ethyl acrylate 52 sulphate 52 nitrogenous 52 boron trifluoride 52 manganese carbonate 52 Polycyclic aromatic hydrocarbons 52 Elevated mercury 52 inorganic ions 52 nitrogen oxide NOX 52 dioxin concentrations 52 #ppb [003] 52 chlorine residual 52 fine particulates 52 total coliforms 52 formaldehyde carcinogen 52 PM#s 52 NTUs 52 potassium perchlorate 52 perfluorochemicals PFCs 52 carcinogen benzene 52 Trichloroethylene TCE 52 pollutant particles 52 iron manganese 52 chlorinated hydrocarbons 52 Chlorinated 52 DuPont DeLisle plant 52 Sulfuric acid 52 Phenol 52 Nitric acid 52 organophosphorus pesticides 52 Dimethyl 52 Enterococcus bacteria 52 ethylene dichloride EDC 52 Chlorine dioxide 52 Nitrates 52 metal degreasing 52 Carbon dioxide CO2 52 gases vapors 52 Treated wastewater 52 contaminant concentrations 52 methyl ethyl ketone 52 deicing fluids propylene glycol 52 vinyl chloride 52 mercury arsenic 52 particulate matter emitted 52 City Jinmao Daily 52 calcium oxide 52 crystalline silica 52 chlorine disinfectant 52 persistent bioaccumulative 52 Methane CH4 52 Elevated arsenic 52 Ammonia NH3 52 carcinogenic byproducts 52 ethyl acetate 52 Dongting 52 silica alumina 52 para dichlorobenzene 52 hydroxides 52 colon bacillus 52 harmful byproducts 52 polychlorinated biphenyls PCBs 52 methyl mercaptan 52 Manchhar 52 Sulfur compounds 52 pentachlorophenol 52 benzo pyrene 52 Trichloroethylene 52 Ketones 52 chloride salts 52 Terbium 52 chromium polybrominated biphenyl PBB 52 pollutant discharges 52 pCi l 52 colorless flammable 52 zero valent 52 fecal chloroform 52 cyclohexanone 52 sulfur 52 NOx emission 52 phosphide 51 inorganic substances 51 tetrahydrofuran 51 adipic acid 51 mercury sulfur dioxide 51 picocurie 51 toluene diisocyanate 51 mg/Nm3 51 fine particulate pollution 51 Nitrogen Oxides 51 Hazardous substances 51 organophosphate pesticide 51 polybrominated 51 phosphorous nitrogen 51 VOC emissions 51 hydrogen sulfide ammonia 51 polynuclear aromatic hydrocarbons 51 barium arsenic 51 Huaihe 51 silicon tetrafluoride 51 solvent toluene 51 hexachlorobenzene 51 zinc orthophosphate 51 chromium 51 calcium bicarbonate 51 flocculants 51 Elemental mercury 51 hexachlorobenzene HCB 51 fecal coliform contamination 51 extractables 51 phenols 51 Sulfates 51 perfluorinated compounds 51 Nitrogen Oxides NOx 51 ug L 51 chlorate 51 lead cadmium arsenic 51 Contaminant 51 Coliform 51 respirable suspended particulate matter 51 Dechlorane Plus 51 mercury concentrations 51 chromium chloride 51 dissolved oxygen pH 51 Residues 51 Coliform bacteria 51 oxidizing agent 51 PAHs polycyclic aromatic hydrocarbons 51 particle concentrations 51 humic acids 51 calcium sulphate 51 nitrogen dioxide carbon monoxide 51 methylene diphenyl diisocyanate MDI 51 cadmium selenium 51 carcinogenic dioxins 51 benzene nitrobenzene 51 phosphorous 51 airborne pollutant 51 nondetectable 51 lanthanum neodymium 51 DDT dieldrin 51 VOCs Volatile Organic Compounds 51 Pollutants 51 insolubles 51 perfluorooctane 51 NO3 N 51 μS cm 51 Bromate 51 ultraviolet disinfection 51 chromium manganese 51 trihalomethanes 51 phosphoric acids 51 sulfate 51 VOC volatile 51 wastewater effluents 51 naturally occurring fluoride 51 ferric chloride 51 Beijiang River 51 CaCO3 51 ecotoxicity 51 nitric oxides 51 dioxin TCDD 51 chlorinated solvents 51 aromatic amines 51 