OK, I've had a chance to read pretty much the entire paper.
Some things I noted:
1) In Sweden, 2.1 g/person per day phosphorus is added to raw sewage, of which .45g/person/day is from phosphorus based household products. Full use of phosphated laundry detergents were estimated to incraase the phosphorus load to 2.5 g/person/day - a 16% increase. However, due to use of existing phosphorus based household products, total non-urine and non-feces phosphorus would be 34%. The exact types of existing phosphorus containing household products was not detailed. It's not clear to me that a 16% increase in phosphorus alone in raw sewage would make any difference in potentially negative environmental effects, namely, eutrophication.
2) In contrast to phsophates or citrates, zeolites can cause encrustration of fabrics, esp if the zeolite detergent is underdosed or overdosed. This may become apparent as harsher fabric feel, increase fabric wear, dimmed colors, and/or irritation to skin. The encrustation is a combination of excess zeolite plus zeolite upon which calcium carbonate has precipitated. Proper dosing appears to be more critical with zeolite-based detergents than with phosphate or citrate based formulations.
3) Although the article states that modern zeolite-based detergents perform overall as well as phosphated versions, no no data - other than volume of detergent sold over the years - and no studies are cited to support this claim.
