Integrated mechanism of arsenic retention by carbon structure and lattice oxygen during temperature-driven Shenmu coal gasification with sewage sludge addition - Yujia Du; Shugang Guo; Hugang Li; Yuhong Qin; Xiaofeng Liu; Tingrui Shi; Haofei Li; Wanyao Li; Qizhi Guo; Yuexing Wei; Chong He; Stanislav V. Vassilev (Fuel, 2026)