particulates 51 industrial effluents 51 emit sulfur dioxide 51 Propionate 51 nonpoint source 51 effluent discharges 51 cordierite 51 isotopic ratios 51 H#SO# 51 sulfur dioxide SO2 emissions 51 ozone pollutant 51 zinc sulfide 51 Total Suspended Solids 51 Shihmen Reservoir 51 sulphite 51 nitrogen NOx 51 organochlorine pesticides 51 Nitrogen Oxide 51 Particulate 51 EtO 51 pyrene 51 VOCs volatile organic compounds 51 Domoic acid neurotoxin 51 nitrates 51 LLRW 51 potassium carbonate 51 Polychlorinated biphenyls PCBs 51 bioaerosols 51 Hydrogen sulphide 51 benzenes 51 Diethyl 51 Sulfuric 51 PCBs DDT 51 methyl mercury 51 Trihalomethanes 51 manure slurry 51 arsenic antimony mercury 51 SO2 51 sulfuric 51 particulate pollutants 51 nitrogen phosphorous 51 effluent 51 nitrogen NOx emissions 51 Lake Taihu 51 enterococci bacteria 51 para xylene 50 Fecal bacteria 50 Yangzi Petrochemical 50 volatile organic compounds 50 PM# particles 50 calcium phosphorous 50 discharging untreated 50 SO2 emissions 50 lanthanum oxide 50 inorganic nitrogen 50 Polychlorinated biphenyls 50 chromic acid 50 contaminant 50 polychlorinated PCBs 50 mercury emitted 50 cerium Ce 50 sulfur dioxide pollutant 50 Sulfur Dioxide 50 chromium cadmium 50 #ppm [002] 50 hexavalent chromium 50 Zijinshan Copper Mine 50 drywall emits 50 tantalum Ta 50 docosahexaenoic 50 phthalate DEHP 50 Ethylene oxide 50 Fecal coliform bacteria 50 ozone O3 50 triclocarban 50 ozone nitrogen oxides 50 methyl isobutyl ketone 50 toluene xylene 50 glycol ethers 50 mixed xylenes 50 Athabasca watershed 50 aluminum dross 50 nitrous oxide N2O 50 discharger 50 SO2 sulfur dioxide 50 #,# dichlorobenzene 50 hydrocyanic acid 50 methylamines 50 Carbon Dioxide CO2 50 sulfur dioxide particulates 50 phthalate metabolites 50 selenium 50 particulate emission 50 Barium 50 harmful gasses 50 hydrofluoric acids 50 Inorganic arsenic 50 carbon monoxide nitrogen oxide 50 magnesium hydroxide 50 toxic hydrogen sulfide 50 efficiency particulate 50 Xylene 50 aluminum gallium indium 50 chloromethane 50 benzoic acid 50 polyester resins alkyd resins 50 phosphorus discharges 50 manganese 50 nitrogen oxides particulate matter 50 indium gallium 50 dysprosium oxide 50 antimony trioxide 50 Leachate 50 airborne particulate matter 50 respirable particles 50 Respirable Suspended Particulate Matter 50 coarse particulate matter 50 carbonyls 50 dissolved oxygen levels 50 ethyl benzene 50 beryllium dust 50 bromine compounds 50 crystalline silica dust 50 radioactive isotope cesium 50 chlorine residuals 50 Oxides 50 unlined landfill 50 household detergents 50 pentane 50 cadmium mercury hexavalent 50 Acrylate 50 μg/m3 50 DeNOx 50 erucic acid 50 sludge digestion 50 ferric oxide 50 vinyl chloride monomer 50 carboxylic acids 50 barium sulfate 50 planktonic algae 50 Contaminants 50 ppb 50 magnesium Mg 50 polychlorinated biphenyls PCB 50 ozone nitrogen dioxide 50 Terbium Tb 50 bioaccumulative 50 chlorinated hydrocarbon 50 sulfur dioxide SO2 50 DBPs 50 CaO 50 elemental phosphorus 50 Ethylene glycol 50 nanopowders 50 mercury cadmium 50 phosphorus concentrations 50 corrosive flammable 50 Hexavalent Chromium 50 wastewater discharge 50 phosphate ester 50 acid PFOA 50 Maximum Contaminant Levels 50 pyrogenic silica 50 acidity pH 50 formate 50 Yingde 50 zinc selenide 50 toxic effluents 50 fecal indicator 50 