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Environmental loads from water‐sprinkled softwood timber. 1. Characteristics of an open and a recycling watering system
Author(s) -
Borga Peter,
Elowson Torbjörn,
Liukko K. Ari
Publication year - 1996
Publication title -
environmental toxicology and chemistry
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.1
H-Index - 171
eISSN - 1552-8618
pISSN - 0730-7268
DOI - 10.1002/etc.5620150606
Subject(s) - chemistry , nitrate , softwood , environmental chemistry , sulfate , nutrient , organic matter , sulfur , phosphorus , wastewater , total organic carbon , pulp and paper industry , environmental science , environmental engineering , organic chemistry , engineering
The concentrations of a number of organic and inorganic compounds in the wastewater from sprinkling of landstored softwood timber was monitored during a period of up to 18 weeks. A recycling system using a watering intensity of 160 mm/24 h, and an open system with intensities between 55 to 12 mm/24 h were studied. The compound classes investigated included dissolved organic carbon; distillable phenols; resin acids; bacterial phospholipid fatty acids (PLFA); organic and inorganic phosphorus, sulfur, and nitrogen; and a number of metal ions. In the recycling system, the peak concentrations occurred after 4 to 6 weeks, and the amounts accumulated through refilling of water largely exceeded those present in the wastewater at the end of the storage. In the open system, net loads of compounds occurred during the first weeks, which thereafter turned into uptakes for most compounds. The PLFA increased during the first weeks and clearly responded to the peak concentrations in the waters. Already from the start there were strong uptakes of nitrate, sulfate, and many minerals in the piles, suggesting that the supply of macro‐ and micronutrients necessary for microbial growth, as well as available terminal electron acceptors, may be a limiting factor for the extent of microbial degradation performed in the pile.