uranium ores 50 nitrogen oxides NOx emissions 50 dichloride 50 ethylene dibromide 50 mercury Hg 50 dechlorinated 50 stormwater discharges 50 Potassium hydroxide 50 Sodium hypochlorite 50 sooty particles 50 coli bacteria 50 Fine particulate 50 Enterococci 50 dioxins 50 carbondioxide 50 inorganic arsenic 50 aluminum phosphide 50 acrylic esters 50 particulate matter SPM 50 hydrochloric acid HCl 50 chemical #,# butanediol 50 Nitrate 50 furans 50 potassium sulfate 50 radioactive radium 50 e coli bacteria 50 zinc sulphide 50 Guanting 50 dieldrin 50 maximum contaminant 50 polyvinyl chloride resins 50 Calcium carbonate 50 monoterpenes 50 phosphine gas 50 n butyl 50 ferric sulphate 50 Liaohe River 50 TCE PCE 50 perfluorooctanoic acid PFOA 50 N2O emissions 50 poly aromatic hydrocarbons 50 fluorochemicals 50 neodymium Nd 50 potassium sulphate 49 bicarbonate ions 49 groundwater withdrawals 49 ferrochromium 49 calcined kaolin 49 unburned hydrocarbons carbon monoxide 49 impurities contaminants 49 BDEs 49 combustion byproducts 49 toxic hydrogen sulphide 49 phosphorus pollution 49 Magnesium Oxide 49 inorganic compounds 49 Particulate Matter PM 49 polyether polyols 49 polyphosphates 49 Mercaptan 49 mercury dioxins 49 ammonia methanol 49 hydroxyl radical 49 tributyl tin 49 toxic dioxins 49 manganese molybdenum 49 xylene 49 Acrylic acid 49 naturally occurring radioactivity 49 silicon tetrachloride 49 mg/m3 49 trivalent chromium 49 Enterococci bacteria 49 paraffins 49 microfiltration reverse osmosis 49 perfluorocarbons 49 Poyang 49 pollutant loadings 49 weathered kimberlite 49 methamidophos 49 Nitrogen Dioxide 49 yttrium Y 49 nitric 49 toxic polychlorinated biphenyls 49 Ferric 49 lithium oxide 49 nitrogen dioxide NO2 49 pollutants emitted 49 PCBs pesticides 49 #mg/kg [001] 49 radon concentrations 49 trichloramine 49 flux residues 49 aromatic amine 49 Ozone Depleting 49 sulfur hexafluoride SF6 49 ultrafiltration membrane 49 Polycyclic Aromatic Hydrocarbons 49 Nanofiltration 49 carcinogenic chemical 49 inorganics 49 yttrium oxide 49 spokeswoman Tressa Tillman 49 cyanazine 49 odorous gases 49 pollution 49 chlorine atoms 49 Taihu Lake 49 pH alkalinity 49 carbon monoxide hydrogen sulfide 49 calcium fluoride 49 Phosphoric acid 49 Caesium 49 Bromine 49 boiler flue 49 hydrochloric acids 49 corrodes pipes 49 diethyl ether 49 manure decomposes 49 barium strontium 49 magnesium calcium 49 picogram 49 sodium hydrochloride 49 sulfide minerals 49 sorbic acid 49 Air Pollutants 49 Shanghang county 49 oxide nanoparticles 49 Zijinshan mine 49 methylene chloride 49 Nitrogen oxide emissions 49 sulfuric dioxide 49 arsenic concentrations 49 potassium salts 49 perfluorinated chemicals 49 hydrocarbons nitrogen oxides 49 pyroxene 49 VOC abatement 49 faecal coliform bacteria 49 nitrogen oxide sulfur dioxide 49 oxidising 49 graphitic carbon 49 turbidity cloudiness 49 polycyclic aromatic hydrocarbons PAH 49 livestock manure 49 patulin 49 load TMDL 49 soot particles 49 Kcal kg 49 polychlorinated vinyls 49 heptane 49 tropospheric ozone 49 phosphorus magnesium 49 chloride concentrations 49 methyl tert butyl ether 49 Jianxin Coal Mine 49 outgas 49 praseodymium 49 caustic soda sodium hydroxide 49 sulfur oxides nitrogen oxides 49 total coliform 49 nitrogen oxide NOx emissions 49 subsurface soils 49 silt laden 49 propylene ethylene 49 raw untreated sewage 49 enterococcus 49 dioxin PCBs 49 #.#mg L [001] 49 Zeolite 49 lepidolite 49 PM# [003] 49 sorbate 49 chemicals 49 sodium sulphate 49 hydrocarbon vapors 49 Coliforms 49 ammonium chloride 49 hexafluoride 49 #,# propanediol PDO 49 picocuries 49 PCBs mercury 49 particulate opacity mercury 49 pathfinder element 49 Zero Liquid Discharge 49 decaying vegetation 49 ammonia hydrogen sulfide 49 sealants paints 49 aniline 49 cadmium mercury 49 Phenols 49 arsenic boron 49 trihalomethane levels 49 toxic pollutants 49 estrogenic compounds 49 wastewater discharges 49 NOx nitrogen oxide 49 chlorinated pesticides 49 oxide sulfur hexafluoride 49 dewpoint temperature 49 Sulfur Dioxide SO2 49 Untreated wastewater 49 Cohansey aquifer 49 bioaccumulates 49 carcinogenic PCBs 49 Clean Streams Law 49 sodium hydrosulfite 49 regenerable 49 deoxynivalenol 49 carcinogenic pollutants 49 Freshwater mussels 49 Microcystis 49 Tailpipe emissions 49 portland cement 49 Astaris LLC 49 biofiltration 49 propionic acid 49 organophosphate insecticide 49 particulate matter emissions 49 hazardous solvents 49 element boron 49 kt yr 49 aeration basin 49 Mosoni Danube 49 Carbon tetrachloride 49 ultrahigh purity 49 Nitric Acid 49 irritate airways 49 cellulose hemicellulose 49 coarse particles 49 noxious gases 49 manganese zinc 49 calcium carbonates 49 remote blackwater streams 49 PM# particulate matter 49 fluorotelomer 49 silts 49 Three Gorges Reservoir 49 polycyclic aromatic 48 Contaminated groundwater 48 hydrocarbons HC 48 naturally occurring mineral 48 tetroxide 48 industrial solvent trichlorethylene 48 Chlorpyrifos 48 nitrogen trifluoride 48 Tellurium 48 mercaptans 48 pollutant concentrations 48 Ammonium 48 aromatic hydrocarbon 48 carbon ferro manganese 48 flocculant 48 hydrogen sulphide 48 nitrate nitrite 48 RfD 48 spewed benzene 48 harmful vapors 48 coliform 48 benzene 48 Sulphuric acid 48 microscopic airborne particles 48 bequerels 48 Tetrachloroethylene 48 thiourea 48 Methylmercury 48 epoxides 48 organic carbons 48 ammonium salt 48 Chlordane 48 DDT PCBs 48 Soil pH 48 Shaoguan smelter 48 elemental sulfur 48 MWNT 48 antibiotic residues 48 persulfate 48 ferrous sulphate 48 hydrazine hydrate 48 sulfur dioxide pollution 48 NOX emissions 48 digester tanks 48 plasticisers 48 Sulfides 48 Ozone depleting 48 nonylphenol ethoxylates 48 Thi Vai River 48 scfm 48 Calcium magnesium 48 iron calcium magnesium 48 potassium permanganate 48 Bentonite clay 48 solvent vapors 48 Acetic Acid 48 isotope fractionation 48 benzene toluene ethylbenzene 48 toxins 48 carbon dioxide CO ² 48 Methylene chloride 48 hydroxyethyl cellulose 48 airborne particulate 48 Shihmen Dam 48 monoammonium phosphate MAP 48 elements HREE 48 hormone disrupter 48 organotin 48 VOC emission 48 polypropylene compounds 48 chlorine ammonia 48 mirex 48 phosphogypsum stacks 48 Benzo pyrene 48 calprotectin 48 Fluorine 48 Synthetic fertilizers 48 Nitrogen Oxide NOx 48 Chaohu Lake 48 Calcium Carbonate 48 organo 48 cadmium Cd 48 polybutadiene 48 germanium antimony 48 epichlorohydrin 48 bismuth Bi 48 nutrient discharges 48 VOC volatile organic 48 drainfields 48 gangue 48 Adequate ventilation 48 sodium potassium calcium 48 Potassium bromate 48 mercury chromium 48 fluorinated chemicals 48 sulfur fumes 48 Skippack Creek 48 ferrous chloride 48 sulphates